低混杂波高N‖分量对EAST等离子体电流驱动的影响  

Effect of Lower Hybrid Wave Current Drive with High Component N‖on EAST

作　　者：刘祖光 李新霞[1,2] 杨明 LIU Zuguang;LI Xinxia;YANG Ming(School of Nuclear Science and Technology,University of South China,Hengyang,Hunan 421001,China;Institute of Plasma Physics,Chinese Academy of Sciences,Hefei,Anhui 230031,China)

机构地区：[1]南华大学核科学技术学院,湖南衡阳421001 [2]中国科学院等离子体物理研究所,安徽合肥230031

出　　处：《计算物理》2020年第4期467-472,共6页Chinese Journal of Computational Physics

基　　金：国家重点研发计划(2017YFE0300406);国家自然科学基金(11775108)资助项目。

摘　　要：EAST等离子体高约束模运行条件下,在等离子体边缘区域观测到明显的等离子体电流带.在EAST托卡马克装置非圆截面平衡位形下,使用射线追踪方法研究低混杂波高平行折射率N‖分量对电流驱动的影响.结果表明:当-8≤N‖≤-6时,平行折射率分量能够在小半径(0.7<r/a<1)区域驱动kA量级的等离子体电流.对于具有台基区、等离子体边缘温度更高的电子温度剖面,驱动电流的位置r/a>0.9.低混杂波朗道阻尼的理论分析与数值模拟结果一致.另外,高N‖低混杂波在等离子体边缘的功率沉积和电流驱动与电子温度分布和发射谱分布相关.In EAST tokamak high confinement mode discharge,a plasma current belt was found experimentally at the edge plasmas region.For EAST plasma with non-circular cross-section equilibrium configuration,effect of high parallel refractive index N‖component of lower hybrid wave on current drive was numerically studied.Results of the ray-tracing platform shows that kA plasma current emerges in a region of normalized radius from 0.7 to 1.0 for 6≤N‖≤8.For electron temperature profile with pedestal and higher plasma edge temperature,the region of drive current is r/a>0.9.A theoretical analysis of lower hybrid Landau damping in EAST tokamak was also performed.Effects of electron density profile and formation of lower hybrid wave spectrum on current drive were discussed.

关 键 词：低混杂波电流驱动 托卡马克 等离子体电流 

分 类 号：O532[理学—等离子体物理]