Caractérisation des détecteurs infrarouges de la mission spatiale Euclid. : Etude des performances des détecteurs infrarouges H2RG.

Abstract : The Euclid space mission aims to provide answers about the nature of the accelerating expansion of the Universe. To determine the properties of this acceleration, the Euclid space mission will conduct a survey of galaxies on a field of 15,000 deg² field of view. Each field will be studied through imaging (VIS instrument) and spectroscopy (NISP instrument) that requires control of instrumental errors, and particularly the detection system. The study made for the thesis can be summarized in several stages: the first is to assess the performance of NISP starting from the definition of the signal to noise ratio and to derive specifications on the detection system. The second is the study of the need for characterization of the detection system of the instrument, the H2RG infrared detectors. From this study, we show the performance of a detector on a dedicated test bench. The third step is the study of the detection of cosmic rays in flight as well as the realization of a tool to isolate the pixels affected using ground data processing. After evaluating the performance of the algorithm, we will show the results of the data analysis. The last part is the study of the persistence effect affecting H2RG detectors: from the impact of the signal on the observations of NISP, we will define the necessary measures for this purpose. We will describe the data acquisition campaign, accompanied by the analysis and physical interpretation of persistence. These analyzes helped to understand the issues of the persistence effect and were used to develop a model of the effect to quantitatively estimate the impact on the Euclid mission.
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https://tel.archives-ouvertes.fr/tel-01311027
Contributor : Benoît Serra <>
Submitted on : Tuesday, May 3, 2016 - 3:39:01 PM
Last modification on : Thursday, January 18, 2018 - 1:55:56 AM
Long-term archiving on : Tuesday, November 15, 2016 - 7:34:48 PM

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Benoît Serra. Caractérisation des détecteurs infrarouges de la mission spatiale Euclid. : Etude des performances des détecteurs infrarouges H2RG.. Instrumentation et méthodes pour l'astrophysique [astro-ph.IM]. Aix-Marseille Université, 2016. Français. ⟨tel-01311027⟩

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