Performance of the Antares large area cold cathode electron gun
The performance of the electron gun which supplies ionization for the Antares high-power electron-beam-sustained CO/sub 2/-laser power amplifier is described. This electron gun is a coaxial cylindrical cold cathode vacuum triode having a total electron aperture area of approximately 9 m/sup 2/. Electrons are extracted from the gun in pulses of 3 to 6 ..mu..s duration, average current densities of 40 to 60 mA/cm/sup 2/, and electron energies of 450 to 500 keV. The main areas of discussion in this paper are the performance in terms of grid control, current-density balance, and current runaway due to breakdown limitations. Comparison of the experimental results with the predictions of a theoretical model for the electron gun are also presented.
- Research Organization:
- Los Alamos National Lab., NM (USA)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6256404
- Report Number(s):
- LA-UR-83-1543; CONF-830621-7; ON: DE83012775
- Country of Publication:
- United States
- Language:
- English
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AMPLIFIERS
ANTARES FACILITY
BREAKDOWN
CARBON DIOXIDE LASERS
CONTROL
CURRENT DENSITY
ELECTRODES
ELECTRON SOURCES
ELECTRONIC EQUIPMENT
EQUIPMENT
GAS LASERS
LASERS
PARTICLE SOURCES
PERFORMANCE
RADIATION SOURCES