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  2. Castle Bravo - Wikipedia

    en.wikipedia.org/wiki/Castle_Bravo

    Castle Bravo was the first in a series of high-yield thermonuclear weapon design tests conducted by the United States at Bikini Atoll, Marshall Islands, as part of Operation Castle. Detonated on 1 March 1954, the device remains the most powerful nuclear device ever detonated by the United States and the first lithium deuteride -fueled ...

  3. History of the Teller–Ulam design - Wikipedia

    en.wikipedia.org/wiki/History_of_the_Teller...

    The fact that a large proportion of the yield of a thermonuclear device stems from the fission of a uranium 238 tamper (fission-fusion-fission principle) was revealed when the Castle Bravo test "ran away," producing a much higher yield than originally estimated and creating large amounts of nuclear fallout. [13]

  4. History of nuclear fusion - Wikipedia

    en.wikipedia.org/wiki/History_of_nuclear_fusion

    The first successful man-made fusion device was the boosted fission weapon tested in 1951 in the Greenhouse Item test. The first true fusion weapon was 1952's Ivy Mike, and the first practical example was 1954's Castle Bravo. In these devices, the energy released by a fission explosion compresses and heats the fuel, starting a fusion reaction.

  5. Nuclear fusion - Wikipedia

    en.wikipedia.org/wiki/Nuclear_fusion

    Nuclear fusion–fission hybrid (hybrid nuclear power) is a proposed means of generating power by use of a combination of nuclear fusion and fission processes. The concept dates to the 1950s, and was briefly advocated by Hans Bethe during the 1970s, but largely remained unexplored until a revival of interest in 2009, due to the delays in the ...

  6. Nuclear weapons testing - Wikipedia

    en.wikipedia.org/wiki/Nuclear_weapons_testing

    In 1954 the Castle Bravo fallout plume spread dangerous levels of radiation over an area over 100 miles (160 km) long, including inhabited islands. Atomic and nuclear tests can involve many hazards. Some of these were illustrated in the US Castle Bravo test in 1954. The weapon design tested was a new form of hydrogen bomb, and the scientists ...

  7. Russia releases secret footage of 1961 'Tsar Bomba' hydrogen ...

    www.aol.com/news/2020-08-28-russia-releases...

    The Tsar Bomba far surpassed the largest explosion the United States has ever conducted - a 15-megaton "Castle Bravo" hydrogen bomb detonated on Bikini Atoll in 1954. (Reporting by Maria Vasilyeva ...

  8. Thermonuclear weapon - Wikipedia

    en.wikipedia.org/wiki/Thermonuclear_weapon

    The fission reactions though, especially the last fission reactions, release a tremendous amount of fission products and fallout. If the last fission stage is omitted, by replacing the uranium tamper with one made of lead , for example, the overall explosive force is reduced by approximately half but the amount of fallout is relatively low.

  9. Nuclear testing at Bikini Atoll - Wikipedia

    en.wikipedia.org/wiki/Nuclear_testing_at_Bikini...

    The second series of tests in 1954 was codenamed Operation Castle. The first detonation was Castle Bravo, which tested a new design utilizing a dry-fuel thermonuclear bomb. It was detonated at dawn on March 1, 1954. Scientists miscalculated: the 15 Mt of TNT nuclear explosion far exceeded the expected yield of 4–8 Mt of TNT (6 predicted). [6]