Photoemission from K{endash}Te photocathodes

Journal Article · Sun Dec 01 04:00:00 EST 1996 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.117009· OSTI ID:397403

Bisero, D; van Oerle, B M ^[1]; Ernst, G J; Verschuur, J W; Witteman, W J ^[2]

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1. NCLR, 7500 CR Enschede (the Netherlands)
2. Department of Applied Physics, University of Twente, 7500 AE Enschede (the Netherlands)

In this letter the photoemissive properties of K{endash}Te films produced under ultrahigh vacuum conditions are reported. K{endash}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{percent}, measured just after evaporation; this value decreased in a few minutes to a stable quantum efficiency of 8.3{percent}. The reported results show that K{endash}Te can be considered a promising material for the use as a photocathode in photoinjectors. {copyright} {ital 1996 American Institute of Physics.}

• OSTI ID: 397403
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 24 Vol. 69; ISSN 0003-6951; ISSN APPLAB
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
FABRICATION
FREE ELECTRON LASERS
PHOTOCATHODES
PHOTOEMISSION
POTASSIUM
QUANTUM EFFICIENCY
TELLURIUM
THIN FILMS