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

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Abstract

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).

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Authors and Affiliations

  1. Tech-X Corporation, Boulder, CO, 80303, USA

    Ming-Chieh Lin, Peter H. Stoltz & David N. Smithe

  2. Department of Electrical and Computer Engineering, University of Colorado, Colorado Springs, CO, 80918, USA

    Hoyoung Song

  3. Department of Electronics Convergence Engineering, Kwangwoon University, Seoul, 139-701, Korea

    Hyoung Jong Kim & Jin Joo Choi

  4. Agency for Defense Development, Daejon, 305-152, Korea

    Seon Joo Kim & Sung Hoon Jang

Authors
  1. Ming-Chieh Lin
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  2. Peter H. Stoltz
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  3. David N. Smithe
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  4. Hoyoung Song
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  5. Hyoung Jong Kim
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  6. Jin Joo Choi
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  7. Seon Joo Kim
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  8. Sung Hoon Jang
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Correspondence to Hoyoung Song.

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Lin, MC., Stoltz, P.H., Smithe, D.N. et al. Design and modeling of multistage depressed collectors by using 3D conformal finite-difference time-domain particle-in-cell simulations. Journal of the Korean Physical Society 60, 731–738 (2012). https://doi.org/10.3938/jkps.60.731

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  • DOI: https://doi.org/10.3938/jkps.60.731

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