Share Email Print

Proceedings Paper

A framework for modeling the detailed optical response of thick, multiple segment, large format sensors for precision astronomy applications
Author(s): Andrew Rasmussen; Pierre Antilogus; Pierre Astier; Chuck Claver; Peter Doherty; Gregory Dubois-Felsmann; Kirk Gilmore; Steven Kahn; Ivan Kotov; Robert Lupton; Paul O'Connor; Andrei Nomerotski; Steve Ritz; Christopher Stubbs
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

Near-future astronomical survey experiments, such as LSST, possess system requirements of unprecedented fidelity that span photometry, astrometry and shape transfer. Some of these requirements flow directly to the array of science imaging sensors at the focal plane. Availability of high quality characterization data acquired in the course of our sensor development program has given us an opportunity to develop and test a framework for simulation and modeling that is based on a limited set of physical and geometric effects. In this paper we describe those models, provide quantitative comparisons between data and modeled response, and extrapolate the response model to predict imaging array response to astronomical exposure. The emergent picture departs from the notion of a fixed, rectilinear grid that maps photo-conversions to the potential well of the channel. In place of that, we have a situation where structures from device fabrication, local silicon bulk resistivity variations and photo-converted carrier patterns still accumulating at the channel, together influence and distort positions within the photosensitive volume that map to pixel boundaries. Strategies for efficient extraction of modeling parameters from routinely acquired characterization data are described. Methods for high fidelity illumination/image distribution parameter retrieval, in the presence of such distortions, are also discussed.

Paper Details

Date Published: 4 August 2014
PDF: 13 pages
Proc. SPIE 9150, Modeling, Systems Engineering, and Project Management for Astronomy VI, 915017 (4 August 2014); doi: 10.1117/12.2057411
Show Author Affiliations
Andrew Rasmussen, SLAC National Accelerator Lab. (United States)
Pierre Antilogus, LPNHE/IN2P3, CNRS, Univ. Pierre et Marie Curie (France)
Pierre Astier, LPNHE/IN2P3, CNRS, Univ. Pierre et Marie Curie (France)
Chuck Claver, National Optical Astronomy Observatory (United States)
Peter Doherty, Harvard Univ. (United States)
Gregory Dubois-Felsmann, SLAC National Accelerator Lab. (United States)
Kirk Gilmore, SLAC National Accelerator Lab. (United States)
Steven Kahn, SLAC National Accelerator Lab. (United States)
Ivan Kotov, Brookhaven National Lab. (United States)
Robert Lupton, Princeton Univ. (United States)
Paul O'Connor, Brookhaven National Lab. (United States)
Andrei Nomerotski, Brookhaven National Lab. (United States)
Steve Ritz, Univ. of California, Santa Cruz (United States)
Christopher Stubbs, Harvard Univ. (United States)

Published in SPIE Proceedings Vol. 9150:
Modeling, Systems Engineering, and Project Management for Astronomy VI
George Z. Angeli; Philippe Dierickx, Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?