Journal of Plasma and Fusion Research
Print ISSN : 0918-7928
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A Comparison between Divertor Heat Loads in ELMy and HRS H-Modes on JFT-2M
Hisato KAWASHIMAKazuya UEHARANobuhiro NISHINOKensaku KAMIYAKazuhiro TSUZUKIBakhtiari MOHAMMADYoshihiko NAGASHIMAHiroaki OGAWAKatsumichi HOSHINOSadaaki SUZUKIYoshinori KUSAMA
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2004 Volume 80 Issue 11 Pages 907-908

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Abstract

A comparison between divertor heat loads in ELMy and High Recycling Steady (HRS) H-modes was carried out by fast measurements of the two dimensional Dα emission, and the divertor electron temperature and ion saturation current on JFT-2M. The heat load for the HRS H-mode was maintained at the same level as the time-averaged heat load for the ELMy H-mode, indicating that the HRS H-mode has the attractive advantage of avoiding the severe ELM heat load. An enhancement of particle transport dominated the heat load for the HRS H-mode, whereas the large ELM heat load was induced by abrupt increases of both heat and particle transport.

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© 2004 by The Japan Society of Plasma Science and Nuclear Fusion Research
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