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Experimental observations of transport of picosecond laser generated electrons in a nail-like target

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Author(s)

  • J. Pasley
  • M. Wei
  • E. Shipton
  • S. Chen
  • T. Ma
  • F. N. Beg
  • N. Alexander
  • R. Stephens
  • A. G. MacPhee
  • D. Hey
  • S. Le Pape
  • P. Patel
  • A. MacKinnon
  • M. Key
  • D. Offermann
  • A. Link
  • E. Chowdhury
  • L. Van-Woerkom
  • R. R. Freeman

Department/unit(s)

Publication details

JournalPhysics of Plasmas
DatePublished - Dec 2007
Issue number12
Volume14
Number of pages4
Pages (from-to)-
Original languageEnglish

Abstract

The transport of relativistic electrons, generated by the interaction of a high intensity (2 x 10(20) W/cm(2)) laser, has been studied in a nail-like target comprised of a 20 mu m diameter solid copper wire, coated with similar to 2 mu m of titanium, with an 80 mu m diameter hemispherical termination. A similar to 500 fs, similar to 200 J pulse of 1.053 mu m laser light produced by the Titan Laser at Lawrence Livermore National Laboratory was focused to a similar to 20 mu m diameter spot centered on the flat face of the hemisphere. K-alpha fluorescence from the Cu and Ti regions was imaged together with extreme ultraviolet (XUV) emission at 68 and 256 eV. Results showed a quasiexponential decline in K-alpha emission along the wire over a distance of a few hundred microns from the laser focus, consistent with bulk Ohmic inhibition of the relativistic electron transport. Weaker K-alpha and XUV emission on a longer scale length showed limb brightening suggesting a transition to enhanced transport at the surface of the wire. (C) 2007 American Institute of Physics.

    Research areas

  • PIC SIMULATION, FAST IGNITION

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