Surface features in U-band of ITL devices for the LSST telescope

Armelle Bajat; Asen Christov; Sergey Karpov; Michael Prouza

doi:10.1117/12.2559946

13 December 2020 Surface features in U-band of ITL devices for the LSST telescope

Armelle Bajat, Asen Christov, Sergey Karpov, Michael Prouza

Proceedings Volume 11454, X-Ray, Optical, and Infrared Detectors for Astronomy IX; 114542D (2020) https://doi.org/10.1117/12.2559946
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

The LSST project (Large Survey for Space and Time), Vera Rubin Observatory is designed to observe the deep and wide Universe addressing the questions about dark matter as well as the near Universe with the study of the Milky Way. These observations are conducted by a high-resolution camera, which is made up of 189 4k×4k CCD sensors observing from the UV to the near-infrared. Some sensors supplied by ITL (Imaging Technology Laboratory), present a layer of cleaning residue or non-stoichiometric oxidized silicon adhering the surface after etching and create some non-uniformity in backside charging and irregularities inducing a variation of counting in UV and imprecise photometry. In this paper, we will present the camera and the particularities of the ITL sensors, then, the impact of this layer on the performances of the sensors and finally on the observed astronomical object.

Citation Download Citation

Armelle Bajat, Asen Christov, Sergey Karpov, and Michael Prouza "Surface features in U-band of ITL devices for the LSST telescope", Proc. SPIE 11454, X-Ray, Optical, and Infrared Detectors for Astronomy IX, 114542D (13 December 2020); https://doi.org/10.1117/12.2559946

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