Periodic injector with a porous pellet mold for introducing fuel into plasmas

A ten-barrel pneumatic injector for periodic introduction of fuel pellets into steady-state thermonuclear experiments has been developed. Solid hydrogen pellets with diameters of 2.7 mm and lengths of 3 to 4 mm are formed in each barrel at a rate of 0.1–0.2 Hz with periodic pulsed heating of a porous insert, which is continuously filled with hydrogen and cooled with liquid helium, and accelerated to 1–1.2 km/s. Zh. Tekh. Fiz. 69, 35–39 (May 1999)