Proton Radiography of Field Distributions in Ultra-Intense-Laser Plasma Interactions with Pulse of MeV Proton Beams

POSTER

Abstract

Proton radiography has been used to observe transient electric and magnetic fields in laser plasma interactions. We report an experimental investigation of a transient electric field generated around a laser-irradiated-plasma-fiber attached on a tip of a cone-geometry target. The electric field guided and collimated energetic electrons generated by the laser-plasma interactions in the fiber. The front of these fields propagated along the fiber with the energetic electrons at almost the light velocity. Simulation with the Geant4 Monte Carlo code shows the electric field above a few TV/m were excited around the fiber.

*This research was partially supported by a grant for Osaka Univ. GCOE Program from the MEXT, Japan.

Authors

  • Hirotaka Nakamura

    • ILE, Osaka Univ., Japan

  • Ryosuke Kodama

    • Grad. school of Eng., Osaka Univ., and CREST, JST, Japan

  • Motonobu Tampo

    • Kansai Photon Science Institute, JAEA, Japan

  • Marco Borghesi

    • School of Math. and Phy., The Queen`s Univ. of Belfast, UK

  • Lorenzo Romagnani

    • School of Math. and Phy., The Queen`s Univ. of Belfast, UK

  • Julien Fuchs

    • LULI, Ecole Polytechnique, France

  • Munib Amin

    • Heinrich Heine Univ., Germany

  • Ariane Pipahl

    • Heinrich Heine Univ., Germany

  • Oswald Willi

    • Heinrich Heine Univ., Germany

  • Takuya Michibata

    • Grad. school of Eng., Osaka Univ., Japan

  • Kunioki Mima

    • ILE, Osaka Univ., Japan

  • Hiroshi Azechi

    • ILE, Osaka Univ., Japan