Operation Ranger
United States tests
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thermonuclear bombs
- In nuclear weapon: Gun assembly, implosion, and boosting
American tests during Operation Ranger in early 1951 included implosion devices with cores containing a fraction of a critical mass—a concept originated in 1944 during the Manhattan Project. Unlike the original Fat Man design, these “fractional crit” weapons relied on compressing the fissile core to a higher density…
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