NDLI: CeB<sub>6</sub>: Emission Performance and Uniformity Compared With LaB<sub>6</sub> for Thermionic RF Guns

Content Provider	IEEE Xplore Digital Library
Author	Bakr, M. Kawai, M. Kii, T. Ohgaki, H.
Copyright Year	1963
Abstract	Thermionic emission performance from single crystals of CeB₆ and LaB₆ was investigated at different operational loads using a test machine, in order to consider CeB₆ as a cathode for thermionic RF guns in the future applications. To evaluate cathode quality and uniformity for long lifetime applications, Miram curves in conjunction with their associated practical work function distribution (PWFD) were applied to the thermionic emission results. The analysis of the PWFD plot revealed that the variation of the peak in the work function and full-width at half-maximum for CeB₆ is very close to that of LaB₆. This suggests that emission performance, uniformity, and expected operational lifetime of a CeB₆ cathode are comparable with LaB₆ cathodes. In addition, previous simulation results of the back bombardment (BB) effect on CeB₆ and LaB₆ emphasized that CeB₆ presents less sensitivity to BB electrons compared with LaB₆ at a 5.5- $\mu \text{s}$ pulse duration and 8-MW RF power. This gives CeB₆ the potential to replace LaB₆ as a thermionic cathode for an RF gun. A complete analysis of the cathode emission performance and PWFD at different operational loads for CeB₆ prior to a prospective real test is presented.
Sponsorship	IEEE Electron Devices Society
Starting Page	1326
Ending Page	1332
Page Count	7
File Size	1290579
File Format	PDF
ISSN	00189383
Volume Number	63
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2016-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Cathodes Radio frequency Thermionic emission Electron beams Current density Temperature measurement Crystals thermionic RF gun. Back bombardment (BB) CeB₆ emission properties LaB₆ Miram curve practical work function distribution (PWFD)
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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