Inductively-loaded wide-gap designs for relativistic klystrons
Book
·
OSTI ID:51841
- Naval Research Lab., Washington, DC (United States). Plasma Physics Division
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. The authors present theoretical investigations of a novel gap design which 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 which 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.
- OSTI ID:
- 51841
- Report Number(s):
- CONF-940142--; ISBN 0-8194-1449-2
- Country of Publication:
- United States
- Language:
- English
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