Photoelectron energy spectra of opaque photocathodes in the extreme and far ultravioletMeasurements of the EUV quantum detection efficiency (QDE) of opaque RbBr, CsBr, and KBr photocathodes are described and investigations of their photoemission characteristics over the 44-1560 A wavelength range are reported. The results show that high QDEs can be obtained in the EUV. Narrow QDE peaks at soft X-ray wavelengths occur at slightly different wavelengths for each of the materials studied. The long-wavelength thresholds vary according to the material band gap. Data on the photoemission from the photocathode layer on the microchannel plate interchannel web area are used to determine the number and energy distribution of the emitted photoelelectrons as a function of wavelength.
Document ID
19920037625
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Siegmund, Oswald H. W. (California Univ. Berkeley, CA, United States)
Gaines, Geoffrey A. (California, University Berkeley, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1990
Subject Category
Optics
Meeting Information
Meeting: EUV, X-ray and Gamma-Ray Instrumentation for Astronomy