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Measurement and unfolding of MeV x-ray spectra from high-intensity laser-solid interactions

POSTER

Abstract

During the interaction between a high-intensity laser (∼ 1021 W/cm2) and a mm-thick solid target, a population of hot electrons is generated which travel through the target and create MeV photons via bremsstrahlung radiation. Such high-energy photons are useful in imaging applications, so it is important to optimize the energy and yield of this process. At an experiment performed at the Texas Petawatt laser, the target type (bare, plastic coating, nanowires), laser energy (50 J – 140 J), and pulse duration (120 fs – 600 fs) were varied to study the effects on the produced X-ray spectra. These spectra were measured with an assortment of diagnostics measuring radiation from the front and back sides of the target surface. An advantage of several of these diagnostics is that they can function at a high repetition rate, which allows them to monitor the X-ray spectra across thousands of shots during high repetition rate applications. Here we report on the unfolded spectra from two of these diagnostics: a scintillating attenuation spectrometer and a scintillating screen with a filter array.

Presenters

  • Rebecca J Fitzgarrald

    University of Michigan

Authors

  • Rebecca J Fitzgarrald

    University of Michigan

  • Farhat Beg

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

  • Alemayehu Bogale

    University of California, San Diego

  • sandra a bruce

    University of Texas, the Unviersity of Texas at Austin, university of texas at austin

  • Brandon Cage

    Rice University, rice university

  • Hui A Chen

    Lawrence Livermore National Laboratory, LLNL

  • Enam A Chowdhury

    Ohio State Univ - Columbus

  • Timothy Coffman

    Los Alamos National Lab, Los Alamos National Laboratory

  • Joshua E Coleman

    Los Alamos Natl Lab

  • Thomas H Day

    Los Alamos National Lab, Los Alamos National Laboratory

  • Todd Ditmire

    University of Texas at Austin

  • elliot fang

    Rice University, rice university and university of maryland

  • juan c fernandez

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

  • 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

  • Todd Hao

    Rice University

  • Reed C Hollinger

    Colorado State University

  • James Hunter

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

  • Benjamin J Jones

    Los Alamos National Laboratory, LANL, Los Alamos Natl Lab

  • Yongho Kim

    Los Alamos National Laboratory

  • Marc Klasky

    Los Alamos National Laboratory, LANL

  • Edison P Liang

    Rice University

  • Scott V Luedtke

    Los Alamos National Laboratory

  • Kevin D Meaney

    LANL, Los Alamos National Laboratory

  • Albert J Mendez

    Los Alamos National Laboratory

  • La Moyne T Mix

    Los Alamos National Laboratory

  • Ryan Nedbailo

    Colorado State University, University of Texas

  • Sasi Palaniyappan

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

  • Hernan J Quevedo

    University of Texas at Austin

  • Jorge J Rocca

    Colorado State University, XUV lasers and Colorado State University

  • Dean R Rusby

    Lawrence Livermore National Lab, Lawrence Livermore National Laboratory

  • John L Schmidt IV

    Los Alamos National Laboratory

  • Mark J Schmitt

    LANL

  • 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

  • michael spinks

    University of Texas, the University of Texas at Austin, university of texas at austin

  • David Stark

    Los Alamos National Laboratory

  • Joseph Strehlow

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

  • Alexander G Thomas

    University of Michigan

  • 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

  • Chun-Shang Wong

    Los Alamos National Laboratory

  • Lin Yin

    Los Alamos Natl Lab

  • Brian J Albright

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