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K: Fachverband Kurzzeitphysik

K 4: Poster I

K 4.10: Poster

Dienstag, 13. März 2012, 16:30–18:30, Poster.V

Design considerations for argon excimer laser produced in a discharge using plasma electrodes — •Norbert Böwering — Ringstr. 21, 33619 Bielefeld, Germany

The design of a discharge-produced vacuum ultra-violet argon excimer laser at 126 nm is discussed. In this case study, system operation should be done with purified argon in a cooled high-pressure vessel at densities above 4 × 10²⁰ cm⁻³ with deposited energies of about 1 Jcm⁻³ into an excitation volume of ∼10 cm⁻³. A modified corona-discharge triggered cooled spark gap may serve as main switch. Streamer-free homogeneous discharges can be obtained by means of ceramic-enclosed plasma electrodes. Charge transfer of 10 J of stored energy via pulse-shaping in a high-voltage, low-inductance peaking circuit enables the required ultrafast current rise time. A damage-resistant optical configuration with conditioned optics consisting of high-reflector, output coupler and transmission window is proposed. At realistic conversion efficiencies, generation of laser pulses with few ns duration and energies of above 10 mJ/pulse can be expected.