Electron - cyclotron maser and solar microwave millisecond spike emission

Details Electron - cyclotron maser and solar microwave millisecond spike emission Electron - cyclotron maser and solar microwave millisecond spike emission

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986cha%26a..10...22l&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 10, Issue 1, p. 22-29.

Astronomy and Astrophysics

Astrophysics

Scientific paper

We propose a mechanism of generating solar microwave millisecond spike emission by the electron-cyclotron maser driven by a hollow-beam distribution of 60 keV non-thermal electrons. We have derived the rate of growth of the second harmonic of the x-mode, and its variation in time, the maser saturation time, the saturation wave energy density and the directional properties of the maser. We found that, for a magnetic field B = 507 G, a plasma density ne = 4(+9) cm-3 an electron temperature Te = 1.4 (+6) K, a ratio between non-thermal and thermal electrons ns/ne ~ 4(-5) a scale height of magnetic field B/(dB/dl) ~ 100 km, millisecond spike emission with a high brightness temperature Tb ~ 5 (+15) K will be generated at 2.84 GHz.

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