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Proceedings Paper

Inductively loaded wide-gap designs for relativistic klystrons
Author(s): Martin Lampe; Richard F. Hubbard; Moshe Friedman; Victor Serlin; S. P. Slinker; R. F. Fernsler; Denis G. Colombant
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Paper Abstract

As the power and the frequency of a relativistic klystron increase, design of both modulation and extraction cavities becomes increasingly difficult. If the gap is narrow, the rf electric field begins to exceed limits for electron emission or breakdown. On the other hand, if the gap width exceeds a small fraction of a wavelength, typical extraction modes do not couple well, and space charge potential energy reduces efficiency and limits the current that can cross the gap. We present theoretical investigations of a novel gap design that incorporates an inductively loaded return-current structure. This structure serves to neutralize the dc space charge of the beam, while sustaining the longitudinal rf field that extracts the microwave energy. With appropriate choice of resonant modes, it appears that gap widths exceeding a half wavelength can be used for modulation of high-current beams, as well as extraction of rf energy with high efficiency.

Paper Details

Date Published: 13 May 1994
PDF: 12 pages
Proc. SPIE 2154, Intense Microwave Pulses II, (13 May 1994); doi: 10.1117/12.175773
Show Author Affiliations
Martin Lampe, Naval Research Lab. (United States)
Richard F. Hubbard, Naval Research Lab. (United States)
Moshe Friedman, Naval Research Lab. (United States)
Victor Serlin, Naval Research Lab. (United States)
S. P. Slinker, Naval Research Lab. (United States)
R. F. Fernsler, Naval Research Lab. (United States)
Denis G. Colombant, Naval Research Lab. (United States)

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

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