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Journal Articles Physical Review E : Statistical, Nonlinear, and Soft Matter Physics Year : 2007

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

Abstract

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.
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in2p3-00152506 , version 1 (07-06-2007)

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E. Brambrink, T. Schlegel, G. Malka, K. U. Amthor, M. M. Aléonard, et al.. Direct evidence of strongly inhomogeneous energy deposition in target heating with laser-produced ion beams. Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, 2007, 75, pp.065401. ⟨10.1103/PhysRevE.75.065401⟩. ⟨in2p3-00152506⟩
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