Studies in High Current Beam Propagation at Reduced Pressures.
Annual rept. 15 Mar 81-30 Nov 84,
SCIENCE APPLICATIONS INTERNATIONAL CORP LOS ALTOS CA
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Hall current effects in the redistribution of plasma currents and possible stability enhancement in electron beams were explored in a range of pressure regimes. Improved e.m. algorithms and conductivity models were developed as part of the studies. Substantial effects were found below a low pressure threshold, where nonlocal effects, non-Ohmic conductivity, and a highly non-Maxwellian distribution of plasma electron energies were all found to contribute significantly to the magnitude of Hall current phenomena. Several e.m. field algorithms were developed for application to the nonlinear hose-displacement regime. An iterative approach to the solution of the modally expanded field equations was found to yield fast and accurate solutions.
- Plasma Physics and Magnetohydrodynamics