INFLUENCE OF MAGNETIC SHEAR ON LOWER-HYBRID-DRIFT INSTABILITY IN TOROIDAL REVERSED-FIELD PINCHES

被引：14

作者：

DAVIDSON, RC ^{[1
]}

GLADD, NT ^{[1
]}

GOREN, Y ^{[1
]}

机构：

[1] UNIV MARYLAND,DEPT PHYS & ASTRON,COLLEGE PK,MD 20742

来源：

PHYSICS OF FLUIDS | 1978年 / 21卷 / 06期

关键词：

D O I：

10.1063/1.862343

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The influence of magnetic shear on the lower-hybrid-drift instability is investigated, including application to microstability properties of post-implosion reversed-field-pinch profiles. Two complementary analyses are performed. One analysis includes the influence of magnetic shear and finite ion beta in a fully electromagnetic model that assumes Te/T i≪1, but otherwise incorporates the effects of transverse magnetic perturbations (δB≠0). The other analysis includes the influence of magnetic shear and finite Te/Ti in an electrostatic model that neglects finite plasma beta effects. In both cases, it is found that sufficiently strong magnetic shear can completely -stabilize the lower-hybrid-drift instability. The theoretical model is used to investigate the microstability properties of post-implosion reversed-field-pinch profiles. It is shown that the lower-hybrid-drift instability persists in regions of moderate magnetic shear only if the local density gradient is sufficiently large. Moreover, for the diffuse profiles anticipated in the Los Alamos ZT-40 experiment, the lower-hybrid-drift instability is completely stabilized. © 1978 American Institute of Physics.

引用

页码：992 / 999

页数：8

共 13 条

[1]

BAKER DA, 1976, PLASMA PHYSICS CONTR, V1, P419

[2]

BAKER DD, COMMUNICATION

[3]

BODIN HAB, 1976, PLASMA PHYS S, V18, P39

[4] ANOMALOUS TRANSPORT PROPERTIES ASSOCIATED WITH LOWER-HYBRID-DRIFT INSTABILITY [J].