Hot Electron Generation in the Micro-Tipped Cone and Wedge Targets Irradiated with Ultra Intense Laser.

ORAL

Abstract

By comparing \textit{K$\alpha $} and bremsstrahlung x-rays yields, we have investigated hot electron generation from pyramidal-shaped reentrant micro-structured targets. We focused the THOR laser at the University of Texas at Austin (800nm, 40fs, 600mJ, 2 $\times $ 10$^{19}$ W/cm$^{2}$ ) into these cone and wedge shaped targets with various polarizations. We find that hot electron production is highest in the wedge targets when irradiated with transverse polarization, though \textit{K$\alpha $} is maximized with wedge targets and parallel polarization. These results are explained with particle-in-cell simulations.

Authors

  • B.I. Cho

    • Texas Center for High Intensity Laser Science, The University of Texas at Austin

  • G.M. Dyer

    • Texas Center for High Intensity Laser Science, The University of Texas at Austin

  • S. Kneip

    • Texas Center for High Intensity Laser Science, The University of Texas at Austin

  • D.R. Symes

    • Texas Center for High Intensity Laser Science, The University of Texas at Austin

  • A.C. Bernstein

    • Texas Center for High Intensity Laser Science, The University of Texas at Austin

  • S. Pikuz

    • Lomonosov Moscow State University, Russia

  • Y. Sentoku

    • Nevada Terawatt Facility, University of Nevada at Reno

  • N. Le Galloudec

    • Nevada Terawatt Facility, University of Nevada at Reno

  • T.E. Cowan

    • Nevada Terawatt Facility, University of Nevada at Reno

  • T. Ditmire

    • Texas Center for High Intensity Laser Science, The University of Texas at Austin