Fast-electron transport and heating of solid targets in high-intensity laser interactions measured by K{alpha} fluorescence

Journal Article · Sat Apr 15 00:00:00 EDT 2006 · Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics

DOI:https://doi.org/10.1103/PHYSREVE.73.0· OSTI ID:20779246

Martinolli, E; Koenig, M; Baton, S D; Santos, J J; Amiranoff, F ^[1]; Batani, D; Perelli-Cippo, E; Scianitti, F ^[2]; Gremillet, L; Melizzi, R; Decoster, A; Rousseaux, C ^[3]; Hall, T A ^[4]; Key, M H; Snavely, R; MacKinnon, A J; King, J A ^[5]; Freeman, R R ^[6]; Stephens, R ^[7]; Neely, D ^[8]

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1. Laboratoire pour l'Utilisation des Lasers Intenses, UMR7605, CNRS-CEA-Universite Paris VI-Ecole Polytechnique, 91128 Palaiseau (France)
2. Dipartimento di Fisica 'G. Occhialini', Universita di Milano-Bicocca, Piazza della Scienza 3, 20126 Milan (Italy)
3. Commissariat a l'Energie Atomique-DAM, Bruyeres-le-Chatel (France)
4. University of Essex, Colchester CO4 3SQ (United Kingdom)
5. Lawerence Livermore National Laboratory, Livermore, California (United States)
6. University of California Davis, Davis, California (United States)
7. Inertial Fusion Technology Division, Energy Group, General Atomics, San Diego, California 92121 (United States)
8. Central Laser Facility, Rutherford Appleton Laboratory, Chilton (United Kingdom)

We present experimental results on fast-electron energy deposition into solid targets in ultrahigh intensity laser-matter interaction. X-ray K{alpha} emission spectroscopy with absolute photon counting served to diagnose fast-electron propagation in multilayered targets. Target heating was measured from ionization-shifted K{alpha} emission. Data show a 200 {mu}m fast-electron range in solid Al. The relative intensities of spectrally shifted Al K{alpha} lines imply a mean temperature of a few tens of eV up to a 100 {mu}m depth. Experimental results suggest refluxing of the electron beam at target rear side. They were compared with the predictions of both a collisional Monte Carlo and a collisional-electromagnetic, particle-fluid transport code. The validity of the code modeling of heating in such highly transient conditions is discussed.

• OSTI ID: 20779246
• Journal Information: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, Vol. 73, Issue 4; Other Information: DOI: 10.1103/PhysRevE.73.046402; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-651X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALUMINIUM
CHARGED-PARTICLE TRANSPORT
ELECTRON BEAMS
ELECTRONS
EMISSION SPECTRA
EMISSION SPECTROSCOPY
EV RANGE 10-100
FLUORESCENCE
IONIZATION
LASERS
MONTE CARLO METHOD
PHOTONS
PLASMA
PLASMA HEATING
SIMULATION
SOLIDS
SPECTRAL SHIFT
X-RAY SPECTRA