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Proceedings Paper

Noiseless, kilohertz-frame-rate, imaging detector based on microchannel plates readout with the Medipix2 CMOS pixel chip
Author(s): Jason McPhate; John Vallerga; Anton Tremsin; Oswald Siegmund; Bettina Mikulec; Allan Clark
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Paper Abstract

A new hybrid imaging detector is described that is being developed for the next generation adaptive optics (AO) wavefront sensors. The detector consists of proximity focused microchannel plates (MCPs) read out by pixelated CMOS application specific integrated circuit (ASIC) chips developed at CERN ("Medipix2"). Each Medipix2 pixel has an amplifier, lower and upper charge discriminators, and a 14-bit counter. The 256×256 array can be read out noiselessly (photon counting) in 286 μs. The Medipix2 is abutable on 3 sides to produce 512× (n*256) pixel devices. The readout can be electronically shuttered down to a temporal window of a few microseconds with an accuracy of 10 ns. Good quantum efficiencies can be achieved from the x-ray (open faced with opaque photocathodes) to the optical (sealed tube with semi-transparent GaAs photocathode).

Paper Details

Date Published: 7 September 2005
PDF: 10 pages
Proc. SPIE 5881, Infrared and Photoelectronic Imagers and Detector Devices, 58810D (7 September 2005); doi: 10.1117/12.618861
Show Author Affiliations
Jason McPhate, Univ. of California, Berkeley (United States)
John Vallerga, Univ. of California, Berkeley (United States)
Anton Tremsin, Univ. of California, Berkeley (United States)
Oswald Siegmund, Univ. of California, Berkeley (United States)
Bettina Mikulec, Univ. of Geneva (Switzerland)
Allan Clark, Univ. of Geneva (Switzerland)

Published in SPIE Proceedings Vol. 5881:
Infrared and Photoelectronic Imagers and Detector Devices
Randolph E. Longshore, Editor(s)

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