Abstract
A comprehensive model is presented that describes preionization and discharge ignition processes in large-aperture molecular-gas lasers. By initially filling the interelectrode gap with electrons and establishing a space-charge screen at the cathode, electron avalanche begins adjacent to the anode. Cathode-directed ionization waves develop and ignite the discharge. Dynamic profiling of the electric-field distribution and Penning ionization of a readily ionizable additive combine to decrease both the ignition and quasi-steady-state voltages.
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Beverly, R.E. Discharge ignition phenomena in CO2 and N2O lasers with preliminary filling of the interelectrode gap by electrons. Appl. Phys. B 53, 101–107 (1991). https://doi.org/10.1007/BF00325539
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DOI: https://doi.org/10.1007/BF00325539