NDLI: Particle-in-Cell Simulation of a Spatial-Harmonic Magnetron With a Cold Secondary Emission Cathode

Content Provider	IEEE Xplore Digital Library
Author	Esfahani, N.N. Schunemann, K.
Copyright Year	1973
Abstract	A 16-vane millimeter-wave spatial-harmonic magnetron (SHM) with a cold secondary emission cathode is examined by the use of a 3-D particle-in-cell (PIC) code embedded in CST Particle Studio. Simulations of the SHM are performed without artificial RF priming and without assuming restrictive assumptions on the mode of operation or on the number of harmonics to be considered. Thus, in our simulations, the electromagnetic oscillations grow naturally from noise. Time-evolved space-charge simulations and gradual formation of a single-frequency RF oscillation are presented. Examination of space-charge profiles at saturation time reveals the presence of two different space-charge distributions that depend on the amount of primary emission current. This current is employed to model a bombarding current, which is used to initialize the cold cathode. It is shown that a small primary emission density results in nonperiodic distribution of space charge at saturation time, which is in accordance with the previously reported space-charge distribution in SHMs. The simulated current, power, and efficiency indicate good correlation with the experimental results.
Sponsorship	IEEE Nuclear and Plasma Sciences Society
Starting Page	3512
Ending Page	3519
Page Count	8
File Size	1095868
File Format	PDF
ISSN	00933813
Volume Number	40
Issue Number	12
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-12-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Cathodes Simulation Resonant frequency Mathematical model Harmonic analysis Magnetrons spatial-harmonic magnetron (SHM) Nonlinear beam-wave interaction particle-in-cell (PIC) simulation secondary emission
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Condensed Matter Physics

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