NEUTRAL BEAM DRIVEN GLOBAL ALFVEN EIGENMODES IN THE WENDELSTEIN W7-AS STELLARATOR

被引：67

作者：

WELLER, A ^{[1
]}

SPONG, DA ^{[1
]}

JAENICKE, R ^{[1
]}

LAZAROS, A ^{[1
]}

PENNINGSFELD, FP ^{[1
]}

SATTLER, S ^{[1
]}

机构：

[1] OAK RIDGE NATL LAB,OAK RIDGE,TN 37831

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.72.1220

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

During neutral beam injection coherent magnetohydrodynamic activity occurs at low and medium beta, which is driven by the energetic beam particles. An interpretation is given in terms of marginally stable global Alfven eigenmodes (GAE), which are destabilized by Landau resonances of the fast circulating particles. Toroidicity induced gaps for toroidal Alfven eigenmodes do not occur in W7-AS, but GAE modes in gaps below the shear Alfven continua can be excited. This is investigated within a gyrofluid model, which has been used successfully for tokamak cases previously.

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页码：1220 / 1223

页数：4

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