FLEXI ELECTRODE ELECTRON GUN FOR LONG LIFE TRAVELLING-WAVE TUBES

FLEXI ELECTRODE ELECTRON GUN FOR LONG LIFE TRAVELLING-WAVE TUBES

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 electro...

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Veröffentlicht in:Progress in electromagnetics research. Letters 2020-01, Vol.91, p.117-122
Hauptverfasser: Shankar, Abhay, Nagaraju, Atmakuru, Choudhury, Amitavo R, Ghosh, Sanjay K
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Sprache:eng
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Design and construction
Electron gun
Equipment and supplies
Traveling-wave tubes
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container_end_page 122
container_issue
container_start_page 117
container_title Progress in electromagnetics research. Letters
container_volume 91
creator Shankar, Abhay
Nagaraju, Atmakuru
Choudhury, Amitavo R
Ghosh, Sanjay K
description 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.
doi_str_mv 10.2528/PIERL20010603
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source EZB-FREE-00999 freely available EZB journals
subjects Design and construction
Electron gun
Equipment and supplies
Traveling-wave tubes
title FLEXI ELECTRODE ELECTRON GUN FOR LONG LIFE TRAVELLING-WAVE TUBES
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