Direct evidence of gas-induced laser beam smoothing in the interaction with thin foils

R. Benocci; D. Batani; R. Dezulian; R. Redaelli; G. Lucchini; F. Canova; H. Stabile; Jérôme Faure; E. Krousky; K. Masek; M. Pfeifer; J. Skala; R. Dudzak; M. Koenig; V. Tikhonchuk; Ph. Nicolaï; Victor Malka

Direct evidence of gas-induced laser beam smoothing in the interaction with thin foils

R. Benocci ¹ D. Batani ¹ R. Dezulian ¹ R. Redaelli ¹ G. Lucchini ¹ F. Canova ^{1, 2} H. Stabile ^{1, 2} Jérôme Faure ² E. Krousky ³ K. Masek ³ M. Pfeifer ³ J. Skala ³ R. Dudzak ³ M. Koenig ⁴ V. Tikhonchuk ⁵ Ph. Nicolaï ⁵ Victor Malka ²

1 Dipartimento di Fisica "G. Occhialini," Università degli Studi di Milano Bicocca and INFM

2 LOA - Laboratoire d'optique appliquée

3 PALS Research Centre

4 LULI - Laboratoire pour l'utilisation des lasers intenses

5 CELIA - Centre d'Etudes Lasers Intenses et Applications

Abstract : The process of laser beam homogenization in a gas medium placed in front of a thin metallic foil has been studied. Experiments were performed using the Prague Asterix Laser System iodine laser [ Jungwirth et al., Phys. Plasmas 8, 2495 (2001) ] working at 0.44 μm wavelength and irradiance of about 10^15 W/cm^2. Homogenization was detected both by directly analyzing the transmitted laser beam and by studying the shock breakout on the foil rear side. Results show that the gas ionization by the laser pulse induces a strong refraction and produces an effective smoothing of large-scale intensity nonuniformities.

Keywords : plasma shock waves plasma heating by laser ionisation foils

Document type :

Journal articles

Domain :

Physics [physics] / Physics [physics] / Optics [physics.optics]

Complete list of metadatas

https://hal-polytechnique.archives-ouvertes.fr/hal-00501826
Contributor : Thuy Le <>
Submitted on : Monday, July 12, 2010 - 4:32:46 PM
Last modification on : Wednesday, July 3, 2019 - 10:48:01 AM

Direct evidence of gas-induced laser beam smoothing in the interaction with thin foils

Identifiers

Collections

Citation

Export

Metrics

291

Contact

Direct evidence of gas-induced laser beam smoothing in the interaction with thin foils

Identifiers

Collections

Citation

Export

Share

Metrics

291

Contact