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High resolution decoding of Multi-Anode Microchannel Array detectorsThe Multi-Anode Microchannel Array (MAMA) is a photon counting detector which utilizes a photocathode for photon to electron conversion, a microchannel plate (MCP) for signal amplification and a proximity focused anode array for position sensitivity. The detector electronics decode the position of an event through coincidence discrimination. The decoding algorithm which associates a given event with the appropriate pixel is determined by the geometry of the array. A new algorithm incorporated into a CMOS Application Specific Integrated Circuit (ASIC) decoder which improves the pixel spatial resolution is described. The new algorithm does not degrade the detector throughput and does not require any modifications to the detector tube. The standard MAMA detector has a pixel size of 25 x 25 square microns, but with the new decoder circuit the pixel size is reduced to 12.5 x 12.5 square microns. We have built the first set of decode electronics utilizing the new ASIC chips and report here on the first imaging tests of this system.
Document ID
19930050382
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kasle, David B.
(NASA Goddard Space Flight Center Greenbelt, MD; Stanford Univ., CA, United States)
Morgan, Jeffrey S.
(Stanford Univ. CA, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1991
Publication Information
Publication: In: EUV, X-ray, and gamma-ray instrumentation for astronomy II; Proceedings of the Meeting, San Diego, CA, July 24-26, 1991 (A93-34376 13-35)
Publisher: Society of Photo-Optical Instrumentation Engineers
Subject Category
Instrumentation And Photography
Accession Number
93A34379
Funding Number(s)
CONTRACT_GRANT: NAS5-30387
CONTRACT_GRANT: NAS5-29389
Distribution Limits
Public
Copyright
Other

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