Title of article
ICRF long-pulse discharge and interaction with a chamber wall and antennas in LHD
Author/Authors
Saito، نويسنده , , K. and Mutoh، نويسنده , , T. and Kumazawa، نويسنده , , R. and Seki، نويسنده , , T. UEDA-NAKAMURA، نويسنده , , Y. and Ashikawa، نويسنده , , N. and Sato، نويسنده , , K. and Shoji، نويسنده , , M. and Masuzaki، نويسنده , , S. and Watari، نويسنده , , T. and Ogawa، نويسنده , , H. and Takeuchi، نويسنده , , H. and Kasahara، نويسنده , , H. and Shimpo، نويسنده , , F. and Nomura، نويسنده , , G. and Yokota، نويسنده , , M. and Takahashi، نويسنده , , C. and Komori، نويسنده , , A. and Zhao، نويسنده , , Y. S. Yoon، نويسنده , , J.S. and Kwak، نويسنده , , J.G.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2007
Pages
6
From page
1323
To page
1328
Abstract
During long-pulse discharges by minority ion cyclotron range of frequencies (ICRF) heating (majority: He++ and minority: H+) in the large helical device (LHD), phenomena of hot spots on antenna side protectors, localized divertor plate temperature increase and sparks from inner side of torus were observed. Plasma duration time was limited by the gradual or sudden density increase. The gradual density increase was due to outgassing from the graphite divertor plates or antenna side protectors with hot spots. The spark resulted in sudden density increase. It is thought that the localized divertor plate temperature increase and sparks are attributed to the high-energy ions accelerated in front of ICRF antennas. By suppressing these phenomena the world largest input energy was achieved.
Keywords
52.40.Fd , 52.40.Hf , 52.50.Qt , ICRF , RF , Outgassing , Steady state , LHD
Journal title
Journal of Nuclear Materials
Serial Year
2007
Journal title
Journal of Nuclear Materials
Record number
1365264
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