INITIATOR BOOSTER

A miniature initiator booster for an energy transmission system having a minimum of size, weight and production cost. It includes a unitary body with a longitudinal passage defined by an internal cylindrical wall at the body ends and an intermediate enlarged annulus substantially filled with propellant pellets that surround predetermined small apertures in the sidewall of a hot gas transmitting flash tube. The central portion of the flash tube is blocked with an integral transverse wall to direct the inlet hot gas into the propellant containing annulus for ignition of the booster propellant and release of the booster gas through the sidewall apertures in a manner to satisfy the system requirements.