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Proceedings Paper

RF extraction issues in the relativistic klystron amplifiers
Author(s): Victor Serlin; Moshe Friedman; Martin Lampe; Richard F. Hubbard
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Paper Abstract

Relativistic klystron amplifiers (RKAs) were successfully operated at NRL in several frequency regimes and power levels. In particular, an L-band RKA was optimized for high- power rf extraction into the atmosphere and an S-band RKA was operated, both in a two-beam and a single-beam configuration. At L-band the rf extraction at maximum power levels (>= 15 GW) was hindered by pulse shortening and poor repeatability. Preliminary investigation showed electron emission in the radiating horn, due to very high voltages associated with the multi-gigawatt rf power levels. This electron current constituted an electric load in parallel with the radiating antenna, and precipitated the rf pulse collapse. At S-band the peak extracted power reached 1.7 GW with power efficiency approximately 50%. However, pulse shortening limited the duration to approximately 50 nanoseconds. The new triaxial RKA promises to solve many of the existing problems.

Paper Details

Date Published: 13 May 1994
PDF: 8 pages
Proc. SPIE 2154, Intense Microwave Pulses II, (13 May 1994); doi: 10.1117/12.175743
Show Author Affiliations
Victor Serlin, Naval Research Lab. (United States)
Moshe Friedman, Naval Research Lab. (United States)
Martin Lampe, Naval Research Lab. (United States)
Richard F. Hubbard, Naval Research Lab. (United States)

Published in SPIE Proceedings Vol. 2154:
Intense Microwave Pulses II
Howard E. Brandt, Editor(s)

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