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Supra-thermal electron beam stopping power and guiding in dense plasmas

Published online by Cambridge University Press:  18 March 2013

JOÃO JORGE SANTOS
Affiliation:
Univ. Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405 Talence, France (santos@celia.u-bordeaux1.fr)
D. BATANI
Affiliation:
Univ. Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405 Talence, France (santos@celia.u-bordeaux1.fr)
S. D. BATON
Affiliation:
LULI, Ecole Polytechnique CNRS/CEA/UPMC, 91128 Palaiseau Cedex, France
F. N. BEG
Affiliation:
University of California, San Diego, La Jolla, California 92093, USA
T. CECCOTTI
Affiliation:
CEA, IRAMIS, SPAM, F-91191 Gif-sur-Yvette, France
A. DEBAYLE
Affiliation:
ETSI Aeronáuticos, Universidad Politécnica de Madrid, Madrid, Spain
F. DORCHIES
Affiliation:
Univ. Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405 Talence, France (santos@celia.u-bordeaux1.fr)
J.-L. FEUGEAS
Affiliation:
Univ. Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405 Talence, France (santos@celia.u-bordeaux1.fr)
C. FOURMENT
Affiliation:
Univ. Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405 Talence, France (santos@celia.u-bordeaux1.fr)
L. GREMILLET
Affiliation:
CEA, DAM, DIF, F-91297 Arpajon, France
J. J. HONRUBIA
Affiliation:
ETSI Aeronáuticos, Universidad Politécnica de Madrid, Madrid, Spain
S. HULIN
Affiliation:
Univ. Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405 Talence, France (santos@celia.u-bordeaux1.fr)
A. MORACE
Affiliation:
Dipartimento di Fisica, Università di Milano-Bicocca, Milano 20126, Italy
P. NICOLAÏ
Affiliation:
Univ. Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405 Talence, France (santos@celia.u-bordeaux1.fr)
F. PÉREZ
Affiliation:
LULI, Ecole Polytechnique CNRS/CEA/UPMC, 91128 Palaiseau Cedex, France
H. SAWADA
Affiliation:
University of California, San Diego, La Jolla, California 92093, USA
H.-P. SCHLENVOIGT
Affiliation:
LULI, Ecole Polytechnique CNRS/CEA/UPMC, 91128 Palaiseau Cedex, France
V. T. TIKHONCHUK
Affiliation:
Univ. Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405 Talence, France (santos@celia.u-bordeaux1.fr)
X. VAISSEAU
Affiliation:
Univ. Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405 Talence, France (santos@celia.u-bordeaux1.fr)
B. VAUZOUR
Affiliation:
Univ. Bordeaux, CNRS, CEA, CELIA (Centre Lasers Intenses et Applications), UMR 5107, F-33405 Talence, France (santos@celia.u-bordeaux1.fr)
M. WEI
Affiliation:
General Atomics, San Diego, California 92121, USA

Abstract

Fast-electron beam stopping mechanisms in media ranging from solid to warm dense matter have been investigated experimentally and numerically. Laser-driven fast electrons have been transported through solid Al targets and shock-compressed Al and plastic foam targets. Their propagation has been diagnosed via rear-side optical self-emission and Kα X-rays from tracer layers. Comparison between measurements and simulations shows that the transition from collision-dominated to resistive field-dominated energy loss occurs for a fast-electron current density ~5 × 1011 A cm−2. The respective increases in the stopping power with target density and resistivity have been detected in each regime. Self-guided propagation over 200μm has been observed in radially compressed targets due to ~1kT magnetic fields generated by resistivity gradients at the converging shock front.

Type
Papers
Copyright
Copyright © Cambridge University Press 2013 

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