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

Journal Article · Fri Jun 15 00:00:00 EDT 2007 · Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics

DOI:https://doi.org/10.1103/PHYSREVE.75.065401· OSTI ID:21075551

Brambrink, E; Audebert, P ^[1]; Schlegel, T ^[2]; Malka, G; Aleonard, M M; Claverie, G; Gerbaux, M; Gobet, F; Hannachi, F; Scheurer, J N; Tarisien, M ^[3]; Amthor, K U ^[4]; Meot, V; Morel, P ^[5]; Nicolai, P; Tikhonchuk, V ^[6]

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1. Laboratoire pour l'Utilisation des Lasers Intenses (LULI), Unite Mixte No. 7605 CNRS-CEA-Ecole Polytechnique-Universite Pierre et Marie Curie, Palaiseau (France)
2. Gesellschaft fuer Schwerionenforschung, Darmstadt (Germany)
3. Centre d'Etudes Nucleaires de Bordeaux-Gradignan, 33175 Gradignan (France)
4. Institut fuer Optik und Quantenelektronik, Friedrich-Schiller-Universitaet Jena (Germany)
5. CEA/DAM, Ile de France, Boite Postale 12, 91680 Bruyeres-le-Chatel (France)
6. CELIA, Universite Bordeaux 1, 33175 Gradignan (France)

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.

• OSTI ID: 21075551
• Journal Information: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, Vol. 75, Issue 6; Other Information: DOI: 10.1103/PhysRevE.75.065401; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-651X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
07 ISOTOPES AND RADIATION SOURCES
ELECTRONS
EQUATIONS OF STATE
EXPANSION
ION BEAMS
IONS
LASERS
PLASMA
PLASMA HEATING
PROTON BEAMS