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Proceedings Paper

SPAN high-speed photon-counting detector for the XMM optical monitor
Author(s): Jonathan S. Lapington; Michael L. Edgar; Mark S. Cropper; Keith O. Mason
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Paper Abstract

The compact photon-counting detector SPAN is described which offers 25-micron spatial resolution and a 25-mm imaging diam. The SPAN detector incorporates position readout within a vacuum-sealed optical-intensifier tube, and a photocathode is used to sense the images with high-blue and near-UV sensitivity. A microchannel-plate intensifier generates an electron cloud that is measured with a position-sensitive readout developed for this application. The position-sensitive readout is a conductive device that, in the context of the SPAN, permits a high count rate and spatial resolution greater than the charge-measurement precision of each electrode. Preliminary photon counting is demonstrated, and the results suggest that the SPAN has a resolution of better than 1/1000 and effective linearity with 8-bit digitization.

Paper Details

Date Published: 1 November 1990
PDF: 8 pages
Proc. SPIE 1344, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy, (1 November 1990); doi: 10.1117/12.23270
Show Author Affiliations
Jonathan S. Lapington, Univ. College London (United Kingdom)
Michael L. Edgar, Univ. College London (United Kingdom)
Mark S. Cropper, Univ. College London (United Kingdom)
Keith O. Mason, Univ. College London (United Kingdom)

Published in SPIE Proceedings Vol. 1344:
EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy
Oswald H. W. Siegmund; Hugh S. Hudson, Editor(s)

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