Father of the atomic bomb. The creators of the atomic bomb - who are they The founder of the atomic bomb

Creation of the Soviet atomic bomb(military part of the atomic project of the USSR) - fundamental research, development of technologies and their practical implementation in the USSR, aimed at creating weapons of mass destruction using nuclear energy. The events were stimulated to a large extent by the activities in this direction of scientific institutions and the military industry of other countries, primarily Nazi Germany and the United States [ ] . In 1945, on August 6 and 9, American planes dropped two atomic bombs on the Japanese cities of Hiroshima and Nagasaki. Almost half of the civilians died immediately in the explosions, others were seriously ill and continue to die to this day.

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  In 1930-1941, work was actively carried out in the nuclear field.

  In this decade, fundamental radiochemical research was carried out, without which a complete understanding of these problems, their development, and, even more so, their implementation, is generally unthinkable.

  Work in 1941-1943

  Foreign intelligence information

  As early as September 1941, the USSR began to receive intelligence information about the conduct of secret intensive research work in the UK and the USA aimed at developing methods for using atomic energy for military purposes and creating atomic bombs of enormous destructive power. One of the most important documents received back in 1941 by Soviet intelligence is the report of the British “MAUD Committee”. From the materials of this report, received through the channels of foreign intelligence NKVD USSR from Donald MacLean, it followed that the creation of an atomic bomb was real, that it could probably be created even before the end of the war and, therefore, could affect its course.

  Intelligence information about work on the problem of atomic energy abroad, which was available in the USSR at the time the decision was made to resume work on uranium, was obtained both through the channels of the NKVD intelligence and through the channels of the Main Intelligence Directorate of the General Staff (GRU) of the Red Army.

  In May 1942, the leadership of the GRU informed the Academy of Sciences of the USSR about the presence of reports of work abroad on the problem of using atomic energy for military purposes and asked to be informed whether this problem currently has a real practical basis. In June 1942, the answer to this request was given by V. G. Khlopin, who noted that over the past year, almost no works related to the solution of the problem of using atomic energy have been published in the scientific literature.

  An official letter from the head of the NKVD L.P. Beria addressed to I.V. Stalin with information about the work on the use of atomic energy for military purposes abroad, proposals for organizing these works in the USSR and secret acquaintance with the materials of the NKVD of prominent Soviet specialists, the variants of which were prepared by the NKVD officers back in late 1941 - early 1942, it was sent to I.V. Stalin only in October 1942, after the adoption of the GKO order to resume work on uranium in the USSR.

  Soviet intelligence had detailed information about the work on the creation of an atomic bomb in the United States, coming from specialists who understood the danger of a nuclear monopoly or sympathizers of the USSR, in particular, Klaus Fuchs, Theodor Hall, Georges Koval and David Greenglass. However, according to some, a letter addressed to Stalin at the beginning of 1943 by the Soviet physicist G. Flerov, who managed to explain the essence of the problem in a popular way, was of decisive importance. On the other hand, there is reason to believe that G. N. Flerov's work on the letter to Stalin was not completed and it was not sent.

  The hunt for data from America's uranium project began at the initiative of Leonid Kvasnikov, head of the NKVD scientific and technical intelligence department, as early as 1942, but only fully unfolded after the arrival in Washington of the famous couple of Soviet intelligence officers: Vasily Zarubin and his wife Elizaveta. It was with them that the resident of the NKVD in San Francisco, Grigory Kheifits, interacted, saying that the most prominent American physicist Robert Oppenheimer and many of his colleagues left California for an unknown place where they would be creating some kind of superweapon.

  To double-check the data of "Charon" (this was the code name of Heifitz) was entrusted to Lieutenant Colonel Semyon Semenov (pseudonym "Twain"), who had worked in the United States since 1938 and had assembled a large and active intelligence group there. It was Twain who confirmed the reality of the work on the creation of the atomic bomb, named the code for the Manhattan project and the location of its main scientific center - former colony for juvenile delinquents at Los Alamos in New Mexico. Semyonov also gave the names of some scientists who worked there, who at one time were invited to the USSR to participate in large Stalinist construction projects and who, having returned to the USA, did not lose ties with the extreme left organizations.

  Thus, Soviet agents were introduced into the scientific and design centers of America, where a nuclear weapon was created. However, in the midst of establishing intelligence operations, Lisa and Vasily Zarubin were urgently recalled to Moscow. They were lost in conjecture, because not a single failure happened. It turned out that the Center received a denunciation from Mironov, an employee of the residency, who accused the Zarubins of treason. And for almost half a year, Moscow counterintelligence checked these accusations. They were not confirmed, however, the Zarubins were no longer allowed to go abroad.

  In the meantime, the work of the embedded agents had already brought the first results - reports began to arrive, and they had to be immediately sent to Moscow. This work was entrusted to a group of special couriers. The most operative and fearless were the Coens, Maurice and Lona. After Maurice was called to American army, Lona began to independently deliver informational materials from the state of New Mexico to New York. To do this, she traveled to the small town of Albuquerque, where, for appearances, she visited a tuberculosis dispensary. There she met with agents undercover nicknames "Mlad" and "Ernst".

  However, the NKVD still managed to extract several tons of low-enriched uranium in.

  The primary tasks were the organization of industrial production of plutonium-239 and uranium-235. To solve the first problem, it was necessary to create experimental, and then industrial nuclear reactors, the construction of radiochemical and special metallurgical shops. To solve the second problem, the construction of a plant for the separation of uranium isotopes by the diffusion method was launched.

  The solution of these problems turned out to be possible as a result of the creation of industrial technologies, the organization of production and the development of the necessary large quantities of pure metallic uranium, uranium oxide, uranium hexafluoride, other uranium compounds, high purity graphite and a number of other special materials, the creation of a complex of new industrial units and devices. Insufficient production uranium ore and production of uranium concentrates in the USSR (the first plant for the production of uranium concentrate - "Combine No. 6 NKVD USSR" in Tajikistan was founded in 1945) during this period was compensated by trophy raw materials and products of uranium enterprises of Eastern Europe, with which the USSR entered into appropriate agreements.

  In 1945, the Government of the USSR made the following major decisions:

  • on the creation on the basis of the Kirov Plant (Leningrad) of two special experimental design bureaus designed to develop equipment for the production of uranium enriched in the isotope 235 by the gaseous diffusion method;
  • on the start of construction in the Middle Urals (near the village of Verkh-Neyvinsky) of a diffusion plant for the production of enriched uranium-235;
  • on the organization of a laboratory for work on the creation of heavy water reactors on natural uranium;
  • on the choice of a site and the start of construction in the South Urals of the country's first enterprise for the production of plutonium-239.

  The structure of the enterprise in the South Urals was to include:

  • uranium-graphite reactor on natural (natural) uranium (Plant "A");
  • radiochemical production for the separation of plutonium-239 from natural (natural) uranium irradiated in the reactor (plant "B");
  • chemical and metallurgical production for the production of high-purity metallic plutonium (Plant "B").

  Participation of German specialists in the nuclear project

  In 1945, hundreds of German scientists related to the nuclear problem were brought from Germany to the USSR. Most of them (about 300 people) were brought to Sukhumi and secretly placed in the former estates of Grand Duke Alexander Mikhailovich and the millionaire Smetsky (Sinop and Agudzery sanatoriums). Equipment was taken to the USSR from the German Institute of Chemistry and Metallurgy, the Kaiser Wilhelm Institute of Physics, Siemens electrical laboratories, and the Physical Institute of the German Post Office. Three of the four German cyclotrons, powerful magnets, electron microscopes, oscilloscopes, high voltage transformers, ultra-precise instruments were brought to the USSR. In November 1945, the Directorate was created as part of the NKVD of the USSR. special institutes(9th Directorate of the NKVD of the USSR) to guide the work on the use German specialists.

  Sanatorium "Sinop" was called "Object" A "" - it was led by Baron Manfred von Ardenne. "Agudzers" became "Object" G "" - it was headed by Gustav  Hertz. Outstanding scientists worked at objects "A" and "G" - Nikolaus Riehl, Max Vollmer, who built the first heavy water production plant in the USSR, Peter Thyssen, designer of nickel filters for gas diffusion separation of uranium isotopes, Max Steenbeck and Gernot Zippe, who worked on centrifuge separation method and subsequently received patents for gas centrifuges in the west. On the basis of objects "A" and "G" was later created (SFTI).

  Some leading German specialists were awarded USSR government awards for this work, including the Stalin Prize.

  In the period 1954-1959 German specialists in different time move to the GDR (Gernot Zippe - to Austria).

  Construction of a gas diffusion plant in Novouralsk

  In 1946, at the production base of plant No. 261 of the People's Commissariat of Aviation Industry in Novouralsk, the construction of a gas diffusion plant began, which was called Combine No. 813 (Plant D-1)) and intended for the production of highly enriched uranium. The plant gave the first production in 1949.

  Construction of uranium hexafluoride production in Kirovo-Chepetsk

  On the site of the selected construction site, over time, a whole complex of industrial enterprises, buildings and structures was erected, interconnected by a network of automobile and railways, heat and power supply system, industrial water supply and sewerage. At different times, the secret city was called differently, but the most famous name is Chelyabinsk-40 or Sorokovka. At present, the industrial complex, which was originally called plant No. 817, is called the Mayak production association, and the city on the shore of Lake Irtyash, in which Mayak workers and their families live, was named Ozyorsk.

  In November 1945, geological surveys began at the selected site, and from the beginning of December, the first builders began to arrive.

  The first head of construction (1946-1947) was Ya. D. Rappoport, later he was replaced by Major General M. M. Tsarevsky. The chief construction engineer was V. A. Saprykin, the first director of the future enterprise was P. T. Bystrov (from April 17, 1946), who was replaced by E. P. Slavsky (from July 10, 1947), and then B. G Muzrukov (since December 1, 1947). I. V. Kurchatov was appointed scientific director of the plant.

  Construction of Arzamas-16

  Products

  Development of the design of atomic bombs

  Decree of the Council of Ministers of the USSR No. 1286-525ss "On the plan for the deployment of KB-11 at Laboratory No. 2 of the USSR Academy of Sciences" defined the first tasks of KB-11: the creation under the scientific supervision of Laboratory No. 2 (Academician I. V. Kurchatov) of atomic bombs, conventionally named in the resolution "jet engines C", in two versions: RDS-1 - an implosion type with plutonium and a cannon-type atomic bomb RDS-2 with uranium-235.

  Tactical and technical specifications for the design of the RDS-1 and RDS-2 were to be developed by July 1, 1946, and the designs of their main components - by July 1, 1947. The fully manufactured RDS-1 bomb was to be presented for state tests for an explosion when installed on the ground by January 1, 1948, in an aviation version - by March 1, 1948, and the RDS-2 bomb - by June 1, 1948 and January 1, 1949, respectively. be carried out in parallel with the organization in KB-11 of special laboratories and the deployment of these laboratories. Such tight deadlines and the organization of parallel work also became possible due to the receipt in the USSR of some intelligence data on American atomic bombs.

