Effect of plasma motion on tearing modes in cylindrical plasmas

The effect of equilibrium plasma motion on the resistive m/n = 2/1 tearing mode (TM) in low β plasmas is investigated in cylindrical geometry (with m and n being poloidal and toroidal mode numbers). Without equilibrium plasma motion but with viscosity, the TM stability is mainly determined by the Re...

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Bibliographic Details
Published in:Physics of plasmas 2015-10, Vol.22 (10)
Main Authors: Xu, J. Q., Peng, X. D.
Format: Article
Language:English
Subjects:
Coupling coefficients
Cylindrical plasmas
Destabilization
Economic models
Equilibrium
Fluid flow
Magnetic flux
Motion stability
Perturbation
Plasma physics
Prandtl number
Reynolds number
Rotating plasmas
Rotation
Shear
Tearing
Tearing modes (plasmas)
Velocity
Viscosity
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Summary:The effect of equilibrium plasma motion on the resistive m/n = 2/1 tearing mode (TM) in low β plasmas is investigated in cylindrical geometry (with m and n being poloidal and toroidal mode numbers). Without equilibrium plasma motion but with viscosity, the TM stability is mainly determined by the Reynolds number S and reaches maximum near S = 104, which is consistent with previous findings. The poloidal plasma rotation has stabilizing effect on TM; however, the rotation shear has destabilization effect in the low viscosity regime. The axial plasma motion has strong stabilizing effect on TM in the low viscosity regime for Prandtl number Pr 
ISSN:1070-664X
1089-7674
DOI:10.1063/1.4934351