Theory of synergy between electron cyclotron and lower hybrid waves
Theory of synergy between electron cyclotron and lower hybrid waves
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DOI：
10.1063/1.1739234
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发表时间：
2003-12
影响因子：
2.2
通讯作者：
R. Dumont;G. Giruzzi
中科院分区：
文献类型：
--
作者：
R. Dumont;G. Giruzzi
从理论上研究了电子回旋电流驱动(ECCD)效率在低杂波驱动区的提高。采用摄动法求解伴随方程，得到了在碰撞效应占主导地位的极限情况下的响应函数。提出了一种替代的处理方法，包括朗之万方程的数值解，以深入了解当前的驱动机制并验证所获得的结果。证明了两波之间存在交叉效应，并确定了协同作用的条件(即，在存在LH光的情况下，ECCD效率显著提高)。
A theoretical study of the improvement of the electron cyclotron current drive (ECCD) efficiency in regimes in which most of the current is driven by lower hybrid (LH) waves is presented. A perturbation technique is employed to solve the adjoint equation and derive the response function including both collisional and LH effects in the limit where the former dominate. An alternative treatment of the problem, involving a numerical solution of the Langevin equations, is proposed to gain insight into the current drive mechanism and to confirm the obtained results. The existence of a cross-effect between the two waves is demonstrated and the conditions for the synergy (i.e., significant enhancement of the ECCD efficiency in the presence of LH power) are identified.