Abstract
A pneumatic injector for periodic injection of fuel—solid-deuterium pellets—into the plasma of the TORE-SUPRA tokamak in a steady-state mode is described. Injection of deuterium pellets with an unlimited duration is ensured by a screw extruder in which gaseous deuterium is frozen and squeezed outwards in the form of a rod with a rectangular cross section. A cutter installed on the injector’s barrel cuts a cylinder with a diameter of 2 mm and a length of 1.0–3.5 mm out from this rod. The movement of the cutter is controlled by a pulsed electromagnetic drive at a pulse repetition rate of 10 Hz. In the injector’s barrel, a compressed gas accelerates a deuterium pellet to a velocity of 100–650 m/s.
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