Active Edge Control by LID for Steady State Plasmas
Active Edge Control by LID for Steady State Plasmas
复制标题
通过 LID 进行主动边缘控制以实现稳态等离子体
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
Motojima Osamu
中科院分区：
文献类型：
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作者：
Morisaki Tomohiro;Masuzaki Suguru;Suzuki Hajime;Nishimura Kiyohiko;Hayashi Hiromi;Y. Hiroaki;Komori Akio;Ohyabu Nobuyoshi;Motojima Osamu
数值模拟研究了带电粒子和中性粒子在LID构型中的行为，并在LHD中进行了初步实验。对于带电粒子，场线跟踪代码与随机游走过程相结合，模拟扩散，提供LID头上的撞击点图案。结果表明，粒子能够识别并跟随扩散系数小于0.1m2lsec的岛状结构，即LID作为偏滤器工作良好，且头部没有前缘问题，而前缘问题在稳态运行时将成为严重问题。另一方面，LID的作用类似于扩散系数大于0.1 m2/sec的常规限制器。对于中性粒子，利用二维蒙特卡罗程序（DEGAS）计算了LID的泵浦效率，结果表明，在低再循环操作下，可以获得np至50 Vo的效率。
Numerical simulations to study the charged and neutral particle behavior in the LID configuration have been performed with preliminary experiments in LHD. For charged particles, a field line tracing code coupled with the random walk process, simulating the diffusion, provides striking point patterns on the LID head. It is found that particles can identify and follow the island structure with the diffusion coefficient less than 0.1 m2lsec, i.e. LID works well as a divertor, and the head is free from its leading edge problem which will turn into severe issue in the steady state operation. On the other hand, LID acts like a conventional limiter with the diffusion coefficient larger than 0.1 m2lsec. For neutral particles,2D Monte Carlo code (DEGAS) is utilized to calculate pumping efficiency of LID, and it is shown that efficiency np to 5OVo can be achieved in the low recycling operation.