Measurement of Excess Ba in Practical Oxide Coated Cathodes
作者:
L. A. Wooten,
George E. Moore,
W. G. Guldner,
期刊:
Journal of Applied Physics
(AIP Available online 1955)
卷期:
Volume 26,
issue 8
页码: 937-942
ISSN:0021-8979
年代: 1955
DOI:10.1063/1.1722141
出版商: AIP
数据来源: AIP
摘要:
These papers, designated I and II, discuss measurements of excess Ba (and/or Sr) in practical oxide coated cathodes. More than 300 cathodes of various designs were prepared, aged for periods up to 50 000 hours, tested thermionically, and then analyzed chemically.Despite its great importance, the accurate measurement of excess Ba in practical cathodes is a problem whose complexity has not been adequately realized. Although the methods of the present experiments avoided many difficulties, limitations still exist. The difficulties and limitations, as well as the capabilities, can best be discussed in terms of typical measurements; we emphasize this aspect in I.
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