Study of Discharge Cleaning Process in JIPP T-II Torus by Residual Gas Analyzer
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概要
- 論文の詳細を見る
During discharge cleaning, it has been observed that decay time of water-vapor pressure changes when the pressure reaches a certain level. A long decay time observed in the later phase can be interpreted as a result of a slow deoxidization rate of chromium oxide, which may dominate the cleaning process in this phase. Optimization of plasma density for the cleaning is discussed comparing the experimental results on density dependence of water-vapor pressure with a result based on a zerodimentional calculation for particle balance. One of the essential points for effective cleaning is found to be raising electron density of the plasma high enough that the dissociation loss rate of H_2O is as large as the sticking loss rate. A density as high as 10^<11> cm^<-3> is required for a clean surface condition where sticking probability is presumed to be around 0.5.
- 核融合科学研究所の論文
著者
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Hiroe S.
Research Information Center Institute Of Plasma Physics Nagoya University
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Noda N.
Research Information Center, Institute of Plasma Physics, Nagoya University
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Tanahashi S.
Research Information Center, Institute of Plasma Physics, Nagoya University
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Taniguchi Y.
Research Information Center, Institute of Plasma Physics, Nagoya University
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Hirokura S.
Research Information Center Institute Of Plasma Physics Nagoya University
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Noda N.
Research Information Center Institute Of Plasma Physics Nagoya University
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Tanahashi S.
Research Information Center Institute Of Plasma Physics Nagoya University
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Tanaka S.
Department Of Physics Faculty Of Science Kyoto University
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