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Effects of Plasma Density and Toroidal Magnetic Field on Lower Hybrid Current Drive Efficiencv on HT-7 Tokamak 被引量:1
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作者 DING Bo-jiang KUANG Guang-li +19 位作者 LIU Yue-xiu LIU Deng-Cheng ZHENG Guang-hua WU Jun-Shuan LIU Fu-kun SHEN Wei-ci LIN Jian-An YANG Chun-sheng XU Han-Dong YU Jia-Wen HUANG Yi-yun shang lian-quan SHI Yue-Jiang WU Zhen-wei ZHANG Jin-Song YIN Fu-Xian ZHANG Xiao-Dong LIU Xiao-ning XIE Ji-Kang WAN Yuan-Xi 《Chinese Physics Letters》 SCIE CAS CSCD 2000年第7期519-521,共3页
Lower hybrid current drive experiments on the HT-7 device have been carried out by scanning the following parameters: central line averaged electron density (ne = 0.6 - 2.0 × 1019m-3) and toroidal magnetic field ... Lower hybrid current drive experiments on the HT-7 device have been carried out by scanning the following parameters: central line averaged electron density (ne = 0.6 - 2.0 × 1019m-3) and toroidal magnetic field (Bt = 1.62 - 2.0 T). The dependence of current drive efficiency on these parameters has been studied and the experimental curves of current drive efficiency as a function of ne and Bt have also been obtained. From these experimental results, it can be seen that current drive efficiency rises with the increase of toroidal magnetic field. As plasma density increases, the current drive efficiency first increases to a certain value, then gradually decreases, that is, there exists an optimized density regime where a better drive efficiency can be obtained. The analysis shows that the current drive efficiency is mainly affected by wave accessibility and impurity concentration, and the competition of these two factors determines the current drive efficiency. 展开更多
关键词 DENSITY PLASMA LOWER
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Lower Hybrid Current Drive Effects on HT-7 Superconducting Tokamak
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作者 KUANG Guang-li XU Wei-hua +17 位作者 ZHANG Xiang-qin SHAN Jia-fang LIU Yue-xiu LIU Deng-cheng ZHENG Guang-hua LIU Fu-kun LIN Jian-an WU Jun-shuan JIN Qian-chun DING Bo-jiang YANG Chun-sheng ZHOU Yuan-wei shang lian-quan XU Han-dong FAN Heng-yu FANG Yu-de XIE Ji-kang WAN Yuan-xi 《Chinese Physics Letters》 SCIE CAS CSCD 1998年第6期435-437,共3页
Lower hybrid current drive(LHCD)experiments have been done on the superconducting Tokamak HT-7 by using a new developed long pulse megawatt lower hybrid wave system.An LHCD efficiency of 0.5×10^(19)A·m^(-2)/... Lower hybrid current drive(LHCD)experiments have been done on the superconducting Tokamak HT-7 by using a new developed long pulse megawatt lower hybrid wave system.An LHCD efficiency of 0.5×10^(19)A·m^(-2)/W in a pulse length of several hundreds of milliseconds has been achieved.After boronization of the tokamak vacuum vessel,considerable improvements of plasma energy confinement and particle confinement during LHCD phase have been achieved by adjusting wave spectra.An energy transfer from the lower hybrid wave to plasma bulk electrons has been demonstrated experimentally.A computer simulation of the LHCD experiments by using a ray tracing code combined with a two dimensional Fokker-Planck code is in good accordance with experimental measurements and suggests an important role of plasma current profile. 展开更多
关键词 WAVE hundreds ENERGY
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