Continued Studies in Hall Current Effects on Beam Stability.
Annual technical rept. 17 Mar 82-31 Oct 83,
SCIENCE APPLICATIONS INC PALO ALTO CA
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This report summarizes recent progress in the investigation of low-density air chemistry and tensor conductivity Hall-current effects and its impact on high-current beam stability. In section 2, the results of modeling high current beams in low-density air are discussed. At low-densities, the standard simplifying assumptions usually employed in conductivity modeling no longer apply scalar conductivity, ohms law local-instantaneous energy deposition Maxwellian distributed plasma electrons no delta rays and no inertial effects. These assumptions are not made in the present model. It is concluded that Hall currents do play a significant role at low enough densities and that the redistribution of plasma current can result in a significant but sudden increase in the magnetic pinch below a critical air density. Section 3 discusses the viability of using the AFWLSNLA HERMES facility for addressing important issues of high-current hose stability. It is concluded that with proper pulse conditioning, the HERMES pulse should be able to test high-current hose growth saturation and calibrate existing hose codes.
- Theoretical Mathematics
- Electricity and Magnetism