Stabilization of resistive wall modes by slow plasma rotation

Journal Article · Fri Dec 01 04:00:00 EST 1995 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.871009· OSTI ID:165830

Boozer, A H ^[1]

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1. Department of Applied Physics, Columbia University, New York, New York 10027 (United States)

External kinks that drive magnetic islands inside a plasma can be stabilized by a resistive wall for even a slow plasma rotation. It is shown that only a subclass of ideal kinks avoid driving islands and stabilization by slow rotation. In addition, the separatrix of a tokamak divertor causes external kink instabilities to have resonant surfaces within the plasma and drive islands. Consequently, tokamaks with a hot divertor scrape-off layer may be more stable to resistive wall modes than tokamaks with limiters. It is shown that the calculation and description of the stability of wall modes is greatly simplified by the use of the inductance, resistance, and torque associated with a surface current. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.

• OSTI ID: 165830
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 12 Vol. 2; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DIVERTORS
KINK INSTABILITY
MAGNETIC ISLANDS
MAGNETOHYDRODYNAMICS
PLASMA MACROINSTABILITIES
PLASMA SCRAPE-OFF LAYER
ROTATING PLASMA
STABILIZATION
TOKAMAK DEVICES
WALL EFFECTS