Energy and angular distributions of energetic flare electrons and their X-radiation. I - Initially monoenergetic electrons

Details Energy and angular distributions of energetic flare electrons and their X-radiation. I - Initially monoenergetic electrons Energy and angular distributions of energetic flare electrons and their X-radiation. I - Initially monoenergetic electrons

May 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...146..159h&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 146, no. 1, May 1985, p. 159-167.

Astronomy and Astrophysics

Astrophysics

13

Energetic Particles, High Temperature Plasmas, Solar Flares, Solar X-Rays, X Ray Spectra, Angular Distribution, Bremsstrahlung, Debye Length, High Energy Electrons, Monte Carlo Method, Relativistic Electron Beams, Satellite-Borne Instruments, Solar Atmosphere, Solar Maximum Mission

Scientific paper

For initially monoenergetic flare electrons penetrating the solar atmosphere the evolution of the energy and angular distributions is calculated. The ambient atmosphere is assumed to be a fully ionized thermal plasma of protons and electrons. Analytically treated small-angle scattering processes are combined with Monte Carlo calculations of large-angle deflections by electron-electron and electron-proton collisions. Small-angle multiple scattering determines the mean energy loss, while single collisions with large deflections provide the main spread of the electrons' energy and angular distributions. With the aid of these distribution functions spectra of the total bremsstrahlung emitted in various layers of the atmosphere, represented by their column densities, are calculated for various relativistic as well as nonrelativistic primary electron energies. By summing over the layers the spectra of the bremsstrahlung emitted by the flare electrons in the whole plasma are determined.

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