skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Comparative spectra and efficiencies of ions laser-accelerated forward from the front and rear surfaces of thin solid foils

Abstract

The maximum energy of protons that are accelerated forward by high-intensity, short-pulse lasers from either the front or rear surfaces of thin metal foils is compared for a large range of laser intensities and pulse durations. In the regime of moderately long laser pulse durations (300-850 fs), and for high laser intensities [(1-6)x10{sup 19} W/cm{sup 2}], rear-surface acceleration is shown experimentally to produce higher energy particles with smaller divergence and a higher efficiency than front-surface acceleration. For similar laser pulse durations but for lower laser intensities (2x10{sup 18} W cm{sup -2}), the same conclusion is reached from direct proton radiography of the electric fields associated with proton acceleration from the rear surface. For shorter (30-100 fs) or longer (1-10 ps) laser pulses, the same predominance of rear-surface acceleration in producing the highest energy protons is suggested by simulations and by comparison of analytical models with measured values. For this purpose, we have revised our previous analytical model of rear-surface acceleration [J. Fuchs et al., Nat. Phys. 2, 48 (2006)] to adapt it to the very short pulse durations. Finally, it appears, for the explored parameters, that rear-surface acceleration is the dominant mechanism.

Authors:
 [1];  [2];  [3]; ; ;  [1];  [3];  [4];  [3]; ;  [5]; ; ; ;  [4]; ; ;  [1];  [4];  [6] more »; ; ;  [7];  [5];  [6];  [8] « less
  1. General Atomics, San Diego, California 92121 (United States)
  2. (France)
  3. (United States)
  4. LULI, Ecole Polytechnique, CNRS-CEA, UPMC, route de Saclay, 91128 Palaiseau (France)
  5. University of California, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
  6. (Germany)
  7. Technische Universitat Darmstadt, 64289 Darmstadt (Germany)
  8. Max-Planck-Institut fuer Quantenoptik, 85748 Garching (Germany) (and others)
Publication Date:
OSTI Identifier:
20975001
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 14; Journal Issue: 5; Other Information: DOI: 10.1063/1.2720373; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ACCELERATION; COMPARATIVE EVALUATIONS; EFFICIENCY; ELECTRIC FIELDS; FOILS; IONS; LASERS; METALS; PLASMA; PROTON RADIOGRAPHY; PROTONS; PULSES; REFRACTIVE INDEX; SOLIDS; SPECTRA; SURFACES

