Plasma diffusion in a space-simulation beam-plasma-discharge

Details Plasma diffusion in a space-simulation beam-plasma-discharge Plasma diffusion in a space-simulation beam-plasma-discharge

Mar 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979georl...6..201s&link_type=abstract

Geophysical Research Letters, vol. 6, Mar. 1979, p. 201-204.

Physics

2

Electron Diffusion, Particle Beams, Plasma Diffusion, Plasma Jets, Plasma-Particle Interactions, Spaceborne Experiments, Crossed Fields, Diffusion Theory, Electron Density Profiles, Electron Energy, Space Simulators, Spacelab Payloads

Scientific paper

Electron density and temperature profiles have been measured in a large-facility beam-plasma-discharge (beam voltage of 1.3 kV, beam current of 63 mA) at low pressure (2-4 x 10 to the -6th torr) and low magnetic fields (1.2 G). The results follow an exponential behavior and are found to be in good agreement with a simple diffusion model. The favorable comparison between theory and experiment yields an estimate of cross-field electron diffusion under conditions intended to simulate Spacelab-borne beam-plasma investigations. This value for cross-field electron diffusion is orders of magnitude larger than would be expected for a cross-field collisional diffusion process, a result that is identified with the turbulent state of collective beam-plasma interactions.

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