12 months of cold operations, a first look at CCD273 post-irradiation

Zoe Lee-Payne; Jesper Skottfelt; Ben Dryer; David Hall; Andrew Holland

doi:10.1117/12.2562340

13 December 2020 12 months of cold operations, a first look at CCD273 post-irradiation

Zoe Lee-Payne, Jesper Skottfelt, Ben Dryer, David Hall, Andrew Holland

Proceedings Volume 11454, X-Ray, Optical, and Infrared Detectors for Astronomy IX; 114541X (2020) https://doi.org/10.1117/12.2562340
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

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Abstract

The Euclid mission aims to image the far galaxies of our universe to better understand and characterise the structure of dark matter and energy. This galactic survey requires highly accurate images to document the effects of dark matter via weak lensing on the shapes of galaxies. Over the course of the mission, radiation damage to the CCDs will cause an increase in detector Charge Transfer Inefficiency (CTI) reducing the accuracy of measurements [2]. To analyse this, we undertook a long-term study on the evolution of CTI on the CCDs in the Euclid VIS focal plane, after a cryogenic irradiation campaign at 153 K. Following the irradiation, the device has been monitored for 12 months of operation under mission representative conditions. We present the CTI evolution as measured by Extended Pixel Edge Response (EPER) over this time.

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Zoe Lee-Payne, Jesper Skottfelt, Ben Dryer, David Hall, and Andrew Holland "12 months of cold operations, a first look at CCD273 post-irradiation", Proc. SPIE 11454, X-Ray, Optical, and Infrared Detectors for Astronomy IX, 114541X (13 December 2020); https://doi.org/10.1117/12.2562340

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