Fast Electron Heating in Cone-wire Targets

POSTER

Abstract

We present results of fast electron heating of 10$\mu $m diameter, 1mm Cu wires. In the experiments, an 80J, 1ps, 1053nm pulse is focused into a Au cone, generating energetic electrons which heat the wire. 68eV XUV images obtained with a multilayer spherical mirror are compared with simulations to indicate peak wire heating of $\sim $350eV near the cone tip falling with a scalelength of $\sim $100$\mu $m. K$\alpha $ linewidth measurements were compared to simulations of K$\alpha $ broadening to estimate average wire temperatures of $\sim $160eV. LSP simulations predict a cone tip temperature of $\sim $350eV and a 120$\mu $m scalelength of heating along the wire. This work is consistent with an ohmic limiting of the electron penetration to the observed 100$\mu $m scalelength.

Authors

  • J.A. King

    • University of California, San Diego, California 92093-0417

  • Michael H. Key

    • Lawrence Livermore National Laboratory

  • K.U. Akli

  • Siegfried Glenzer

    • Lawrence Livermore Nat. Lab.
    • Lawrence Livermore National Laboratory, University of California, P.O. Box 808, Livermore, California, 94551

  • Stephanie Hansen

    • LLNL

  • Steve Hatchett

    • Lawrence Livermore National Laboratory, Livermore, CA 94550 USA

  • D. Hey

  • Jeffrey Koch

  • A.J. Mackinnon

  • P. Patel

  • R. Towm

    • Lawrence Livermore National Laboratory
    • Lawrence Livermore National Lab
    • LLNL, CA, USA

  • Scott Wilks

    • Lawrence Livermore National Laboratory, Livermore, California 94550
    • Lawrence Livermore National Laboratory
    • LLNL

  • Richard Freeman

    • College of Mathematical and Physical Sciences, Ohio State University, Columbus, Ohio 43210

  • G. Gregori

    • Rutherford Appleton Laboratory, Chilton, Oxfordshire, UK

  • K.L. Lancaster

  • Peter Norreys

    • Rutherford Appleton Laboratory, Chilton, Oxon, OX11 OQX, United Kingdom
    • CCLRC Rutherford Appleton Laboratory
    • Rutherford-Appleton Laboratory
    • Plasma Physics Group, Central Laser Facility, Rutherford Appleton Laboratory

  • R.B. Stephens

    • General Atomics, San Diego, California 92186
    • General Atomics

  • B. Zhang

    • Department of Applied Science, University of California Davis, Davis, California 95616