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Proceedings Paper

The TESS camera: modeling and measurements with deep depletion devices
Author(s): Deborah F. Woods; Roland Vanderspek; Robert MacDonald; Edward Morgan; Joel Villasenor; Carolyn Thayer; Barry Burke; Christian Chesbrough; Michael Chrisp; Kristin Clark; Gabor Furesz; Alexandria Gonzales; Tam Nguyen; Gregory Prigozhin; Brian Primeau; George Ricker; Timothy Sauerwein; Vyshnavi Suntharalingam
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Paper Abstract

The Transiting Exoplanet Survey Satellite, a NASA Explorer-class mission in development, will discover planets around nearby stars, most notably Earth-like planets with potential for follow up characterization. The all-sky survey requires a suite of four wide field-of-view cameras with sensitivity across a broad spectrum. Deep depletion CCDs with a silicon layer of 100 μm thickness serve as the camera detectors, providing enhanced performance in the red wavelengths for sensitivity to cooler stars. The performance of the camera is critical for the mission objectives, with both the optical system and the CCD detectors contributing to the realized image quality. Expectations for image quality are studied using a combination of optical ray tracing in Zemax and simulations in Matlab to account for the interaction of the incoming photons with the 100 μm silicon layer. The simulations include a probabilistic model to determine the depth of travel in the silicon before the photons are converted to photo-electrons, and a Monte Carlo approach to charge diffusion. The charge diffusion model varies with the remaining depth for the photo-electron to traverse and the strength of the intermediate electric field. The simulations are compared with laboratory measurements acquired by an engineering unit camera with the TESS optical design and deep depletion CCDs. In this paper we describe the performance simulations and the corresponding measurements taken with the engineering unit camera, and discuss where the models agree well in predicted trends and where there are differences compared to observations.

Paper Details

Date Published: 29 July 2016
PDF: 14 pages
Proc. SPIE 9904, Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave, 99042C (29 July 2016); doi: 10.1117/12.2231296
Show Author Affiliations
Deborah F. Woods, MIT Lincoln Lab. (United States)
Roland Vanderspek, MIT Kavli Institute for Astrophysics and Space Research (United States)
Robert MacDonald, MIT Lincoln Lab. (United States)
Edward Morgan, MIT Kavli Institute for Astrophysics and Space Research (United States)
Joel Villasenor, MIT Kavli Institute for Astrophysics and Space Research (United States)
Carolyn Thayer, MIT Kavli Institute for Astrophysics and Space Research (United States)
Barry Burke, MIT Lincoln Lab. (United States)
Christian Chesbrough, MIT Lincoln Lab. (United States)
Michael Chrisp, MIT Lincoln Lab. (United States)
Kristin Clark, MIT Lincoln Lab. (United States)
Gabor Furesz, MIT Kavli Institute for Astrophysics and Space Research (United States)
Alexandria Gonzales, MIT Kavli Institute for Astrophysics and Space Research (United States)
Tam Nguyen, MIT Kavli Institute for Astrophysics and Space Research (United States)
Gregory Prigozhin, MIT Kavli Institute for Astrophysics and Space Research (United States)
Brian Primeau, MIT Lincoln Lab. (United States)
George Ricker, MIT Kavli Institute for Astrophysics and Space Research (United States)
Timothy Sauerwein, MIT Kavli Institute for Astrophysics and Space Research (United States)
Vyshnavi Suntharalingam, MIT Lincoln Lab. (United States)


Published in SPIE Proceedings Vol. 9904:
Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave
Howard A. MacEwen; Giovanni G. Fazio; Makenzie Lystrup; Natalie Batalha; Nicholas Siegler; Edward C. Tong, Editor(s)

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