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Oct 13 – 18, 2014
Hotel Park Inn Pribaltiyskaya
Europe/Moscow timezone

High Power ICRF Systems and Heating Experiments in EAST

Oct 15, 2014, 8:30 AM
4h
Green 8-9 (Hotel Park Inn Pribaltiyskaya)

Green 8-9

Hotel Park Inn Pribaltiyskaya

Saint Petersburg, Russian Federation
Poster Poster 3

Speaker

Dr Xinjun Zhang (Institute of Plasma Physics Chinese Academy of Sciences (ASIPP))

Description

The ICRF system of 12.0 MW has been developed for EAST. To support the long pulse operation over 1000s, the ICRF heating system is upgraded with active cooling, especially for ICRF antenna systems. The ICRF system of 6.0MW has been operating in the 2012 experimental campaign. A new 6.0 MW system has been successfully commissioned at full power on water dummy load. In the upcoming campaign,the ICRF system is capable of delivering more than 10 MW of rf power to the plasma. The relevant experimental results from the upcoming campaign will be given. Heating power modulation experiments using ion cyclotron resonance heating (ICRH) in the Hydrogen minority scheme have been performed in the 2012 campaign of the EAST. The power deposition profile in the ion cyclotron range of frequencies (ICRF) has been investigated experimentally. The D (H) minority heating scheme provides a dominant localized ion heating. In this scheme, electron heating occurs only through collisions with the minority ion tail. The results shows that the peak of the experimental power deposition profile is always occurred around to ω=ωcH. The global energy confinement time was calculated in the ICRF modulation experiment, and compared with the scaling law, ITER-89. It was found that the calculated results coincided with ITER scaling law. The global energy confinement time decreases by a factor of 2 approximately from that in Ohmic plasmas with the ICRF heating power increases up to 1.6 MW. The heating efficiency was somewhat lower than expected. The effect on the sawtooth period was demonstrated in the experiments analyzed in this paper.
Country or International Organisation China
Paper Number EX/P3-3

Primary author

Dr Xinjun Zhang (Institute of Plasma Physics Chinese Academy of Sciences (ASIPP))

Co-authors

Dr Baonian Wan (Institute of Plasma Physics, Chinese Academy of Sciences) Dr Franz Braun (Max-Planck Institute for Plasma Physics, D-85748, Garching, Germany) Dr Hiroshi Kasahara (National Institute for Fusion Science) Prof. Jean-Marie Noterdaeme (Max-Planck Institute for Plasma Physics, D-85748, Garching, Germany) Prof. Jiangang Li (Institute of Plasma Physics, Chinese Academy of Sciences) Dr Lingfeng Lu (CEA, IRFM, F-13108 Saint-Paul Lez Durance, France) Dr Liqun Hu (Institute of Plasma Physcis, Chinese Academy of Sciences) Prof. Ryuhei Kumazawa (National Institute for Fusion Science, Toki, 509-5292 Japan) Stephen Wukitch (MIT PSFC) Prof. Xianzu Gong (Insititute of Plasma Physics, Chinese Academy Sciences) Prof. Yanping Zhao (Insitute of Plasma Physics Chinese Academy of Sciences) Dr Yijun Lin (MIT Plasma Science and Fusion Center) Prof. Yuntao Song (Institute of Plasma Physics Chinese Academy of Sciences) Prof. Yuzhou Mao (Institute of Plasma Physics Chinese Academy of Sciences)

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