Long duration x-ray source for laboratory photoionized plasmas

POSTER

Abstract

Long duration, i.e. tens of ns, broadband x-ray sources are important to perform laboratory photoionized plasma experiments relevant to astrophysics. In a series of experiments performed at the OMEGA EP laser facility we have used the Gatling-Gun source to produce an x-ray drive that lasts for 30ns and has a radiation temperature of approximately 90eV. The Gatling-Gun source is comprised of a three Cu hohlraum arrangement. Each holhraum is filled with TPX foam and is driven by a 10ns-square pulsed laser beam with 4.4kJ of UV laser energy1. The total source duration of 30ns is achieved by driving the three hohlraums sequentially in time. The radiation temperature is monitored with a VISAR diagnostic to check the source’s performance consistency. We present systematic measurements of the radiation temperature and x-ray source performance obtained from VISAR data recorded over two series of experiments performed OMEGA EP. Also, we have used the 4ω probe laser available at OMEGA EP to observe the effect of the Cu/TPX plasma blow off from the hohlraum.

1D. Martinez, 2017 Annual OLUG Workshop.


Presenters

  • R. P. Schoenfeld

    Univ of Nevada - Reno, Physics Department, University of Nevada, Reno, Nevada

Authors

  • R. P. Schoenfeld

    Univ of Nevada - Reno, Physics Department, University of Nevada, Reno, Nevada

  • Roberto Claudio Mancini

    Univ of Nevada - Reno, University of Nevada - Reno, Physics Department, University of Nevada, Reno, Nevada

  • D. C. Mayes

    University of Nevada - Reno, Univ of Nevada - Reno, Physics Department, University of Nevada, Reno, Nevada

  • Robert F Heeter

    Lawrence Livermore Natl Lab, Lawrence Livermore National Laboratory, Livermore, California

  • D. Martinez

    Lawrence Livermore Natl Lab, Lawrence Livermore National Laboratory, Livermore, California

  • Peter M Celliers

    Lawrence Livermore Natl Lab, Lawrence Livermore National Lab, Lawrence Livermore National Laboratory, Lawrence Livermore National Laboratory, Livermore, California

  • Sean P Regan

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