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 language | English |
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Pages (from-to) | 3641-3642 |
Number of pages | 2 |
Journal | Applied physics letters |
Volume | 69 |
Issue number | 24 |
DOIs | |
Publication status | Published - 1996 |