Results of the time-dependent gain with a high-current electron-beam sustained discharge in CO2

A large-aperture cold-cathode electron beam with 150 kV and 0.4 A/cm 2 has been used to sustain 1-μs discharges in a CO 2 -laser mixture of 3/(1/2)/1. The electron density produced in the gas was approximately 3.9 \times 10^{13} cm -3 and thus for 1 atm a discharge power density of 150 J/1μs was ach...

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Bibliographic Details
Published in:IEEE journal of quantum electronics 1974-01, Vol.10 (1), p.26-29
Main Authors: Ahlstrom, H., Pindroh, A., Holzrichter, J., Kan, T., Inglesakis, G., Kolb, A., Jansen, H.
Format: Article
Language:English
Subjects:
Current measurement
Electron beams
Fault location
Gain measurement
Ionization
Laboratories
Laser excitation
Laser theory
Optical pulses
Pump lasers
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Summary:A large-aperture cold-cathode electron beam with 150 kV and 0.4 A/cm 2 has been used to sustain 1-μs discharges in a CO 2 -laser mixture of 3/(1/2)/1. The electron density produced in the gas was approximately 3.9 \times 10^{13} cm -3 and thus for 1 atm a discharge power density of 150 J/1μs was achieved at 5.4 kV/cm for the sustainer electric field. The time-dependent gain for the 001-100 transition has been measured. Taking the experimental values of the discharge power, the gain has also been calculated using a kinetics program and a solution of the Boltzmann equation for the fractional power transfer. The good agreement between the experimental and calculated results gives confidence that the performance of cold-cathode electron-beam sustained-discharge CO 2 lasers can be predicted.
ISSN:0018-9197
1558-1713
DOI:10.1109/JQE.1974.1068072