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Proceedings Paper

Cathode testing at the Air Force Research Laboratory
Author(s): Donald A. Shiffler; M. Lacour; K. Golby; Miguel D. Sena; Ryan J. Umstattd; John W. Luginsland; K. J. Hendricks; Thomas A. Spencer; Aimee N. Gibbs; M. Ruebush; D. Zagar
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Paper Abstract

An integral part of any vacuum rf device is the cathode. Many rf and microwave tubes utilize thermionic cathodes. However, these cathodes are generally limited to current densities less than 100 A/cm2, a limitation too great for the majority of High Power Microwave tubes. At the Air Force Research Laboratory, Directed Energy Directorate, we have to study a variety of explosive emission cathodes. This paper presents results on studies of several types of cathodes tested in a simple circular geometry. We also present results of research on different types of anode material. The data includes measurements of current, voltage, cathode lifetime, and cathode/anode out-gassing.15

Paper Details

Date Published: 14 July 2000
PDF: 10 pages
Proc. SPIE 4031, Intense Microwave Pulses VII, (14 July 2000); doi: 10.1117/12.391795
Show Author Affiliations
Donald A. Shiffler, Air Force Research Lab. (United States)
M. Lacour, Maxwell Labs., Inc. (United States)
K. Golby, Maxwell Labs., Inc. (United States)
Miguel D. Sena, Maxwell Labs., Inc. (United States)
Ryan J. Umstattd, Air Force Research Lab. (United States)
John W. Luginsland, Air Force Research Lab. (United States)
K. J. Hendricks, Air Force Research Lab. (United States)
Thomas A. Spencer, Air Force Research Lab. (United States)
Aimee N. Gibbs, Air Force Research Lab. (United States)
M. Ruebush, Sandia National Labs. (United States)
D. Zagar, Sandia National Labs. (United States)

Published in SPIE Proceedings Vol. 4031:
Intense Microwave Pulses VII
Howard E. Brandt, Editor(s)

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