Direct Observation of Strong Ion Coupling in Laser-Driven Shock-Compressed Targets

A. Ravasio, G. Gregori, A. Benuzzi-Mounaix, J. Daligault, A. Delserieys, A. Ya. Faenov, B. Loupias, N. Ozaki, M. Rabec le Gloahec, T. A. Pikuz, D. Riley, and M. Koenig
Phys. Rev. Lett. 99, 135006 – Published 28 September 2007

Abstract

In this Letter we report on a near collective x-ray scattering experiment on shock-compressed targets. A highly coupled Al plasma was generated and probed by spectrally resolving an x-ray source forward scattered by the sample. A significant reduction in the intensity of the elastic scatter was observed, which we attribute to the formation of an incipient long-range order. This speculation is confirmed by x-ray scattering calculations accounting for both electron degeneracy and strong coupling effects. Measurements from rear side visible diagnostics are consistent with the plasma parameters inferred from x-ray scattering data. These results give the experimental evidence of the strongly coupled ionic dynamics in dense plasmas.

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  • Received 7 June 2007

DOI:https://doi.org/10.1103/PhysRevLett.99.135006

©2007 American Physical Society

Authors & Affiliations

A. Ravasio1, G. Gregori2, A. Benuzzi-Mounaix1, J. Daligault3, A. Delserieys4, A. Ya. Faenov5, B. Loupias1, N. Ozaki1, M. Rabec le Gloahec1, T. A. Pikuz5, D. Riley4, and M. Koenig1

  • 1Laboratoire pour l’Utilisation de Lasers Intenses, UMR7605, CNRS–CEA, Université Paris VI–Ecole Polytechnique, 91128 Palaiseau Cedex, France
  • 2CCLRC, Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, United Kingdom, Clarendon Laboratory, University of Oxford, Parks Road, Oxford, OX1 3PU, United Kingdom
  • 3Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
  • 4School of Mathematics and Physics, Queens University of Belfast, Belfast BT7 INN, United Kingdom
  • 5Multicharged Ions Spectra Data Center of VNIIFTRI, Russian Committee of Standards, Moscow Region, 141570, Russia

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Issue

Vol. 99, Iss. 13 — 28 September 2007

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