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Proceedings Paper

Miniature Imaging Photon Detector
Author(s): A. H. Greenaway; A. Lyons; I. McWhirter; D. Rees; A. Cochrane
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Paper Abstract

A compact, lightweight, photon-counting device with spatial capabilities will be described. Briefly, a photoelectron liberated at the photocathode is relayed, by a proximity focussed lens, to a triple microchannel plate intensifier, of which the first plate is filmed to protect the photocathode from damage by ion feedback. The resultant electron cascade is incident on one of a variety of possible position sensitive encoders. The position of arrival of the original photon is equated with the centroid of this charge cloud. Results obtained with present devices will be presented and major factors which limit the performance of such detectors, in terms of spatial resolution, count rate and lifetime, will be examined. This leads to the prediction of the ultimate limits achievable with practical devices of this nature.

Paper Details

Date Published: 16 November 1982
PDF: 3 pages
Proc. SPIE 0331, Instrumentation in Astronomy IV, (16 November 1982); doi: 10.1117/12.933477
Show Author Affiliations
A. H. Greenaway, University College London (United Kingdom)
A. Lyons, University College London (United Kingdom)
I. McWhirter, University College London (United Kingdom)
D. Rees, University College London (United Kingdom)
A. Cochrane, Instrument Technology Ltd. (United Kingdom)

Published in SPIE Proceedings Vol. 0331:
Instrumentation in Astronomy IV
David L. Crawford, Editor(s)

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