Analysis of a cyclotron maser instability in cylindrical geometry

I  Vorgul; R A  Cairns; R  Bingham

doi:10.1063/1.2139506

Analysis of a cyclotron maser instability in cylindrical geometry

I Vorgul, R A Cairns, R Bingham

Applied Mathematics

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35 Citations (Scopus)

Abstract

Cyclotron maser instability is known to be one of the main mechanisms of coherent radio emission in space and laboratory plasmas. This paper investigates a particular case of such an instability induced by a horseshoe- or crescent-shaped electron velocity distribution function, which is produced when an electron beam propagates in a convergent magnetic field, whether it is Earth's magnetic field or one introduced in a laboratory experiment. The instability is analyzed in cylindrical geometry which is relevant to auroral kilometric radiation and to a laboratory experiment. Exact modeling of TE and TM anisotropic modes for circular electronic beam shows its high growth rate for modes with almost perpendicular propagation. (c) 2005 American Institute of Physics.

Original language	English
Article number	122903
Number of pages	8
Journal	Physics of Plasmas
Volume	12
Issue number	12
DOIs	https://doi.org/10.1063/1.2139506
Publication status	Published - Dec 2005

Keywords

AURORAL KILOMETRIC RADIATION
PLASMA WAVE-GUIDE
MAGNETIC-FIELD
GENERATION
DISTRIBUTIONS
PROPAGATION
EMISSION

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10.1063/1.2139506

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AU - Cairns, R A

AU - Bingham, R

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AB - Cyclotron maser instability is known to be one of the main mechanisms of coherent radio emission in space and laboratory plasmas. This paper investigates a particular case of such an instability induced by a horseshoe- or crescent-shaped electron velocity distribution function, which is produced when an electron beam propagates in a convergent magnetic field, whether it is Earth's magnetic field or one introduced in a laboratory experiment. The instability is analyzed in cylindrical geometry which is relevant to auroral kilometric radiation and to a laboratory experiment. Exact modeling of TE and TM anisotropic modes for circular electronic beam shows its high growth rate for modes with almost perpendicular propagation. (c) 2005 American Institute of Physics.

KW - AURORAL KILOMETRIC RADIATION

KW - PLASMA WAVE-GUIDE

KW - MAGNETIC-FIELD

KW - GENERATION

KW - DISTRIBUTIONS

KW - PROPAGATION

KW - EMISSION

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DO - 10.1063/1.2139506

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VL - 12

JO - Physics of Plasmas

JF - Physics of Plasmas

IS - 12

M1 - 122903

ER -

Analysis of a cyclotron maser instability in cylindrical geometry

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Keywords

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