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

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 measuremen...

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Published inPhysical review. E, Statistical, nonlinear, and soft matter physics Vol. 75; no. 6 Pt 2; p. 065401
Main Authors Brambrink, E, Schlegel, T, Malka, G, Amthor, K U, Aléonard, M M, Claverie, G, Gerbaux, M, Gobet, F, Hannachi, F, Méot, V, Morel, P, Nicolai, P, Scheurer, J N, Tarisien, M, Tikhonchuk, V, Audebert, P
Format Journal Article
LanguageEnglish
Published United States 01.06.2007
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Summary: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.
ISSN:1539-3755
1550-2376
DOI:10.1103/PhysRevE.75.065401