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SINGLE PHOTOELECTRON EXCITATION OF PHOSPHORS
S. R. SMITH and J. L. LOWRANCE
Publications of the Astronomical Society of the Pacific
Vol. 84, No. 497 (February 1972), pp. 154-160
Published by: Astronomical Society of the Pacific
Stable URL: http://www.jstor.org/stable/40675197
Page Count: 7
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The statistical variation in the output intensity of single-stage image intensifiers has been measured under single photoelectron excitation. Early measurements on tubes with both P-ll and P-20 phosphors indicated that the intensity distribution is not peaked but shows instead the maximum probability of occurrence for the smallest possible output intensities. These measurements, made on only two samples, were at variance with published results of similar measurements on multistage image intensifiers. Later measurements with improved statistics show a peaked distribution. The question is of fundamental importance in the implementation of systems that detect single photoelectron events in a two-dimensional image.
Publications of the Astronomical Society of the Pacific © 1972 The University of Chicago Press