Target Surface Area Effects on Hot Electron Dynamics from High Intensity Laser-Plasma Interactions

Abstract

Reduced surface area targets were studied using an ultra-high intensity femtosecond laser in order to determine the effect of electron sheath field confinement on electron dynamics. X-ray emission due to energetic electrons was imaged using a Kalpha imaging crystal. Electrons were observed to travel along the surface of wire targets, and were slowed mainly by the induced fields. Targets with reduced surface areas were correlated with increased hot electron densities and proton energies. Hybrid VlasovFokkerPlanck simulations demonstrated increased electric sheath field strength in reduced surface area targets.

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Document Details

Document Type
Technical Report
Publication Date
Jun 15, 2016
Accession Number
AD1010692

Entities

People

  • A. G. Thomas
  • A. Mckelvey
  • A. Raymond
  • Anatoly Maksimchuk
  • C. Zulick
  • K. Krushelnick
  • Louise Willingale
  • V. Chvykov
  • V. Yanovsky

Organizations

  • University of Michigan

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Detectors
  • Direct Current
  • Electric Fields
  • Electromagnetic Fields
  • Electron Density
  • Electrons
  • Femtosecond Lasers
  • Geometry
  • Ions
  • Laser Pulses
  • Lasers
  • Magnetic Fields
  • Orientation (Direction)
  • Proton Beams
  • Simulations
  • Spatial Distribution
  • Spectra

Fields of Study

  • Physics

Readers

  • Pulsed Power and Plasma Physics.

Technology Areas

  • Directed Energy
  • Microelectronics