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Lateral hot electron transport and ion acceleration in femtosecond laser pulse interaction with thin foils

Source: Phys. Plasmas 17, 013102 (2010); doi:10.1063/1.3276524

Published 8 January 2010

KEYWORDS and PACS
Keywords
PACS
  • 52.25.Fi
    Plasma transport properties
  • 52.65.Rr
    Particle-in-cell method (plasma simulation)
  • 52.38.Dx
    Laser light absorption in plasmas
  • 52.50.Jm
    Plasma production and heating by laser beams
  • YEAR: 2010
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PUBLICATION DATA
ISSN:
1553-9601 (online)
Publisher:
AIP is a member of CrossRef AIP
J. Psikal,1,2 V. T. Tikhonchuk,2 J. Limpouch,1 and O. Klimo1
1Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Brehova 7, 115 19 Praha 1, Czech Republic
2Centre Lasers et Applications, Université Bordeaux 1-CNRS-CEA, 351 Cours de la Libération, 334 05 Talence, France
Hot electron transport along the target surface out of the laser-irradiated spot plays an important role in such applications as ion acceleration or fast ignition of fusion reactions. In this paper, the lateral electron transport in a thin foil, limited in transverse sizes, is studied by numerical particle-in-cell simulations for two linear polarizations (p and s) of femtosecond laser pulse incident on a foil at various angles. Two mechanisms of the transport are identified: the first one is due to hot electron recirculation across the foil and the second is electron guiding along the foil surface by quasistatic magnetic and electric fields. It is demonstrated that the second mechanism takes place for larger incidence angles, although the recirculation is still important. The ions accelerated from a lateral foil edge, which is out of the laser focal spot, can have higher energies than the ions from the rear foil side. ©2010 American Institute of Physics
History: Received 3 August 2009; accepted 2 December 2009; published 8 January 2010
Permalink: http://link.aip.org/link/?PHPAEN/17/013102/1

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