On the turbulent heating and the threshold condition in the critical ionization velocity interaction

Details On the turbulent heating and the threshold condition in the critical ionization velocity interaction On the turbulent heating and the threshold condition in the critical ionization velocity interaction

Mar 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987p%26ss...35..345m&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 35, March 1987, p. 345-352.

Computer Science

19

Critical Velocity, Gas Ionization, Ionization Coefficients, Thresholds, Charge Exchange, Computerized Simulation, Energy Dissipation, Neutral Gases, Particle Energy

Scientific paper

On the basis of the nonlinear treatment of the ion beam instability and the modified two-stream instability, threshold conditions for the critical ionization velocity interaction are derived. There are three different regimes of interaction: (1) additional ionization for relative velocities smaller than the critical velocity, (2) the self-sustained discharge for velocities greater than the critical velocity which indeed turns out as a sharp threshold, and (3) an explosive growth regime for velocities exceeding 1.5 times the critical velocity. Additional charge exchange collisions of ions and energy loss of electrons due to excitation do not change the basic threshold behavior but modify the value of the critical velocity.

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