Smoothing of laser energy deposition by gas jets

Abstract : Smoothing of laser beam non-uniformities using gas jets has been studied. The experiment has been performed with the PALS laser working at 0.44 ?m with an intensity of about 1015 W/cm2. The laser beam has been split in two by a prism thus creating an artificial large-scale non-uniformity (?90 ?m). We recorded time resolved and static images of laser-gas jet interaction with and without an Al target. Multi 1D and 2D simulations show that such interaction acts redistributing the over-intensities over larger surface. This effect has to be attributed to ionization processes with consequent laser beam refraction. Results show that Argon gas jet produces a strong refraction of the laser beam thus strongly reducing the initial two spots separation. © EDP Sciences and Springer 2009.
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Article dans une revue
European Physical Journal - Special Topics, EDP Sciences, 2009, 175 (1), pp.65-70. 〈10.1140/epjst/e2009-01119-2〉
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Contributeur : Aurélien Arnoux <>
Soumis le : mercredi 23 avril 2014 - 16:25:04
Dernière modification le : jeudi 13 décembre 2018 - 01:33:02

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D. Batani, R. Benocci, R. Dezulian, R. Redaelli, F. Canova, et al.. Smoothing of laser energy deposition by gas jets. European Physical Journal - Special Topics, EDP Sciences, 2009, 175 (1), pp.65-70. 〈10.1140/epjst/e2009-01119-2〉. 〈hal-00964913〉

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