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Title: Laser-driven ion acceleration with hollow laser beams

Abstract

The laser-driven acceleration of protons from thin foils irradiated by hollow high-intensity laser beams in the regime of target normal sheath acceleration (TNSA) is reported for the first time. The use of hollow beams aims at reducing the initial emission solid angle of the TNSA source, due to a flattening of the electron sheath at the target rear side. The experiments were conducted at the PHELIX laser facility at the GSI Helmholtzzentrum für Schwerionenforschung GmbH with laser intensities in the range from 10{sup 18} W cm{sup −2} to 10{sup 20} W cm{sup −2}. We observed an average reduction of the half opening angle by (3.07±0.42)° or (13.2±2.0)% when the targets have a thickness between 12 μm and 14 μm. In addition, the highest proton energies were achieved with the hollow laser beam in comparison to the typical Gaussian focal spot.

Authors:
;  [1];  [2]; ;  [3];  [2];  [4];  [2]; ; ;  [5];  [3]
  1. Goethe-Universität Frankfurt am Main, 60323 Frankfurt (Germany)
  2. (Germany)
  3. GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt (Germany)
  4. Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden (Germany)
  5. Technische Universität Darmstadt, 64277 Darmstadt (Germany)
Publication Date:
OSTI Identifier:
22408017
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 1; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ELECTRONS; EMISSION; FOILS; LASER TARGETS; LASERS; PHOTON BEAMS; PLASMA SHEATH; PROTONS; THICKNESS

Citation Formats

Brabetz, C., E-mail: c.brabetz@gsi.de, Kester, O., GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Busold, S., Bagnoud, V., Helmholtz-Institut Jena, 07743 Jena, Cowan, T., Technische Universität Dresden, 01069 Dresden, Deppert, O., Jahn, D., Roth, M., and Schumacher, D. Laser-driven ion acceleration with hollow laser beams. United States: N. p., 2015. Web. doi:10.1063/1.4905638.
Brabetz, C., E-mail: c.brabetz@gsi.de, Kester, O., GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Busold, S., Bagnoud, V., Helmholtz-Institut Jena, 07743 Jena, Cowan, T., Technische Universität Dresden, 01069 Dresden, Deppert, O., Jahn, D., Roth, M., & Schumacher, D. Laser-driven ion acceleration with hollow laser beams. United States. doi:10.1063/1.4905638.
Brabetz, C., E-mail: c.brabetz@gsi.de, Kester, O., GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Busold, S., Bagnoud, V., Helmholtz-Institut Jena, 07743 Jena, Cowan, T., Technische Universität Dresden, 01069 Dresden, Deppert, O., Jahn, D., Roth, M., and Schumacher, D. Thu . "Laser-driven ion acceleration with hollow laser beams". United States. doi:10.1063/1.4905638.
@article{osti_22408017,
title = {Laser-driven ion acceleration with hollow laser beams},
author = {Brabetz, C., E-mail: c.brabetz@gsi.de and Kester, O. and GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt and Busold, S. and Bagnoud, V. and Helmholtz-Institut Jena, 07743 Jena and Cowan, T. and Technische Universität Dresden, 01069 Dresden and Deppert, O. and Jahn, D. and Roth, M. and Schumacher, D.},
abstractNote = {The laser-driven acceleration of protons from thin foils irradiated by hollow high-intensity laser beams in the regime of target normal sheath acceleration (TNSA) is reported for the first time. The use of hollow beams aims at reducing the initial emission solid angle of the TNSA source, due to a flattening of the electron sheath at the target rear side. The experiments were conducted at the PHELIX laser facility at the GSI Helmholtzzentrum für Schwerionenforschung GmbH with laser intensities in the range from 10{sup 18} W cm{sup −2} to 10{sup 20} W cm{sup −2}. We observed an average reduction of the half opening angle by (3.07±0.42)° or (13.2±2.0)% when the targets have a thickness between 12 μm and 14 μm. In addition, the highest proton energies were achieved with the hollow laser beam in comparison to the typical Gaussian focal spot.},
doi = {10.1063/1.4905638},
journal = {Physics of Plasmas},
number = 1,
volume = 22,
place = {United States},
year = {Thu Jan 15 00:00:00 EST 2015},
month = {Thu Jan 15 00:00:00 EST 2015}
}