Wave induced ion transport in ICRH tokamak plasmas
Wave induced ion transport in ICRH tokamak plasmas
复制标题
ICRH 托卡马克等离子体中的波诱导离子传输
DOI：
10.1088/0029-5515/29/7/002
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发表时间：
1989
期刊：
影响因子：
3.3
通讯作者：
W. Core
中科院分区：
文献类型：
--
作者：
W. Core
本文研究了ICRH等离子体中的波致共振离子输运问题。首先导出描述组态空间径向输运的扩散系数，并建立反弹平均的Fokker-Planck方程。然后，利用多时间尺度方法，得到了共振离子密度的扩散方程。扩散方程数值求解的参数适合的JET托卡马克。结果表明，在高功率输入和长加热时间（t > τs）条件下，放电中心共振离子明显减少，热核反应性降低，加热效率下降。
The problem of wave induced resonant ion transport in ICRH tokamak plasmas is considered. A diffusion coefficient which describes the transport in the radial dimension in configuration space is first derived and a bounce averaged Fokker-Planck equation formulated. Then, using the method of multiple time-scales, a diffusion equation for the resonant ion density is obtained. The diffusion equation is numerically solved for parameters appropriate to the JET tokamak. The results indicate that for high RF power input and long heating times (t > τs) there is a significant depletion of resonant ions from the centre of the discharge, a reduction in thermonuclear reactivity and a degradation in heating efficiency.