  Research laboratories and design departments of KB-11 began to expand their activities directly in

  American Robert Oppenheimer and Soviet scientist Igor Kurchatov are officially recognized as the fathers of the atomic bomb. But in parallel, deadly weapons were developed in other countries (Italy, Denmark, Hungary), so the discovery rightfully belongs to everyone.

  The German physicists Fritz Strassmann and Otto Hahn were the first to tackle this issue, who in December 1938 for the first time managed to artificially split the atomic nucleus of uranium. And six months later, at the Kummersdorf test site near Berlin, the first reactor was already being built and urgently purchased uranium ore from the Congo.

  "Uranium project" - the Germans start and lose

  In September 1939, the Uranium Project was classified. 22 reputable scientific centers were attracted to participate in the program, the research was supervised by the Minister of Armaments Albert Speer. The construction of an isotope separation plant and the production of uranium for extracting an isotope from it that supports a chain reaction was entrusted to the IG Farbenindustry concern.

  For two years, a group of the venerable scientist Heisenberg studied the possibilities of creating a reactor with and heavy water. A potential explosive (the isotope uranium-235) could be isolated from uranium ore.

  

  But for this, an inhibitor is needed that slows down the reaction - graphite or heavy water. The choice of the last option created an insurmountable problem.

  The only plant for the production of heavy water, which was located in Norway, after the occupation was put out of action by local resistance fighters, and small stocks of valuable raw materials were taken to France.

  The explosion of an experimental nuclear reactor in Leipzig also prevented the rapid implementation of the nuclear program.

  Hitler supported the uranium project as long as he hoped to obtain a super-powerful weapon that could influence the outcome of the war he unleashed. After the cuts in public funding, the programs of work continued for some time.
  

  In 1944, Heisenberg managed to create cast uranium plates, and a special bunker was built for the reactor plant in Berlin.

  It was planned to complete the experiment to achieve a chain reaction in January 1945, but a month later the equipment was urgently transported to the Swiss border, where it was deployed only a month later. In a nuclear reactor there were 664 cubes of uranium weighing 1525 kg. It was surrounded by a graphite neutron reflector weighing 10 tons, an additional one and a half tons of heavy water was loaded into the core.

  On March 23, the reactor finally started working, but the report to Berlin was premature: the reactor did not reach a critical point, and a chain reaction did not occur. Additional calculations have shown that the mass of uranium must be increased by at least 750 kg, proportionally adding the amount of heavy water.

  But the reserves of strategic raw materials were at the limit, as was the fate of the Third Reich. On April 23, the Americans entered the village of Haigerloch, where the tests were carried out. The military dismantled the reactor and transported it to the United States.

  The first atomic bombs in the USA

  A little later, the Germans took up the development of the atomic bomb in the United States and Great Britain. It all started with a letter from Albert Einstein and his co-authors, immigrant physicists, sent by them in September 1939 to US President Franklin Roosevelt.

  The appeal stressed that Nazi Germany was close to building an atomic bomb.

  Stalin first learned about the work on nuclear weapons (both allies and opponents) from intelligence officers in 1943. They immediately decided to create a similar project in the USSR. The instructions were issued not only to scientists, but also to intelligence, for which the extraction of any information about nuclear secrets has become a super task.

  The invaluable information about the developments of American scientists, which Soviet intelligence officers managed to obtain, significantly advanced the domestic nuclear project. It helped our scientists avoid inefficient search paths and significantly speed up the implementation of the final goal.

  Serov Ivan Aleksandrovich - head of the operation to create a bomb

  Of course, the Soviet government could not ignore the successes of German nuclear physicists. After the war, a group of Soviet physicists was sent to Germany - future academicians in the form of colonels of the Soviet army.

  

  Ivan Serov, the first deputy commissar of internal affairs, was appointed head of the operation, which allowed scientists to open any doors.

  In addition to their German colleagues, they found reserves of uranium metal. This, according to Kurchatov, reduced the development time Soviet bomb for at least a year. More than one ton of uranium and leading nuclear specialists were also taken out of Germany by the American military.

  Not only chemists and physicists were sent to the USSR, but also skilled labor - mechanics, electricians, glass blowers. Some employees were found in POW camps. In total, about 1,000 German specialists worked on the Soviet nuclear project.

  German scientists and laboratories on the territory of the USSR in the postwar years

  A uranium centrifuge and other equipment were transported from Berlin, as well as documents and reagents from the von Ardenne laboratory and the Kaiser Institute of Physics. As part of the program, laboratories "A", "B", "C", "D" were created, which were headed by German scientists.

  

  The head of laboratory "A" was Baron Manfred von Ardenne, who developed a method for gaseous diffusion purification and separation of uranium isotopes in a centrifuge.

  For the creation of such a centrifuge (only on an industrial scale) in 1947, he received the Stalin Prize. At that time, the laboratory was located in Moscow, on the site of the famous Kurchatov Institute. The team of each German scientist included 5-6 Soviet specialists.
  

  Later, laboratory "A" was taken to Sukhumi, where a physico-technical institute was created on its basis. In 1953, Baron von Ardenne became a Stalin laureate for the second time.

  Laboratory "B", which conducted experiments in the field of radiation chemistry in the Urals, was headed by Nikolaus Riehl - a key figure in the project. There, in Snezhinsk, the talented Russian geneticist Timofeev-Resovsky worked with him, with whom they were friends back in Germany. The successful test of the atomic bomb brought Riel the star of the Hero of Socialist Labor and the Stalin Prize.

  The research of laboratory "B" in Obninsk was led by Professor Rudolf Pose, a pioneer in the field of nuclear testing. His team managed to create fast neutron reactors, the first nuclear power plant in the USSR, and designs for reactors for submarines.

  On the basis of the laboratory, the A.I. Leipunsky. Until 1957, the professor worked in Sukhumi, then in Dubna, at the Joint Institute for Nuclear Technologies.

  Laboratory "G", located in the Sukhumi sanatorium "Agudzery", was headed by Gustav Hertz. The nephew of the famous 19th-century scientist gained fame after a series of experiments that confirmed the ideas of quantum mechanics and the theory of Niels Bohr.

  The results of his productive work in Sukhumi were used to create an industrial plant in Novouralsk, where in 1949 they made the filling of the first Soviet bomb RDS-1.

  

  The uranium bomb that the Americans dropped on Hiroshima was a cannon-type bomb. When creating the RDS-1, domestic nuclear physicists were guided by the Fat Boy, the “Nagasaki bomb”, made from plutonium according to the implosive principle.

  In 1951, Hertz was awarded the Stalin Prize for his fruitful work.

  German engineers and scientists lived in comfortable houses, they brought their families, furniture, paintings from Germany, they were provided with a decent salary and special food. Did they have the status of prisoners? According to academician A.P. Alexandrov, an active participant in the project, they were all prisoners in such conditions.

  Having received permission to return to their homeland, the German specialists signed a non-disclosure agreement about their participation in the Soviet atomic project for 25 years. In the GDR, they continued to work in their specialty. Baron von Ardenne was twice a laureate of the German National Prize.
  

  Professor headed Physics Institute in Dresden, which was created under the auspices of the Scientific Council for the Peaceful Uses of Atomic Energy. The Scientific Council was headed by Gustav Hertz, who received the National Prize of the GDR for his three-volume textbook on atomic physics. Here, in Dresden, at the Technical University, Professor Rudolf Pose also worked.

  The participation of German specialists in the Soviet atomic project, as well as the achievements of Soviet intelligence, do not diminish the merits of Soviet scientists, who, with their heroic labor, created domestic atomic weapons. And yet, without the contribution of each participant in the project, the creation of the atomic industry and the nuclear bomb would have dragged on for indefinite

  “I am not the simplest person,” the American physicist Isidor Isaac Rabi once remarked. “But compared to Oppenheimer, I am very, very simple.” Robert Oppenheimer was one of central figures of the twentieth century, the very "complexity" of which absorbed the political and ethical contradictions of the country.

  During World War II, the brilliant physicist Ajulius Robert Oppenheimer led the development of American nuclear scientists to create the first atomic bomb in human history. The scientist led a secluded and secluded life, and this gave rise to suspicions of treason.

  Atomic weapons are the result of all previous developments in science and technology. Discoveries that are directly related to its occurrence were made at the end of the 19th century. A huge role in revealing the secrets of the atom was played by the studies of A. Becquerel, Pierre Curie and Marie Sklodowska-Curie, E. Rutherford and others.

  At the beginning of 1939 French physicist Joliot-Curie concluded that a chain reaction was possible, which would lead to an explosion of monstrous destructive power and that uranium could become an energy source, like an ordinary explosive. This conclusion was the impetus for the development of nuclear weapons.

  Europe was on the eve of World War II, and the potential possession of such a powerful weapon pushed militaristic circles to create it as soon as possible, but the problem of the availability of a large amount of uranium ore for large-scale research was a brake. The physicists of Germany, England, the USA, Japan worked on the creation of atomic weapons, realizing that it was impossible to work without a sufficient amount of uranium ore, the USA in September 1940 purchased a large amount of the required ore under false documents from Belgium, which allowed them to work on the creation nuclear weapons in full swing.

  From 1939 to 1945, more than two billion dollars were spent on the Manhattan Project. A huge uranium refinery was built at Oak Ridge, Tennessee. H.C. Urey and Ernest O. Lawrence (inventor of the cyclotron) proposed a purification method based on the principle of gaseous diffusion followed by magnetic separation of two isotopes. A gas centrifuge separated the light Uranium-235 from the heavier Uranium-238.

  On the territory of the United States, in Los Alamos, in the desert expanses of the state of New Mexico, in 1942, an American nuclear center was established. Many scientists worked on the project, but the main one was Robert Oppenheimer. Under his leadership, the best minds of that time were gathered not only from the USA and England, but from almost all of Western Europe. A huge team worked on the creation of nuclear weapons, including 12 Nobel Prize winners. Work in Los Alamos, where the laboratory was located, did not stop for a minute. In Europe, meanwhile, the Second World War was going on, and Germany carried out mass bombing of the cities of England, which endangered the English atomic project “Tub Alloys”, and England voluntarily transferred its developments and leading scientists of the project to the USA, which allowed the USA to take a leading position in the development of nuclear physics (creation of nuclear weapons).

  

  "The father of the atomic bomb", he was at the same time an ardent opponent of American nuclear policy. Bearing the title of one of the most outstanding physicists of his time, he studied with pleasure the mysticism of ancient Indian books. A communist, traveler and staunch American patriot, a very spiritual person, he was nevertheless willing to betray his friends in order to defend himself against the attacks of anti-communists. The scientist who devised a plan to cause the most damage to Hiroshima and Nagasaki cursed himself for "innocent blood on his hands."

  Writing about this controversial man is not an easy task, but an interesting one, and the 20th century was marked by a number of books about him. However, the rich life of the scientist continues to attract biographers.

