| Observation of E×B Flow Velocity Profile Change Using Doppler Reflectometry in HL-2A |
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| 引用本文： | 肖维文,邹晓岚,丁玄同,董家齐,刘泽田,宋绍栋,高亚东,姚良骅,冯北滨,宋显明,陈程远,孙红娟,李永高,杨青巍,严龙文,刘仪,段旭如,潘传红,刘永.Observation of E×B Flow Velocity Profile Change Using Doppler Reflectometry in HL-2A[J].中国物理快报,2009,26(3):159-162. |
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| 作者姓名： | 肖维文 邹晓岚 丁玄同 董家齐 刘泽田 宋绍栋 高亚东 姚良骅 冯北滨 宋显明 陈程远 孙红娟 李永高 杨青巍 严龙文 刘仪 段旭如 潘传红 刘永 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos 10335060 and 10805015. |
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| 摘 要： | A broadband, O-mode sweeping Doppler reflectometry designed for measuring plasma E×B flow velocity profiles is operated in HL-2A. The main feature of the Doppler reflectometry is its capability to be tuned to any selected frequency in total waveband from 26-40 GHz. This property enables us to probe several plasma layers within a short time interval during a discharge, permitting the characterization of the radial distribution of plasma fluctuations. The system allows us to extract important information about the velocity change layer, namely its spatial localization. In purely Ohmic discharge a change of the E×B flow velocity profiles has been observed in the region for 28 〈 r 〈 30cm if only the line average density exceeds 2.2×10^19 m^-3. The density gradient change is measured in the same region, too.
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| 关 键 词： | 等离子体 放电量 测量方法 密度 |
| 收稿时间： | 2008-11-18 |
Observation of E×B Flow Velocity Profile Change Using Doppler Reflectometry in HL-2A |
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| XIAO Wei-Wen,ZOU Xiao-Lan,DING Xuan-Tong,DONG Jia-Qi,LIU Ze-Tian,SONG Shao-Dong,GAO Ya-Dong,YAO Liang-Hua,FENG Bei-Bin,SONG Xian-Ming,CHEN Cheng-Yuan,SUN Hong-Juan,LI Yong-Gao,YANGQing-Wei,YAN Long-Wen,LIU Yi,DUAN Xu-Ru,PAN Chuan-Hong,LIU Yong.Observation of E×B Flow Velocity Profile Change Using Doppler Reflectometry in HL-2A[J].Chinese Physics Letters,2009,26(3):159-162. |
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| Authors: | XIAO Wei-Wen ZOU Xiao-Lan DING Xuan-Tong DONG Jia-Qi LIU Ze-Tian SONG Shao-Dong GAO Ya-Dong YAO Liang-Hua FENG Bei-Bin SONG Xian-Ming CHEN Cheng-Yuan SUN Hong-Juan LI Yong-Gao YANGQing-Wei YAN Long-Wen LIU Yi DUAN Xu-Ru PAN Chuan-Hong LIU Yong |
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| Affiliation: | Southwestern Institute of Physics, PO Box 432, Chengdu 610041Association Euratom-CEA, CEA/DSM/IRFM,CEA/Cadarache, 13018 S Paul-les-Durance, France |
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| Abstract: | A broadband, O-mode sweeping Doppler reflectometry designed for measuring plasma E×B flow velocity profiles is operated in HL-2A. The main feature of the Doppler reflectometry is its capability to be tuned to any selected frequency in total waveband from 26-40GHz. This property enables us to probe several plasma layers within a short time interval during a discharge, permitting the characterization of the radial distribution of plasma fluctuations. The system allows us to extract important information about the velocity change layer, namely its spatial localization. In purely Ohmic discharge a change of the E×B flow velocity profiles has been observed in the region for 28<r<30cm if only the line average density exceeds 2.2×1019m-3. The density gradient change is measured in the same region, too. |
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| Keywords: | 52 25 Fi |
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