Photoemission from K–Te photocathodes

D. Bisero, B.M. van Oerle, G.J. Ernst, J.W.J. Verschuur, W.J. Witteman

Research output: Contribution to journalArticleAcademicpeer-review

12 Citations (Scopus)
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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.
Original languageEnglish
Pages (from-to)3641-3642
Number of pages2
JournalApplied physics letters
Volume69
Issue number24
DOIs
Publication statusPublished - 1996

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