Incoherent scattering of microwaves from enhanced density fluctuations in a DC-discharge
Carr, Wayne Elbert
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https://hdl.handle.net/2142/25701
Description
Title
Incoherent scattering of microwaves from enhanced density fluctuations in a DC-discharge
Author(s)
Carr, Wayne Elbert
Issue Date
1967
Doctoral Committee Chair(s)
Raether, M.J.
Department of Study
Physics
Discipline
Physics
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
incoherent scattering of microwaves
enhanced density fluctuations
DC-discharge
cylindrical neon discharge
Language
en
Abstract
"Radiation of 9375 MHz is incident on a cylindrical neon
discharge enclosed in a 1"" square waveguide and incoherent scattering
in the upper sideband is investigated. Scattering is observed in the
backward and forward directions from the naturally enhanced density
fluctuations in two electron plasma modes for gas pressures between
-3 -3""
3.8xlO Torr and 8.0XlO Torr. The measured electron mode frequencies
are in general agreement with other experiments. The
enhancement, varying between 30 and 8000 times the estimated thermal
value is correlated over most of the pressure range to excess superthermal
electrons present in the discharge, as measured by a Langmuir
probe."
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