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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2020-05-29
Flexi Electrode Electron Gun for Long Life Travelling-Wave Tubes
By
Abhay Shankar,

    Dr. Abhay Shankar

    Microwave Device

    Central Electronics Engineering Research Institute

    India

    Homepage

Atmakuru Nagaraju,

    Mr. Atmakuru Nagaraju

    Microwave Device

    Central Electronics Engineering Research Institute

    India

    Homepage

Amitavo Roy Choudhury,

    Dr. Amitavo Roy Choudhury

    CSIR-Central Electronics Engineering Research Institute (CEERI)

    India

    Homepage

Sanjay Kumar Ghosh

    Dr. Sanjay Kumar Ghosh

    Bharat Electronics

    India

    Homepage

Progress In Electromagnetics Research Letters, Vol. 91, 117-122, 2020
doi:10.2528/PIERL20010603 | Google Scholar

Abstract
A flexi electron gun consists of multiple electrodes and can be used to maintain uniform beam current over the life of a traveling-wave tube (TWT). The flexi electron gun consists of dispenser cathode, anode1, anode2 and anode3 in addition to a beam focusing electrode (BFE). In an optimized electron gun, anode1 potential plays an important role in increasing beam current within the same biased condition of electronic power conditioner (EPC) and can be used as a critical parameter to increase current with time when cathode performance (beam current) degrades with time. Geometry, position and bias of these electrodes with respect to cathode provide low perveance electron beam optics to the interaction structure of a TWT. The flexi gun has been modelled in EGUN, developed and integrated with TWT, and simulated results are compared with experiment. This paper presents a detailed investigation of the effect of anode1 on beam current and also presents the cause of large variation of simulated and measured beam currents through back simulation in EGUN.
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Citation
Abhay Shankar, Atmakuru Nagaraju, Amitavo Roy Choudhury, and Sanjay Kumar Ghosh, "Flexi Electrode Electron Gun for Long Life Travelling-Wave Tubes," Progress In Electromagnetics Research Letters, Vol. 91, 117-122, 2020.
doi:10.2528/PIERL20010603
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