Photoemission from K–Te photocathodes

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 q...

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Published in:Applied physics letters 1996-12, Vol.69 (24), p.3641-3643
Main Authors: Bisero, D., van Oerle, B. M., Ernst, G. J., Verschuur, J. W. J., Witteman, W. J.
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Language:English
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container_end_page 3643
container_issue 24
container_start_page 3641
container_title Applied physics letters
container_volume 69
creator Bisero, D.
van Oerle, B. M.
Ernst, G. J.
Verschuur, J. W. J.
Witteman, W. J.
description 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.
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title Photoemission from K–Te photocathodes
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