  Oppenheimer was born in New York in 1903 to wealthy and educated Jewish parents. Oppenheimer was brought up in love for painting, music, in an atmosphere of intellectual curiosity. In 1922, he entered Harvard University and in just three years received an honors degree, his main subject was chemistry. In the next few years, the precocious young man traveled to several countries in Europe, where he worked with physicists who dealt with the problems of investigating atomic phenomena in the light of new theories. Just a year after graduating from university, Oppenheimer published scientific work, which showed how deeply he understands new methods. Soon he, together with the famous Max Born, developed the most important part of quantum theory, known as the Born-Oppenheimer method. In 1927, his outstanding doctoral dissertation brought him worldwide fame.

  In 1928 he worked at the Zurich and Leiden universities. In the same year he returned to the USA. From 1929 to 1947 Oppenheimer taught at the University of California and the California Institute of Technology. From 1939 to 1945 he actively participated in the work on the creation of an atomic bomb as part of the Manhattan Project; heading the specially created Los Alamos laboratory.

  In 1929, Oppenheimer, a rising star in science, accepted offers from two of several universities that were vying for the right to invite him. During the spring semester he taught at the vibrant, fledgling Caltech in Pasadena, and during the fall and winter semesters at UC Berkeley, where he became the first lecturer in quantum mechanics. In fact, the erudite scholar had to adjust for some time, gradually reducing the level of discussion to the capabilities of his students. In 1936 he fell in love with Jean Tatlock, a restless and moody young woman whose passionate idealism found expression in communist activities. Like many thinking people of that time, Oppenheimer explored the ideas of the left movement as one of the possible alternatives, although he did not join the Communist Party, which made him younger brother, sister-in-law and many of his friends. His interest in politics, as well as his ability to read Sanskrit, was the natural result of a constant pursuit of knowledge. In his own words, he was also deeply disturbed by the explosion of anti-Semitism in Nazi Germany and Spain and invested $1,000 a year from his $15,000 annual salary in projects related to the activities of communist groups. After meeting Kitty Harrison, who became his wife in 1940, Oppenheimer parted ways with Jean Tetlock and moved away from her circle of leftist friends.

  In 1939, the United States learned that in preparation for a global war, Nazi Germany had discovered the fission of the atomic nucleus. Oppenheimer and other scientists immediately guessed that the German physicists would try to get a controlled chain reaction that could be the key to creating a weapon far more destructive than any that existed at that time. Enlisting the support of the great scientific genius, Albert Einstein, concerned scientists warned President Franklin D. Roosevelt of the danger in a famous letter. In authorizing funding for projects aimed at creating untested weapons, the president acted in strict secrecy. Ironically, many leading scientists worked with American scientists in laboratories scattered throughout the country. scientists of the world forced to flee their homeland. One part of the university groups explored the possibility of creating a nuclear reactor, others took up the solution of the problem of separating the uranium isotopes necessary for the release of energy in a chain reaction. Oppenheimer, who had previously been busy theoretical problems, offered to organize a wide front of work only at the beginning of 1942.

  

  The US Army's atomic bomb program was codenamed Project Manhattan and was led by Colonel Leslie R. Groves, 46, a professional military man. Groves, who described the scientists working on the atomic bomb as "a costly bunch of lunatics," however, acknowledged that Oppenheimer had a hitherto untapped ability to control his fellow debaters when the heat was on. The physicist proposed that all scientists be united in one laboratory in the quiet provincial town of Los Alamos, New Mexico, in an area that he knew well. By March 1943, the boarding house for boys had been turned into a tightly guarded secret center, of which Oppenheimer became scientific director. By insisting on the free exchange of information between scientists, who were strictly forbidden to leave the center, Oppenheimer created an atmosphere of trust and mutual respect, which contributed to the amazing success in his work. Not sparing himself, he remained the head of all areas of this complex project, although his personal life suffered greatly from this. But for a mixed group of scientists - among whom there were more than a dozen then or future Nobel laureates and of which a rare person did not possess a pronounced individuality - Oppenheimer was an unusually dedicated leader and subtle diplomat. Most of them would agree that the lion's share of the credit for the project's eventual success belongs to him. By December 30, 1944, Groves, who by that time had become a general, could confidently say that the two billion dollars spent would be ready for action by August 1 of the next year. But when Germany admitted defeat in May 1945, many of the researchers working at Los Alamos began to think about using new weapons. After all, probably, Japan would have capitulated soon without the atomic bombing. Should the United States be the first country in the world to use such a terrible device? Harry S. Truman, who became president after Roosevelt's death, appointed a committee to study possible consequences use of the atomic bomb, which included Oppenheimer. Experts decided to recommend dropping an atomic bomb without warning on a major Japanese military facility. Oppenheimer's consent was also obtained.

  

  All these worries would, of course, be moot if the bomb had not gone off. The test of the world's first atomic bomb was carried out on July 16, 1945, about 80 kilometers from the air base in Alamogordo, New Mexico. The device under test, named "Fat Man" for its convex shape, was attached to a steel tower set up in a desert area. At precisely 5:30 a.m., a remote-controlled detonator set off the bomb. With an echoing roar across a 1.6 kilometer diameter area, a gigantic purple-green-orange fireball shot up into the sky. The earth shook from the explosion, the tower disappeared. A white column of smoke rapidly rose to the sky and began to gradually expand, taking on an awesome mushroom shape at an altitude of about 11 kilometers. The first nuclear explosion startled scientific and military observers near the test site and turned their heads. But Oppenheimer remembered the lines from the Indian epic poem Bhagavad Gita: "I will become Death, the destroyer of worlds." Until the end of his life, satisfaction from scientific success was always mixed with a sense of responsibility for the consequences.
  

  On the morning of August 6, 1945, there was a clear, cloudless sky over Hiroshima. As before, the approach from the east of two American aircraft (one of them was called Enola Gay) at an altitude of 10-13 km did not cause alarm (because every day they appeared in the sky of Hiroshima). One of the planes dived and dropped something, and then both planes turned and flew away. The dropped object on a parachute slowly descended and suddenly exploded at an altitude of 600 m above the ground. It was the "Baby" bomb.

  Three days after The Kid was blown up in Hiroshima, exact copy The first "Fat Man" was dropped on the city of Nagasaki. On August 15, Japan, whose resolve had finally been broken by this new weapon, signed an unconditional surrender. However, the voices of skeptics were already being heard, and Oppenheimer himself predicted two months after Hiroshima that "mankind will curse the names of Los Alamos and Hiroshima."

  The whole world was shocked by the explosions in Hiroshima and Nagasaki. Tellingly, Oppenheimer managed to combine the excitement of testing a bomb on civilians and the joy that the weapon had finally been tested.
  

  Nevertheless, the following year he accepted an appointment as chairman of the scientific council of the Atomic Energy Commission (AEC), thus becoming the most influential adviser to the government and the military on nuclear issues. While the West and the Stalin-led Soviet Union were seriously preparing for the Cold War, each side focused its attention on the arms race. Although many of the Manhattan Project's scientists did not support the idea of ​​creating a new weapon, former Oppenheimer employees Edward Teller and Ernest Lawrence felt that US national security required the rapid development of a hydrogen bomb. Oppenheimer was horrified. From his point of view, the two nuclear powers were already opposed to each other, like "two scorpions in a jar, each able to kill the other, but only at the risk of his own life." With the spread of new weapons in wars, there would no longer be winners and losers - only victims. And the "father of the atomic bomb" made a public statement that he was against the development of the hydrogen bomb. Always out of place under Oppenheimer and clearly envious of his accomplishments, Teller began to make an effort to head the new project, implying that Oppenheimer should no longer be involved in the work. He told FBI investigators that his rival was keeping scientists from working on the hydrogen bomb with his authority, and revealed the secret that Oppenheimer suffered from seizures in his youth. severe depression. When President Truman agreed in 1950 to finance the development of the hydrogen bomb, Teller could celebrate victory.

  In 1954, Oppenheimer's enemies launched a campaign to remove him from power, which they succeeded after a month-long search for "black spots" in his personal biography. As a result, a show case was organized in which Oppenheimer was opposed by many influential political and scientific figures. As Albert Einstein later put it: "Oppenheimer's problem was that he loved a woman who didn't love him: the US government."

  By allowing Oppenheimer's talent to flourish, America doomed him to death.

  
  

  Oppenheimer is known not only as the creator of the American atomic bomb. He owns many works on quantum mechanics, relativity theory, elementary particle physics, theoretical astrophysics. In 1927 he developed the theory of the interaction of free electrons with atoms. Together with Born, he created the theory of the structure of diatomic molecules. In 1931, he and P. Ehrenfest formulated a theorem, the application of which to the nitrogen nucleus showed that the proton-electron hypothesis of the structure of nuclei leads to a number of contradictions with the known properties of nitrogen. Investigated the internal conversion of g-rays. In 1937 he developed the cascade theory of cosmic showers, in 1938 he made the first calculation of the neutron star model, in 1939 he predicted the existence of "black holes".

  Oppenheimer owns a number of popular books, including - Science and everyday knowledge (Science and the Common Understanding, 1954), Open Mind (The Open Mind, 1955), Some Reflections on Science and Culture (Some Reflections on Science and Culture, 1960) . Oppenheimer died in Princeton on February 18, 1967.
  

  Work on nuclear projects in the USSR and the USA began simultaneously. In August 1942, a secret "Laboratory No. 2" began to work in one of the buildings in the courtyard of Kazan University. Igor Kurchatov was appointed its leader.

  In Soviet times, it was claimed that the USSR solved its atomic problem completely independently, and Kurchatov was considered the "father" of the domestic atomic bomb. Although there were rumors about some secrets stolen from the Americans. And only in the 90s, 50 years later, one of the main characters then, Yuli Khariton, spoke about the significant role of intelligence in accelerating the laggard Soviet project. And American scientific and technical results were obtained by Klaus Fuchs, who arrived in the English group.

  Information from abroad helped the country's leadership to make a difficult decision - to start work on nuclear weapons during the most difficult war. Exploration allowed our physicists to save time, helped to avoid a "misfire" at the first atomic test which was of great political importance.

  In 1939, a chain reaction of fission of uranium-235 nuclei was discovered, accompanied by the release of colossal energy. Shortly thereafter from the pages scientific journals articles on nuclear physics began to disappear. This could indicate a real prospect of creating an atomic explosive and weapons based on it.

  After the discovery by Soviet physicists of the spontaneous fission of uranium-235 nuclei and the determination of the critical mass for residency on the initiative of the head of the scientific and technological revolution

  L. Kvasnikov, a corresponding directive was sent out.

  In the FSB of Russia (the former KGB of the USSR), 17 volumes of archival file No. 13676, which documented who and how attracted US citizens to work for Soviet intelligence, lie under the heading "keep forever" under the heading "keep forever". Only a few of the top leadership of the KGB of the USSR had access to the materials of this case, the classification of which was removed only recently. The first information about the work on the creation of the American atomic bomb Soviet intelligence received in autumn 1941. And already in March 1942, extensive information about the ongoing research in the United States and England fell on the table of I.V. Stalin. According to Yu. B. Khariton, in that dramatic period it was more reliable to use the bomb scheme already tested by the Americans for our first explosion. “Taking into account the interests of the state, any other decision was then unacceptable. The merit of Fuchs and our other assistants abroad is undoubted. However, we implemented the American scheme in the first test not so much from technical as from political considerations.
  

