Ring-beam driven maser instability for quasiperpendicular shocks

Details Ring-beam driven maser instability for quasiperpendicular shocks Ring-beam driven maser instability for quasiperpendicular shocks

Feb 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007phpl...14b2901y&link_type=abstract

Physics of Plasmas, Volume 14, Issue 2, pp. 022901-022901-6 (2007).

Physics

5

Macroinstabilities, Shock Waves And Discontinuities, Emission, Absorption, And Scattering Of Electromagnetic Radiation, Particle Beam Interactions In Plasmas, Electromagnetic Radiation Interactions With Plasma, Magnetized Plasmas

Scientific paper

The cyclotron maser instability is a well-known radiation emission mechanism responsible for radio emissions in magnetized planets and for laboratory microwave generation devices. The present paper discusses mechanisms and properties of cyclotron maser instability driven by a ring-beam distribution of energetic electrons with application to the quasiperpendicular collisionless shock. It is shown that the fast extraordinary and ordinary electromagnetic waves as well as slow upper-hybrid Z-mode are excited over a wide range of physical parameters. The implications of the present findings for actual applications including the coronal type II radio source are also discussed.

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