Numerical investigation of effect of trapped electrons on current drive

NUCLEAR FUSION AND PLASMA PHYSICS ›› 2010, Vol. 30 ›› Issue (1): 7-11.

• Plasma Physics • Previous Articles Next Articles

Numerical investigation of effect of trapped electrons on current drive

YAO Kun, ZHAO Yan-ping, ZHANG Xin-jun

(Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031)

Received:2009-02-12 Revised:2009-09-10 Online:2010-03-15 Published:2010-05-11
About author:姚琨(1982-)，男，湖北武汉人，博士研究生，主要从事波与等离子体相互作用的研究。

捕获电子效应对电流驱动影响的数值研究

姚琨，赵燕平，张新军

(中国科学院等离子体物理研究所，合肥 230031)

通讯作者: 姚琨(1982-)，男，湖北武汉人，博士研究生，主要从事波与等离子体相互作用的研究。

Abstract

Abstract: A 2-D Fokker-Planck equation in the effect of trapped electrons on current drive is revised with bounce average and solved by alternate direction implicit scheme. Effect of trapped electrons on current drive is calculated in different quasi-linear diffusion coefficients or different resonant regions. Numerical investigation shows that the effect of trapped electrons on current drive is negligible in plasma core. Effect of trapped electron on current drive is not improved well by enhancing diffusion coefficient or shifting resonant region.

Key words: Trapped electrons, Current drive, Bounce average

摘要： 在考虑到捕获电子效应的情况下，对求解二维Fokker-Planck方程的编程进行了反弹平均的修改，使用了交替方向隐式法来求解方程。分析和计算了在不同扩散系数和不同共振区间的情况下，捕获电子效应对驱动电流的影响。结果显示：随着逆纵横比的增加驱动电流密度有明显的下降，在磁轴附近捕获电子效应对电流驱动影响很小；提高波功率并不能很好的改善捕获电子效应对电流驱动的影响；右移共振区间提高共振电子的速度，也不能很好的改善捕获电子效应对电流驱动的影响。所得结果与理论分析基本一致。

关键词: 捕获电子, 电流驱动, 反弹平均

CLC Number:

TL61 ⁺ 2.3

YAO Kun, ZHAO Yan-ping, ZHANG Xin-jun. Numerical investigation of effect of trapped electrons on current drive[J]. NUCLEAR FUSION AND PLASMA PHYSICS, 2010, 30(1): 7-11.

姚琨, 赵燕平, 张新军. 捕获电子效应对电流驱动影响的数值研究[J]. 核聚变与等离子体物理, 2010, 30(1): 7-11.

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Numerical investigation of effect of trapped electrons on current drive

捕获电子效应对电流驱动影响的数值研究

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