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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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http://hal.in2p3.fr/in2p3-00152506
Contributor : Pascale Chambon <>
Submitted on : Thursday, June 7, 2007 - 9:22:24 AM
Last modification on : Friday, March 5, 2021 - 2:59:58 PM

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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, American Physical Society, 2007, 75, pp.065401. ⟨10.1103/PhysRevE.75.065401⟩. ⟨in2p3-00152506⟩

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