A neutral beam line pump with helium cryotrapping capability
Abstract
The paper presents a neutral beamline cryopump developed to cryodense hydrogen and cryotrap helium separately or simultaneously. The pump will be used for a direct conversion experiment to be installed on the neutral beam test stand; its location between the direct converter electrodes and the neutral beam dump will maintain low pressure sufficient for efficient collection of the energetic beam ions. The specific pumping speed for hydrogen and helium are given, and the area of the chevron baffle provides a maximum throughput of 16 torr-liters/s of hydrogen and 4 torr-liters/s of helium at 0.0001 torr. The design and development details and operational characteristics of the pump are given, concluding that continuous argon cryotrapping is a practical large scale method for all gases including helium and hydrogen
- Publication:
-
Fusion technology 1978
- Pub Date:
- 1979
- Bibcode:
- 1979fute.conf..745B
- Keywords:
-
- Cryopumping;
- Cryotrapping;
- Helium;
- Neutral Beams;
- Argon;
- Gas Flow;
- Hydrogen;
- Performance Tests;
- Pressure Measurement;
- Engineering (General)