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Anisotropy of thermionic electron emission values for LaB6single‐crystal emitter cathodes

 

作者: P. H. Schmidt,   D. C. Joy,   L. D. Longinotti,   H. J. Leamy,   S. D. Ferris,   Z. Fisk,  

 

期刊: Applied Physics Letters  （AIP Available online 1976）
卷期: Volume 29, issue 7  

页码: 400-401

 

ISSN:0003-6951

 

年代: 1976

 

DOI:10.1063/1.89119

 

出版商: AIP

 

数据来源: AIP

 

摘要:

Measurement of thermionic electron emission values for pointed LaB6single‐crystal emitter cathodes has shown that ⟨110⟩ axial orientations yield emission values ten times higher than ⟨100⟩ orientations at 1545 °K. Minimum values were obtained for the ⟨510⟩ directions. These findings seem encouraging in achieving perhaps two orders of magnitude higher emission fluxes as compared to tungsten emitters.

 

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