托卡马克等离子体不同平衡位形下的电子回旋波电流驱动  

Electron Cyclotron Current Drive in Tokamak Plasma with Different Equilibrium Configuration

作　　者：钟翊君 龚学余[1] 李新霞[1] 李景春[1] ZHONG Yijun GONG Xueyu LI Xinxia LI Jingchun(School of Nuclear Science and Technology, University of South China, Hengyang 421001, China)

机构地区：[1]南华大学核科学技术学院,湖南衡阳421001

出　　处：《计算物理》2016年第4期447-452,共6页Chinese Journal of Computational Physics

基　　金：国际热核聚变实验堆计划专项(2014GB108002);国家自然科学基金(11375085);南华大学研究生创新课题(2015xcx27);湖南省教育厅项目(14C0965)资助

摘　　要：在给定的等离子体总电流和中心电流密度条件下,数值求解平衡方程,求出不同拉长比和三角形变因子的托卡马克等离子体温度、密度、磁场分布,然后通过求解波迹方程和Fokker-Planck方程,分别计算这些位形下的电子回旋波波迹和电流驱动.结果表明:电子回旋波X模从顶部发射时,随着拉长比的增大,波迹会向弱场侧偏移.电子回旋波X模从弱场侧发射时,电子回旋波在等离子体中传播沉积的功率份额随着拉长比的增大而增加,驱动电流位置随着三角形变因子的增大向等离子体中心移动.驱动电流位置随环向和极向发射角的减小向中心移动,对应的电流密度峰值也变大.With given total toroidal current and central current density of plasma, temperature, density and magnetic field profiles of tokamak plasma with different elongation and triangularity are obtained numerically with Grad-Shafranov equation. Electron cyclotron wave ray trajectories and current drive in configurations are investigated with Fokker-Planck equation incorporated into a ray tracing code. It shows that as electron cyclotron wave of X-mode are launched from top, rays propagate toward low-field side with increasing elongation. As electron cyclotron wave are launched from mid-plane and low-field-side, high quotient power deposition is obtained with greater elongation, and driven current profile is close to central plasma with increase of triangularity. Current drive profile moves toward central plasma and peak current density increases with decreasing poloidal or toroidal injection angle.

关 键 词：电子回旋波 波迹 电流驱动 

分 类 号：O53[理学—等离子体物理]