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核聚变与等离子体物理 ›› 2008, Vol. 28 ›› Issue (1): 6-10.

• 等离子体物理学 • 上一篇    下一篇

边界高密度下低杂波耦合的数值模拟

秦永亮,丁伯江,张立智,匡光力   

  1. (中国科学院等离子体物理研究所,合肥 230031 )
  • 收稿日期:2007-03-23 修回日期:2007-09-12 出版日期:2008-03-15 发布日期:2011-04-07
  • 作者简介:秦永亮(1981-),男,河南省安阳市人,2004年毕业于河南大学物理系,博士研究生,研究方向为非圆截面下低杂波与等离子体的相互作用。
  • 基金资助:

    国家自然科学基金资助项目(10575104)

Numerical simulation of lower hybrid wave coupling to plasma on high density edge

QIN Yong-liang, DING Bo-jiang, ZHANG Li-zhi, KUANG Guang-li   

  1. (Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031)
  • Received:2007-03-23 Revised:2007-09-12 Online:2008-03-15 Published:2011-04-07

摘要:

采用STEP+RAMP的模型模拟低杂波与等离子体耦合。在该模型中,等离子体边界密度一开始就处于一个比较高的值(大于截

止密度)。通过真空区、密度平台区以及密度梯度区域波动方程的求解,应用边界电磁场连续性条件和阻抗匹配条件,得到了低

杂波的功率反射系数和耦合功率谱,验证了波与等离子体耦合的最佳条件,并在满足最佳耦合和相位差恒定条件下,对

STEP+RAMP模型和Brambilla理论的耦合结果进行了比对。

关键词: 密度平台, 波耦合, 数值模拟

Abstract:

The “step plus ramp model” has been accepted to calculate the coupling of lower hybrid wave with plasma, in which the edge plasma density is assumed to be higher (large than the cut-off density) in the front. The reflected power coefficient and the power spectrum of lower hybrid wave have been validated by solving the wave equation in the areas of vacuum, density plateau and density gradient, respectively, under the conditions of electromagnetic continuity and impedance matching at the edge. The optimal coupling condition of lower hybrid wave with plasma has been explored, and the results obtained from “step plus ramp model” and Brambilla theory has been discussed.

Key words: Density plateau, Wave coupling, Numerical simulation

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