Numerical Analysis of Resonant Multipolar Instabilities in High Power Klystrons

Cai, J. and Syratchev, I. and Burt, G. (2021) Numerical Analysis of Resonant Multipolar Instabilities in High Power Klystrons. IEEE Transactions on Electron Devices, 68 (7). pp. 3617-3621. ISSN 0018-9383

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Abstract

The monopole monotron instability is a well-known phenomenon in linear beam devices. In recent development of a high-efficiency 50-MW X-band klystron, such instabilities were found and mitigated in a special second-harmonic multicell cavities triplet that is used to improve the klystron's performance. In further simulations of the klystron, using 3-D particle-in-cell computer codes, the more rare and complicated phenomenon, previously unreported in nonrelativistic devices, associated with rotating multipolar monotron instabilities was discovered. In this article, the qualitative and quantitative analysis of these oscillations is presented. Various resonant multipolar instabilities suppression strategies are introduced and discussed in detail.

Item Type:
Journal Article
Journal or Publication Title:
IEEE Transactions on Electron Devices
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Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200/2208
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ID Code:
157054
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Deposited On:
12 Jul 2021 14:45
Refereed?:
Yes
Published?:
Published
Last Modified:
21 Oct 2021 05:14