60th anniversary of signing a nuclear test ban treaty by The United States, the United Kingdom, and the Soviet Union (Harold Macmillan 1894–1986; Edward Teller 1908–2003; John F. Kennedy 1917–1963) Background info: Foam plasma mechanism firing sequence: A. Warhead before firing; primary (fission bomb) at top, secondary (fusion fuel) at bottom, all suspended in polystyrene foam. B. High-explosive fires in primary, compressing plutonium core into supercriticality and beginning a fission reaction. C. Fission primary emits X-rays that are scattered along the inside of the casing, irradiating the polystyrene foam. D. Polystyrene foam becomes plasma, compressing secondary, and plutonium sparkplug begins to fission. E. Compressed and heated, lithium-6 deuteride fuel produces tritium (3H) and begins the fusion reaction. The neutron flux produced causes the 238U tamper to fission. A fireball starts to form.
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