Investigation on the optimal magnetic field of a cusp electron gun for a W-band gyro-TWA

Zhang, Liang and He, Wenlong and Donaldson, Craig R. and Cross, Adrian W. (2018) Investigation on the optimal magnetic field of a cusp electron gun for a W-band gyro-TWA. Physics of Plasmas. pp. 1-6. ISSN 1070-664X

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    Abstract

    High efficiency and broadband operation of a gyrotron traveling wave amplifier (gyro-TWA) requires a high-quality electron beam with low-velocity spreads. The beam velocity spreads are mainly due to the differences of the electric and magnetic fields that the electrons withstand the electron gun. This paper investigates the possibility to decouple the design of electron gun geometry and the magnet system while still achieving optimal results, through a case study of designing a cusp electron gun for a W-band gyro-TWA. A global multiple-objective optimization routing was used to optimize the electron gun geometry for different predefined magnetic field profiles individually. Their results were compared and the properties of the required magnetic field profile are summarized.

    Author(s):Zhang, Liang ORCID logoORCID: https://orcid.org/0000-0002-6317-0395, He, Wenlong ORCID logoORCID: https://orcid.org/0000-0001-7018-0527, Donaldson, Craig R. ORCID logoORCID: https://orcid.org/0000-0001-6627-2461 and Cross, Adrian W. ORCID logoORCID: https://orcid.org/0000-0001-7672-1283
    Item type:Article
    ID code:63854
    Keywords:gyro-amplifier, cusp electron gun, magnetic field , Physics, Condensed Matter Physics
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:25 Apr 2018 11:02
    Last modified:27 Nov 2019 05:06
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/63854
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