We describe an experiment on isochoric heating of matter by intense laser-accelerated protons. The experiment was performed using the LULI 100 TW facility with 15-20 J on target energy and > 10(19) W.cm(-2) maximum focused intensity. Focusing the laser on a 10 micron thick An foil, we accelerated forward a laminar proton beam with a maximum energy of 16 MeV. This proton beam irradiated and heated a secondary target positioned after a variable vacuum gap. The heating was diagnosed by I D and 2D time-resolved measurements of the optical self-emission of the heated target rear-surface. Detailed results as a function of the Z and the thickness of the secondary target as well as analysis, including a full modelling of the target heating with a 2D hydro-code (DUED) coupled to a proton energy deposition code, were obtained. We have also studied the efficiency of heating as a function of the primary target topology, i.e. either flat, which results in a diverging proton beam, or curved, which has the ability of focusing partly the proton beam.

Isochoric heating of matter by laser-accelerated high-energy protons / Antici, Patrizio; J., Fuchs; Atzeni, Stefano; A., Benuzzi; E., Brambrink; M., Esposito; M., Koenig; A., Ravasio; J., Schreiber; Schiavi, Angelo; P., Audebert. - In: JOURNAL DE PHYSIQUE IV. - ISSN 1155-4339. - STAMPA. - 133(2006), pp. 1077-1079. ((Intervento presentato al convegno 4th International Conference on Inertial Fusion Sciences and Applications tenutosi a Biarritz, FRANCE nel SEP 04-09, 2005 [10.1051/jp4:2006133218].

Isochoric heating of matter by laser-accelerated high-energy protons

ANTICI, PATRIZIO;ATZENI, Stefano;SCHIAVI, ANGELO;
2006

Abstract

We describe an experiment on isochoric heating of matter by intense laser-accelerated protons. The experiment was performed using the LULI 100 TW facility with 15-20 J on target energy and > 10(19) W.cm(-2) maximum focused intensity. Focusing the laser on a 10 micron thick An foil, we accelerated forward a laminar proton beam with a maximum energy of 16 MeV. This proton beam irradiated and heated a secondary target positioned after a variable vacuum gap. The heating was diagnosed by I D and 2D time-resolved measurements of the optical self-emission of the heated target rear-surface. Detailed results as a function of the Z and the thickness of the secondary target as well as analysis, including a full modelling of the target heating with a 2D hydro-code (DUED) coupled to a proton energy deposition code, were obtained. We have also studied the efficiency of heating as a function of the primary target topology, i.e. either flat, which results in a diverging proton beam, or curved, which has the ability of focusing partly the proton beam.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11573/471274
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