カーボンシートポンプのGAMMA10における性能評価 [in Japanese] Evaluation of Carbon Sheet Pump in the GAMMA 10 Tandem Mirror [in Japanese]
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Carbon sheet pump (CSP) is developed for reduction of hydrogen recycling in fusion plasma devices. A small scale test module has been made for the GAMMA 10 tandem mirror and exposed to charge exchange fast neutrals from hotion plasmas (5 keV). Pressure difference between the case with exposure of CSP to fast neutrals (CSP-on) and another case without exposure (CSP-off) is observed reproductively, in which clearly shows the pumping effect of CSP. The life time of CSP is estimated to be 2000 sec, or 10000 shots in GAMMA 10. Pumping efficiency of CSP estimated from the time evolution of total pressure measured in the test module is about 0.50.8. Thermal desorption experiments show that 2060% of trapped hydrogen is released by direct joule heating up to 800°C. Partial pressure of impurities during CSP-on and CSP-off are measured. No change of the impurity pressure was observed in the hot-ion plasmas. It is confirmed that CSP is applicable to actual plasma devices.
- Journal of the Vacuum Society of Japan
Journal of the Vacuum Society of Japan 43(7), 734-740, 2000-07-20
The Vacuum Society of Japan