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Title: Electron Gun and Output Coupling System for a 220-/251.5-GHz, 2-MW Triangular Corrugated Coaxial Cavity Gyrotron
Authors: Yuvaraj S.
Illy S.
Kartikeyan M.V.
Published in: IEEE Transactions on Electron Devices
Abstract: In this paper, design studies of a common electron gun and output coupling system for the dual regime operation of a 2-MW coaxial cavity gyrotron are presented. The operating frequencies (220/251.5 GHz) are selected, such that the proposed gyrotron can be used for plasma heating applications in the future experimental fusion reactors. A coaxial magnetron injection gun (MIG) is designed for the generation of hollow electron beam with the desired parameters. Initial geometry of the electron gun is determined through our in-house code Gyrotron Design Suite version 4.1 2016 (GDSv4.1 2016). The MIG is further optimized and simulated through the beam trajectory code ESRAY. A nonlinear taper (NLT) is designed with maximum transmission efficiency at both the operating frequencies. A quasi-optical launcher (QOL) is designed and numerically optimized through the commercial software, launcher optimization tool. The designed launcher efficiently converts both the operating modes into Gaussian-like mode. A single-disk RF window is designed for the extraction of high-power output beam from the gyrotron at their respective operating frequencies. The design of the NLT and the RF window are carried out through GDSv4.1 2016. © 1963-2012 IEEE.
Citation: IEEE Transactions on Electron Devices (2017), 64(12): 5134-5140
Issue Date: 2017
Publisher: Institute of Electrical and Electronics Engineers Inc.
Keywords: Coaxial magnetron injection gun (MIG)
dual regime coaxial cavity gyrotron
nonlinear taper (NLT)
quasi-optical launcher (QOL)
RF window
ISSN: 189383
Author Scopus IDs: 57190343042
Author Affiliations: Yuvaraj, S., Department of Electronics and Communication Engineering, IIT Roorkee, Roorkee, 247667, India
Illy, S., Institut fuer Hochleistungsimpuls und Mikrowellentechnik, Karlsruhe Institute of Technology, North Campus, Eggenstein-Leopoldshafen, D-76344, Germany
Kartikeyan, M.V., Department of Electronics and Communication Engineering, IIT Roorkee, Roorkee, 247667, India
Corresponding Author: Kartikeyan, M.V.; Department of Electronics and Communication Engineering, IIT RoorkeeIndia; email:
Appears in Collections:Journal Publications [ECE]

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