Self-consistent electron transport in collisional plasmas
A self-consistent scheme has been developed to model electron transport in evolving plasmas of arbitrary classical collisionality. The electrons and ions are treated as either multiple donor-cell fluids, or collisional particles-in-cell. Particle suprathermal electrons scatter off ions, and drag against fluid background thermal electrons. The background electrons undergo ion friction, thermal coupling, and bremsstrahlung. The components move in self-consistent advanced E-fields, obtained by the Implicit Moment Method, which permits ..delta..t >> ..omega../sub p//sup -1/ and ..delta..x >> lambda/sub D/ - offering a 10/sup 2/ - 10/sup 3/-fold speed-up over older explicit techniques. The fluid description for the background plasma components permits the modeling of transport in systems spanning more than a 10/sup 7/-fold change in density, and encompassing contiguous collisional and collisionless regions. Results are presented from application of the scheme to the modeling of CO/sub 2/ laser-generated suprathermal electron transport in expanding thin foils, and in multi-foil target configurations.
- Research Organization:
- Los Alamos National Lab., NM (USA)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 5224345
- Report Number(s):
- LA-UR-82-1034; CONF-820429-2; ON: DE82014083
- Country of Publication:
- United States
- Language:
- English
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