Effects of edge collisionality on ELM characteristics in the grassy ELM regime

Oyama, Naoyuki; Kojima, Atsushi; Aiba, Nobuyuki; Horton, L. D.*; Isayama, Akihiko; Kamiya, Kensaku; Urano, Hajime; Sakamoto, Yoshiteru; Kamada, Yutaka; JT-60 Team

The effect of the edge collisionality on ELM characteristics has been investigated in the grassy ELM regime on JT-60U. Both in high and low regimes ( $q_{95} > 6$ and $q_{95} sim 4.3$ ), ELM amplitude becomes higher in plasmas with high edge collisionality. This collisionality dependence is opposite to the dependence observed in type I ELM regime, where the ELM amplitude decreases with increasing the edge collisionality. This collisionality dependence is favorable for next step devices such as ITER.

Language	:	English
Journal	:	Nuclear Fusion
Volume	:	50
Number	:	6
Pages	:	p.064014_1 - 064014_10
Publication Year/Month	:	2010/06
Meeting title	:	12th International Workshop on "H-mode Physics and Transport Barriers"
Held date	:	2009/09
Location (city)	:	Princeton
Location (country)	:	U.S.A.
Patent information	:
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Paper URL	:	https://doi.org/10.1088/0029-5515/50/6/064014
DOI for research data	:	Link to research data related to this paper/report.
Keywords	:	no keyword
Research Facility	:	JT-60(臨界プラズマ試験装置)
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Web of Science® Times Cited Count	:	Times Cited Count： If you would like to get the latest times cited, please access the Web of Science®. http://www.webofknowledge.com/wos
InCites™	:	Percentile:67.79 Category:Physics, Fluids & Plasmas
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Registration No. : BB20092075
JAEA Abstracts No. : 38001187
Paper Submission No. : 7840

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