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Investigation of Fully Three-Dimensional Helical RF Field Effects on TWT Beam/Circuit InteractionA fully three-dimensional (3D), time-dependent, helical traveling wave-tube (TWT) interaction model has been developed using the electromagnetic particle-in-cell (PIC) code MAFIA. The model includes a short section of helical slow-wave circuit with excitation fed by RF input/output couplers, and electron beam contained by periodic permanent magnet (PPM) focusing. All components of the model are simulated in three dimensions allowing the effects of the fully 3D helical fields on RF circuit/beam interaction to be investigated for the first time. The development of the interaction model is presented, and predicted TWT performance using 2.5D and 3D models is compared to investigate the effect of conventional approximations used in TWT analyses.
Document ID
20010059038
Acquisition Source
Glenn Research Center
Document Type
Preprint (Draft being sent to journal)
Authors
Kory, Carol L.
(Analex Corp. Cleveland, OH United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2000
Subject Category
Electronics And Electrical Engineering
Funding Number(s)
PROJECT: RTOP 632-6E-51
CONTRACT_GRANT: NAS3-27600
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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