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Experimental Investigation of MeV X-ray Spectra and Dose Scaling in High-Energy-Density Plasmas in the multi-picosecond regime

POSTER

Abstract

X-ray backlighting aids in extracting various physical properties from the system. The use of high-intensity lasers focused on high-Z foil targets produce relativistic electrons that generate MeV photons via Bremsstrahlung, Compton scattering, and synchrotron emission. The advantages over existing sources include smaller spot size, shorter pulse duration, tailorable spectra, and flexible configurations. This enables imaging with higher spatial and temporal resolution and multiple fields of view. However, certain limiting factors such as energy conversion efficiency, spectra optimization, and source stability must be addressed to achieve such a source. Recent experiments with 1 mm thick W targets at the OMEGA-EP laser explore MeV X-ray spectra and dose scaling with intensity (> 1019 W/cm2), energy (0.125 - 1.25 KJ), and pulse duration (0.5 -10 ps). We also report on shots using CH-coated targets with the goal of increased Bremsstrahlung production from increased laser-energy coupling and enhanced electron temperature. The resulting spectra were obtained using an iterative unfolding algorithm based on VPIC and MNCP transport codes that model the generation of hot-electrons and X-rays. For more details, we encourage you to refer to the contributed talk presented by Dr. Brian J. Albright.

Presenters

  • Alemayehu Bogale

    University of California, San Diego

Authors

  • Alemayehu Bogale

    University of California, San Diego

  • Farhat Beg

    University of California, San Diego, University of California San Diego, Center for Energy Research UC San Diego, San Diego, CA 92093

  • Joshua E Coleman

    Los Alamos Natl Lab

  • Juan C Fernandez

    Los Alamos Natl Lab

  • Rebecca J Fitzgarrald

    University of Michigan

  • Cort C Gautier

    Los Alamos National Laboratory, Los Alamos, NM 87544, USA, Los Alamos National Laboratory, Los Alamos National Laboratory, USA

  • Chengkun Huang

    Los Alamos Natl Lab, Los Alamos National Laboratory, Los Alamos, NM 87544, USA

  • Christopher E Hamilton

    Los Alamos National Laboratory, Los Alamos, NM 87544, USA, Los Alamos National Laboratory, LANL, Los Alamos Natl Lab

  • James Hunter

    Los Alamos National Laboratory, Los Alamos, NM 87544, USA, Los Alamos National Laboratory, LANL, Los Alamos Natl Lab

  • Marc Klasky

    Los Alamos National Laboratory, LANL

  • Scott V Luedtke

    Los Alamos National Laboratory

  • Albert J Mendez

    Los Alamos National Laboratory

  • Tyler Mix

    Los Alamos National Laboratory, Los Alamos, NM 87544, USA, LANL, Los Alamos Natl Lab, Los Alamos National Lab

  • Sasi Palaniyappan

    Los Alamos Natl Lab, Los Alamos National Laboratory, Los Alamos National Laboratory, Los Alamos, NM 87544, USA, Los Alamos National Lab

  • Matthew Schmitt

    Los Alamos National Laboratory

  • Alexander G Seaton

    Los Alamos National Laboratory, Los Alamos National Laboratory, Los Alamos, NM 87544, USA

  • Avneet Sood

    Los Alamos National Laboratory, Los Alamos, NM 87544, USA, Los Alamos National Laboratory, LANL, Los Alamos Natl Lab

  • David Stark

    Los Alamos National Laboratory

  • Christopher Tomkins

    Los Alamos National Laboratory, Los Alamos, NM 87544, USA, Los Alamos National Laboratory, LANL, Los Alamos Natl Lab

  • Justin Twardowski

    The Ohio State University, OSU

  • Ashlyn Van Pelt

    Los Alamos National Laboratory, Los Alamos, NM 87544, USA, Los Alamos National Laboratory, LANL, Los Alamos Natl Lab

  • Lin Yin

    Los Alamos Natl Lab

  • Brian J Albright

    Los Alamos Natl Lab, Los Alamos National Laboratory, Los Alamos, NM 87544, USA

  • Benjamin J Jones

    Los Alamos National Laboratory, LANL, Los Alamos Natl Lab