Particle acceleration by strong plasma turbulence. II - Acceleration of nonrelativistic electrons in solar flares

Details Particle acceleration by strong plasma turbulence. II - Acceleration of nonrelativistic electrons in solar flares Particle acceleration by strong plasma turbulence. II - Acceleration of nonrelativistic electrons in solar flares

Oct 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...217..644s&link_type=abstract

Astrophysical Journal, Part 1, vol. 217, Oct. 15, 1977, p. 644-656. Research supported by the Max-Planck-Gesellschaft zur Foerd

Astronomy and Astrophysics

Astrophysics

12

Particle Acceleration, Plasma Turbulence, Solar Electrons, Solar Flares, Electron Energy, Lines Of Force, Plasma Heating, Plasma Waves, Solar X-Rays, Stellar Models

Scientific paper

An attempt is made to explain nonrelativistic-electron acceleration in solar flares on the basis of a sequence of processes which allow stored magnetic energy in the form of current filaments or current sheets to be converted into nonrelativistic electrons. Possible processes for producing electron plasma waves in a current are examined together with processes that determine the spectrum of such waves. The stability of current filaments and current sheets is considered, required properties of these configurations for electron acceleration are evaluated, and magnetic-field-line reconnection is discussed. A five-step electron-acceleration sequence is outlined, the first step of which is initial acceleration and heating of electrons by induced electric fields resulting from the tearing-mode instability or field-line reconnection in myriads of small regions situated in either current filaments or current sheets with anomalous resistivity.

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