Accession Number : ADA190473

Title :   Program to Research Laser-Driven Thermionic Electron Sources for Free Electron Lasers.

Descriptive Note : Final rept.

Corporate Author : THERMO ELECTRON CORP WALTHAM MASS

PDF Url : ADA190473

Report Date : Jan 1988

Pagination or Media Count : 38

Abstract : This is the Final Report on the research and development of high brightness pulse laser driven thermionic electron sources. Enhanced coupling of electron beam energies to radiative fields in accelerator-driven free-electron lasers requires injector cathodes of higher brightness than is possible with conventional dispenser cathodes or plasma-forming field emitters. Cesiated refractory surfaces and dispenser cathodes which are pulse laser heated may offer such an increase in brightness, by the emission of monoenergetic beams of electrons at high current densities. The studies were designed to investigate the emission characteristics of both of these types of thermionic cathodes.

Descriptors :   *CATHODES(ELECTRON TUBES), *ELECTRON BEAMS, *FREE ELECTRON LASERS, *THERMIONIC EMISSION, BRIGHTNESS, CATHODES, ELECTRON EMISSION, ELECTRON ENERGY, ELECTRONS, EMISSION, HIGH DENSITY, HIGH POWER, INJECTORS, PULSED LASERS, RADIATION

Subject Categories : Lasers and Masers
      Electrical and Electronic Equipment
      Particle Accelerators

Distribution Statement : APPROVED FOR PUBLIC RELEASE