Stability of quantum efficiency and visible light rejection of alkali halide photocathodes

Anton S. Tremsin; Oswald H. W. Siegmund

doi:10.1117/12.394023

28 July 2000 Stability of quantum efficiency and visible light rejection of alkali halide photocathodes

Proceedings Volume 4013, UV, Optical, and IR Space Telescopes and Instruments; (2000) https://doi.org/10.1117/12.394023
Event: Astronomical Telescopes and Instrumentation, 2000, Munich, Germany

Abstract

We have studied the UV sensitivity degradation of CsI and KBr thin films under UV illumination and the stability of their visible light rejection for CsI and KBr opaque photocathodes evaporated on microchannel plates. For both materials the greatest degradation of the relative quantum detection efficiency was observed near the photocathode sensitivity cut off, while there was almost no change in their EUV response. The aging of the photocathodes is likely to be independent of the angle of radiation incidence. Of the two materials the CsI films appeared to be more solar blind and less subject to visible sensitivity activation by UV exposure.

Citation Download Citation

Anton S. Tremsin and Oswald H. W. Siegmund "Stability of quantum efficiency and visible light rejection of alkali halide photocathodes", Proc. SPIE 4013, UV, Optical, and IR Space Telescopes and Instruments, (28 July 2000); https://doi.org/10.1117/12.394023

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