Finite Larmor radius effects on ripple diffusion in tokamaks

被引：4
|
作者：
Mimata, H. [1 ]
Tani, K. [2 ]
Tobita, K. [2 ]
Tsutsui, H. [1 ]
Tsuji-Iio, S. [1 ]
Shimada, R. [1 ]
机构：
[1] Tokyo Inst Technol, Meguro Ku, Tokyo 1528550, Japan
[2] Japan Atom Energy Agcy, Naka, Ibaraki 3110193, Japan
来源：
PROGRESS IN NUCLEAR ENERGY | 2008年 / 50卷 / 2-6期
关键词：
tokamak; ST; alpha-particle; ripple; diffusion;
D O I：
10.1016/j.pnucene.2007.11.071
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
The confinement of alpha particle is important in tokamaks. The trajectory or confinement of alpha particles is often calculated with guiding center approximation. The features of spherical tokamak can break the approximation. We investigate finite Larmor radius effect. The orbit calculated by equation of motion is different, especially in toroidal direction, from that by guiding center equations. This difference causes difference of ripple resonance energy and the difference of the peaks of the diffusion coefficients. Furthermore, because of the additional free parameter, Larmor phase, the peaks of diffusion coefficient calculated by equation of motion are broader than those by guiding center equations. (C) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码：638 / 642
页数：5
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