X-ray image and x-ray burst features of under-dense plasma produced in high-density gas jets on the Leopard Laser at UNR

ORAL

Abstract

Results of Ar and Kr gas-puff experiments performed on the high-power Leopard laser at UNR are presented. The Leopard laser operated in two regimes: 350 fs, 40 TW pulse or 0.8 ns, 25 GW pulse with wavelength of 1.057 $\mu $m. A supersonic linear nozzle was compared with a cylindrical sub-sonic nozzle. Diagnostics included two sets of filtered Si-diodes, x-ray pinhole cameras, x-ray spectrometers, and PCDs. Specifically, x-ray images and structure of x-ray bursts are investigated and compared as a function of the linear or cylindrical gas jet, laser pulse duration, and target gas. Strong anisotropy with respect to laser beam polarization was observed in the x-ray output of the linear gas jet. Also, the addition of Kr to an Ar gas jet increased the intensity of the x-ray output compared to a pure Ar jet. The importance of analysis of x-ray burst features for better understanding the mechanisms of the laser energy to x-ray conversion efficiency and future research directions are discussed.

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Authors

  • K.A. Schultz

    University of Nevada, Reno, NV, University of Nevada, Reno, NV 89557 USA

  • V.L. Kantsyrev

    University of Nevada, Reno, NV 89557, USA, University of Nevada, Reno, NV, University of Nevada, Reno, NV 89557 USA

  • Alla Safronova

    University of Nevada, Reno, NV 89557, USA, University of Nevada, Reno, NV 89557 USA, University of Nevada, Reno

  • J.J. Moschella

    University of Nevada, Reno, NV 89557 USA

  • P. Wiewior

    University of Nevada, Reno, NV, University of Nevada, Reno, NV 89557 USA

  • V.V. Shlyaptseva

    California State University, Dominguez Hills, Univ of California - Irvine, University of Chicago, UC Merced, NINT, Dublin Institute of Technology, Ireland, MIT, NASA/GSFC, CRESST/UMBC \& NASA/GSFC, LLNL, MPI for Plasma Physics, Remeis-Sternwarte/ECAP/FAU, Humboldt State University, University of Nevada Reno, The University of Michigan, University of Nevada, Reno, Lawrence Livermore National Laboratory, Sandia National Laboratories, Los Alamos National Laboratory, Laboratory for Laser Energetics, University of Rochester, Univ of Nevada - Reno, University of Nevada, Reno - Physics Department, Jilin University, China, Department of Physics, University of California, Berkeley, Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Advanced Materials Laboratory, National Institute for Materials Science, Department of Physics \& Astronomy, California State University, Long Beach, CA 90840, UC Santa Barbara, Department of Physics and Astronomy, University of California, Riverside, University of California at Merced, Laboratoire de Physique des Plasmas (CNRS/Ecole Polytechnique/UPMC/Universit\'e Paris Sud), Ecole Polytechnique, 91128 Palaiseau, France, University of Nevada, Reno, NV 89557, USA, University of Nevada, Reno, NV 89557 USA, University of Nevada-Reno

  • M.E. Weller

    University of Nevada, Reno, NV 89557, USA, University of Nevada, Reno, NV, University of Nevada, Reno, NV 89557 USA

  • E.E. Petkov

    Univ of Nevada - Reno, University of Nevada, Reno, NV, University of Nevada, Reno, NV 89557 USA

  • I.K. Shrestha

    University of Nevada, Reno, NV 89557 USA

  • A. Stafford

    University of Nevada, Reno, NV 89557, USA, University of Nevada, Reno, NV, University of Nevada, Reno, NV 89557 USA

  • M.C. Cooper

    University of Nevada, Reno, NV, University of Nevada, Reno, NV 89557 USA