a soda can. The energy in such a capacitor would be ·C·V, which for the above-mentioned capacitor is 12.5 J. (By comparison, a defibrillator delivers ~200 J from 2 kV and perhaps 20 µF. The flash-strobe in a disposable camera is typically 3 J from a 300 V capacitor of 100 µF.) In a fission bomb, the same or similar circuit is used for powering the neutron trigger, the initial source of fission neutrons. See also Nuclear weapon design - Implosion-type weapon Triggering sequence References External links Elements of Fission Weapon Design, section 4.1.6.2.2.6 Detonators Nuclear weapon design