Synergy effects during current drive by two lower-hybrid waves
Synergy effects during current drive by two lower-hybrid waves
复制标题
两个较低混合波电流驱动期间的协同效应
DOI：
10.1063/1.4977524
复制
发表时间：
2017
影响因子：
2.2
通讯作者：
Hu Ye Min
中科院分区：
文献类型：
--
作者：
Yang Youlei;Xiang Nong;Hu Ye Min
近年来在先进超导托卡马克装置上进行的低杂波电流驱动实验中，采用了从不同位置同时发射两个具有不同相速度的低杂波来驱动等离子体电流的方法。为了理解两个LH波的协同效应，基于Fuchs模型获得电子速度分布的解析表达式[Fuchs等人，Phys. Fluids 28（12），3619-3628（1985）]，这与通过使用CQL 3D代码数值求解准线性方程得到的结果[R. W.哈维和M. G.麦考伊，在原子能机构热核等离子体模拟和建模进展技术委员会会议记录中，加拿大蒙特利尔（1992年）]。并通过解析方法得到了协同因子。结果表明，两个共振区的存在可以使更多的共振电子与波相互作用，而垂直动力学可以通过提高有效电子温度来进一步增强协同效应。
In recent lower-hybrid current drive experiments on the experimental advanced superconducting tokamak, two lower-hybrid waves are launched simultaneously from different locations with different phase velocities to drive the plasma current. To understand the synergy effects of the two LH waves, the analytical expression for the electron velocity distribution is obtained based on Fuchs' model [Fuchs et al., Phys. Fluids 28(12), 3619–3628 (1985)], which is in good agreement with that obtained by solving the quasi-linear equation numerically via the CQL3D code [R. W. Harvey and M. G. McCoy, in Proceedings of IAEA Technical Committee Meeting on Advances in Simulation and Modeling of Thermonuclear Plasmas, Montreal, Canada (1992)]. The synergy factor is also obtained analytically. It is found that the existence of two resonant regions may bring more resonant electrons interacting with each wave and the perpendicular dynamics can further enhance the synergy effect by increasing the effective electron temperature...