Continued Studies in Hall Current Effects on Beam Stability.
Abstract
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, ohm's 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 AFWL/SNLA 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 31, 1983
- Accession Number
- ADA148557
Entities
People
- D. A. Keeley
- R. L. Feinstein