  The announcement that the Soviet Union had mastered the secret of nuclear weapons aroused in the US ruling circles a desire to unleash a preventive war as soon as possible. The Troyan plan was developed, which provided for the start fighting January 1, 1950. At that time, the United States had 840 strategic bombers in combat units, 1350 in reserve and over 300 atomic bombs.

  A test site was built near the city of Semipalatinsk. Exactly at 7:00 am on August 29, 1949, the first Soviet nuclear device under the code name "RDS-1" was blown up at this test site.

  The Troyan plan, according to which atomic bombs were to be dropped on 70 cities of the USSR, was thwarted due to the threat of a retaliatory strike. The event that took place at the Semipalatinsk test site informed the world about the creation of nuclear weapons in the USSR.

  Foreign intelligence not only drew the attention of the country's leadership to the problem of creating atomic weapons in the West and thereby initiated similar work in our country. Thanks to the information foreign intelligence, according to academicians A. Aleksandrov, Yu. Khariton and others, I. Kurchatov did not make big mistakes, we managed to avoid dead ends in the creation of atomic weapons and create an atomic bomb in the USSR in a shorter time, in just three years, while the United States four years were spent on this, having spent five billion dollars on its creation.

  As Academician Yu. Khariton noted in an interview with the Izvestiya newspaper on December 8, 1992, the first Soviet atomic charge was made according to the American model with the help of information received from K. Fuchs. According to the academician, when government awards were presented to participants in the Soviet atomic project, Stalin, satisfied that there was no American monopoly in this area, remarked: “If we were late for one to a year and a half, then we would probably try this charge on ourselves.” ".

  The world of the atom is so fantastic that its understanding requires a radical break in the usual concepts of space and time. Atoms are so small that if a drop of water could be enlarged to the size of the Earth, each atom in that drop would be smaller than an orange. In fact, one drop of water is made up of 6000 billion billion (6000000000000000000000) hydrogen and oxygen atoms. And yet, despite its microscopic size, the atom has a structure to some extent similar to the structure of our solar system. In its incomprehensibly small center, the radius of which is less than one trillionth of a centimeter, is a relatively huge "sun" - the nucleus of an atom.

  Around this atomic "sun" tiny "planets" - electrons - revolve. The nucleus consists of two main building blocks of the Universe - protons and neutrons (they have a unifying name - nucleons). An electron and a proton are charged particles, and the amount of charge in each of them is exactly the same, but the charges differ in sign: the proton is always positively charged, and the electron is always negative. The neutron does not carry an electric charge and therefore has a very high permeability.

  In the atomic measurement scale, the mass of the proton and neutron is taken as unity. The atomic weight of any chemical element therefore depends on the number of protons and neutrons contained in its nucleus. For example, a hydrogen atom, whose nucleus consists of only one proton, has an atomic mass of 1. A helium atom, with a nucleus of two protons and two neutrons, has an atomic mass of 4.

  The nuclei of atoms of the same element always contain the same number of protons, but the number of neutrons may be different. Atoms that have nuclei with the same number of protons, but differ in the number of neutrons and related to varieties of the same element, are called isotopes. To distinguish them from each other, a number is assigned to the symbol of the element, equal to the sum of all particles in the nucleus of a given isotope.

  The question may arise: why does the nucleus of an atom not fall apart? After all, the protons included in it are electrically charged particles with the same charge, which must repel each other with great force. This is explained by the fact that inside the nucleus there are also so-called intranuclear forces that attract the particles of the nucleus to each other. These forces compensate for the repulsive forces of protons and do not allow the nucleus to fly apart spontaneously.

  The intranuclear forces are very strong, but they act only at very close range. Therefore, nuclei of heavy elements, consisting of hundreds of nucleons, turn out to be unstable. The particles of the nucleus are in constant motion here (within the volume of the nucleus), and if you add some additional amount of energy to them, they can overcome internal forces - the nucleus will be divided into parts. The amount of this excess energy is called the excitation energy. Among the isotopes of heavy elements, there are those that seem to be on the very verge of self-decay. Only a small "push" is enough, for example, a simple hit in the nucleus of a neutron (and it should not even be accelerated to high speed) to initiate a nuclear fission reaction. Some of these "fissile" isotopes were later made artificially. In nature, there is only one such isotope - it is uranium-235.

  Uranus was discovered in 1783 by Klaproth, who isolated it from uranium pitch and named it after the recently discovered planet Uranus. As it turned out later, it was, in fact, not uranium itself, but its oxide. Pure uranium, a silvery-white metal, was obtained
  only in 1842 Peligot. The new element did not have any remarkable properties and did not attract attention until 1896, when Becquerel discovered the phenomenon of radioactivity of uranium salts. After that, uranium became an object scientific research and experiments, but practical application still didn't have.

  When, in the first third of the 20th century, the structure of the atomic nucleus more or less became clear to physicists, they first of all tried to fulfill the old dream of alchemists - they tried to turn one chemical element into another. In 1934, the French researchers, the spouses Frederic and Irene Joliot-Curie, reported to the French Academy of Sciences about the following experiment: when aluminum plates were bombarded with alpha particles (nuclei of the helium atom), aluminum atoms turned into phosphorus atoms, but not ordinary, but radioactive, which, in turn, passed into a stable isotope of silicon. Thus, an aluminum atom, having added one proton and two neutrons, turned into a heavier silicon atom.

  This experience led to the idea that if the nuclei of the heaviest of the elements existing in nature - uranium, are "shelled" with neutrons, then an element can be obtained that does not exist in natural conditions. In 1938, the German chemists Otto Hahn and Fritz Strassmann repeated in general terms the experience of the Joliot-Curie spouses, taking uranium instead of aluminum. The results of the experiment were not at all what they expected - instead of a new superheavy element with a mass number greater than that of uranium, Hahn and Strassmann received light elements from the middle part of the periodic system: barium, krypton, bromine and some others. The experimenters themselves could not explain the observed phenomenon. It was not until the following year that the physicist Lisa Meitner, to whom Hahn reported her difficulties, found a correct explanation for the observed phenomenon, suggesting that when uranium was bombarded with neutrons, its nucleus split (fissioned). In this case, nuclei of lighter elements should have been formed (this is where barium, krypton and other substances were taken from), as well as 2-3 free neutrons should have been released. Further research allowed to clarify in detail the picture of what is happening.

  Natural uranium consists of a mixture of three isotopes with masses of 238, 234 and 235. The main amount of uranium falls on the 238 isotope, the nucleus of which includes 92 protons and 146 neutrons. Uranium-235 is only 1/140 of natural uranium (0.7% (it has 92 protons and 143 neutrons in its nucleus), and uranium-234 (92 protons, 142 neutrons) is only 1/17500 of total mass uranium (0.006%. The least stable of these isotopes is uranium-235.

  From time to time, the nuclei of its atoms spontaneously divide into parts, as a result of which lighter elements of the periodic system are formed. The process is accompanied by the release of two or three free neutrons, which rush at a tremendous speed - about 10 thousand km / s (they are called fast neutrons). These neutrons can hit other uranium nuclei, causing nuclear reactions. Each isotope behaves differently in this case. Uranium-238 nuclei in most cases simply capture these neutrons without any further transformations. But in about one case out of five, when a fast neutron collides with the nucleus of the 238 isotope, a curious nuclear reaction occurs: one of the uranium-238 neutrons emits an electron, turning into a proton, that is, the uranium isotope turns into more
  the heavy element is neptunium-239 (93 protons + 146 neutrons). But neptunium is unstable - after a few minutes one of its neutrons emits an electron, turning into a proton, after which the neptunium isotope turns into the next element of the periodic system - plutonium-239 (94 protons + 145 neutrons). If a neutron enters the nucleus of unstable uranium-235, then fission immediately occurs - the atoms decay with the emission of two or three neutrons. It is clear that in natural uranium, most of whose atoms belong to the 238 isotope, this reaction has no visible consequences - all free neutrons will eventually be absorbed by this isotope.

  But what if we imagine a fairly massive piece of uranium, consisting entirely of the 235 isotope?

  Here the process will go differently: the neutrons released during the fission of several nuclei, in turn, falling into neighboring nuclei, cause their fission. As a result, a new portion of neutrons is released, which splits the following nuclei. Under favorable conditions, this reaction proceeds like an avalanche and is called a chain reaction. A few bombarding particles may suffice to start it.

  Indeed, let only 100 neutrons bombard uranium-235. They will split 100 uranium nuclei. In this case, 250 new neutrons of the second generation will be released (an average of 2.5 per fission). The neutrons of the second generation will already produce 250 fissions, at which 625 neutrons will be released. In the next generation it will be 1562, then 3906, then 9670, and so on. The number of divisions will increase without limit if the process is not stopped.

  However, in reality, only an insignificant part of neutrons gets into the nuclei of atoms. The rest, swiftly rushing between them, are carried away into the surrounding space. A self-sustaining chain reaction can only occur in a sufficiently large array of uranium-235, which is said to have a critical mass. (This mass under normal conditions is 50 kg.) It is important to note that the fission of each nucleus is accompanied by the release of a huge amount of energy, which turns out to be about 300 million times more than the energy spent on fission! (It has been calculated that with the complete fission of 1 kg of uranium-235, the same amount of heat is released as when burning 3 thousand tons of coal.)

  This colossal surge of energy, released in a matter of moments, manifests itself as an explosion of monstrous force and underlies the operation of nuclear weapons. But in order for this weapon to become a reality, it is necessary that the charge does not consist of natural uranium, but of a rare isotope - 235 (such uranium is called enriched). Later it was found that pure plutonium is also a fissile material and can be used in an atomic charge instead of uranium-235.

  All these important discoveries were made on the eve of World War II. Soon secret work began in Germany and other countries on the creation of an atomic bomb. In the United States, this problem was taken up in 1941. The whole complex of works was given the name of the "Manhattan Project".

  The administrative leadership of the project was carried out by General Groves, and the scientific direction was carried out by Professor Robert Oppenheimer of the University of California. Both were well aware of the enormous complexity of the task before them. Therefore, Oppenheimer's first concern was the acquisition of a highly intelligent scientific team. In the United States at that time there were many physicists who had emigrated from fascist Germany. It was not easy to involve them in the creation of weapons directed against their former homeland. Oppenheimer spoke to everyone personally, using the full force of his charm. Soon he managed to gather a small group of theorists, whom he jokingly called "luminaries." And in fact, it included the largest experts of that time in the field of physics and chemistry. (Among them are 13 Nobel Prize winners, including Bohr, Fermi, Frank, Chadwick, Lawrence.) In addition to them, there were many other specialists of various profiles.

  The US government did not skimp on spending, and from the very beginning the work assumed a grandiose scope. In 1942, the world's largest research laboratory was founded at Los Alamos. The population of this scientific city soon reached 9 thousand people. In terms of the composition of scientists, the scope of scientific experiments, the number of specialists and workers involved in the work, the Los Alamos Laboratory had no equal in world history. The Manhattan Project had its own police, counterintelligence, communications system, warehouses, settlements, factories, laboratories, and its own colossal budget.

