Enhanced hot-electron localization and heating in high-contrast ultraintense laser irradiation of microcone targets

  • J. Rassuchine
  • , E. D'Humières
  • , S. D. Baton
  • , P. Guillou
  • , M. Koenig
  • , M. Chahid
  • , F. Perez
  • , J. Fuchs
  • , P. Audebert
  • , R. Kodama
  • , M. Nakatsutsumi
  • , N. Ozaki
  • , D. Batani
  • , A. Morace
  • , R. Redaelli
  • , L. Gremillet
  • , C. Rousseaux
  • , F. Dorchies
  • , C. Fourment
  • , J. J. Santos
  • J. Adams, G. Korgan, S. Malekos, S. B. Hansen, R. Shepherd, K. Flippo, S. Gaillard, Y. Sentoku, T. E. Cowan

Research output: Contribution to journalArticlepeer-review

Abstract

We report experiments demonstrating enhanced coupling efficiencies of high-contrast laser irradiation to nanofabricated conical targets. Peak temperatures near 200 eV are observed with modest laser energy (10 J), revealing similar hot-electron localization and material heating to reduced mass targets (RMTs), despite having a significantly larger mass. Collisional particle-in-cell simulations attribute the enhancement to self-generated resistive (∼10 MG) magnetic fields forming within the curvature of the cone wall, which confine energetic electrons to heat a reduced volume at the tip. This represents a different electron confinement mechanism (magnetic, as opposed to electrostatic sheath confinement in RMTs) controllable by target shape.

Original languageEnglish
Article number036408
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume79
Issue number3
DOIs
Publication statusPublished - 3 Mar 2009

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