22 Nov 1955 Jahr - USSR tests hydrogen bomb

Beschreibung:

https://www.departments.bucknell.edu/russian/Site-prior-to-Easyweb-migration/chrono3.html

Four days later, on August 12, 1953, the RDS-6s test, the first test of a Soviet thermonuclear device, took place.

The test, which became known as Joe-4 (this had been the fourth Soviet nuclear explosion whose occurrence was announced by the United States), took place at the Semipalatinsk test site and yielded roughly 400 kilotons of TNT. The explosion took place on a tower; the purpose of this was to reduce the fallout hazard which would be created as a result of the explosion. The test vaporized the steel tower and left a massive crater in its place. The area surrounding the crater was covered in a “yellow lumpy glass” which became thinner from the epicenter.

A U.S. panel, led by Hans Bethe, assessed radioactive material gathered after the test and argued that it did not constitute a “true” hydrogen bomb, concluding that the fusion reactions in the device were responsible for no more than 20% of its power. Though Joe-4 produced a significantly smaller yield than the Mike Shot or Bravo Test in the American thermonuclear test series, the Soviets argued that this weapon was ready for immediate use and could be delivered by a bomber. On November 22, 1955, the Soviets detonated their first megaton-range hydrogen bomb, RDS-37. As historian Alex Wellerstein notes, Sakharov identified that test in his memoirs as a turning point in his journey from nuclear weapons designer to prominent dissident.
^ https://ahf.nuclearmuseum.org/ahf/history/soviet-hydrogen-bomb-program/

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