Return current and collisional effects in nonthermal electron beams with pulsed injection

Details Return current and collisional effects in nonthermal electron beams with pulsed injection Return current and collisional effects in nonthermal electron beams with pulsed injection

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990soph..129..325k&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 129, Oct. 1990, p. 325-341. Research supported by SERC and British Council.

Physics

20

Electron Beams, Electron Energy, Solar Corona, Solar Flares, Atmospheric Models, Computerized Simulation, Power Spectra, Solar Atmosphere

Scientific paper

The one-dimensional particle simulation of return current and direct collisional effects is presently used to study the evolution of a pulse of truncated power-law spectrum nonthermal electrons injected into a uniformly dense coronal plasma, deliberately ignoring quasi-linear relaxation of the beam in order to isolate the modification of return-current effects by the pulsed injection. A marked difference is noted, in the energetic electron trajectories over parameter conditions where return current losses dominate, between the pulsed injection case and the continuous injection case (for the same beam current at injection). Energy losses to return-current dissipation are lower in the pulsed case, due to the rapid fall in the local beam current as the pulse disperses in space.

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