Photoemission from K–Te photocathodes
作者:
D. Bisero,
B. M. van Oerle,
G. J. Ernst,
J. W. J. Verschuur,
W. J. Witteman,
期刊:
Applied Physics Letters
(AIP Available online 1996)
卷期:
Volume 69,
issue 24
页码: 3641-3643
ISSN:0003-6951
年代: 1996
DOI:10.1063/1.117009
出版商: AIP
数据来源: AIP
摘要:
In this letter the photoemissive properties of K–Te films produced under ultrahigh vacuum conditions are reported. K–Te photocathodes were fabricated by vapor deposition of Te and K onto a Mo substrate into the preparation chamber of the Free Electron Laser of the University of Twente. The highest quantum efficiency obtained at 259 nm was 11.1%, measured just after evaporation; this value decreased in a few minutes to a stable quantum efficiency of 8.3%. The reported results show that K–Te can be considered a promising material for the use as a photocathode in photoinjectors. ©1996 American Institute of Physics.
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