ArF short-pulse extraction studies

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Abstract
A series of measurements characterizing an e‐beam pumped ArF* laser was carried out using a 200‐ns e‐beam pulse having a rise time of 25 ns at currents up to 50 A/cm2. These pump conditions are relevant for inertial confinement fusion laser drivers. Intrinsic laser efficiencies up to 7.7% and power efficiencies up to 10% were observed. At high pressures (2 atm<P2/Ar/Ne mixtures performed significantly better than F2/Ar mixtures. Absorption measurements were performed in Ne‐buffered mixtures as a function of pressure, wavelength, and time. It appears that the background absorption peaks at a wavelength of 220 nm and is significantly smaller near 193 nm.

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