The saturation of the electron-cyclotron maser instability and the interpretation of solar millisecond spikes

Details The saturation of the electron-cyclotron maser instability and the interpretation of solar millisecond spikes The saturation of the electron-cyclotron maser instability and the interpretation of solar millisecond spikes

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...237..512a&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 237, no. 2, Oct. 1990, p. 512-523.

Astronomy and Astrophysics

Astrophysics

41

Electron Cyclotron Heating, Maser Outputs, Solar Corona, Emission Spectra, Particle Diffusion, Polarization Characteristics, Radiation Absorption, Radio Emission, Solar Magnetic Field

Scientific paper

A self-consistent numeric two-dimensional code of the kinetic wave-particle equations developed to investigate the maser dynamics in the solar context is applied to solar millisecond-spike observations in order to improve the diagnostic capabilities of the theory of the electron-cyclotron maser instablitity. Attention is given to the inhomogeneity of the magnetic field selecting magneto-ionic modes with relatively short saturation lengths and suppressing mechanisms such as collisional deflection, free-free absorption, and gyroresonance absorption. The time scales of maser saturation in respect to time scales of global particle changes in a magnetic loop are covered, relevant observations of solar millisecond spikes are described, and the interpretation in terms of physical parameters deduced from the quasi-linear maser simulations are presented. It is demonstrated that the quasi-linear simulations make it possible to constrain the physical parameters from the observed time scale and frequency.

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