Electron cyclotron heating and current drive in the TJ-II stellarator
Electron cyclotron heating and current drive in the TJ-II stellarator
复制标题
TJ-II 仿星器中的电子回旋加热和电流驱动
DOI：
10.1088/0741-3335/40/12/010
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发表时间：
1998
影响因子：
2.2
通讯作者：
B. Milligen
中科院分区：
文献类型：
--
作者：
V. Tribaldos;J. Jimenez;J. Guasp;B. Milligen
电子回旋共振加热（ECRH）不仅作为一种加热机制，而且作为一种诊断工具和一种通过电子回旋电流驱动（ECCD）产生可控电流的方法，在当今的聚变实验中已成为一种有吸引力的技术。在本文中，我们将展示，使用光线跟踪模拟，如何可以解决所有这些问题的ECRH系统设计的TJ-II仿星器。该ECRH装置由两个500千瓦的回旋管在f = 53.2 Ghz耦合到等离子体通过两个准光传输线，放置在两个仿星器对称的位置，并配备了一个内部转向镜。使用三维（3D）的哈密顿射线追踪代码，TRECE，几乎完全单通吸收与本地化的功率沉积被发现为轴上和轴外加热的任何磁性配置。模拟还表明，它是可能的，以诱导一个可观的ECCD，尽管小的斜入射角可达到与可移动的镜子，因为磁场的方向和强度的快速变化的环向角在TJ-II。
Electron cyclotron resonance heating (ECRH) has become an attractive technique in today's fusion experiments not only as a heating mechanism but also as a diagnostic tool and a way to induce controllable currents through electron cyclotron current drive (ECCD). In this paper we show, using ray tracing simulations, how one can address all these issues with the ECRH system designed for the TJ-II stellarator. This ECRH set up consists of two 500 kW gyrotrons at f = 53.2 Ghz coupled to the plasma through two quasi-optical transmission lines, placed at two stellarator symmetric positions, and equipped with an internal steerable mirror. Using the three-dimensional (3D) Hamiltonian ray tracing code, TRECE, almost full single-pass absorption with localized power deposition is found for both on- and off-axis heating for any magnetic configuration. The simulations also show that it is possible to induce an appreciable ECCD despite the small oblique incidence angles attainable with the movable mirrors because of the rapid variation of the magnetic field direction and strength with the toroidal angle in TJ-II.