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The Mike shot of Operation Ivy on October 31, 1952 was the first hydrogen bomb. It used cryogenic liquid deuterium-tritium as the fusion fuel and had a yield of 10.4 megatons (8 megatons of this was from fast fission of the uranium tamper).

The device itself, nicknamed "Sausage", measured 80 inches (2.03 m) in diameter and 244 inches (6.19 m) in height and weighed about 54 tons, its outer steel wall was 10 to 12 inches thick.

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9y ago

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