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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 《中国物理快报》2009,26(3):159-162
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. 相似文献
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