Striking dynamics and energy characteristics of a bulk discharge with UV preionization near the threshold voltage

Journal Article · Wed Jul 01 04:00:00 EDT 1987 · J. Eng. Phys. (Engl. Transl.); (United States)

DOI:https://doi.org/10.1007/BF00870205· OSTI ID:5569643

Karnyushin, V N; Samtsov, P P; Soloukhin, R I

Considerable use is made of UV preionization in pulsed laser systems. A necessary condition for obtaining a bulk discharge (BD) at pressures of about 1 atm is the production of an initial electron density n/sub 0/ of about 10/sup 6/-10/sup 8/ cm/sup -3/ in the gap, while the electrodes subsequently receive a voltage pulse whose amplitude U/sub 0/ exceeds some threshold value U/sub 1/ slightly dependent on n/sub 0/. There is interest in the striking dynamics and energy characteristics of BD for U/sub 0/ close to U/sub 1/ primarily because then the ratio of the electric field E to the gas pressure P lies closest to the value optimal for pumping CO/sub 2/ laser levels. The highest efficiency is attained in a pulsed CO/sub 2/ laser with UV preionization for U/sub 0/ = U/sub 1/. At the same time, the discharge build-up time increases when the voltage is near threshold, which enables one to distinguish the major phases and to elucidate the initiation and striking in dense gases. The authors have examined a bulk discharge with UV preionization at voltages near threshold and have determined the optimum striking conditions.

• Research Organization: Lykov Institute of Heat and Mass Transfer, Minsk, USSR
• OSTI ID: 5569643
• Journal Information: J. Eng. Phys. (Engl. Transl.); (United States), Journal Name: J. Eng. Phys. (Engl. Transl.); (United States) Vol. 52:1; ISSN JEPHA
• Country of Publication: United States
• Language: English

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420300* -- Engineering-- Lasers-- (-1989)
CARBON COMPOUNDS
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CHALCOGENIDES
ELECTRIC DISCHARGES
ELECTRIC POTENTIAL
ELECTRICAL PUMPING
ELECTROMAGNETIC RADIATION
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OXIDES
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PULSE RISE TIME
PUMPING
RADIATIONS
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SURFACE PROPERTIES
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TOWNSEND DISCHARGE
ULTRAVIOLET RADIATION
WAVE FORMS