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

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7 Author(s)
Ahlstrom, Harlow G. ; University of Washington, Seattle, WA, USA ; Pindroh, A. ; Holzrichter, J. ; Kan, Tehmau
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A large-aperture cold-cathode electron beam with 150 kV and 0.4 A/cm2has been used to sustain 1-μs discharges in a CO2-laser mixture of 3/(1/2)/1. The electron density produced in the gas was approximately 3.9 \times 10^{13} cm-3and 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 CO2lasers can be predicted.

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Quantum Electronics, IEEE Journal of  (Volume:10 ,  Issue: 1 )