Physical operating principles of scandate cathodes for microwave devices
- Authors: Kapustin V.I.1, Li I.P.1, Shumanov A.V.1, Lebedinskii Y.Y.2, Zablotskii A.V.2
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Affiliations:
- OAO Pluton
- Moscow Institute of Physics and Technology (State University)
- Issue: Vol 62, No 1 (2017)
- Pages: 116-126
- Section: Physical Electronics
- URL: https://journals.rcsi.science/1063-7842/article/view/198801
- DOI: https://doi.org/10.1134/S1063784217010108
- ID: 198801
Cite item
Abstract
The electronic structure of barium oxide crystallites determining the emission properties of both dispenser and scandate cathodes has been studied using electron spectroscopy for chemical analysis, electron energy loss spectroscopy, and optical spectroscopy. It has been established that the other elements (calcium, aluminum, scandium, and tungsten) contained in cathode materials are diluted in barium oxide and significantly affect its electronic structure and, consequently, emission properties. The obtained results give an idea about the physical and physicochemical mechanisms of the effect of scandium on the reduction of the work function of scandate cathodes relative to that of the cathodes of other types.
About the authors
V. I. Kapustin
OAO Pluton
Author for correspondence.
Email: kapustin@mirea.ru
Russian Federation, Moscow, 105120
I. P. Li
OAO Pluton
Email: kapustin@mirea.ru
Russian Federation, Moscow, 105120
A. V. Shumanov
OAO Pluton
Email: kapustin@mirea.ru
Russian Federation, Moscow, 105120
Yu. Yu. Lebedinskii
Moscow Institute of Physics and Technology (State University)
Email: kapustin@mirea.ru
Russian Federation, Moscow oblast, Dolgoprudnyi, 141700
A. V. Zablotskii
Moscow Institute of Physics and Technology (State University)
Email: kapustin@mirea.ru
Russian Federation, Moscow oblast, Dolgoprudnyi, 141700