An injector of solid tritium pellets (as well as those of deuterium and protium) satisfying the basic requirements of the ITER tokamak is developed. The main elements of the injector are a screw extruder ensuring the continuous formation of pellets from a solid thermonuclear fuel and a fuel duct compatible with tritium handling and environmental safety requirements. The design, technological, and performance characteristics of the injector are presented. The results of experimental adjustment of the extrusion and protium-pellet pneumatic acceleration modes are described. A solid-protium rod with a rectangular cross section of 3 × 4 mm{sup}2 was continuously extruded at a temperature of 10-11 K for 1500 s at a velocity of 20-25 mm/s. Pellets with a size of 3-3.5 mm formed from the red were accelerated by helium at a pressure of I MPa up to a speed of 300-500 m/s in the periodic mode at a frequency of 1-6 Hz.
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