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Article Dans Une Revue The European Physical Journal. Special Topics Année : 2009

Smoothing of laser energy deposition by gas jets

Victor Malka
Jérôme Faure

Résumé

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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Dates et versions

hal-00964913 , version 1 (23-04-2014)

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Citer

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