Determination of Electron-Heated Target Temperatures in Petawatt Laser Experiments Using Soft X-Ray Diagnostics

POSTER

Abstract

The study of the transport of electrons, and the flow of energy into a solid target or dense plasma, is instrumental in the development of fast ignition inertial confinement fusion. Various solid targets (layered foils, cones, wires) were irradiated with the Titan Laser (4x10$^{19}$ Wcm$^{-2})$ at LLNL. Analysis has been done on soft x-ray images, spectra, and streaked images to determine the thermal electron temperatures on target back surfaces. Three independent methods (Soft X-Ray Spectrometer, 68eV XUV Imager, and 256eV XUV Imager) were used to confirm temperatures, while a fourth diagnostic (Streaked 68eV XUV Imager) provided time-resolved temperature information.

*This work was performed under the auspices of the U.S. Dept of Energy by University of CA, Lawrence Livermore National Laboratory under Contract W-7405-Eng-48.

Authors

  • T.Y. Ma

    • University of California-San Diego
    • Department of Mechanical and Aerospace Engineering, University of California-San Diego, La Jolla, CA

  • F.N. Beg

    • UCSD
    • Department of Mechanical and Aerospace Engineering, University of California San Diego
    • U.C. San Diego, Mechanical and Aerospace Engineering, La Jolla CA
    • University of California-San Diego
    • Department of Mechanical and Aerospace Engineering, University of California-San Diego
    • Department of Mechanical and Aerospace Engineering, University of California-San Diego, La Jolla, CA

  • A.G. Macphee

    • Lawrence Livermore National Laboratory
    • Lawrence Livermore National Laboratory, Livermore CA 94550
    • Lawrence Livermore National Lab

  • Hyun-kyung Chung

    • Lawrence Livermore National Laboratory

  • M. Key

    • Lawrence Livermore National Laboratory
    • Lawrence Livermore National Laboratory, Livermore CA 94550
    • Lawrence Livermore National Lab

  • A.J. Mackinnon

    • Lawrence Livermore National Laboratory
    • Lawrence Livermore National Laboratory, Livermore CA 94550

  • Stephen Hatchett

    • Lawrence Livermore National Laboratory

  • R.B. Stephens

    • General Atomics
    • General Atomics, San Diego, CA

  • K. Akli

    • General Atomics
    • College of Mathematical and Physical Sciences, The Ohio State University, Columbus, OH

  • L. Van Woerkom

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

  • Bingbing Zhang

    • University of California-Davis