Laboratory measurements of instrumental signatures of the LSST camera focal plane

Adam Snyder; Aurélien Barrau; Andrew Bradshaw; Boyd Bowdish; James Chiang; Celine Combet; Seth Digel; Richard Dubois; Ludovic Eraud; Claire Juramy; Craig Lage; Travis Lange; Myriam Migliore; Andrei Nomerotski; Paul O'Connor; Hye Yun Park; Andrew Rasmussen; Kevin Reil; Aaron Roodman; Adrian Shestakov; Yousuke Utsumi; Duncan Wood

doi:10.1117/12.2562915

14 December 2020 Laboratory measurements of instrumental signatures of the LSST camera focal plane

Adam Snyder, Aurélien Barrau, Andrew Bradshaw, Boyd Bowdish, James Chiang, Celine Combet, Seth Digel, Richard Dubois, Ludovic Eraud, Claire Juramy, Craig Lage, Travis Lange, Myriam Migliore, Andrei Nomerotski, Paul O'Connor, Hye Yun Park, Andrew Rasmussen, Kevin Reil, Aaron Roodman, Adrian Shestakov, Yousuke Utsumi, Duncan Wood

Author Affiliations +

Proceedings Volume 11454, X-Ray, Optical, and Infrared Detectors for Astronomy IX; 1145439 (2020) https://doi.org/10.1117/12.2562915
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

Electro-optical testing and characterization of the Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST) Camera focal plane, consisting of 205 charge-coupled devices (CCDs) arranged into 21 stand-alone Raft Tower Modules (RTMs) and 4 Corner Raft Tower Modules (CRTMs), is currently being performed at the SLAC National Accelerator Laboratory. Testing of the camera sensors is performed using a set of custom-built optical projectors, designed to illuminate the full focal plane or specific regions of the focal plane with a series of light illumination patterns: the crosstalk projector, the flat illuminator projector, and the spot grid projector. In addition to measurements of crosstalk, linearity and full well, the ability to project realistically-sized sources, using the spot grid projector, makes possible unique measurements of instrumental signatures such as deferred charge distortions, astrometric shifts due to sensor effects, and the brighter-fatter effect, prior to camera first light. Here we present the optical projector designs and usage, the electro-optical measurements and how these results have been used in testing and improving the LSST Camera instrumental signature removal algorithms.

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Adam Snyder, Aurélien Barrau, Andrew Bradshaw, Boyd Bowdish, James Chiang, Celine Combet, Seth Digel, Richard Dubois, Ludovic Eraud, Claire Juramy, Craig Lage, Travis Lange, Myriam Migliore, Andrei Nomerotski, Paul O'Connor, Hye Yun Park, Andrew Rasmussen, Kevin Reil, Aaron Roodman, Adrian Shestakov, Yousuke Utsumi, and Duncan Wood "Laboratory measurements of instrumental signatures of the LSST camera focal plane", Proc. SPIE 11454, X-Ray, Optical, and Infrared Detectors for Astronomy IX, 1145439 (14 December 2020); https://doi.org/10.1117/12.2562915

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