Emittance Measurements on Field Emitter Diodes

Abstract

On the basis of time-integrated emittance measurements, several different types of field emitter diodes were investigated at 1-3 kA, 1 MeV. The experimental parameters were the cathode type, the anode mesh texture, the diode spacing and voltage, and the level of collimation of the emerging beam. Over a wide range, the emittance was found to be proportional to the level of collimation. With the diode spacing left fixed, the emittance was found to be essentially independent of the diode voltage and current. The lowest emittances (30-40 mr-cm at 400 A) were obtained with a foil-type cathode in a ball-over-plane configuration.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1979
Accession Number
ADA636540

Entities

People

  • Bernhard Kulke
  • Ronald Kihara

Organizations

  • University of California, Berkeley

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Contractors
  • Diameters
  • Electric Fields
  • Electron Beams
  • Electrons
  • Electrostatic Fields
  • Elements
  • Emittance
  • Geometry
  • Governments
  • Measurement
  • Pulse Transformers
  • Scintillation Counters
  • Solenoids
  • United States
  • X Rays

Fields of Study

  • Physics

Readers

  • Computer Vision.
  • Pulsed Power and Plasma Physics.
  • Spectroscopy.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster