ignition charge

He checked the small ignition charge and set the timer for ten minutes.

The post-firing review found that a failure of the foil in the ignition charge vented ignition gases via the igniter, as well as into the propellant.

The HPM concept is based on work from the 1950s, when the University of California Radiation Laboratory (currently the Lawrence Livermore National Laboratory) required a small nuclear fission device as the ignition charge for a thermonuclear weapon.

The Catalogue, The National Archives An important discovery was that including magnesium alloy turnings (the waste product of machining with a lathe) with the main charge at the rear of the barrel would give reliable ignition without the necessity of a separate ignition charge and its associated wiring.