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Proceedings Paper

SPAN: a novel high-speed high-resolution position readout
Author(s): Jonathan S. Lapington; A. A. Breeveld; Michael L. Edgar; J. A. Tandy; Matthew W. Trow
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Paper Abstract

The concept for the 2D position-readout device for the SPAN photon-counting detector is presented with attention to the count rates, spatial resolution, and charge-measurement precision. The electrodes which are deposited on the planar substrate result from charge division induced by a charge cloud, the centroid position of which is encoded by the ratio of charge magnitudes. The SPAN electrode design is analyzed and theorized to permit 1000 x 1000-pixel resolution at 1 MHz. The SPAN spiral-anode six-electrode design is compared to the Vernier-anode twelve-electrode structure for encoding 2D position, and digital precision is analyzed at count rates up to 1 MHz. The SPAN readout affords resolution levels of up to 1/1000 across the entire active area at 8-bit digitization.

Paper Details

Date Published: 1 November 1990
PDF: 9 pages
Proc. SPIE 1344, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy, (1 November 1990); doi: 10.1117/12.23260
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)
J. A. Tandy, Univ. College London (United Kingdom)
Matthew W. Trow, 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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