Finite larmor-radius theory of magnetic island evolution

F. L. Waelbroeck; J. W. Connor; H. R. Wilson

doi:10.1103/PhysRevLett.87.215003

Finite larmor-radius theory of magnetic island evolution

F. L. Waelbroeck, J. W. Connor, H. R. Wilson

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7 Scopus citations

Abstract

Gyrokinetic theory is used to investigate the effect of the polarization drift on magnetic island evolution. Three regimes are found. For island phase velocities between the ion- and electric-drift velocities, the polarization current is shown to be stabilizing. For phase velocities between the electric- and electron-drift velocities, the island emits drift waves. This results in a radiative drag force. For all other phase velocities the polarization current is destabilizing, in agreement with the fluid limit.

Original language	English
Pages (from-to)	215003-1-215003-4
Journal	Physical Review Letters
Volume	87
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevLett.87.215003
State	Published - Nov 19 2001
Externally published	Yes

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10.1103/PhysRevLett.87.215003

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title = "Finite larmor-radius theory of magnetic island evolution",

abstract = "Gyrokinetic theory is used to investigate the effect of the polarization drift on magnetic island evolution. Three regimes are found. For island phase velocities between the ion- and electric-drift velocities, the polarization current is shown to be stabilizing. For phase velocities between the electric- and electron-drift velocities, the island emits drift waves. This results in a radiative drag force. For all other phase velocities the polarization current is destabilizing, in agreement with the fluid limit.",

author = "Waelbroeck, {F. L.} and Connor, {J. W.} and Wilson, {H. R.}",

year = "2001",

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doi = "10.1103/PhysRevLett.87.215003",

language = "English",

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journal = "Physical Review Letters",

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AU - Waelbroeck, F. L.

AU - Connor, J. W.

AU - Wilson, H. R.

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Y1 - 2001/11/19

N2 - Gyrokinetic theory is used to investigate the effect of the polarization drift on magnetic island evolution. Three regimes are found. For island phase velocities between the ion- and electric-drift velocities, the polarization current is shown to be stabilizing. For phase velocities between the electric- and electron-drift velocities, the island emits drift waves. This results in a radiative drag force. For all other phase velocities the polarization current is destabilizing, in agreement with the fluid limit.

AB - Gyrokinetic theory is used to investigate the effect of the polarization drift on magnetic island evolution. Three regimes are found. For island phase velocities between the ion- and electric-drift velocities, the polarization current is shown to be stabilizing. For phase velocities between the electric- and electron-drift velocities, the island emits drift waves. This results in a radiative drag force. For all other phase velocities the polarization current is destabilizing, in agreement with the fluid limit.

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DO - 10.1103/PhysRevLett.87.215003

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JO - Physical Review Letters

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Finite larmor-radius theory of magnetic island evolution

Abstract

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