  The main goal of the project was to obtain enough fissile material from which to create several atomic bombs. In addition to uranium-235, as already mentioned, the artificial element plutonium-239 could serve as a charge for the bomb, that is, the bomb could be either uranium or plutonium.

  Groves and Oppenheimer agreed that work should be carried out simultaneously in two directions, since it is impossible to decide in advance which of them will be more promising. Both methods were fundamentally different from each other: the accumulation of uranium-235 had to be carried out by separating it from the bulk of natural uranium, and plutonium could only be obtained as a result of a controlled nuclear reaction by irradiating uranium-238 with neutrons. Both paths seemed unusually difficult and did not promise easy solutions.

  Indeed, how can two isotopes be separated from each other, which differ only slightly in their weight and chemically behave in exactly the same way? Neither science nor technology has ever faced such a problem. Plutonium production also seemed very problematic at first. Prior to this, the entire experience of nuclear transformations was reduced to a few laboratory experiments. Now it was necessary to master the production of kilograms of plutonium on an industrial scale, develop and create a special installation for this - a nuclear reactor, and learn how to control the course of a nuclear reaction.

  And here and there a whole complex of complex problems had to be solved. Therefore, the "Manhattan Project" consisted of several subprojects, headed by prominent scientists. Oppenheimer himself was the head of the Los Alamos Science Laboratory. Lawrence was in charge of the Radiation Laboratory at the University of California. Fermi led research at the University of Chicago on the creation of a nuclear reactor.

  Initially, the most important problem was obtaining uranium. Before the war, this metal actually had no use. Now that it was needed immediately in huge quantities, it turned out that there was no industrial way to produce it.

  The Westinghouse company undertook its development and quickly achieved success. After purification of uranium resin (in this form, uranium occurs in nature) and obtaining uranium oxide, it was converted into tetrafluoride (UF4), from which metallic uranium was isolated by electrolysis. If at the end of 1941, American scientists had only a few grams of metallic uranium at their disposal, then already in November 1942, its industrial production at the Westinghouse plants reached 6,000 pounds per month.

  At the same time, work was underway on the creation of a nuclear reactor. The plutonium production process actually boiled down to the irradiation of uranium rods with neutrons, as a result of which part of the uranium-238 had to turn into plutonium. Sources of neutrons in this case could be fissile uranium-235 atoms scattered in sufficient quantities among uranium-238 atoms. But in order to maintain a constant reproduction of neutrons, a chain reaction of fission of uranium-235 atoms had to begin. Meanwhile, as already mentioned, for every atom of uranium-235 there were 140 atoms of uranium-238. It is clear that the neutrons flying in all directions were much more likely to meet exactly them on their way. That is, a huge number of released neutrons turned out to be absorbed by the main isotope to no avail. Obviously, under such conditions, the chain reaction could not go. How to be?

  At first it seemed that without the separation of two isotopes, the operation of the reactor was generally impossible, but one important circumstance was soon established: it turned out that uranium-235 and uranium-238 were susceptible to neutrons of different energies. It is possible to split the nucleus of an atom of uranium-235 with a neutron of relatively low energy, having a speed of about 22 m/s. Such slow neutrons are not captured by uranium-238 nuclei - for this they must have a speed of the order of hundreds of thousands of meters per second. In other words, uranium-238 is powerless to prevent the start and progress of a chain reaction in uranium-235 caused by neutrons slowed down to extremely low speeds - no more than 22 m/s. This phenomenon was discovered by the Italian physicist Fermi, who lived in the United States since 1938 and supervised the work on the creation of the first reactor here. Fermi decided to use graphite as a neutron moderator. According to his calculations, the neutrons emitted from uranium-235, having passed through a layer of graphite of 40 cm, should have reduced their speed to 22 m/s and started a self-sustaining chain reaction in uranium-235.

  The so-called "heavy" water could serve as another moderator. Since the hydrogen atoms that make up it are very close in size and mass to neutrons, they could best slow them down. (About the same thing happens with fast neutrons as with balls: if a small ball hits a large one, it rolls back, almost without losing speed, but when it meets a small ball, it transfers a significant part of its energy to it - just like a neutron in an elastic collision bounces off a heavy nucleus only slightly slowing down, and on collision with the nuclei of hydrogen atoms very quickly loses all its energy.) However, ordinary water is not suitable for slowing down, since its hydrogen tends to absorb neutrons. That is why deuterium, which is part of "heavy" water, should be used for this purpose.

  In early 1942, under the leadership of Fermi, construction began on the first ever nuclear reactor in the tennis court under the west stands of the Chicago Stadium. All work was carried out by the scientists themselves. The reaction can be controlled in the only way - by adjusting the number of neutrons involved in the chain reaction. Fermi envisioned doing this with rods made from materials such as boron and cadmium, which absorb neutrons strongly. Graphite bricks served as a moderator, from which physicists erected columns 3 m high and 1.2 m wide. Rectangular blocks with uranium oxide were installed between them. About 46 tons of uranium oxide and 385 tons of graphite went into the entire structure. To slow down the reaction, cadmium and boron rods introduced into the reactor served.

  If this weren't enough, then for insurance, on a platform located above the reactor, there were two scientists with buckets filled with a solution of cadmium salts - they were supposed to pour them on the reactor if the reaction got out of control. Fortunately, this was not required. On December 2, 1942, Fermi ordered all the control rods to be extended, and the experiment began. Four minutes later, the neutron counters began to click louder and louder. With every minute, the intensity of the neutron flux became greater. This indicated that a chain reaction was taking place in the reactor. It went on for 28 minutes. Then Fermi signaled, and the lowered rods stopped the process. Thus, for the first time, man released the energy of the atomic nucleus and proved that he could control it at will. Now there was no longer any doubt that nuclear weapons were a reality.

  In 1943, the Fermi reactor was dismantled and transported to the Aragonese National Laboratory (50 km from Chicago). Was here shortly
  another nuclear reactor was built, in which heavy water was used as a moderator. It consisted of a cylindrical aluminum tank containing 6.5 tons of heavy water, into which 120 rods of uranium metal were vertically loaded, enclosed in an aluminum shell. The seven control rods were made from cadmium. Around the tank was a graphite reflector, then a screen made of lead and cadmium alloys. The entire structure was enclosed in a concrete shell with a wall thickness of about 2.5 m.

  Experiments at these experimental reactors confirmed the possibility of industrial production of plutonium.

  The main center of the "Manhattan Project" soon became the town of Oak Ridge in the Tennessee River Valley, whose population in a few months grew to 79 thousand people. Here, in a short time, the first plant for the production of enriched uranium was built. Immediately in 1943, an industrial reactor was launched that produced plutonium. In February 1944, about 300 kg of uranium was extracted from it daily, from the surface of which plutonium was obtained by chemical separation. (To do this, the plutonium was first dissolved and then precipitated.) The purified uranium was then returned to the reactor again. In the same year, in the barren, desolate desert on south coast Columbia River began construction of the huge Hanford plant. Three powerful nuclear reactors were located here, giving several hundred grams of plutonium daily.

  In parallel, research was in full swing to develop an industrial process for uranium enrichment.

  After considering different options, Groves and Oppenheimer decided to focus on two methods: gas diffusion and electromagnetic.

  The gas diffusion method was based on a principle known as Graham's law (it was first formulated in 1829 by the Scottish chemist Thomas Graham and developed in 1896 by the English physicist Reilly). In accordance with this law, if two gases, one of which is lighter than the other, are passed through a filter with negligibly small openings, then a little more light gas will pass through it than heavy gas. In November 1942, Urey and Dunning at Columbia University created a gaseous diffusion method for separating uranium isotopes based on the Reilly method.

  Since natural uranium is a solid, it was first converted to uranium fluoride (UF6). This gas was then passed through microscopic - on the order of thousandths of a millimeter - holes in the filter septum.

  Since the difference in the molar weights of the gases was very small, behind the baffle the content of uranium-235 increased only by a factor of 1.0002.

  In order to increase the amount of uranium-235 even more, the resulting mixture is again passed through a partition, and the amount of uranium is again increased by 1.0002 times. Thus, in order to increase the content of uranium-235 to 99%, it was necessary to pass the gas through 4000 filters. This took place in a huge gaseous diffusion plant at Oak Ridge.

  In 1940, under the leadership of Ernst Lawrence at the University of California, research began on the separation of uranium isotopes by the electromagnetic method. It was necessary to find such physical processes that would allow isotopes to be separated using the difference in their masses. Lawrence made an attempt to separate isotopes using the principle of a mass spectrograph - an instrument that determines the masses of atoms.

  The principle of its operation was as follows: pre-ionized atoms were accelerated by an electric field, and then passed through a magnetic field in which they described circles located in a plane perpendicular to the direction of the field. Since the radii of these trajectories were proportional to the mass, the light ions ended up on circles of a smaller radius than the heavy ones. If traps were placed in the path of the atoms, then it was possible in this way to separately collect different isotopes.

  That was the method. Under laboratory conditions, he gave good results. But the construction of a plant in which isotope separation could be carried out on an industrial scale proved to be extremely difficult. However, Lawrence eventually managed to overcome all difficulties. The result of his efforts was the appearance of the calutron, which was installed in a giant plant in Oak Ridge.

  This electromagnetic plant was built in 1943 and turned out to be perhaps the most expensive brainchild of the Manhattan Project. Lawrence's method required a large number of complex, not yet developed devices associated with high voltage, high vacuum and strong magnetic fields. The costs were enormous. Calutron had a giant electromagnet, the length of which reached 75 m and weighed about 4000 tons.

  Several thousand tons of silver wire went into the windings for this electromagnet.

  The entire work (excluding the cost of $300 million worth of silver, which the State Treasury provided only temporarily) cost $400 million. Only for the electricity spent by the calutron, the Ministry of Defense paid 10 million. Much of the equipment at the Oak Ridge factory was superior in scale and precision to anything ever developed in the field.

  But all these expenses were not in vain. Having spent a total of about 2 billion dollars, US scientists by 1944 created a unique technology for uranium enrichment and plutonium production. Meanwhile, at the Los Alamos Laboratory, they were working on the design of the bomb itself. The principle of its operation was in general terms clear for a long time: the fissile substance (plutonium or uranium-235) should have been transferred to a critical state at the time of the explosion (for a chain reaction to occur, the mass of the charge must be even noticeably larger than the critical one) and irradiated with a neutron beam, which entailed is the start of a chain reaction.

  According to calculations, the critical mass of the charge exceeded 50 kilograms, but it could be significantly reduced. In general, the magnitude of the critical mass is strongly influenced by several factors. The larger the surface area of ​​the charge, the more neutrons are emitted uselessly into the surrounding space. A sphere has the smallest surface area. Consequently, spherical charges, other things being equal, have the smallest critical mass. In addition, the value of the critical mass depends on the purity and type of fissile materials. It is inversely proportional to the square of the density of this material, which allows, for example, by doubling the density, to reduce the critical mass by a factor of four. The required degree of subcriticality can be obtained, for example, by compacting the fissile material due to the explosion of a conventional explosive charge made in the form of a spherical shell surrounding the nuclear charge. The critical mass can also be reduced by surrounding the charge with a screen that reflects neutrons well. Lead, beryllium, tungsten, natural uranium, iron, and many others can be used as such a screen.

