Electron Flows Formed by Electron-Optical Systems Using Composite Field Emitters Made of Thermally Expanded Graphite and Diamond-Graphite Mixtures

Electron Flows Formed by Electron-Optical Systems Using Composite Field Emitters Made of Thermally Expanded Graphite and Diamond-Graphite Mixtures

Composite cathodes prepared according to an original technique from thermally expanded graphite (TEG) as well as from a mixture of diamond granules with particles of TEG (diamond-graphite cathodes) were studied. Regularities in the formation of electron beams by electron-optical systems (EOSs) with...

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Veröffentlicht in:IEEE transactions on electron devices 2023-10, Vol.70 (10), p.1-5
Hauptverfasser: Gordeev, S., Sezonov, V., Sominskii, G., Taradaev, E., Taradaev, S.
Format: Artikel
Sprache:eng
Schlagworte:
Cathodes
Composite cathodes
diamond granules
Diamonds
Earth Observing System
Electron beams
electron flows
electron-optical systems (EOSs)
Emission analysis
Emitters
Graphite
Mixtures
subterahertz microwave devices
Surface treatment
thermally expanded graphite (TEG)
Voltage control
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Zusammenfassung:Composite cathodes prepared according to an original technique from thermally expanded graphite (TEG) as well as from a mixture of diamond granules with particles of TEG (diamond-graphite cathodes) were studied. Regularities in the formation of electron beams by electron-optical systems (EOSs) with such cathodes were studied. The tested composite cathodes make it possible to obtain emission currents up to approximately 70-80 mA from an emitting surface area of 0.04-0.05 cm ^\text{2} , sufficient to ensure the operation of some types of subterahertz microwave devices, including spectroscopic gyrotrons.
ISSN:0018-9383
1557-9646
DOI:10.1109/TED.2023.3305344