Drift–Alfven instabilities of a parallel shearing flow of the finite beta plasma with warm ions: The effect of the compressional magnetic field perturbations

Mikhailenko, V. V.; Lee, Hae June

doi:10.1063/1.4993868

Physics of Plasmas

2017

DOI: 10.1063/1.4993868

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Drift–Alfven instabilities of a parallel shearing flow of the finite beta plasma with warm ions: The effect of the compressional magnetic field perturbations

V. V. Mikhailenko

Hae June Lee

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Cited by 2 publications

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The electromagnetic ion cyclotron instabilities of a plasma with parallel sheared current

Mikhailenko

Lee

2019

Physics of Plasmas

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The electromagnetic (EM) ion cyclotron (IC) instability of a plasma with parallel sheared current is investigated analytically with numerical solutions. This instability is the electromagnetic counterpart of the electrostatic current-driven ion cyclotron instability, which is renowned as the Drummond-Rosenbluth (DR) instability. Considered is the case with the current velocity shearing rate less than the ion cyclotron frequency, which corresponds to the tokamak and space plasmas. We found two new EM DR instabilities: the modified EM DR instability by the current shear and the subcritical EM DR instability which develops above the upper and below the lower critical velocities of the EM DR instability driven by the uniform current, respectively. The modified EM DR instability by the current shear develops due to the inverse electron Landau damping, whereas the subcritical EM DR instability develops due to the coupled effect of the IC damping and the current shear jointly with the inverse electron Landau damping. We also found the shear-flow-driven EM IC instability of the current-free sheared flow which develops by virtue of the coupled action of the IC damping and flow velocity shear.

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The electromagnetic ion cyclotron instabilities of a plasma with parallel sheared current

Mikhailenko

Lee

2019

Physics of Plasmas

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The combined kinetic effects of the ion temperature gradient and the velocity shear of a plasma flow parallel to the magnetic field on the drift-Alfven instabilities

Mikhailenko

Lee

2020

Physics of Plasmas

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The drift-Alfvén instabilities of the sheared flow along the magnetic field of a finite beta (1>β≫me/mi) plasma with comparable inhomogeneous ion temperature and homogeneous electron temperature are examined by the numerical analysis of the derived linear dispersion equation. Accounting for the electromagnetic ion kinetic response, which has been neglected in conventional discussions of the drift-Alfvén instabilities of a steady plasma, a new kinetic drift-Alfvén instability has been found. It develops in a plasma shear flow due to the coupled action of the ion temperature gradient, the flow velocity shear, and the inverse ion Landau damping.

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Drift–Alfven instabilities of a parallel shearing flow of the finite beta plasma with warm ions: The effect of the compressional magnetic field perturbations

Cited by 2 publications

References 18 publications

The electromagnetic ion cyclotron instabilities of a plasma with parallel sheared current

The electromagnetic ion cyclotron instabilities of a plasma with parallel sheared current

The combined kinetic effects of the ion temperature gradient and the velocity shear of a plasma flow parallel to the magnetic field on the drift-Alfven instabilities

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