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Measurements of Heat Flux-Driven Anisotropic Electron Temperatures in Laser-Produced Plasmas

ORAL

Abstract

Experiments at the Omega Laser Facility have utilized a single-beam gas-jet platform to infer anisotropic electron temperatures (T∥ > T⊥) in a low-density Nitrogen plasma (ne = 5×1018 cm-3). The temperature anisotropy exists on a nanosecond timescale while being driven by a 351 nm laser focused through a 200 μm distributed phase plate (I = 5×1014 W/cm2). Thomson-scattering analysis show the spectral density function changes relative to the axis of the laser beam. The temperature anisotropy is generated by the perpendicular heat conduction associated with the temperature gradient in that direction. Results from recent experiments using a larger 650 μm DPP to effectively remove the temperature gradient will be discussed.

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Presenters

  • Zachariah E Barfield

    Laboratory for Laser Energetics, University of Rochester

Authors

  • Zachariah E Barfield

    Laboratory for Laser Energetics, University of Rochester

  • Jonathan L Peebles

    Laboratory for Laser Energetics

  • Dino Mastrosimone

    LLE, Laboratory for Laser Energetics

  • Joseph D Katz

    Laboratory for Laser Energetics, University of Rochester - Laboratory for Laser Energetics, University of Rochester

  • Nathaniel R Shaffer

    Lab for Laser Energetics

  • John P Palastro

    University of Rochester, University of Rochester, Laboratory for Laser Energetics

  • Dustin H Froula

    University of Rochester, University of Rochester, Laboratory for Laser Energetics