Effect of magnetic field to improve energy deposition of relativistic electrons

ORAL

Abstract

A systematic study of relativistic electrons' propagation and energy deposition in a pre-assembled cylindrical plasma under controlled conditions of density and temperature with and without external magnetic field, has been carried out. Understanding the role of magnetic field in relativistic electrons' transport is important for several applications including fast ignition inertial confinement fusion. The OMEGA-60 laser with 36 beams (0.3 TW/beam, 1.5 ns square pulse) was used to compress a CH cylinder filled with Cl-doped CH foam to reach density of about 8 g/cm$^{\mathrm{3}}$ with an initial density of 0.1 g/cm$^{\mathrm{3}}$. OMEGA EP (1 kJ, 10 ps) produced a relativistic electron beam for transport studies. Modeling shows that both the rapidly growing self-generated and compressed external magnetic fields significantly improved the energy coupling to the compressed plasmas, in agreement with experiment.

*This material is based upon work supported by the Department of Energy, National Nuclear Security Administration under the NLUF program with an award number DE-FOA-0001568.

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Authors

  • Farhat Beg

    • University of California, San Diego
    • UCSD
    • UC San Diego

  • D. Kawahito

    • Center for Energy Research, UCSD
    • University of California, San Diego
    • UCSD
    • UC San Diego

  • M. Dozières

    • University of California, San Diego
    • UC San Diego

  • P. Forestier-Colleoni

    • UC San Diego

  • Christopher McGuffey

    • UC San Diego
    • University of California, San Diego
    • UCSD

  • Stephanie Hansen

    • Sandia National Lab
    • Sandia National Laboratories

  • Mathieu Bailly-Grandvaux

    • University of California, San Diego
    • UC San Diego
    • UCSD

  • K. Bhutwala

    • UC San Diego

  • Mingsheng Wei

    • Laboratory for Laser Energetics
    • LLE

  • Christine Krauland

    • General Atomics
    • Lawrence Livermore National Laboratory

  • Pierre Gourdain

    • University of Rochester

  • J. R. Davies

    • University of Rochester
    • Laboratory for Laser Energetics
    • University of Rochester, NY 14623, USA

  • K. Matsuo

    • University of Osaka

  • S. Fujioka

    • University of Osaka

  • Michael Campbell

    • Laboratory for Laser Energetics, U. of Rochester
    • LLE
    • University of Rochester, Laboratory for Laser Energetics
    • University of Rochester - LLE
    • Laboratory for Laser Energetics, University of Rochester
    • Laboratory for Laser Energetics

  • J. Peebles

    • University of Rochester
    • Laboratory for Laser Energetics

  • J. Santos

    • Université de Bordeaux

  • Dimitri Batani

    • Université de Bordeaux
    • Centre Lasers Intenses et Applications

  • S. Zhang

    • UC San Diego