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6 August 2018 Euclid H2RG detectors: Impact of crosshatch patterns on photometric and centroid errors
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Abstract
In the framework of the ESA’s Science programme, the Euclid mission has the objective to map the geometry of the Dark Universe. For the Near Infrared Spectrometer and Photometer instrument (NISP), the state-of-the-art HAWAII-2RG detectors will be used, in association with the SIDECAR ASIC readout electronics. A dedicated test bench has been designed, developed and validated at ESTEC to perform tests on these detectors. This test bench is equipped with a spot projector system as well as a set of LEDs allowing to project the Euclid like beam and perform persistence measurements. The detector under test shows crosshatch patterns that may correspond to sub-pixel variations in Quantum Efficiency or charge redistribution. The goal of the tests was to evaluate the impact of crosshatches patterns on the Euclid photometric performance and centroid calculation after flat fielding correction. The second part of the publication discusses different persistence mitigation tests using the LEDs test set up.
Conference Presentation
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
P.-E. Crouzet, R. Kohley, R. Barbier, P. Strada, B. Shortt, T. Beaufort, S. Blommaert, B. Butler, G. Van Duinkerken, J. Ter haar, F. Lemmel, C. van der Luijt, and H. Smit "Euclid H2RG detectors: Impact of crosshatch patterns on photometric and centroid errors ", Proc. SPIE 10709, High Energy, Optical, and Infrared Detectors for Astronomy VIII, 107090Q (6 August 2018); https://doi.org/10.1117/12.2312692
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