Amplification of critical velocity ionization by a pulsed neutral beam

Details Amplification of critical velocity ionization by a pulsed neutral beam Amplification of critical velocity ionization by a pulsed neutral beam

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17..737l&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 17, May 1990, p. 737-740.

Physics

4

Computerized Simulation, Critical Velocity, Gas Ionization, Neutral Beams, Pulsed Radiation, Space Plasmas, Electric Discharges, Ion Production Rates, Magnetization, Plasma Density

Scientific paper

Numerical results of computer simulations on critical ionization velocity (CIV) discharges in pulsed neutral beams are presented. Using the particle-in-cell method of computer simulations, a detailed time history of the CIV process is shown as a result of the interplay between plasma (wave-particle) interactions and collisional (ionization, charge exchange) processes. It is found that ions slowing down and lagging behind the pulses can still contribute to electron heating. Simulation results show that CIV in a multiple pulsed beam is more efficient than that in a single continuous pulse.

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