Photoemission from K–Te photocathodes
- 9 December 1996
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 69 (24) , 3641-3643
- https://doi.org/10.1063/1.117009
Abstract
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.Keywords
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