Direct evidence of strongly inhomogeneous energy deposition in target heating with laser-produced ion beams

E. Brambrink; T. Schlegel; G. Malka; K. U. Amthor; M. M. Aléonard; G. Claverie; M. Gerbaux; F. Gobet; F. Hannachi; V. Méot; P. Morel; P. Nicolai; J. N. Scheurer; M. Tarisien; V. Tikhonchuk; P. Audebert

HAL : in2p3-00152506, version 1

DOI : 10.1103/PhysRevE.75.065401

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Physical Review E: Statistical, Nonlinear, and Soft Matter Physics 75 (2007) 065401

Direct evidence of strongly inhomogeneous energy deposition in target heating with laser-produced ion beams

E. Brambrink¹, T. Schlegel², G. Malka³, K. U. Amthor⁴, M. M. Aléonard³, G. Claverie³, M. Gerbaux³, F. Gobet³, F. Hannachi³, V. Méot⁵, P. Morel⁵, P. Nicolai⁶, J. N. Scheurer³, M. Tarisien³, V. Tikhonchuk⁶, P. Audebert¹

(2007)

We report on strong nonuniformities in target heating with intense, laser-produced proton beams. The observed inhomogeneity in energy deposition can strongly perturb equation of state EOS measurements with laser-accelerated ions which are planned in several laboratories. Interferometric measurements of the target expansion show different expansion velocities on the front and rear surfaces, indicating a strong difference in local temperature. The nonuniformity indicates at an additional heating mechanism, which seems to originate from electrons in the keV range.

1 :	LULI - Laboratoire pour l'utilisation des lasers intenses

2 :	GSI - Gesellschaft für Schwerionenforschung mbH

3 :	CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan

4 :	IOQ - Institut für Optik und Quantenelektronik

5 :	CEA/DAM - Direction des applications militaires

6 :	CELIA - Centre d'Etudes Lasers Intenses et Applications

Thème(s)

Physique/Physique Nucléaire Expérimentale

Physique/Physique/Physique des plasmas


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Contributeur : Pascale Chambon <>
Déposé pour le compte de : Franck GOBET <>
Soumis le : Jeudi 7 Juin 2007, 09:22:24
Dernière modification le : Jeudi 3 Juillet 2008, 11:11:57