Citation Formats

Fuchs, J., LULI, Ecole Polytechnique, CNRS-CEA, UPMC, route de Saclay, 91128 Palaiseau, Physics Department, MS-220, University of Nevada, Reno, Nevada 89557, Sentoku, Y., Cowan, T. E., Kemp, A., Physics Department, MS-220, University of Nevada, Reno, Nevada 89557, D'Humieres, E., Physics Department, MS-220, University of Nevada, Reno, Nevada 89557, Cobble, J., Fernandez, J. C., Audebert, P., Antici, P., Gauthier, J.-C., Popescu, H., Nikroo, A., Campbell, E. M., Stephens, R., Brambrink, E., Technische Universitat Darmstadt, 64289 Darmstadt, Blazevic, A., Geissel, M., Roth, M., Hegelich, M., Max-Planck-Institut fuer Quantenoptik, 85748 Garching, and Karsch, S. Comparative spectra and efficiencies of ions laser-accelerated forward from the front and rear surfaces of thin solid foils. United States: N. p., 2007. Web. doi:10.1063/1.2720373.
Fuchs, J., LULI, Ecole Polytechnique, CNRS-CEA, UPMC, route de Saclay, 91128 Palaiseau, Physics Department, MS-220, University of Nevada, Reno, Nevada 89557, Sentoku, Y., Cowan, T. E., Kemp, A., Physics Department, MS-220, University of Nevada, Reno, Nevada 89557, D'Humieres, E., Physics Department, MS-220, University of Nevada, Reno, Nevada 89557, Cobble, J., Fernandez, J. C., Audebert, P., Antici, P., Gauthier, J.-C., Popescu, H., Nikroo, A., Campbell, E. M., Stephens, R., Brambrink, E., Technische Universitat Darmstadt, 64289 Darmstadt, Blazevic, A., Geissel, M., Roth, M., Hegelich, M., Max-Planck-Institut fuer Quantenoptik, 85748 Garching, & Karsch, S. Comparative spectra and efficiencies of ions laser-accelerated forward from the front and rear surfaces of thin solid foils. United States. doi:10.1063/1.2720373.
Fuchs, J., LULI, Ecole Polytechnique, CNRS-CEA, UPMC, route de Saclay, 91128 Palaiseau, Physics Department, MS-220, University of Nevada, Reno, Nevada 89557, Sentoku, Y., Cowan, T. E., Kemp, A., Physics Department, MS-220, University of Nevada, Reno, Nevada 89557, D'Humieres, E., Physics Department, MS-220, University of Nevada, Reno, Nevada 89557, Cobble, J., Fernandez, J. C., Audebert, P., Antici, P., Gauthier, J.-C., Popescu, H., Nikroo, A., Campbell, E. M., Stephens, R., Brambrink, E., Technische Universitat Darmstadt, 64289 Darmstadt, Blazevic, A., Geissel, M., Roth, M., Hegelich, M., Max-Planck-Institut fuer Quantenoptik, 85748 Garching, and Karsch, S. Tue . "Comparative spectra and efficiencies of ions laser-accelerated forward from the front and rear surfaces of thin solid foils". United States. doi:10.1063/1.2720373.
@article{osti_20975001,
title = {Comparative spectra and efficiencies of ions laser-accelerated forward from the front and rear surfaces of thin solid foils},
author = {Fuchs, J. and LULI, Ecole Polytechnique, CNRS-CEA, UPMC, route de Saclay, 91128 Palaiseau and Physics Department, MS-220, University of Nevada, Reno, Nevada 89557 and Sentoku, Y. and Cowan, T. E. and Kemp, A. and Physics Department, MS-220, University of Nevada, Reno, Nevada 89557 and D'Humieres, E. and Physics Department, MS-220, University of Nevada, Reno, Nevada 89557 and Cobble, J. and Fernandez, J. C. and Audebert, P. and Antici, P. and Gauthier, J.-C. and Popescu, H. and Nikroo, A. and Campbell, E. M. and Stephens, R. and Brambrink, E. and Technische Universitat Darmstadt, 64289 Darmstadt and Blazevic, A. and Geissel, M. and Roth, M. and Hegelich, M. and Max-Planck-Institut fuer Quantenoptik, 85748 Garching and Karsch, S.},
abstractNote = {The maximum energy of protons that are accelerated forward by high-intensity, short-pulse lasers from either the front or rear surfaces of thin metal foils is compared for a large range of laser intensities and pulse durations. In the regime of moderately long laser pulse durations (300-850 fs), and for high laser intensities [(1-6)x10{sup 19} W/cm{sup 2}], rear-surface acceleration is shown experimentally to produce higher energy particles with smaller divergence and a higher efficiency than front-surface acceleration. For similar laser pulse durations but for lower laser intensities (2x10{sup 18} W cm{sup -2}), the same conclusion is reached from direct proton radiography of the electric fields associated with proton acceleration from the rear surface. For shorter (30-100 fs) or longer (1-10 ps) laser pulses, the same predominance of rear-surface acceleration in producing the highest energy protons is suggested by simulations and by comparison of analytical models with measured values. For this purpose, we have revised our previous analytical model of rear-surface acceleration [J. Fuchs et al., Nat. Phys. 2, 48 (2006)] to adapt it to the very short pulse durations. Finally, it appears, for the explored parameters, that rear-surface acceleration is the dominant mechanism.},
doi = {10.1063/1.2720373},
journal = {Physics of Plasmas},
number = 5,
volume = 14,
place = {United States},
year = {Tue May 15 00:00:00 EDT 2007},
month = {Tue May 15 00:00:00 EDT 2007}
}