  One of the possible designs of the atomic bomb consists of two pieces of uranium, which, when combined, form a mass greater than the critical one. In order to cause a bomb explosion, you need to bring them together as quickly as possible. The second method is based on the use of an inward-converging explosion. In this case, the flow of gases from a conventional explosive was directed at the fissile material located inside and compressing it until it reached a critical mass. The connection of the charge and its intense irradiation with neutrons, as already mentioned, causes a chain reaction, as a result of which, in the first second, the temperature rises to 1 million degrees. During this time, only about 5% of the critical mass managed to separate. The rest of the charge in early bomb designs evaporated without
  any good.

  The first atomic bomb in history (it was given the name "Trinity") was assembled in the summer of 1945. And on June 16, 1945, the first atomic explosion on Earth was carried out at the nuclear test site in the Alamogordo desert (New Mexico). The bomb was placed in the center of the test site on top of a 30-meter steel tower. Recording equipment was placed around it at a great distance. At 9 km there was an observation post, and at 16 km - a command post. The atomic explosion made a tremendous impression on all the witnesses of this event. According to the description of eyewitnesses, there was a feeling that many suns merged into one and lit up the polygon at once. Then a huge ball of fire appeared above the plain, and a round cloud of dust and light began to slowly and ominously rise towards it.

  After taking off from the ground, this fireball flew up to a height of more than three kilometers in a few seconds. With every moment it grew in size, soon its diameter reached 1.5 km, and it slowly rose into the stratosphere. The fireball then gave way to a column of swirling smoke, which stretched out to a height of 12 km, taking the form of a giant mushroom. All this was accompanied by a terrible roar, from which the earth trembled. The power of the exploded bomb exceeded all expectations.

  As soon as the radiation situation allowed, several Sherman tanks, lined with lead plates from the inside, rushed into the explosion area. On one of them was Fermi, who was eager to see the results of his work. Dead scorched earth appeared before his eyes, on which all life was destroyed within a radius of 1.5 km. The sand sintered into a glassy greenish crust that covered the ground. In a huge crater lay the mutilated remains of a steel support tower. The force of the explosion was estimated at 20,000 tons of TNT.

  The next step was to be combat use bombs against Japan, which, after the surrender of fascist Germany, alone continued the war with the United States and its allies. There were no launch vehicles then, so the bombing had to be carried out from an aircraft. The components of the two bombs were transported with great care by the USS Indianapolis to Tinian Island, where the US Air Force 509th Composite Group was based. By type of charge and design, these bombs were somewhat different from each other.

  The first bomb - "Baby" - was a large-sized aerial bomb with an atomic charge of highly enriched uranium-235. Its length was about 3 m, diameter - 62 cm, weight - 4.1 tons.

  The second bomb - "Fat Man" - with a charge of plutonium-239 had an egg shape with a large-sized stabilizer. Its length
  was 3.2 m, diameter 1.5 m, weight - 4.5 tons.

  On August 6, Colonel Tibbets' B-29 Enola Gay bomber dropped the "Kid" on the large Japanese city of Hiroshima. The bomb was dropped by parachute and exploded, as it was planned, at an altitude of 600 m from the ground.

  The consequences of the explosion were terrible. Even on the pilots themselves, the sight of the peaceful city destroyed by them in an instant made a depressing impression. Later, one of them admitted that they saw at that moment the worst thing that a person can see.

  For those who were on earth, what was happening looked like a real hell. First of all, a heat wave passed over Hiroshima. Its action lasted only a few moments, but it was so powerful that it melted even tiles and quartz crystals in granite slabs, turned telephone poles into coal at a distance of 4 km and, finally, so incinerated human bodies that only shadows remained of them on the pavement asphalt. or on the walls of houses. Then a monstrous gust of wind escaped from under the fireball and rushed over the city at a speed of 800 km / h, sweeping away everything in its path. The houses that could not withstand his furious onslaught collapsed as if they had been cut down. In a giant circle with a diameter of 4 km, not a single building remained intact. A few minutes after the explosion, a black radioactive rain passed over the city - this moisture turned into steam condensed in the high layers of the atmosphere and fell to the ground in the form of large drops mixed with radioactive dust.

  After the rain, a new gust of wind hit the city, this time blowing in the direction of the epicenter. He was weaker than the first, but still strong enough to uproot trees. The wind fanned a gigantic fire in which everything that could burn was burning. Of the 76,000 buildings, 55,000 were completely destroyed and burned down. Witnesses of this terrible catastrophe recalled people-torches from which burnt clothes fell to the ground along with tatters of skin, and crowds of distraught people, covered with terrible burns, who rushed screaming through the streets. There was a suffocating stench of burnt human flesh in the air. People lay everywhere, dead and dying. There were many who were blind and deaf and, poking in all directions, could not make out anything in the chaos that reigned around.

  The unfortunate, who were from the epicenter at a distance of up to 800 m, burned out in a split second in the literal sense of the word - their insides evaporated, and their bodies turned into lumps of smoking coals. Located at a distance of 1 km from the epicenter, they were struck by radiation sickness in an extremely severe form. Within a few hours, they began to vomit severely, the temperature jumped to 39-40 degrees, shortness of breath and bleeding appeared. Then, non-healing ulcers appeared on the skin, the composition of the blood changed dramatically, and the hair fell out. After terrible suffering, usually on the second or third day, death occurred.

  In total, about 240 thousand people died from the explosion and radiation sickness. About 160 thousand received radiation sickness in a milder form - their painful death was delayed by several months or years. When the news of the catastrophe spread throughout the country, all of Japan was paralyzed with fear. It increased even more after Major Sweeney's Box Car aircraft dropped a second bomb on Nagasaki on August 9th. Several hundred thousand inhabitants were also killed and wounded here. Unable to resist the new weapons, the Japanese government capitulated - the atomic bomb put an end to World War II.

  War is over. It lasted only six years, but managed to change the world and people almost beyond recognition.

  Human civilization before 1939 and human civilization after 1945 are strikingly different from each other. There are many reasons for this, but one of the most important is the emergence of nuclear weapons. It can be said without exaggeration that the shadow of Hiroshima lies over the entire second half of the 20th century. It became a deep moral burn for many millions of people, both those who were contemporaries of this catastrophe and those born decades after it. Modern man he can no longer think about the world the way he thought about it before August 6, 1945 - he understands too clearly that this world can turn into nothing in a few moments.

  A modern person cannot look at the war, as his grandfathers and great-grandfathers watched - he knows for sure that this war will be the last, and there will be neither winners nor losers in it. Nuclear weapons have left their mark on all spheres public life, and modern civilization cannot live by the same laws as sixty or eighty years ago. No one understood this better than the creators of the atomic bomb themselves.

  "People of our planet Robert Oppenheimer wrote, should unite. The horror and destruction sown by the last war dictate this thought to us. Explosions of atomic bombs proved it with all cruelty. Other people at other times have said similar words - only about other weapons and other wars. They didn't succeed. But whoever says today that these words are useless is deceived by the vicissitudes of history. We cannot be convinced of this. The results of our labor leave no other choice for humanity but to create a unified world. A world based on law and humanism."

  Changes in US military doctrine between 1945 and 1996 and basic concepts

  //

  On the territory of the United States, in Los Alamos, in the desert expanses of the state of New Mexico, in 1942, an American nuclear center was established. At its base, work was launched to create a nuclear bomb. The overall management of the project was entrusted to the talented nuclear physicist R. Oppenheimer. Under his leadership, the best minds of that time were gathered not only from the USA and England, but from almost all of Western Europe. A huge team worked on the creation of nuclear weapons, including 12 Nobel Prize winners. There was no shortage of funds either.

  By the summer of 1945, the Americans managed to assemble two atomic bombs, called "Kid" and "Fat Man". The first bomb weighed 2722 kg and was loaded with enriched Uranium-235. "Fat Man" with a charge of Plutonium-239 with a capacity of more than 20 kt had a mass of 3175 kg. On June 16, the first field test took place nuclear device timed to coincide with the meeting of the leaders of the USSR, USA, Great Britain and France.

  By this time, relations between former associates had changed. It should be noted that the United States, as soon as they got the atomic bomb, sought to have a monopoly on its possession in order to deprive other countries of the opportunity to use atomic energy at their discretion.

  US President G. Truman became the first political leader who decided to use nuclear bombs. From a military point of view, there was no need for such bombardments of densely populated Japanese cities. But political motives during this period prevailed over military ones. The leadership of the United States aspired to supremacy throughout the post-war world, and nuclear bombing, in their opinion, should have been a powerful reinforcement of these aspirations. To this end, they began to seek the adoption of the American "Baruch Plan", which would secure the US monopoly atomic weapons in other words, "absolute military superiority".

  The fateful hour has come. On August 6 and 9, the crews of B-29 "Enola Gay" and "Bocks car" planes dropped their deadly cargo on the cities of Hiroshima and Nagasaki. The total human losses and the extent of destruction from these bombings are characterized by the following figures: 300 thousand people died instantly from thermal radiation (temperature about 5000 degrees C) and a shock wave, another 200 thousand were injured, burned, irradiated. On an area of ​​12 sq. km, all buildings were completely destroyed. In Hiroshima alone, out of 90,000 buildings, 62,000 were destroyed. These bombings shocked the whole world. This event is believed to have started the race nuclear weapons and confrontation between the two political systems of that time at a new qualitative level.

  The development of American strategic offensive weapons after the Second World War was carried out depending on the provisions of military doctrine. Its political side determined the main goal of the US leadership - the achievement of world domination. The main obstacle to these aspirations was considered the Soviet Union, which, in their opinion, should have been liquidated. Depending on the alignment of forces in the world, the achievements of science and technology, its main provisions changed, which was reflected in the adoption of certain strategic strategies(concepts). Each subsequent strategy did not completely replace the one that preceded it, but only modernized it, mainly in matters of determining the ways of building up the Armed Forces and methods of waging war.

  From mid-1945 to 1953, the American military-political leadership in matters of building strategic nuclear forces(SNF) proceeded from the fact that the United States has a monopoly on nuclear weapons and can achieve world domination by eliminating the USSR during a nuclear war. Preparations for such a war began almost immediately after the defeat of Nazi Germany. This is evidenced by the directive of the Joint Military Planning Committee No. 432 / d dated December 14, 1945, which set the task of preparing the atomic bombing of 20 Soviet cities - the main political and industrial centers Soviet Union. At the same time, it was planned to use the entire stock of atomic bombs available at that time (196 pieces), which were carried by modernized B-29 bombers. The method of their application was also determined - a sudden atomic "first strike", which should put the Soviet leadership before the fact of the futility of further resistance.

