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Title: Output System of A 220-/247.5-/275-GHz, 1.0-MW, Triple-Frequency Regime Gyrotron
Authors: Baghel G.S.
Kartikeyan M.V.
Published in: IEEE Transactions on Electron Devices
Abstract: In this paper, the design studies of an output system [comprising a nonlinear taper, a quasi-optical launcher (QOL), and an RF window] for 220-/247.5-/275-GHz, triple-frequency gyrotron are presented. The precisely chosen mode-triplet is TE39,14/TE43,16/TE47,18 to support adequate power transfer at their corresponding frequencies of operation. The nonlinear uptaper is optimized using our in-house code Gyrotron Design Suite version 4.0 (GDSv4.0 2016) [7] in order to reduce the mode conversion for all the frequencies. A common dimpled wall QOL is designed and simulated using commercially available launcher optimization tool. A chemical vapor-deposited-diamond RF window is recommended with a decent transmission bandwidth for all the operating frequencies. The knowledge of correct phase of the Gaussian-like beam coming out of the RF window of any high-power gyrotron is most important for scheming a correct matching optic unit. Hence, the theoretical phase of the beams at a window plane is retrieved using an iterative phase retrieval algorithm. © 2012 IEEE.
Citation: IEEE Transactions on Electron Devices (2018), 65(4): 1558-1563
Issue Date: 2018
Publisher: Institute of Electrical and Electronics Engineers Inc.
Keywords: Dimpled wall quasi-optical launcher (QOL)
iterative phase retrieval algorithm (IPRA)
nonlinear taper (NLT)
triple-frequency gyrotron
ISSN: 189383
Author Scopus IDs: 55270387900
Author Affiliations: Baghel, G.S., Department of Electronics and Communication Engineering, IIT Roorkee, Roorkee, 247667, India
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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