Interplay between collective and collisional processes in critical velocity ionization

Details Interplay between collective and collisional processes in critical velocity ionization Interplay between collective and collisional processes in critical velocity ionization

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....9510345m&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 95, July 1, 1990, p. 10345-10356.

Physics

15

Critical Velocity, Ion Production Rates, Plasma-Particle Interactions, Solar System, Beam Interactions, Charge Exchange, Elastic Scattering, Electron Scattering, Ionic Collisions

Scientific paper

One-dimensional numerical simulations of critical ionization velocity (CIV) discharges are performed, with density variation in the direction of plasma-neutral relative velocity. Metastable states participate strongly in ionization near the critical velocity, while the metastable effect becomes relatively unimportant at high velocities. Electron-neutral elastic collisions appear to be unimportant. Charge exchange is found to be crucial in sustaining the discharge when the beam velocity is low but is unimportant when the beam velocity is high. Results are reported for neon, helium xenon, and barium. It is reported that line excitation strongly drains energy for barium beams in space, so that the threshold velocity for critical ionization of barium is substantially raised despite a low ionization potential. This suggests why barium beam ejections, the most common method for investigating CIV in space, have so far achieved inconclusive results.

Affiliated with

Also associated with

No associations

Rating

Interplay between collective and collisional processes in critical velocity ionization does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Interplay between collective and collisional processes in critical velocity ionization, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interplay between collective and collisional processes in critical velocity ionization will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1095251