Advertisement

Radial Dependence of HF Wave Field Strength in the BPD Column

  • R. J. Jost
  • H. R. Anderson
  • W. Bernstein
  • P. J. Kellogg
Part of the NATO Advanced Study Institutes Series book series (NSSB, volume 79)

Abstract

Several detailed beam/plasma investigation programs have “been conducted in the large vacuum chamber of the Space Environment Simulation Laboratory (SESL) at the NASA Johnson Space Center. In particular, the experiments of Bernstein et al. (1979) show that at a critical electron beam current an instability, the Beam Plasma Discharge (BPD), between the beam and the ambient plasma develops. The BPD onset shows a dramatic change in the light emission, RF spectrum, and beam/plasma electron velocity distribution. Rationale for studying this instability has been generally established in view of describing beam experiments aboard sounding rockets, from the SESL plasma chamber work, and proposed for Shuttle missions. It has been noted in Jost et al. (1980) that an increase in energy by as much as a factor of two, exists for a fraction of the primary beam particles. For the laboratory research with keV beam energies this corresponds to an energy increase of a few keV. Electric field strengths of volts/m must be present within the discharge column to accelerate primary beam electrons by that amount, however, previous work did not isolate the particular waves in RF spectra during BPD that contained volts/m field strengths.

Keywords

Field Strength Electric Field Strength Plasma Wave Radial Dependence Primary Beam Electron 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Baimain, K.G., Impedance of a short dipole in a compressible plasma, Radio Sci., 69D, 559, 1965.Google Scholar
  2. Bernstein, W., H. Leinbach, P. J. Kellogg, S.J. Monson, and T. Hallinan, Further laboratory measurements of the beam plasma discharge, Jour. Geophys. Res., 84, 7271, 1979.ADSCrossRefGoogle Scholar
  3. Grabowski, R., Antenna response to random electric fields due to thermodynamic fluctuations in plasmas, Phys. Fluids, 18, 1387, 1975.ADSCrossRefGoogle Scholar
  4. Jost, R. J., H. R. Anderson, and J. O. McGarity, Measured electron energy distributions during beam/plasma interactions, Geophys. Res. Lett., 7, 509, 1980.ADSCrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1982

Authors and Affiliations

  • R. J. Jost
    • 1
  • H. R. Anderson
    • 2
  • W. Bernstein
    • 2
  • P. J. Kellogg
    • 3
  1. 1.NASA Johnson Space CenterHoustonUSA
  2. 2.Rice UniversityHoustonUSA
  3. 3.University of MinnesotaMinneapolisUSA

Personalised recommendations