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Proceedings Paper

Development And Testing Of A Prototype Mosaic Wedge-And-Strip Anode Detector
Author(s): A. Rasmussen; C. Martin
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Paper Abstract

We describe a preliminary laboratory study of a prototype mosaic wedge-and-strip anode, a new class of readout system that will furnish large format, high resolution microchannel plate detectors with comparatively simple readout electronics. The goals of this study were to demonstrate the linearity of the mosaic anode algorithm, and to verify the predicted resolution performance in a realistic detector configuration. We find that the nonlinearity introduced at the boundary between two anodes is limited to 50-100 pm. We also show that the spatial resolution of the detector is limited mainly by partition noise to ~ 35 μm (FWHM) at a gain of 2 x 107. We have also begun a systematic investigation of the charge distribution arriving at the anode. Using the relative charges arriving on the two anodes of our mosaic pattern, we have determined the detailed shape of the distribution and its dependence on MCP-anode voltage, MCP voltage, and pulse height. We find a significant dependence of the profile on pulse height, which can introduce a pulse height dependence to the centroid calculation, particularly near the anode edges. We discuss improved anode designs which will achieve the optimal performance.

Paper Details

Date Published: 27 November 1989
PDF: 13 pages
Proc. SPIE 1159, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy and Atomic Physics, (27 November 1989); doi: 10.1117/12.962609
Show Author Affiliations
A. Rasmussen, Columbia University (United States)
C. Martin, Columbia University (United States)

Published in SPIE Proceedings Vol. 1159:
EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy and Atomic Physics
Charles J. Hailey; Oswald H. W. Siegmund, Editor(s)

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