Some Measurements of the Efficiency for Observing Photoelectrons in Image Intensifiers
- 1 June 1962
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IRE Transactions on Nuclear Science
- Vol. 9 (3) , 239-242
- https://doi.org/10.1109/TNS2.1962.4316001
Abstract
A method is described for measuring the efficiency with which photoelectrons can be detected in an image intensifier system. A weak light is shone onto the first cathode and the photoelectron current measured. The light is then attenuated by a large known factor and compared with the number of spots observed in a given time. A simple system was used to demonstrate this method; a maximum efficiency of 85% was achieved. The results of experiments with a filament scintillation chamber and a Cerenkov detector using image intensifiers are discussed and yield some information about the electron detection efficiency. A simple method of finding the detection threshold is also mentioned with two typical examples of its results.Keywords
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