Development of a 1-THz 4th-harmonic gyrotron

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Li, Fan-Hong and Du, Chao-Hai and Gao, Zi-Chao and Pan, Shi and Zhu, Juan-Feng and Zhang, Zi-Wen and Li, Si-Qi and Zhang, Liang and Cross, Adrian W.; (2020) Development of a 1-THz 4th-harmonic gyrotron. In: 2020 13th UK-Europe-China Workshop on Millimetre-Waves and Terahertz Technologies, UCMMT 2020. 2020 13th UK-Europe-China Workshop on Millimetre-Waves and Terahertz Technologies, UCMMT 2020 . Institute of Electrical and Electronics Engineers Inc., CHN. ISBN 9781728190648 (https://doi.org/10.1109/UCMMT49983.2020.9296084)

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Abstract

A design of a 1-THz 4th Harmonic Gyrotron is proposed in this paper. Fourth harmonic interaction is adopted to lower the strength of the external magnet. The magnet can be as low as 10T. Such a low-intensity magnetic field can be easily proposed by a superconduct magnet, which make the generation of continuous waves at 1 THz possible. Seeing that the mode competition is extremely fierce, a large orbit gun is employed as the driven source. An 80-kV, 0.7-A electron beam is injected into the interaction circuit to excite the fourth-harmonic electromagnetic waves. According to the cold dispersive diagram, the TE4, 8 mode of the cylindrical waveguide is selected as the operating mode to further suppress the mode competition induced by the fundamental modes, the 2nd harmonic modes and the 3rd harmonic modes. It could be inferred based on the multi-mode time-domain theory that an output power of 1.15 kW can be achieved. The scheme diagram for the hot test is proposed. The LOG is chosen as the electron gun. Particular structure is employed for improving the output efficiency in the interaction circuit.

ORCID iDs

Li, Fan-Hong, Du, Chao-Hai, Gao, Zi-Chao, Pan, Shi, Zhu, Juan-Feng, Zhang, Zi-Wen, Li, Si-Qi, Zhang, Liang ORCID logoORCID: https://orcid.org/0000-0002-6317-0395 and Cross, Adrian W. ORCID logoORCID: https://orcid.org/0000-0001-7672-1283;
  • Item type:Book Section
    ID code:76308
    Dates:
    Date
    Event
    30 December 2020
    Published
    1 September 2020
    Published Online
    20 July 2020
    Accepted
    Notes:© 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting /republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:04 May 2021 14:38
    Last modified:11 Nov 2024 15:24
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/76308
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