| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1684054 | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms | 2013 | 5 Pages |
Abstract
Amplitude-modulated UV laser pulse of up to 30Â J energy was produced at hybrid Ti:Sapphire/KrF GARPUN-MTW laser facility when a preliminary amplified train of short pulses was injected into unstable resonator cavity of the main e-beam-pumped KrF amplifier. The combined radiation consisted of regeneratively amplified picosecond pulses with subTW peak power overlapped with 100-ns pulse of a free-running lasing. The advantages of combined radiation for production of long-lived prolonged plasma channels in air and HV discharge triggering were demonstrated: photocurrent sustained by modulated pulse is two orders of magnitude higher and HV breakdown distance is twice longer than for a smooth UV pulse. It was found that in contrast to IR radiation multiple filamentation of high-power UV laser beam does not produce extended nonlinear focusing of UV radiation.
Keywords
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Materials Science
Surfaces, Coatings and Films
Authors
V.D. Zvorykin, A.A. Ionin, A.O. Levchenko, L.V. Seleznev, A.V. Shutov, D.V. Sinitsyn, I.V. Smetanin, N.N. Ustinovskii,