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Choi, EunMi
THz Vacuum Electronics and Electrodynamics
Research Interests
  • High power millimeter-wave/THz wave, vacuum electronics, plasma breakdown, electron beams, electromagnetics, microwave/RF engineering

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Accurate Gyrotron Performance Prediction Based on Full 3-D Magnetic Field and Electron Beam Information Altered by Nonideal Factors

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Title
Accurate Gyrotron Performance Prediction Based on Full 3-D Magnetic Field and Electron Beam Information Altered by Nonideal Factors
Author
Lee, IngeunSawant, AshwiniShin, JinwooChoi, EunMi
Issue Date
2021-03
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Citation
IEEE TRANSACTIONS ON ELECTRON DEVICES, v.68, no.3, pp.1276 - 1283
Abstract
We improved the accuracy of gyrotron performance analysis using particle-in-cell (PIC) code. To accurately predict the performance of a device under development, an electron beam (e-beam) that has information that best represents realistic e-beam information should be used for a cavity simulation, and an investigation of factors that affect the e-beam information is necessary at the design stage. Thus, we conducted an intensive analysis of the association between the e-beam information changed by nonideal factors and the performance variation of the gyrotron cavity. The altered e-beam information was obtained using a fully 3-D commercial code (Computer Simulation Technology (CST) Studios), with consideration of manufacturing imperfections and misalignment. The acquired e-beam information was then directly imported and used for gyrotron cavity simulations with the CST PIC code. This allowed us to investigate the gyrotron performance degradation caused by the nonideal e-beam information. Additionally, we validated the CST results using our in-house gyrotron code (UNIST Gyrotron Design Tool, UGDT). Finally, the simulation results were compared with previously published experimental data.
URI
https://scholarworks.unist.ac.kr/handle/201301/50029
URL
https://ieeexplore.ieee.org/document/9344854
DOI
10.1109/TED.2021.3053512
ISSN
0018-9383
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