Effects of Plasma Density and Toroidal Magnetic Field on Lower Hybrid Current Drive Efficiency on HT-7 Tokamak
Effects of Plasma Density and Toroidal Magnetic Field on Lower Hybrid Current Drive Efficiency on HT-7 Tokamak
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DOI：
10.1088/0256-307x/17/7/020
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发表时间：
2000-07
影响因子：
3.5
通讯作者：
Ding Bojiang;Kuang Guangli;Liu Yue-xiu;Liu Deng-cheng;Zheng Guang-hua;Wu Jun-shuan;Liu Fukun;Shen Wei-ci;Lin Jian-an;Yang Chun-sheng;Xu Handong;Yu Jia-wen;Huang Yiyun;Shang Lian-quan;Shi Yuejiang;Wu Zhenwei;Z. Jinsong;Ying Fu-xian;Z. Xiaodong;Liu Xiaoning;Xie Ji-kang;Wan Yuan-xi
中科院分区：
文献类型：
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作者：
Ding Bojiang;Kuang Guangli;Liu Yue-xiu;Liu Deng-cheng;Zheng Guang-hua;Wu Jun-shuan;Liu Fukun;Shen Wei-ci;Lin Jian-an;Yang Chun-sheng;Xu Handong;Yu Jia-wen;Huang Yiyun;Shang Lian-quan;Shi Yuejiang;Wu Zhenwei;Z. Jinsong;Ying Fu-xian;Z. Xiaodong;Liu Xiaoning;Xie Ji-kang;Wan Yuan-xi
在HT-7装置上进行了低杂波电流驱动实验，扫描参数为：中心线平均电子密度（ne = 0.6 - 2.0 × 10 ~（19）m ~（-3））和环向磁场（Bt = 1.62 - 2.0T）。研究了这些参数对电流驱动效率的影响，得到了电流驱动效率随ne和Bt的变化曲线。从这些实验结果可以看出，电流驱动效率随着环向磁场的增加而增加。随着等离子体密度的增加，电流驱动效率首先增加到一定值，然后逐渐降低，即存在一个优化的密度区域，在该区域可以获得更好的驱动效率。分析表明，电流驱动效率主要受波可达性和杂质浓度的影响，这两个因素的竞争决定了电流驱动效率。
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 × 1019 m-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.