Light elements behavior in fusion devices studied with JT-60 and oxygen discharge

Konishi, Satoshi*; Nakamura, Hirofumi; Isobe, Kanetsugu; Yamamoto, Yasushi*; Kaminaga, Atsushi

In order to understand the behavior of hydrogen isotopes, carbon, and oxygen in the fusion devices, and to develop effective method to control codeposite and tritium inventory, exhaust gas from JT-60 was analyzed. Unsaturated hydrocarbons such as acetylene was found in tokamak exhaust, suggesting relation with codeposite formation. Oxygen-helium glow discharge in JT-60 indicated enhanced carbon removal corresponding to sputtering yield of 2.5 for carbon per oxygen ion. Simulating discharge experiment in a small chamber with carbon electrodes also reproduced codeposition by acetylene discharge and its removal by O $_{2}$ -He glow.

Language	:	English
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Meeting title	:	17th ANS Topical Meeting on the Technology of Fusion Energy (TOFE 2006)
Held date	:	2006/11
Location (city)	:	Albuquerque
Location (country)	:	U.S.A.
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Keywords	:	no keyword
Research Facility	:	JT-60(臨界プラズマ試験装置)
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Article of JAEA R&D Review	:
Cooperating Institute	:	京都大学

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Registration No. : BB20062245
JAEA Abstracts No. :
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