1. Laboratory Measurements of Instrumental Signatures of the LSST Camera Focal Plane
- Author
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Snyder, Adam, Barrau, Aurelien, Bradshaw, Andrew, Bowdish, Boyd, Chiang, James, Combet, Celine, Digel, Seth, Dubois, Richard, Eraud, Ludovic, Juramy, Claire, Lage, Craig, Lange, Travis, Migliore, Myriam, Nomerotski, Andrei, O'Connor, Paul, Park, HyeYun, Rasmussen, Andrew, Reil, Kevin, Roodman, Aaron, Shestakov, Adrian, Utsumi, Yousuke, and Wood, Duncan
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Astrophysics - Instrumentation and Methods for Astrophysics - 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., Comment: 21 pages, 16 figures. SPIE Astronomical Telescopes + Instrumentation Digital Forum December 2020
- Published
- 2021
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