Isomon instabilities driven by energetic ions in Wendelstein 7-X

被引：8

作者：

Kolesnichenko, Ya. I. ^{[1
]}

Koenies, A. ^{[2
]}

Lutsenko, V. V. ^{[1
]}

Drevlak, M. ^{[2
]}

Turkin, Yu. ^{[2
]}

Helander, P. ^{[2
]}

机构：

[1] Inst Nucl Res, Prospekt Nauky 47, UA-03028 Kiev, Ukraine

[2] Max Planck Inst Plasma Phys, Wendelsteinstr 1, D-17491 Greifswald, Germany

来源：

NUCLEAR FUSION | 2016年 / 56卷 / 06期

关键词：

stellarator; instabilities; energetic particles; eigenmodes; Alfven waves; plasma compressibility; confinement of energetic ions; OPTIMIZED STELLARATORS; HELIAS REACTOR; MODES; PLASMAS;

D O I：

10.1088/0029-5515/56/6/066004

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：

It is found that modes of Alfvenic character affected by plasma compressibility and having equal poloidal and toroidal mode numbers (named 'isomon modes') can exist in W7-X. These modes, and the conditions under which they arise, are sensitive to the magnitude of the rotational transform of the field lines and the presence of energetic ions. The energetic ions produced by neutral-beam injection (having the energy 55-60 keV) interact resonantly with large-scale isomon modes (m=n << 10), which tends to lead to instabilities extending over a large part of the plasma cross section.

引用

页数：13

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