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Repetitive pellet injector with screw extruder was designed as a pellet injector test stand for continuous long term operation. It is a pneumatic 1-barrel gas gun for injection of frozen hydrogen or deuterium pellets with 2 Hz repetition rate . A new technology of the steady-state continuous pellet formation and injection has been developed using a screw extruder. The screw extruder operates with small amount of fuel and provides continuous refill of the fuel consumption in the pellet injection mode. It can also form mixed solid pellets using different fuel gases. Cryogenic system is based on a helium flowing cryostat. |
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Propellant gas |
helium |
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Gas pressure |
10 MPa |
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Extrusion speed |
2 ÷ 50 mm/s |
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Pellet material |
hydrogen, deuterium |
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Pellet size |
Ø 2×2 mm |
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Pellet velocity |
1.5 km/s |
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Repetition rate |
2 Hz |
