Investigation of LHCD Efficiency and Transformer Recharging in the EAST Tokamak
Investigation of LHCD Efficiency and Transformer Recharging in the EAST Tokamak
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DOI：
10.1088/1009-0630/14/3/04
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发表时间：
2012-03
影响因子：
1.7
通讯作者：
Li Miaohui;Ding Bojiang;L. Wenke;Kong Erhua;Shan Jiafang;Liu Fukun;Wang Mao;Xu Handong
中科院分区：
文献类型：
--
作者：
Li Miaohui;Ding Bojiang;L. Wenke;Kong Erhua;Shan Jiafang;Liu Fukun;Wang Mao;Xu Handong
利用热电导率理论和实验公式研究了EAST装置限制器和偏滤器结构的低杂波电流驱动效率。结果表明偏滤器结构的电流驱动效率略高于限制器结构。为了解释实验结果，GENRAY程序被应用于计算低杂波（LHW）在不同配置中的传播和吸收。数值计算结果表明，两种结构的平行折射率（N//）相差很大。Transformer充电实验也在EAST上成功进行。用Karney-Fisch方法计算了LHW的吸收系数α和折射率上移因子β。此外，在偏滤器配置中，EAST的最大充电效率约为4%，线平均电子密度为ne_av = 0.7 × 1019 m−3。
The efficiency of lower hybrid current drive (LHCD) for limiter and divertor configurations in the EAST tokamak is investigated using hot electrical conductivity theory and experimental formulas. The results indicate that the efficiency of current drive in divertor geometry is slightly higher than that in limiter one. To interpret the experimental results, the GENRAY code is applied to calculate the propagation and absorption of the lower hybrid wave (LHW) in different configurations. The numerical results show that the variation in the parallel refractive index (N//) between the two configurations is quite large. Transformer recharging experiments were also successfully conducted in EAST. By means of the Karney-Fisch method, the absorption index (α) and the upshift factor of refraction (β) for the LHW are obtained. In addition, the maximum recharging efficiency in EAST is about 4% in the divertor configuration, with a line-averaged electron density of ne_av = 0.7 × 1019 m−3.