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May 26, 1955
Proposal Concerning the Testing of an Experimental System for the Verification of the Casing Design
Proposal to develop a test warhead using radiation implosion to induce a thermonuclear reaction. The proposal emphasizes that the device will be compatible with the existing R-7 ICBM delivery system.
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June 10, 1955
Central Intelligence Agency Information Report, 'The Development of an Ultra-Centrifuge at the Nuclear Institute of Manfred von Ardenne in Sinop'
CIA report describing the construction process of ultra-centrifuges in the Soviet nuclear institute of Sinop and the personnel working there.
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June 30, 1955
Letter from Iu. B. Khariton to N. I. Pavlov Regarding the Testing of a Nuclear Weapon at Object 700
The letter describes geographic, safety, and technical considerations taken into account when selecting a test site for the RDS-37 hydrogen bomb. Specifically, the letter highlights that a testing field should be chosen based on the existence of population centers, the terrain, and the main wind patterns.
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August 24, 1955
Report by N.M Emanuel, 'Regarding the Nature of the Fallout Path of the Hydrogen Bomb Detonated on 1 March 1954 at Bikini [Atoll]'
Report by N.M. Emanuel on the U.S. Castle Bravo test in the Marshall Islands. The report surmises from fallout data that the bomb used a fission-fusion-fission design, and that the bomb contained a larger than normal amount of fissile material which induced a thermonuclear reaction.
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1956
South African Cabinet Memorandum, Research in the Field of Nuclear Energy and Exchanging Information with Friendly Nations
South African Cabinet memorandum discussing the potential for nuclear cooperation and technology assistance from various friendly countries, including the United States, Great Britain, and the Netherlands.
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January 15, 1956
Request by the Chinese leadership to the Soviet Leadership for Help in Establishing a Chinese Nuclear Program
Request by Chinese leaders to the Soviet leadership for technical and scientific aid in establishing a nuclear program in the People's Republic of China, including exchange programs for Chinese scientists, building of scientific labs in China, and providing specialized education for Chinese students.
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February 02, 1956
Note Containing an Assessment of the Parameters of a Device with Yields of 150 Megatons and One Billion Tons of TNT
A report on the material requirements and design specifications of nuclear devices with yields of 150MT and one milliard tons TNT between Soviet officials. Specifically, the use of lithium-6 deuteride and natural uranium in varying degrees is discussed.