Creation of Si Warm Dense Matter using an intense proton beam by the OMEGA-EP short pulse laser and simulated with 2D particle-in-cell

POSTER

Abstract

The dual OMEGA-EP short-pulse lasers were used to heat a thin Si wafer to the warm dense matter (WDM) regime and measure its temperature. The first beam (10$^{\mathrm{18}}$ W/cm$^{\mathrm{2}}$, 10 ps) irradiated a CH hemispherical cap, subsequently accelerating energetic protons and ions to heat the Si face-on. The second beam (10$^{\mathrm{18}}$ W/cm$^{\mathrm{2}}$, 5 ps) irradiated an adjacent Zn wire tip, generating an x-ray backlighting spectrum which passed through the Si hot spot and into a multipurpose spectrometer (MSPEC) to diagnose the instantaneous Si temperature at delays spanning 200 ps. Modeling predicts that the Si remains \textgreater 30 eV and \textgreater 10{\%} solid density during this time window. We present the proton energy spectra measurements from Radiochromic film and a Thomson Parabola which are used as input to simulate the temperature evolution of the Si via the 2D particle-in-cell code LSP. We show the simulation results and compare with temperature measurements from MSPEC.

Authors

  • Krish Bhutwala

    UCSD CER, University of California, San Diego

  • Joohwan Kim

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

  • Mathieu Bailly-Grandvaux

    UCSD

  • RF Heeter

    Lawrence Livermore National Laboratory, LLNL, Lawrence Livermore Natl Laboratory, Lawrence Livermore Natl Lab, Lawrence Livermore Natl. Lab

  • J Emig

    LLNL, Lawrence Livermore National Laboratory, Lawrence Livermore Natl Laboratory, Lawrence Livermore Natl. Lab

  • Edward Marley

    LLNL

  • Jacquelynne Vaughan

    UCSD

  • Dana Zimmer

    UCSD

  • Farhat Beg

    University of California, San Diego, UCSD

  • Adam Higginson

    UCSD

  • Derek Mariscal

    LLNL, Lawrence Livermore National Laboratory, Lawrence Livermore Natl Lab

  • Sarah Muller

    General Atomics

  • Phil Nilson

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

  • Wolfgang Theobald

    University of Rochester, Lab for Laser Energetics, Laboratory for Laser Energetics, LLE, LLE, Univ. of Rochester, Laboratory for Laser Energetics, U. of Rochester, Laboratory for Laser Energetics, University of Rochester

  • Christopher McGuffey

    UCSD CER, UCSD, UCSSD, CER, UCSD, USA, University of California, San Diego