The meandering orbit effect on stabilization of the tilting instability in a field‐reversed configuration
The meandering orbit effect on stabilization of the tilting instability in a field‐reversed configuration
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曲折轨道对场反转配置中倾斜不稳定性稳定性的影响
DOI：
10.1063/1.859579
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发表时间：
1990
期刊：
影响因子：
--
通讯作者：
Tetsuya Sato
中科院分区：
文献类型：
--
作者：
R. Horiuchi;Tetsuya Sato
通过三维粒子模拟研究了场反转配置的倾斜破坏中的离子动力学效应。研究发现，当 s≊1 时，倾斜干扰被完全抑制，其中 s 测量磁分线和零场线之间的径向距离上的离子陀螺半径的数量。在零场线周围形成长条形磁阱，其中离子不进行旋转而是沿着零场线蜿蜒运动。对于 s≊1 的情况，磁阱中存在大量离子，并在绕主轴的稳定轨道上运动，平均旋转速度几乎等于热速度的一半。当s变得大于1时，磁阱中的离子数量减少并且稳定化效果降低。还发现，由于曲折轨道的各向异性，离子热压分布产生了各向异性，并且电场波动始终保持在较低水平，因此...
The ion kinetic effect in the tilt disruption of a field‐reversed configuration is investigated by means of a three‐dimensional particle simulation. It is found that the tilt disruption is completely suppressed when s≊1, where s measures the number of ion gyroradii over the radial distance between the magnetic separatrix line and the field‐null line. A prolate magnetic well is formed around the field‐null line, in which ions do not execute gyration but meander along the field‐null line. For the case of s≊1 a large number of ions exist in the magnetic well and move on stable orbits around the major axis with an average rotation velocity nearly equal to half the thermal velocity. As s becomes larger than 1, the number of ions in the magnetic well decreases and the stabilization effect is reduced. It is also found that an anisotropy is created in the ion thermal pressure profile owing to the anisotropy of the meandering orbits and that the electric field fluctuation always remains at a low level, and thu...