2015
DOI: 10.1103/physrevlett.114.065001
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Abstract: In a rotating toroidal plasma surrounded by a resistive wall, it is shown that linear MHD instabilities can be excited by couplings between the resistive wall mode (RWM) and stable ideal MHD modes. In particular, it is shown that the RWM can couple not only with stable external kink modes but also with Alfvén eigenmodes that are ordinarily in the stable continuum of a toroidal plasma. The RWM growth rate is shown to peak whenever the Doppler shift caused by the plasma rotation cancels the frequency of an ideal… Show more

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Cited by 2 publications
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“…This simplified calculation based on reduced MHD includes parallel dynamics but neglects the divergence of the E × B drift ∇ • v ⊥ and the perpendicular resistivity η ⊥ . The purpose of this derivation is threefold: (1) to show that these two last effects are not necessary to obtain the qualitative results, i.e. complex roots and stabilization for positive constantψ matching parameter ∆ ; (2) to illustrate this simple approach for use in other tearing regimes; and (3) to exploit the simplicity of this model to elucidate the physics.…”
Section: Introductionmentioning
confidence: 99%
“…This simplified calculation based on reduced MHD includes parallel dynamics but neglects the divergence of the E × B drift ∇ • v ⊥ and the perpendicular resistivity η ⊥ . The purpose of this derivation is threefold: (1) to show that these two last effects are not necessary to obtain the qualitative results, i.e. complex roots and stabilization for positive constantψ matching parameter ∆ ; (2) to illustrate this simple approach for use in other tearing regimes; and (3) to exploit the simplicity of this model to elucidate the physics.…”
Section: Introductionmentioning
confidence: 99%