The drift reversal capability in quasi-axisymmetric stellarators

被引：3
|
作者：
Masayuki, Y [1 ]
Kimitaka, I [1 ]
Shoichi, O [1 ]
Keisuke, M [1 ]
机构：
[1] Natl Inst Fus Sci, Toki 5095292, Japan
来源：
NUCLEAR FUSION | 2002年 / 42卷 / 09期
关键词：
D O I：
10.1088/0029-5515/42/9/307
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
The drift reversal capability of trapped particles has been investigated in quasi-axisymmetric (QA) configurations for the confinement improvement as has been experimentally demonstrated in other axisymmetric configurations. The properties of J (second adiabatic invariance), its profile and maximum-J capability are examined for this purpose. Due to the non-axisymmetric nature of the magnetic field strength, a region of local maximum of J is created to cause the drift reversal. This region can be controlled radially and also toroidally with the introduction of symmetric breaking components of B, externally. The increase of magnetic shear in finite beta equilibria also has a favourable effect on the drift reversal. Thus, maximum-J capability and its external controllability are demonstrated for QA stellarators, by which the impact of magnetic configuration on turbulent transport can be studied.
引用
收藏
页码：1094 / 1101
页数：8
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