Electron temperature fluctuation in the HT-7 Tokamak plasma observed by electron cyclotron emission imaging |
| |
| Authors: | Xu Xiao-Yuan Wang Jun Yu Yi Wen Yi-Zhi Yu Chang-Xuan Liu Wan-Dong Wan Bao-Nian Gao Xiang N. C. Luhmann C. W. Domier Jian Wang Z. G. Xia Zuowei Shen |
| |
| Affiliation: | Chinese Academy of Sciences (CAS) Key Laboratory of Plasma Physics, Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China; Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China; Department of Applied Science, University of California, Davis CA 95616, USA |
| |
| Abstract: | ![]()
The fluctuation of the electron temperature has been measured byusing the electron cyclotron emission imaging in the Hefei Tokamak-7(HT-7) plasma. The electron temperature fluctuation with a broadbandspectrum shows that it propagates in the electron diamagnetic driftdirection, and the mean poloidal wave-number $bar{k}_theta $ iscalculated to be about 1.58,cm$^{-1}$, or$bar{k}_thetarho_sapprox 0.34$. It indicates that thefluctuation should come from the electron drift wave turbulence. Thelinear global scaling of the electron temperature fluctuation withthe gradient of electron temperature is consistent with the mixinglength scale qualitatively. Evolution of spectrum of the fluctuationduring the sawtooth oscillation phases is investigated, and thefluctuation is found to increase with the gradient of electrontemperature increasing during most phases of the sawtoothoscillation. The results indicate that the electron temperaturegradient is probably the driver of the fluctuation enhancement. Thesteady heat flux driven by electron temperature fluctuation isestimated and compared with the results from power balanceestimation. |
| |
| Keywords: | electron temperaturefluctuation electron cyclotron emission imaging Tokamak |
| 本文献已被 维普 等数据库收录！ |
| 点击此处可从《中国物理 B》浏览原始摘要信息 |
|
点击此处可从《中国物理 B》下载免费的PDF全文 |
|
