Accession Number : AD0439209


Title :   EXCITATION OF PLASMA OSCILLATIONS BY SHOCK WAVES,


Corporate Author : TECHNISCHE HOCHSCHULE HANNOVER (WEST GERMANY)


Personal Author(s) : Welly,Jurgen-Dietrich


Report Date : 01 Sep 1963


Pagination or Media Count : 57


Abstract : The velocity distribution of the electrons within a plasma shock front is investigated by methods of the kinetic theory arranged in a manner to account for heavy deviations from thermodynamic equilibrium. The distribution function exhibits two peaks and becomes unstable with respect to electron oscillations, the shock wave being sufficiently strong (Mach number greater than approximately 6.5). The second peak is formed by runaway electrons, i.e. those fast electrons which transgress the shock front from the hot region. The frequencies, wave numbers, growth rates, phase and group velocities of the excited oscillations, and the influence of the Ohmic damping are calculated approximatively. The results are applied to non-thermal radiofrequency radiation of the sun. (Author)


Descriptors :   *PLASMAS(PHYSICS) , SHOCK WAVES , EXCITATION , OSCILLATION , VELOCITY , DISTRIBUTION , KINETIC THEORY , THERMODYNAMICS , ELECTRONS


Distribution Statement : APPROVED FOR PUBLIC RELEASE