【作者】 李景春； 龚学余； 路兴强； 王亮；

【Author】 LI Jing-chun;GONG Xue-yu;LU Xing-qiang;WANG Liang;School of Nuclear Science and Technology,University of South China;

【机构】 南华大学核科学技术学院；

【摘要】 采用直接变分方法,开发了基于能量原理的等离子体平衡方程求解程序。将此程序与Ray-tracing程序进行耦合,数值研究了电子回旋波在HL-2A非圆截面托卡马克等离子体中的功率吸收和电流驱动。结果表明:EC波的单次吸收随环向发射角增大而降低,当极向发射角为180°时,0.5 MW/68 GHz O1-mode和1 MW/140 GHz X2-mode的单次吸收随环向角的变化相似,环向发射角小于10°时,单次吸收都在98.3%以上;环向发射角在20°时,0.5 MW/68GHz O1-mode和1 MW/140 GHz X2-mode的驱动效率均达到最大值,分别为0.029×10²⁰A/（W·m²）,0.020×10²⁰A/（W·m²）。电流驱动效率随密度增大反而降低。等离子体温度升高,电流驱动效率增大,相比X2模,O1模受温度影响更为显著。更多还原

【Abstract】 A procedure is developed to solve the plasma equilibrium equation by using a direct variational method based on an energy principle.Coupling the procedure to our self-developed ray-tracing code,numerical study of electron cyclotron wave(ECW) power absorption and current drive has been performed in non-circular HL-2A Tokamak plasma.Numerical results show that the single pass absorption decreases with increasing toroidal injection angle.For the 0.5 MW/68 GHz 01-mode and 1 MW/140 GHz X2-mode of ECW,the single pass absorption varied with the change of toroidal angle is similar and the single pass absorption of both waves could reach 98.3%as long as the toroidal injection angle is less than 10° when the poloidal injection angle is launched at 180°.The optimized EC current drive(CD) efficiency saturates at approximately 0.029 for 0.5 MW/68 GHz Ol-mode and 0.020 for 1 MW/140 GHz X2-mode launched from the plasma midplane at a toroidal injection angle of 20°.The CD efficiency decreases with increasing plasma density and increases with increasing plasma temperature.Compared to X2-mode,the CD efficiency of Ol-mode depend on plasma temperature is stronger.更多还原