Comparison of carbon fiber and cesium iodide-coated carbon fiber cathodes

Presents results of an experimental comparison of a bare carbon fiber cathode and the same cathode when coated with cesium iodide salt (CsI). An annular cathode was constructed by arranging carbon fibers in an annular tuft pattern. The cathode was then operated as a bare carbon fiber cathode and in...

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Bibliographic Details
Published in:IEEE transactions on plasma science 2000-06, Vol.28 (3), p.517-522
Main Authors: Shiffler, D.A., LaCour, M.J., Sena, M.D., Mitchell, M.D., Haworth, M.D., Hendricks, K.J., Spencer, T.A.
Format: Article
Language:English
Subjects:
Annular
Carbon
Carbon dioxide
Carbon fibers
Cathodes
Coatings
Diodes
Electric discharges
Electric field strength
Electric potential
Electron beams
Electron tubes
Emission, absorption, and scattering of radio-wave and microwave radiation
Evolution
Exact sciences and technology
Impedance
Microwaves
Modulators
Optical fiber testing
Physics
Physics of gases, plasmas and electric discharges
Physics of plasmas and electric discharges
Plasma production and heating
Plasma properties
Plasma sources
Plasmas
Salt
Voltage
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Summary:Presents results of an experimental comparison of a bare carbon fiber cathode and the same cathode when coated with cesium iodide salt (CsI). An annular cathode was constructed by arranging carbon fibers in an annular tuft pattern. The cathode was then operated as a bare carbon fiber cathode and in a configuration with a CsI coating. The cathode was tested at electric field strengths ranging from 50 kV/cm to 265 kV/cm at anode-cathode (A-K) gaps of 3.175 cm. The applied voltage had a 1-/spl mu/s duration and the modulator was operated at up to 1 Hz repetition rate. The system had a low base pressure (
ISSN:0093-3813
1939-9375
DOI:10.1109/27.887662