ICRF fast wave current drive and mode conversion current drive in EAST tokamak
ICRF fast wave current drive and mode conversion current drive in EAST tokamak
复制标题
EAST 托卡马克中的 ICRF 快波电流驱动和模式转换电流驱动
DOI：
10.1063/1.5002137
复制
发表时间：
2017
影响因子：
2.2
通讯作者：
Chen Y.
中科院分区：
文献类型：
--
作者：
Yin L.;Yang C.;Gong X. Y.;Lu X. Q.;Du D.;Chen Y.
离子回旋共振频率（ICRF）范围内的快波是无感电流驱动（CD）的一个很有前途的候选源，它对托卡马克的长脉冲和高性能运行至关重要。采用耦合全波方法和Ehst-Karney参数化方法，对实验先进超导托卡马克（EAST）中ICRF快波电流驱动（FWCD）和模转换电流驱动（MCCD）进行了数值研究。结果表明，FWCD的效率在两个频率区域都是显著的，f ≥ 85 MHz和f = 50-65 MHz，有效避免了离子回旋吸收，单位功率最大轴上驱动电流可达120 kA/MW。由于快波模式转换的原因，CD效率对少数离子浓度的敏感性得到了证实，MCCD效率在少数离子浓度为22%时达到峰值。研究了波发射位置和环形波数对电流驱动效率的影响。
Fast wave in the ion-cyclotron resonance frequency (ICRF) range is a promising candidate for non-inductive current drive (CD), which is essential for long pulse and high performance operation of tokamaks. A numerical study on the ICRF fast wave current drive (FWCD) and mode-conversion current drive (MCCD) in the Experimental Advanced Superconducting Tokamak (EAST) is carried out by means of the coupled full wave and Ehst-Karney parameterization methods. The results show that FWCD efficiency is notable in two frequency regimes, i.e., f ≥ 85 MHz and f = 50–65 MHz, where ion cyclotron absorption is effectively avoided, and the maximum on-axis driven current per unit power can reach 120 kA/MW. The sensitivity of the CD efficiency to the minority ion concentration is confirmed, owing to fast wave mode conversion, and the peak MCCD efficiency is reached for 22% minority-ion concentration. The effects of the wave-launch position and the toroidal wavenumber on the efficiency of current drive are also investigated.