CNC machined helically corrugated interaction region for a THz gyrotron traveling wave amplifier

Donaldson, Craig R. and Zhang, Liang and Beardsley, Mat and Harris, Michael and Hugard, Peter G. and He, Wenlong (2018) CNC machined helically corrugated interaction region for a THz gyrotron traveling wave amplifier. IEEE Transactions on Terahertz Science & Technology, 8 (1). pp. 85-89. ISSN 2156-3446 (https://doi.org/10.1109/TTHZ.2017.2778944)

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Abstract

This paper reports the development of a helically corrugated interaction region (HCIR) for a 100 W gyrotron traveling wave amplifier operating at a central frequency of 0.37 THz. This HCIR has a corrugation amplitude of 42 μm, with a nominal waveguide diameter of 0.760 mm. The HCIR was made by electroforming copper on a sacrificial aluminum mandrel: the latter was precision CNC milled using a 0.2 mm diameter ball nose cutter. The dispersion characteristics of the HCIR were measured and found to be in good agreement with the analytical calculation and numerical simulation. Measured insertion loss was between 2 and 4 dB.

ORCID iDs

Donaldson, Craig R. ORCID logoORCID: https://orcid.org/0000-0001-6627-2461, Zhang, Liang ORCID logoORCID: https://orcid.org/0000-0002-6317-0395, Beardsley, Mat, Harris, Michael, Hugard, Peter G. and He, Wenlong ORCID logoORCID: https://orcid.org/0000-0001-7018-0527;
  • Item type:Article
    ID code:62658
    Dates:
    Date
    Event
    31 January 2018
    Published
    15 December 2017
    Published Online
    23 November 2017
    Accepted
    Notes:© 2017 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.
    Keywords:gyro-amplifier, helically corrugated waveguide, dispersion, Electrical engineering. Electronics Nuclear engineering, Electrical and Electronic Engineering
    Subjects:Technology > Electrical engineering. Electronics Nuclear engineering
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:19 Dec 2017 13:55
    Last modified:07 Dec 2021 01:41
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/62658
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