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Proceedings Paper

Performance characteristics of SPAN position readout systems
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Paper Abstract

The SPAN position readout device uses a charge division and measurement method to encode the coordinates of the centroid of a charge cloud and thus provides a technique for imaging with photon counting detectors of various formats; for example, microchannel plate intensifiers and gas proportional counters. Its principle of operation causes the position resolution to substantially exceed the charge measurement precision. The reduced signal to noise requirement compared with the competitive devices of comparable imaging format size enables the SPAN readout system to operate at higher input count rates. We present imaging performance results from SPAN readout systems incorporated in several detector formats. The dependence of the physical parameters of the SPAN pattern design on the detector type and geometry together with the performance trade-offs between speed and resolution for these particular detectors are discussed. The practical implementation of the SPAN readout decoding algorithm is outlined. We describe the experimental applications for which the SPAN readout system has been proposed.

Paper Details

Date Published: 8 October 1992
PDF: 12 pages
Proc. SPIE 1743, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy III, (8 October 1992); doi: 10.1117/12.130692
Show Author Affiliations
Jonathan S. Lapington, Univ. College London (United Kingdom)
A. A. Breeveld, Univ. College London (United Kingdom)
Michael L. Edgar, Univ. College London (United Kingdom)
Alan Smith, Univ. College London (United Kingdom)


Published in SPIE Proceedings Vol. 1743:
EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy III
Oswald H. W. Siegmund, Editor(s)

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