  The political justification for such actions is the thesis of the "Soviet threat", one of the main authors of which can be considered US Chargé d'Affaires in the USSR J. Kennan. It was he who, on February 22, 1946, sent a “long telegram” to Washington, where in eight thousand words he described the “life threat” that seemed to hang over the United States, and proposed a strategy for confrontation with the Soviet Union.

  President G. Truman instructed to develop a doctrine (later called the "Truman Doctrine") of pursuing a policy from a position of strength in relation to the USSR. In order to centralize planning and increase the effectiveness of the use of strategic aviation, in the spring of 1947 a strategic aviation command (SAC) was created. At the same time, the task of improving strategic aviation technology is being implemented at an accelerated pace.

  By mid-1948, the Committee of Chiefs of Staff drew up a plan for a nuclear war with the USSR, which received the code name Chariotir. It stipulated that the war should begin "with concentrated air raids using atomic bombs against government, political and administrative centers, industrial cities and selected oil refineries from bases in the Western Hemisphere and England." In the first 30 days alone, it was planned to drop 133 nuclear bombs on 70 Soviet cities.

  However, as American military analysts calculated, this was not enough to achieve a quick victory. They believed that during this time Soviet army will be able to master the key regions of Europe and Asia. In early 1949, a special committee was created from the highest ranks of the army, air force and navy, under the leadership of Lieutenant General H. Harmon, who was tasked with trying to assess the political and military consequences of the planned atomic attack on the Soviet Union from the air. The conclusions and calculations of the committee clearly showed that the United States was nuclear war not yet ready.

  The conclusions of the committee indicated that it was necessary to increase the quantitative composition of the SAC, increase its combat capabilities, and replenish nuclear arsenals. To ensure a massive nuclear strike by air assets, the United States needs to create a network of bases along the borders of the USSR, from which nuclear bombers could carry out combat sorties along the shortest routes to planned targets on Soviet territory. It is necessary to launch serial production of B-36 heavy strategic intercontinental bombers capable of operating from bases on American soil.

  The announcement that the Soviet Union had mastered the secret of nuclear weapons aroused in the US ruling circles a desire to unleash a preventive war as soon as possible. The Troyan plan was developed, which provided for the start of hostilities on January 1, 1950. At that time, the SAC had 840 strategic bombers in combat units, 1350 in reserve and over 300 atomic bombs.

  To assess its vitality, the Committee of the Chiefs of Staff ordered the group of Lieutenant General D. Hull to test the chances of putting out of action nine of the most important strategic areas on the territory of the Soviet Union at headquarters games. Having lost the air offensive against the USSR, Hull's analysts summed up: the probability of achieving these goals is 70%, which will entail the loss of 55% of the available bombers. It turned out that US strategic aviation in this case would very quickly lose combat effectiveness. Therefore, the question of a preventive war in 1950 was removed. Soon, the American leadership was able to actually verify the correctness of such assessments. During the Korean War, which began in 1950, B-29 bombers suffered heavy losses from attacks by jet fighter aircraft.

  But the situation in the world was changing rapidly, which was reflected in the American strategy of "massive retaliation" adopted in 1953. It was based on the superiority of the United States over the USSR in the number of nuclear weapons and their means of delivery. It was envisaged to conduct a general nuclear war against the countries socialist camp. Strategic aviation was considered the main means of achieving victory, for the development of which up to 50% of the funds allocated to the Ministry of Defense for the purchase of weapons were directed.

  In 1955, SAC had 1,565 bombers, 70% of which were B-47 jets, and 4,750 nuclear bombs for them with a yield of 50 kt to 20 Mt. In the same year, the B-52 heavy strategic bomber was put into service, which is gradually becoming the main intercontinental carrier of nuclear weapons.

  At the same time, the military-political leadership of the United States is beginning to realize that in the conditions of the rapid growth of the capabilities of Soviet air defense systems, heavy bombers will not be able to solve the problem of achieving victory in a nuclear war alone. In 1958, the medium-range ballistic missiles "Thor" and "Jupiter", which are being deployed in Europe, enter service. A year later, the first Atlas-D intercontinental missiles were put on combat duty, the nuclear submarine J. Washington" with missiles "Polaris-A1".

  With the advent of ballistic missiles in the strategic nuclear forces, the possibilities for delivering a nuclear strike from the United States are significantly increasing. However, in the USSR, by the end of the 1950s, intercontinental carriers of nuclear weapons were being created, capable of delivering a retaliatory strike on the territory of the United States. Soviet ICBMs were of particular concern to the Pentagon. Under these conditions, the leaders of the United States considered that the strategy of "massive retaliation" did not fully correspond to modern realities and should be adjusted.

  By the beginning of 1960, nuclear planning in the United States was taking on a centralized character. Prior to this, each branch of the Armed Forces planned the use of nuclear weapons independently. But the increase in the number of strategic carriers required the creation of a single body for planning nuclear operations. They became the Joint Strategic Objectives Planning Headquarters, subordinate to the commander of the SAC and the Committee of the Chiefs of Staff of the US Armed Forces. In December 1960, the first unified plan for the conduct of a nuclear war was drawn up, which received the name "Unified Integrated Operational Plan" - SIOP. It envisaged, in accordance with the requirements of the "massive retaliation" strategy, waging only a general nuclear war against the USSR and China with unlimited use of nuclear weapons (3.5 thousand nuclear warheads).

  In 1961, the "flexible response" strategy was adopted, reflecting changes in official views on the possible nature of the war with the USSR. In addition to a general nuclear war, American strategists began to allow the possibility of limited use of nuclear weapons and warfare with conventional weapons for a short time (no more than two weeks). The choice of methods and means of waging war had to be carried out taking into account the current geostrategic situation, the balance of forces and the availability of resources.

  for the development of American strategic weapons new installations had a very significant impact. A rapid quantitative growth of ICBMs and SLBMs begins. Special attention is paid to the improvement of the latter, since they could be used as "forward-based" means in Europe. At the same time, the American government no longer needed to look for possible deployment areas for them and persuade the Europeans to give their consent to the use of their territory, as was the case during the deployment of medium-range missiles.

  The military-political leadership of the United States believed that it was necessary to have such a quantitative composition of strategic nuclear forces, the use of which would ensure the "guaranteed destruction" of the Soviet Union as a viable state.

  In the early years of this decade, a significant constellation of ICBMs was deployed. So, if at the beginning of 1960 the SAC had 20 missiles of only one type - Atlas-D, then by the end of 1962 - already 294. By this time, Atlas intercontinental ballistic missiles of modifications "E" were adopted and "F", "Titan-1" and "Minuteman-1A". The latest ICBMs were several orders of magnitude higher than their predecessors in terms of sophistication. In the same year on combat patrol the tenth American SSBN was released. The total number of Polaris-A1 and Polaris-A2 SLBMs has reached 160 units. The last of the ordered B-52H heavy bombers and B-58 medium bombers entered service. The total number of bombers in the strategic aviation command was 1819. Thus, the American nuclear triad of strategic offensive forces (units and formations of ICBMs, nuclear missile submarines and strategic bombers) took shape organizationally, each component of which harmoniously complemented each other. It was equipped with over 6,000 nuclear warheads.

  In mid-1961, the SIOP-2 plan was approved, reflecting a "flexible response" strategy. It provided for the conduct of five interconnected operations to destroy the Soviet nuclear arsenal, suppress the air defense system, destroy the organs and points of the military and government controlled, large groupings of troops, as well as strikes on cities. The total number of targets in the plan was 6,000. In place of those, the developers of the plan also took into account the possibility of a retaliatory nuclear strike by the Soviet Union on US territory.

  At the beginning of 1961, a commission was formed, whose duties were charged with developing promising ways for the development of American strategic nuclear forces. Subsequently, such commissions were created regularly.

  In the autumn of 1962, the world was again on the brink of nuclear war. burst out Caribbean crisis forced politicians around the world to look at nuclear weapons from a new angle. For the first time, it clearly played the role of a deterrent. Sudden appearance for the USA Soviet missiles medium-range in Cuba and their lack of overwhelming superiority in the number of ICBMs and SLBMs over the Soviet Union made a military way to resolve the conflict impossible.

  The American military leadership immediately declared the need for rearmament, in fact, heading for unleashing a strategic offensive arms race (START). The desires of the military found due support in the US Senate. Enormous money was allocated for the development of strategic offensive arms, which made it possible to improve the strategic nuclear forces qualitatively and quantitatively. In 1965, the Thor and Jupiter missiles, the Atlas missiles of all modifications and the Titan-1 were completely decommissioned. They were replaced by the Minuteman-1B and Minuteman-2 intercontinental missiles, as well as the heavy Titan-2 ICBM.

  The marine component of the SNA has grown significantly both quantitatively and qualitatively. Taking into account such factors as the almost undivided dominance of the US Navy and the combined fleet of NATO in the vast oceans in the early 60s, the high survivability, stealth and mobility of SSBNs, the American leadership decided to significantly increase the number of deployed submarine missile carriers that could successfully replace medium-sized missiles. range. Their main targets were to be large industrial and administrative centers of the Soviet Union and other socialist countries.

  In 1967, the strategic nuclear forces had 41 SSBNs with 656 missiles, of which more than 80% were Polaris-A3 SLBMs, 1054 ICBMs and over 800 heavy bombers. After the decommissioning of obsolete B-47 aircraft, the nuclear bombs intended for them were eliminated. In connection with the change in strategic aviation tactics, the B-52 was equipped with AGM-28 Hound Dog cruise missiles with a nuclear warhead.

  The rapid growth in the second half of the 60s in the number of Soviet OS-type ICBMs with improved characteristics, the creation of a missile defense system, made the likelihood of America achieving a quick victory in a possible nuclear war miserable.

  The strategic nuclear arms race posed more and more new tasks for the US military-industrial complex. needed to be found new way rapid build-up of nuclear power. The high scientific and production level of the leading American rocket-building firms made it possible to solve this problem as well. Designers have found a way to significantly increase the number of nuclear charges raised without increasing the number of their carriers. Multiple reentry vehicles (MIRVs) were developed and implemented, first with dispersive warheads, and then with individual guidance.

  The US leadership decided that the time had come to slightly correct the military-technical side of its military doctrine. Using the tried-and-tested thesis of the "Soviet missile threat" and the "US lagging behind", it easily managed to allocate funds for new strategic weapons. Since 1970, the deployment of Minuteman-3 ICBMs and Poseidon-S3 SLBMs with MIRV-type MIRVs began. At the same time, the obsolete Minuteman-1B and Polaris were removed from combat duty.

  In 1971, the strategy of "realistic deterrence" was officially adopted. It was based on the idea of ​​nuclear superiority over the USSR. The authors of the strategy took into account the upcoming equality in the number of strategic carriers between the US and the USSR. By that time, without taking into account the nuclear forces of England and France, the following balance of strategic weapons had developed. For land-based ICBMs, the United States has 1,054 versus 1,300 for the Soviet Union; for the number of SLBMs, 656 versus 300; and for strategic bombers, 550 versus 145, respectively. The new strategy in the development of strategic offensive arms provided for a sharp increase in the number of nuclear warheads on ballistic missiles while improving their tactical and technical characteristics, which was supposed to provide a qualitative superiority over the strategic nuclear forces of the Soviet Union.

