Numerical studies of electron cyclotron wave current drive on HL-2A tokamak
Numerical studies of electron cyclotron wave current drive on HL-2A tokamak
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DOI：
10.1063/1.4923303
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发表时间：
2015-06
影响因子：
2.2
通讯作者：
Jingchun Li;X. Gong;J. Dong;P. Zheng;S. Song;Q. Gao;D. Du
中科院分区：
文献类型：
--
作者：
Jingchun Li;X. Gong;J. Dong;P. Zheng;S. Song;Q. Gao;D. Du
采用一种新的射线追迹法和Fokker-Planck程序，对HL-2A装置的电子回旋波（ECW）电流驱动（CD）进行了数值研究。该程序与其他经过良好测试的线性和准线性程序进行了基准测试，并用于研究HL-2A托卡马克上的电子回旋电流驱动。波的传播，功率沉积，和驱动电流剖面。电子捕获的效果也进行了评估。结果表明，在目前的ECW功率水平下，准线性效应可以忽略不计，当两种波都以20°角入射到等离子体赤道面上时，HL-2A的CD效率在0.5 MW/68 GHz的一次谐波普通（O 1）和1 MW/10 GHz的一次谐波普通（O2）下分别为10.029 × 1020 A/W/m2和10.020 × 1020 A/W/m2时饱和。140 GHz的二次谐波非寻常（X2）模式。等离子体密度，温度，和波发射位置上的驱动电流的影响也进行了研究的解析和数值。
The electron cyclotron wave (ECW) current drive (CD) for the HL-2A tokamak is investigated numerically with a new ray-tracing and Fokker-Planck code. The code is benchmarked with other well-tested linear and quasilinear codes and is then used to study the electron cyclotron current drive on the HL-2A tokamak. The wave propagation, power deposition, and driven-current profiles are presented. The effect of electron trapping is also assessed. It is found that quasilinear effects are negligible at the present ECW power levels and that when both waves are injected at an angle of 20° on the plasma equatorial plane, the CD efficiency for the HL-2A saturates at ∼0.029 × 1020 A/W/m2 and ∼0.020 × 1020 A/W/m2 for the 0.5 MW/68 GHz first harmonic ordinary (O1) and 1 MW/140 GHz second harmonic extraordinary (X2) modes, respectively. The effects of the plasma density, temperature, and wave-launching position on the driven current are also investigated analytically and numerically.