Rotation and Kinetic Modifications of the Tokamak Ideal-Wall Pressure Limit

被引：20

作者：

Menard, J. E. ^{[1
]}

Wang, Z. ^{[1
]}

Liu, Y. ^{[2
]}

Bell, R. E. ^{[1
]}

Kaye, S. M. ^{[1
]}

Park, J. -K. ^{[1
]}

Tritz, K. ^{[3
]}

机构：

[1] Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA

[2] Culham Sci Ctr, Culham Ctr Fus Energy, Abingdon OX14 3DB, Oxon, England

[3] Johns Hopkins Univ, Baltimore, MD 21218 USA

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 113卷 / 25期

基金：

英国工程与自然科学研究理事会;

关键词：

KELVIN-HELMHOLTZ INSTABILITY; NEUTRAL BEAM INJECTION; MAGNETOHYDRODYNAMIC MODES; EXTERNAL-MODES; VELOCITY SHEAR; ACTIVE CONTROL; TEARING MODES; PLASMA; STABILITY; STABILIZATION;

D O I：

10.1103/PhysRevLett.113.255002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The impact of toroidal rotation, energetic ions, and drift-kinetic effects on the tokamak ideal wall mode stability limit is considered theoretically and compared to experiment for the first time. It is shown that high toroidal rotation can be an important destabilizing mechanism primarily through the angular velocity shear; non-Maxwellian fast ions can also be destabilizing, and drift-kinetic damping can potentially offset these destabilization mechanisms. These results are obtained using the unique parameter regime accessible in the spherical torus NSTX of high toroidal rotation speed relative to the thermal and Alfven speeds and high kinetic pressure relative to the magnetic pressure. Inclusion of rotation and kinetic effects significantly improves agreement between measured and predicted ideal stability characteristics and may provide new insight into tearing mode triggering.

引用

页数：5

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