Design and modeling of multistage depressed collectors by using 3D conformal finite-difference time-domain particle-in-cell simulations

The feasibility of designing and modeling a multistage depressed collector (MDC) by using 3D conformal finite-difference time-domain (CFDTD) particle-in-cell (PIC) simulations as implemented in 3D PIC code, VORPAL has been studied. A simple circuit model employing feedback mechanisms has been implem...

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Bibliographic Details
Published in:Journal of the Korean Physical Society 2012, 60(5), , pp.731-738
Main Authors: Lin, Ming-Chieh, Stoltz, Peter H., Smithe, David N., Song, Hoyoung, Kim, Hyoung Jong, Choi, Jin Joo, Kim, Seon Joo, Jang, Sung Hoon
Format: Article
Language:English
Subjects:
Mathematical and Computational Physics
Particle and Nuclear Physics
Physics
Physics and Astronomy
Theoretical
물리학
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Summary:The feasibility of designing and modeling a multistage depressed collector (MDC) by using 3D conformal finite-difference time-domain (CFDTD) particle-in-cell (PIC) simulations as implemented in 3D PIC code, VORPAL has been studied. A simple circuit model employing feedback mechanisms has been implemented to provide stable time-dependent voltages for each stage of the depressed collector, and an arbitrary space-time dependent spent-beam distribution is given in our timedomain simulations. We demonstrate the design of a five-stage depressed collector recovering a triangular-like spent-beam distribution imported from a large signal simulation, achieving an energy recovery efficiency of 75%. The MDC after optimization can be integrated into the limited space of an S-band traveling wave tube for a compact microwave power module (MPM).
ISSN:0374-4884
1976-8524
DOI:10.3938/jkps.60.731