Analysis of a cyclotron maser instability in cylindrical geometry

Details Analysis of a cyclotron maser instability in cylindrical geometry Analysis of a cyclotron maser instability in cylindrical geometry

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005phpl...12l2903v&link_type=abstract

Physics of Plasmas, Volume 12, Issue 12, pp. 122903-122903-8 (2005).

Physics

15

Macroinstabilities, Laboratory Studies Of Space- And Astrophysical-Plasma Processes, Particle Beam Interactions In Plasmas, Emission, Absorption, And Scattering Of Electromagnetic Radiation, Magnetohydrodynamics And Plasmas, Radiation Mechanisms, Polarization

Scientific paper

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.

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