Design and Modeling of Multistage Depressed Collectors by Using 3D Conformal Finite-difference Time-domain Particle-in-cell Simulations

作     者：Lin, Ming-Chieh Stoltz, Peter H. Smithe, David N. Song, Hoyoung Kim, Hyoung Jong Choi, Jin Joo Kim, Seon Joo Jang, Sung Hoon 

作者机构：Tech X Corp Boulder CO 80303 USA Univ Colorado Dept Elect & Comp Engn Colorado Springs CO 80918 USA Kwangwoon Univ Dept Elect Convergence Engn Seoul 139701 South Korea Agcy Def Dev Taejon 305152 South Korea 

出 版 物：《JOURNAL OF THE KOREAN PHYSICAL SOCIETY》 (韩国物理学会志)

年 卷 期：2012年第60卷第5期

页      面：731-738页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：Defense Acquisition Program Administration Agency for Defense Development 

主　　题：Multistage depressed collector Conformal finite-difference time-domain Particle-in-cell Feedback algorithms 

摘      要：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 time-domain 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).