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Phys Rev E Stat Nonlin Soft Matter Phys. 2001 Nov;64(5 Pt 2):056412. Epub 2001 Oct 29.

Direct observation of the ponderomotive force effects in short-scale-length laser plasmas by frequency-domain interferometry.

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1
Laboratoire pour l'Utilisation des Lasers Intenses, UMR7605, CNRS-CEA, Université Paris VI, Ecole Polytechnique, 91128 Palaiseau Cedex, France.

Abstract

We report on single-shot frequency-domain interferometric measurements showing space- and time-resolved ponderomotive electron density profile steepening of a short-scale-length ultraintense laser-produced plasma. The density gradient scale length is varied by applying a time-delayed laser prepulse. The measured absolute position of the critical density surface is found to be in agreement with one-dimensional hydrodynamic simulations for the range of scale lengths studied.

PMID:
11736106
DOI:
10.1103/PhysRevE.64.056412
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