Ionization of a High Energy Neutral Beam Propagating in the Ionosphere
PHILLIPS LAB HANSCOM AFB MA
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By using modeled stripping ionization cross sections and standard atmospheric density models, we calculate stripping ionization probability of high energy MeV neutral beams propagating in the earths atmosphere. Numerical results as functions of altitude, beam angle and beam energy are presented. We also consider Alfvens critical ionization velocity CIV process as an alternate ionization pathway. If CIV occurs as the neutral beam propagates through the geoplasma across the ambient magnetic field, it may be an important pathway to rapid ionization halting the beam. We conclude that the parametric conditions are unfavorable for CIV to occur. Neutral Beam, Stripping, Beam Propagation, Critical Ionization Velocity, Ionosphere.
- Electricity and Magnetism
- Plasma Physics and Magnetohydrodynamics