Improved performance in long-pulse ELMy H-mode plasmas with internal transport barrier in JT-60U

Oyama, Naoyuki; Isayama, Akihiko; Suzuki, Takahiro; Koide, Yoshihiko; Takenaga, Hidenobu; Ide, Shunsuke; Nakano, Tomohide; Asakura, Nobuyuki; Kubo, Hirotaka; Takechi, Manabu; Sakamoto, Yoshiteru; Kamada, Yutaka; Urano, Hajime; Yoshida, Maiko; Tsuzuki, Kazuhiro*; Matsunaga, Go; Gormezano, C.*; JT-60 Team

After installation of ferritic steel tiles (FSTs) which reduced fast ion losses due to toroidal field ripple, the performance of long-pulse ELMy H-mode plasmas was improved in terms of sustained duration time for both high normalized beta () and high thermal confinement enhancement factor ( $H_{98}$ ). High 2.3 together with $H_{98}$ 1 was sustained for 23.1s (12 $tau_{rm R}$ ) $q_{rm 95} sim 3.3$ , which also provide high $beta_{rm N}H_{rm H98(y,2)} ge 2.2$ , which is higher than ITER reference scenario. These long-pulse plasmas are possible candidates for ITER hybrid operation scenario.

Language	:	English
Journal	:	Proceedings of 21st IAEA Fusion Energy Conference (FEC 2006) (CD-ROM)
Volume	:
Number	:
Pages	:	8 Pages
Publication Year/Month	:	2007/03
Meeting title	:	21st IAEA Fusion Energy Conference (FEC 2006)
Held date	:	2006/10
Location (city)	:	Chengdu
Location (country)	:	China
Patent information	:
PDF	:
Paper URL	:	http://www-naweb.iaea.org/napc/physics/FEC/FEC2006/html/node15.htm#2139
DOI for research data	:
Keywords	:	no keyword
Research Facility	:	JT-60(臨界プラズマ試験装置)
Press Release	:
Article of JAEA R&D Review	:
Cooperating Institute	:

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Registration No. : BB20061966
JAEA Abstracts No. : 35000679
Paper Submission No. : 2168

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