Home / Store / Journals / Electronic Articles / Fusion Science and Technology / Volume 60 / Number 4
S. Kasahara, K. Katayama, T. Fujiki, S. Ishikawa, S. Fukada, M. Nishikawa
Fusion Science and Technology
Volume 60 / Number 4 / November 2011 / Pages 1487-1490
Format:electronic copy (download)
Tritium retention in carbon deposition is known to be a serious problem in a fusion reactor. In the present study, co-deposition behavior of carbon and hydrogen was investigated by using methane-hydrogen mixed plasma. It has been shown that formation of the carbon deposition was suppressed at temperatures higher than 150 °C. However, a small amount of carbon deposition was observed even at a high temperature of 300 °C. From mass balance calculation, it was estimated that a majority of carbon decomposed in the plasma was transported to the vacuum pumping system.
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