Share Email Print

Proceedings Paper

Dependence of quantum efficiency of alkali halide photocathodes on the radiation incidence angle
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

We studied variation efficiencies of CsI, KBr and KI- evaporated reflective planar phototcathodes with the angle of radiation incidence in the spectral range of 25-115 nm. The photocurrent increases with the photon incidence angle for short wavelengths, while it changes only approximately 5 percent at wavelengths approximately 90-115 nm. The theoretical calculations of the photocathode angular response based on the absorption length of the photons and the escape length of the photoelectronics are in a relatively good agreement with the measured data. A detailed study of the detection efficiency angular variation for the microchannel plates with CsI, KI and KBr photocathodes in the spectral range of 25-191 nm is also presented. Heat annealing of the planar photocathodes did not result in any significant variation in their angular response.

Paper Details

Date Published: 22 October 1999
PDF: 11 pages
Proc. SPIE 3765, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy X, (22 October 1999); doi: 10.1117/12.366524
Show Author Affiliations
Anton S. Tremsin, Univ. of California/Berkeley (United States)
Oswald H. W. Siegmund, Univ. of California/Berkeley (United States)

Published in SPIE Proceedings Vol. 3765:
EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy X
Oswald H. W. Siegmund; Kathryn A. Flanagan, Editor(s)

© SPIE. Terms of Use
Back to Top