Beam line studies of the JT-60 neutral beam injector
Abstract
A small-scale cryopump has been built for studying the operation of neutral beam line injectors for a fusion reactor. The cryopump, capable of a speed of 6000 liters/sec, consists of a pair of liquid-helium-cooled panels, chevrons cooled by liquid nitrogen, and radiation shields. In addition, heat stress to the cryopanels arising from fast-ion reflection from the beam dump is investigated; energy reflection coefficients for hydrogen ions impacting on Mo, Cu, stainless steel and Al plates are obtained. Surface damage to polycrystalline Mo by bombardment of fast hydrogen beams is also studied.
- Publication:
-
7th Symposium on Engineering Problems of Fusion Research
- Pub Date:
- 1977
- Bibcode:
- 1977epfr.conf..544S
- Keywords:
-
- Cryopumping;
- Fusion Reactors;
- Neutral Beams;
- Reactor Design;
- Molybdenum;
- Polycrystals;
- Reflectance;
- Surface Properties;
- Toroidal Plasmas;
- Plasma Physics