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Zhurnal Tekhnicheskoi Fiziki, 2017 Volume 87, Issue 1, Pages 106–116 (Mi jtf6347)

This article is cited in 18 papers

Physical electronics

Physical operating principles of scandate cathodes for microwave devices

V. I. Kapustina, I. P. Lia, A. V. Shumanova, Yu. Yu. Lebedinskiib, A. V. Zablotskiib

a JSC Pluton, Moscow
b Moscow Institute of Physics and Technology (State University), Dolgoprudny, Moscow region

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.

Received: 10.05.2016

DOI: 10.21883/JTF.2017.01.44026.1873


 English version:
Technical Physics, 2017, 62:1, 116–126

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© Steklov Math. Inst. of RAS, 2024