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Proceedings Paper

MCP-Medipix2 hybrid detector for AO wavefront sensors
Author(s): John Vallerga; Jason McPhate; Bettina Mikulec; Allan Clark; Oswald Siegmund
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Paper Abstract

A hybrid optical detector being developed at Berkeley has most of the attributes desired for the next generation AO wavefront sensors. The detector consists of proximity focused MCPs read out by a multi-pixel application specific integrated circuit (ASIC) chip developed at CERN ("Medipix2") with individual pixels that amplify, discriminate and count input events. The detector has 256 x 256 pixels, zero readout noise (photon counting) and can be read out at 1kHz frame rates. We will report on the progress achieved after two years of our three year development effort for this detector technology funded as part of the Adaptive Optics Development Program managed by the National Optical Astronomy Observatory. Details on the first vacuum tube constructed with a Medipix2 ASIC along with the fast kHz parallel electronic readout are presented. We also describe a new hybrid detector design based on HgCdTe APD arrays coupled to a Medipix2 readout that could bring zero readout noise at high frame rates to the near IR regime.

Paper Details

Date Published: 27 June 2006
PDF: 11 pages
Proc. SPIE 6272, Advances in Adaptive Optics II, 62724G (27 June 2006); doi: 10.1117/12.674131
Show Author Affiliations
John Vallerga, Space Sciences Lab., Univ. of California, Berkeley (United States)
Jason McPhate, Space Sciences Lab., Univ. of California, Berkeley (United States)
Bettina Mikulec, Univ. of Geneva (Switzerland)
Allan Clark, Univ. of Geneva (Switzerland)
Oswald Siegmund, Space Sciences Lab., Univ. of California, Berkeley (United States)

Published in SPIE Proceedings Vol. 6272:
Advances in Adaptive Optics II
Brent L. Ellerbroek; Domenico Bonaccini Calia, Editor(s)

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