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

作　　者：丁斯晔 万宝年 王璐 提昂 张新军 刘子奚 钱金平 钟国强 段艳敏 

机构地区：[1]Institute of Plasma Physics, Chinese Academy of Sciences [2]College of Electrical and Electronic Engineering,Huazhong University of Science and Technology

出　　处：《Plasma Science and Technology》2014年第9期826-832,共7页等离子体科学和技术（英文版）

基　　金：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)

摘　　要：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.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.

关 键 词：relectron energy pinch ICRF off-axis heating TRANSP code GLF23 model 

分 类 号：O532[理学—等离子体物理]