  The improvement of the strategic offensive forces was reflected in the next plan - SIOP-4, adopted in 1971. It was developed taking into account the interaction of all components of the nuclear triad and provided for the defeat of 16,000 targets.

  But under pressure from the world community, the US leadership was forced to negotiate on nuclear disarmament. The methods of conducting such negotiations were regulated by the concept of "negotiating from a position of strength" - an integral part of the "realistic deterrence" strategy. In 1972, the US-USSR Treaty on the Limitation of ABM Systems and the Interim Agreement on Certain Measures in the Sphere of the Limitation of Strategic Offensive Arms (SALT-1) were concluded. However, the buildup of the strategic nuclear potential of the opposing political systems continued.

  By the mid-1970s, the deployment of the Minuteman-3 and Poseidon missile systems was completed. All SSBNs of the Lafayette type, equipped with new missiles, have been upgraded. Heavy bombers were armed with nuclear SD SRAM. All this led to a sharp increase in the nuclear arsenal assigned to strategic delivery vehicles. So in five years from 1970 to 1975, the number of warheads increased from 5102 to 8500 pieces. The system of combat control of strategic weapons was being improved at full speed, which made it possible to implement the principle of quickly re-aiming warheads at new targets. It now took only a few tens of minutes to completely recalculate and replace the flight mission for one missile, and the entire grouping of SNA ICBMs could be retargeted in 10 hours. By the end of 1979, this system was implemented on all ICBM launchers and launch control points. At the same time, the security of the mine launchers of the Minuteman ICBMs was increased.

  The qualitative improvement in US START made it possible to move from the concept of "assured destruction" to the concept of "selection of targets", which provided for multivariate actions - from a limited nuclear strike with several missiles to a massive strike against the entire complex of planned targets of destruction. The SIOP-5 plan was drawn up and approved in 1975, which provided for strikes on military, administrative and economic targets of the Soviet Union and the Warsaw Pact countries in a total number of up to 25 thousand.

  The main form of use of American strategic offensive weapons was considered to be a sudden massive nuclear strike with all combat-ready ICBMs and SLBMs, as well as a certain number of heavy bombers. By this time, SLBMs had become the leaders in the US nuclear triad. If until 1970 most of the nuclear warheads belonged to strategic aviation, then in 1975 4536 warheads were installed on 656 sea-based missiles (2154 charges on 1054 ICBMs, and 1800 on heavy bombers). The views on their use have also changed. In addition to attacking cities, given the short flight time (12-18 minutes), submarine missiles could be used to destroy launching Soviet ICBMs in the active part of the trajectory or directly in launchers, preventing their launch before the American ICBMs approached. The latter were entrusted with the task of destroying highly protected targets, and above all, silos and command posts of missile units of the Strategic Missile Forces. In this way, a Soviet retaliatory nuclear strike on US territory could be thwarted or significantly weakened. Heavy bombers were planned to be used to destroy surviving or newly identified targets.

  From the second half of the 1970s, the transformation of the views of the American political leadership on the prospects for nuclear war began. Taking into account the opinion of the majority of scientists about the disastrous for the United States even a retaliatory Soviet nuclear strike, it decided to accept the theory of a limited nuclear war for one theater of operations, and specifically, the European one. For its implementation, new nuclear weapons were needed.

  The administration of President J. Carter allocated funds for the development and production of the highly effective strategic sea-based Trident system. Implementation this project was to be carried out in two stages. At the first, it was planned to rearm 12 SSBNs of the J. Madison" missiles "Trident-C4", as well as build and put into operation 8 SSBNs of a new generation of the "Ohio" type with 24 of the same missiles. At the second stage, it was supposed to build another 14 SSBNs and arm all the boats of this project with the new Trident-D5 SLBM with higher performance characteristics.

  In 1979, President J. Carter decides on the full-scale production of intercontinental ballistic missile"Peskyper" ("MX"), which, in terms of its characteristics, was supposed to surpass all existing Soviet ICBMs. Its development has been carried out since the mid-70s along with the Pershing-2 IRBM and a new type of strategic weapon - long-range ground and air-based cruise missiles.

  With the coming to power of the administration of President R. Reagan, the “doctrine of neo-globalism” appeared, reflecting the new views of the US military-political leadership on the path to achieving world domination. It provided for a wide range of measures (political, economic, ideological, military) to "roll back communism", the direct use of military force against those countries where the United States sees a threat to its "vital interests." Naturally, the military-technical side of the doctrine was also adjusted. Its basis for the 1980s was the strategy of "direct confrontation" with the USSR on a global and regional scale, aimed at achieving "complete and undeniable military superiority of the United States."

  Soon, the Pentagon developed "Guidelines for the construction of the US armed forces" for the coming years. In particular, they determined that in a nuclear war "the United States must prevail and be able to force the USSR to cease hostilities in a short time on the terms of the United States." Military plans provided for the conduct of both general and limited nuclear war within the framework of one theater of operations. In addition, the task was to be ready to wage an effective war from space.

  Based on these provisions, concepts for the development of the SNA were developed. The concept of "strategic sufficiency" required to have such a combat composition of strategic carriers and nuclear warheads for them in order to ensure the "deterrence" of the Soviet Union. The concept of "active countermeasures" envisaged ways to ensure flexibility in the use of strategic offensive forces in any situation - from a single use of nuclear weapons to the use of the entire nuclear arsenal.

  In March 1980, the president approves the SIOP-5D plan. The plan provided for the application of three options nuclear strikes: preventive, counter-reciprocal and reciprocal. The number of objects of destruction was 40 thousand, which included 900 cities with a population of over 250 thousand each, 15 thousand industrial and economic facilities, 3,500 military targets in the USSR, the Warsaw Pact countries, China, Vietnam and Cuba.

  In early October 1981, President Reagan announced his " strategic program» for the 80s, which contained directions for further building up the strategic nuclear potential. At six meetings of the Committee on Military Affairs of the US Congress, the last hearings on this program were held. Representatives of the president, the Ministry of Defense, leading scientists in the field of armaments were invited to them. As a result of comprehensive discussions of all structural elements, the strategic arms buildup program was approved. In accordance with it, starting from 1983, 108 Pershing-2 IRBM launchers and 464 BGM-109G land-based cruise missiles were deployed in Europe as forward-based nuclear weapons.

  In the second half of the 1980s, another concept was developed - "essential equivalence". It determined how, in the conditions of the reduction and elimination of some types of strategic offensive weapons, by improving the combat characteristics of others, to ensure a qualitative superiority over the strategic nuclear forces of the USSR.

  Since 1985, the deployment of 50 silo-based MX ICBMs began (another 50 missiles of this type in a mobile version were planned to be put on combat duty in the early 1990s) and 100 B-1B heavy bombers. The production of BGM-86 air-launched cruise missiles to equip 180 B-52 bombers was in full swing. A new MIRV with more powerful warheads was installed on the 350 Minuteman-3 ICBMs, while the control system was modernized.

  An interesting situation developed after the deployment of Pershing-2 missiles in West Germany. Formally, this group was not part of the US SNA and was the nuclear means of the Supreme Commander of the Allied Armed Forces of NATO in Europe (this position has always been occupied by US representatives). official version, for the world community, its deployment in Europe was a reaction to the appearance of RSD-10 (SS-20) missiles in the Soviet Union and the need to re-arm NATO in the face of a missile threat from the East. In fact, the reason was, of course, different, which was confirmed by the Supreme Commander of the Allied NATO Armed Forces in Europe, General B. Rogers. In 1983, in one of his speeches, he said: “Most people believe that we are undertaking the modernization of our weapons because of the SS-20 missiles. We would have carried out the modernization even if there were no SS-20 missiles.”

  The main purpose of the Pershings (considered in the SIOP plan) was to deliver a "decapitation strike" on the command posts of the strategic formations of the USSR Armed Forces and the Strategic Missile Forces in Eastern Europe, which was supposed to disrupt the Soviet retaliatory strike. To do this, they had all the necessary tactical and technical characteristics: a short flight time (8-10 minutes), high firing accuracy and a nuclear charge capable of hitting highly protected targets. Thus, it became clear that they were intended to solve strategic offensive tasks.

  Land-based cruise missiles, also considered NATO's nuclear weapons, have become a dangerous weapon. But their use was envisaged in accordance with the SIOP plan. Their main advantage was the high accuracy of firing (up to 30 m) and the secrecy of the flight, which took place at an altitude of several tens of meters, which, combined with a small effective dispersion area, made it extremely difficult for the air defense system to intercept such missiles. The targets for the KR could be any pinpoint highly protected targets such as command posts, silos, etc.

  However, by the end of the 1980s, the USA and the USSR had accumulated such a huge nuclear capability that he has long outgrown reasonable limits. There was a situation when it was necessary to make a decision what to do next. The situation was aggravated by the fact that half of the ICBMs (Minuteman-2 and part of Minuteman-3) had been in operation for 20 years or more. Maintaining them in a combat-ready state cost more and more every year. Under these conditions, the country's leadership decided on the possibility of a 50% reduction in strategic offensive arms, subject to a reciprocal step on the part of the Soviet Union. Such an agreement was concluded at the end of July 1991. Its provisions largely determined the development of strategic weapons for the 1990s. A directive was given for the development of such strategic offensive arms, so that the USSR would need to spend large financial and material resources to parry the threat from them.

  The situation changed radically after the collapse of the Soviet Union. As a result, the United States achieved world domination and remained the only "superpower" of the world. Finally, the political part of the American military doctrine was carried out. But with the end of the Cold War, according to the Clinton administration, threats to US interests have remained. In 1995, the report "National Military Strategy" appeared, presented by the chairman of the committee of the chiefs of staff of the Armed Forces, and sent to Congress. It became the last of the official documents that set out the provisions of the new military doctrine. It is based on a “strategy of flexible and selective engagement”. Certain adjustments in the new strategy have been made to the content of the main strategic concepts.

  The military-political leadership still relies on force, and the Armed Forces are preparing to wage war and achieve "victory in any wars, wherever and whenever they arise." Naturally, the military structure is being improved, including the strategic nuclear forces. They are entrusted with the task of deterring and intimidating a potential enemy, both in peacetime and at the entrance to a general or limited war using conventional weapons.

  A significant place in theoretical developments is given to the place and methods of operation of the SNA in a nuclear war. Taking into account the existing correlation of forces between the United States and Russia in the field of strategic weapons, the American military-political leadership believes that the goals in a nuclear war can be achieved as a result of multiple and spaced nuclear strikes against objects of military and economic potential, administrative and political control. In time, it can be both proactive and reciprocal actions.

  The following types of nuclear strikes are envisaged: selective - to destroy various command and control agencies, limited or regional (for example, against enemy troop groups in the course of a conventional war if the situation develops unsuccessfully) and massive. In this regard, a certain reorganization of the US START was carried out. A further change in American views on the possible development and use of strategic nuclear weapons can be expected at the beginning of the next millennium.