The role of resistivity on line-tied kink modes in cylindrical geometry

Journal Article · Sun Jul 15 04:00:00 EDT 2007 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.2746213· OSTI ID:20975139

Delzanno, G L; Evstatiev, E G; Finn, J M ^[1]

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1. T-15 Plasma Theory Group, Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

An investigation of the effect of resistivity on linear line-tied kink modes is presented in cylindrical geometry. A region near marginal stability, where the line-tied system is stable in ideal magnetohydrodynamics but unstable with resistivity, is shown. In this region, the growth rate is found to be proportional to resistivity. There is no signature of the tearing-like scaling, which occurs in the corresponding system with periodic boundary conditions, or of the formation of boundary layers near the end plates. Instead, the resistive scaling is due to global resistivity, leading to imperfect line-tying. This feature is common to equilibrium pitch profiles that increase or decrease monotonically with radius and is not influenced by viscosity.

• OSTI ID: 20975139
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 7 Vol. 14; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BOUNDARY CONDITIONS
BOUNDARY LAYERS
CYLINDRICAL CONFIGURATION
EQUILIBRIUM
GEOMETRY
KINK INSTABILITY
MAGNETOHYDRODYNAMICS
PERIODICITY
PLASMA
STABILITY