Smoothing of laser energy deposition by gas jets
D. Batani
(1)
,
R. Benocci
(1)
,
R. Dezulian
(1)
,
R. Redaelli
(1)
,
F. Canova
(1)
,
H. Stabile
(1)
,
G. Lucchini
(1)
,
Victor Malka
(2)
,
Jérôme Faure
(2)
,
M. Koenig
(3)
,
E. Krousky
(4)
,
K. Masek
(4)
,
M. Pfeifer
(4)
,
J. Skala
(4)
,
R. Dudzak
(4)
,
J. Limpouch
(5)
,
V. Tikhoncuk
(6)
,
P. Nicolai
(6)
1
Dipartimento di Fisica "Giuseppe Occhialini" = Department of Physics "Giuseppe Occhialini" [Milano-Bicocca]
2 LOA - Laboratoire d'optique appliquée
3 LULI - Laboratoire pour l'utilisation des lasers intenses
4 PALS Research Centre, Za Slovankou 3, 18221 Prague 8, Czech Republic
5 CTU - Czech Technical University in Prague
6 CELIA - Centre d'Etudes Lasers Intenses et Applications
2 LOA - Laboratoire d'optique appliquée
3 LULI - Laboratoire pour l'utilisation des lasers intenses
4 PALS Research Centre, Za Slovankou 3, 18221 Prague 8, Czech Republic
5 CTU - Czech Technical University in Prague
6 CELIA - Centre d'Etudes Lasers Intenses et Applications
Victor Malka
- Function : Author
- PersonId : 4336
- IdHAL : victor-malka
- ORCID : 0000-0002-0488-2587
- IdRef : 108077799
Jérôme Faure
- Function : Author
- PersonId : 4396
- IdHAL : jerome-faure
- ORCID : 0000-0003-0538-5774
- IdRef : 185758665
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.