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

Additional Information:

©2021 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

Uncontrolled Keywords:

/dk/atira/pure/subjectarea/asjc/2500/2504

Subjects:

?? frequency conversionhybrid modesinstabilityklystron.klystronsmagnetic resonanceoscillatorssolid modelingtrajectoryvoltage measurementelectron deviceselectronics engineeringcomputer codeshigh power klystronhigh-efficiencylinear beamnonrelativisticparticle ??

Departments:

Faculty of Science and Technology > Engineering

ID Code:

157054

Deposited By:

ep_importer_pure

Deposited On:

12 Jul 2021 14:45

Refereed?:

Yes

Published?:

Published

Last Modified:

12 Feb 2024 00:40

URI:

https://eprints.lancs.ac.uk/id/eprint/157054