Initiation techniques and the vacuum-ultraviolet-radiation efficiency of a stabilized multichannel surface discharge
- Laboratoire Lasers, Plasmas et Procedes Photoniques (LP3), UMR 6182 CNRS, Universite Aix-Marseille II, Campus de Luminy, Case 917, Cedex 9, 13288 Marseille (France) and Photochemical Processes Laboratory, P. N. Lebedev Physical Institute, Leninsky prospekt 53, Moscow 119991 (Russian Federation)
Multichannel surface discharges possess a number of advantageous characteristics for the optical pumping of photochemically driven lasers. This work reports on a type of large-area low-inductance sources of intense UV-VUV (vacuum-ultraviolet) radiation based on spatially stabilized multichannel discharges in gases. The discharges consist of several dozens of closely located parallel plasma channels initiated synchronously along a dielectric surface on the area of several hundred square centimeters. In comparison with a large-area diffuse surface discharge, the plasma confinement within relatively thin channels greatly improves the efficiency of the discharge emission in the VUV spectral range. Several techniques are introduced, which allow a synchronous formation and homogeneous development of multiple spatially stabilized discharge channels. Technical efficiency of the discharge radiation within the spectral range of 120-200 nm reaches 5% and an effective brightness temperature of the radiating plasma exceeds 20 kK. Synchronous operation of a number of multichannel discharge modules producing high-intensity submicrosecond optical pulses is demonstrated, which is of importance for the pump source scaling and geometrical adaptation.
- OSTI ID:
- 20778564
- Journal Information:
- Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 1 Vol. 77; ISSN 0034-6748; ISSN RSINAK
- Country of Publication:
- United States
- Language:
- English
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