Observation of Electron Energy Pinch in HT-7 ICRF Heated Plasmas

DING Siye(丁斯晔); WAN Baonian(万宝年); WANG Lu(王璐); TI Ang(提昂); ZHANG Xinjun(张新军); LIU Zixi(刘子奚); QIAN Jinping(钱金平); ZHONG Guoqiang(钟国强); DUAN Yanmin(段艳敏)

doi:10.1088/1009-0630/16/9/04

Plasma Science and Technology > 2014 > 16(9): 826-832. > DOI: 10.1088/1009-0630/16/9/04

DING Siye(丁斯晔), WAN Baonian(万宝年), WANG Lu(王璐), TI Ang(提昂), ZHANG Xinjun(张新军), LIU Zixi(刘子奚), QIAN Jinping(钱金平), ZHONG Guoqiang(钟国强), DUAN Yanmin(段艳敏). Observation of Electron Energy Pinch in HT-7 ICRF Heated Plasmas[J]. Plasma Science and Technology, 2014, 16(9): 826-832. DOI: 10.1088/1009-0630/16/9/04

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Observation of Electron Energy Pinch in HT-7 ICRF Heated Plasmas

1 Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China 2 College of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

Funds: supported by National Natural Science Foundation of China (Nos.10725523, 10990212, 11021565, 11075181 and 11105177), in part by National Magnetic Confinement Fusion Science Program of China (Nos.2010GB104001, 2011GB101001, 2011GB101004, 2011GB107001, 2012GB101000, 2013GB107003 and 2013GB112002)

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Received Date: April 02, 2013

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Abstract

Abstract

Inward energy transport (pinch phenomenon) in the electron channel is observed in HT-7 plasmas using off-axis ion cyclotron resonance frequency (ICRF) heating. Experimental results and power balance transport analysis by TRANSP code are presented in this article. With the aids of GLF23 and Chang-Hinton transport models, which predict energy diffusivity in experimental conditions, the estimated electron pinch velocity is obtained by experimental data and is found reasonably comparable to the results in the previous study, such as Song on Tore Supra. Density scanning shows that the energy convective velocity in the electron channel has a close relation to density scale length, which is qualitatively in agreement with Wang’s theoretical prediction. The parametric dependence of electron energy convective velocity on plasma current is still ambiguous and is worthy of future research on EAST.
- relectron energy pinch,
- ICRF off-axis heating,
- TRANSP code,
- GLF23 model

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References (14)

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