Emission Studies on Reservoir Cathodes

Abstract

The authors report improved emission from their miniature reservoir cathodes due to changes in emission material composition and processes. Also, the diffuser plug porosity and composition were adjusted. The activity curves on diode testers now exhibit knee temperatures of 970 degrees CB at 5 A/sq cm. This is slightly above the "M" impregnated cathodes used as controls. Activation time also was reduced. The main improvement was the introduction of sub-micron tungsten as an activator in the reservoir and improved processes to protect emission material from water vapor. This paper presents the data and describes the compositional and process changes that were made.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 2008
Accession Number
ADA492753

Entities

People

  • Bernard Vancil
  • Ivor Brodie
  • J. L. Shaw
  • Tyrus Monson
  • Victor Schmidt
  • Wayne L. Ohlinger

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Abstracts
  • Barium
  • Barium Compounds
  • Barium Oxides
  • Diffusers
  • Emission
  • Films
  • High Temperature
  • Information Operations
  • Materials
  • Military Research
  • Oxides
  • Particle Size
  • Reservoirs
  • Thin Films
  • Tungsten
  • Vacuum Electronics

Readers

  • Combustion and Flow Dynamics.
  • Pulsed Power and Plasma Physics.
  • Rocket Propulsion.