Random telegraph signal (RTS) noise and other anomalies in the near-infrared detector systems for the Euclid mission

Ralf Kohley; Rémi Barbier; Bogna Kubik; Sylvain Ferriol; Jean-Claude Clemens; Anne Ealet; Aurélia Secroun; Luca Conversi; Paolo Strada

doi:10.1117/12.2233352

5 August 2016 Random telegraph signal (RTS) noise and other anomalies in the near-infrared detector systems for the Euclid mission

Ralf Kohley, Rémi Barbier, Bogna Kubik, Sylvain Ferriol, Jean-Claude Clemens, Anne Ealet, Aurélia Secroun, Luca Conversi, Paolo Strada

Author Affiliations +

Proceedings Volume 9915, High Energy, Optical, and Infrared Detectors for Astronomy VII; 99150H (2016) https://doi.org/10.1117/12.2233352
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

Euclid is an ESA mission to map the geometry of the dark Universe with a planned launch date in 2020. Euclid is optimised for two primary cosmological probes, weak gravitational lensing and galaxy clustering. They are implemented through two science instruments on-board Euclid, a visible imager (VIS) and a near-infrared spectro-photometer (NISP), which are being developed and built by the Euclid Consortium instrument development teams. The NISP instrument contains a large focal plane assembly of 16 Teledyne HgCdTe H2RG detectors with 2.3μm cut-off wavelength and SIDECAR readout electronics. The performance of the detector systems is critical to the science return of the mission and extended on-ground tests are being performed for characterisation and calibration purposes. Special attention is given also to effects even on the scale of individual pixels, which are difficult to model and calibrate, and to identify any possible impact on science performance. This paper discusses a variety of undesired pixel behaviour including the known effect of random telegraph signal (RTS) noise based on initial on-ground test results from demonstrator model detector systems. Some stability aspects of the RTS pixel populations are addressed as well.

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Ralf Kohley, Rémi Barbier, Bogna Kubik, Sylvain Ferriol, Jean-Claude Clemens, Anne Ealet, Aurélia Secroun, Luca Conversi, and Paolo Strada "Random telegraph signal (RTS) noise and other anomalies in the near-infrared detector systems for the Euclid mission", Proc. SPIE 9915, High Energy, Optical, and Infrared Detectors for Astronomy VII, 99150H (5 August 2016); https://doi.org/10.1117/12.2233352

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KEYWORDS

Cadmium sulfide

Sensors

Interference (communication)

Staring arrays

Electronics

Computer simulations

Detection and tracking algorithms

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