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[55] [56] In January 2016, North Korea claimed to have successfully tested a hydrogen bomb, [57] although only a magnitude 5.1 seismic event was detected at the time of the test, [58] a similar magnitude to the 2013 test of a 6–9 kt (25–38 TJ) atomic bomb. These seismic recordings cast doubt upon North Korea's claim that a hydrogen bomb was ...
Beginning with the Teller–Ulam breakthrough in March 1951, there was steady progress made on the issues involved in a thermonuclear explosion and there were additional resources devoted to staging, and political pressure towards seeing, an actual test of a hydrogen bomb. [6]: 137–139 A date within 1952 seemed feasible.
SHRIMP used lithium deuteride (LiD), which is solid at room temperature; Ivy Mike used cryogenic liquid deuterium (D 2), which required elaborate cooling equipment. Castle Bravo was the first test by the United States of a practical deliverable fusion bomb , even though the TX-21 as proof-tested in the Bravo event was not weaponized.
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 ...
Because U-238 is plentiful and has no critical mass, it can be added in (in theory) almost unlimited quantities as a tamper around a fusion bomb, helping contain the fusion reaction and contributing its own fission energy. For example, the fast-fission of the U-238 tamper contributed 77% (8.0 megatons) to the yield of the 10.4 Mt Ivy Mike ...
The value of an egg-shaped primary lies apparently in the fact that a MIRV warhead is limited by the diameter of the primary—if an egg-shaped primary can be made to work properly, then the MIRV warhead can be made considerably smaller yet still deliver a high-yield explosion—a W88 warhead manages to yield up to 475 kt with a reentry vehicle ...
The detonation produced a crater 1.9 km (6,200 ft) in diameter and 50 m (160 ft) deep where Elugelab had once been; [9] the blast and water waves from the explosion (some waves up to 6.1 m (20 ft) high) stripped the test islands clean of vegetation, as observed by a helicopter survey within 60 minutes after the test, by which time the mushroom ...
After Truman ordered the crash program to develop the hydrogen bomb in January 1950, the Boston Daily Globe published a cutaway description of a hypothetical hydrogen bomb with the caption Artist's conception of how H-bomb might work using atomic bomb as a mere "trigger" to generate enough heat to set up the H-bomb's "thermonuclear fusion" process.