Simple Laser-Driven, Metal Photocathodes as Cold, High Current Electron Sources.

Abstract

Recent developments in excimer laser design have made near ultraviolet light intensities of several megawatts per square centimeter possible in unfocused beams. These advances and recent experiments indicate that high-current, simple-metal photoemissive electron guns are now feasible. Such guns should produce greater then 50 Amps per square centimeter of illuminated cathode surface. Additionally, these guns could operate at vacuums of .000001 torr with no complicated system components inside the vacuum enclosure. The electron beam produced by such photoemission guns would have a very low emittance and high brightness. This beam would also follow closely the temporal characteristics of the laser pulse, making fast risetime, ultra-short electron beam pulses possible. Keywords: Electron Guns; Photoemissive Electron Sources; Krypton Fluoride Laser Photoemission.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1986
Accession Number
ADA175696

Entities

People

  • Jimmy D. Saunders

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Charged Particles
  • Data Acquisition
  • Electron Beams
  • Electron Emission
  • Electron Energy
  • Electron Guns
  • Electronic Equipment
  • Electrons
  • Emission
  • Excimer Lasers
  • Krypton Fluoride Lasers
  • Laser Pulses
  • Lasers
  • Light Sources
  • Quantum Yields
  • Surface Properties
  • Surface Roughness

Fields of Study

  • Physics

Readers

  • Pulsed Power and Plasma Physics.

Technology Areas

  • Directed Energy
  • Microelectronics