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Evaluation of the ATHENA/WFI instrumental background

von Kienlin, Andreas; Eraerds, Tanja; Bulbul, Esra; Fioretti, Valentine; Gastaldello, Fabio; Grant, Catherine E.; Hall, David; Holland, Andrew; Keelan, Jonathan; Meidinger, Norbert; Molendi, Silvano; Perinati, Emanuele and Rau, Arne (2018). Evaluation of the ATHENA/WFI instrumental background. In: Proceedings Volume 10699, Space Telescopes and Instrumentation 2018: Ultraviolet to Gamma Ray; 106991I (2018), SPIE, 10699 351 - 367.

URL: https://doi.org/10.1117/12.2311987
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Abstract

The Wide Field Imager (WFI) is one of two focal plane instruments of the Advanced Telescope for High-Energy Astrophysics (Athena), ESA’s next large X-ray observatory, planned for launch in the early 2030’s. In the aimed orbit, a halo orbit around L2, the second Lagrange point of the Sun-Earth system the radiation environment, mainly consisting of solar and cosmic protons, electrons and He-ions, could affect the science performance. Furthermore as additional contribution the unfocused hard X-ray background is taken into account. It is important to understand and estimate the expected instrumental background and to investigate measures, like design modifications or analysis methods, which could improve the expected background level in order to achieve the challenging scientific requirement of < 5×10−3 cts/cm2/keV/s. For that purpose, the WFI background working group is investigating possible approaches, which will also be subject to technical feasibility studies. Finally an estimate of the WFI instrumental background for a proposed combination of design optimization and background rejection algorithm is given, showing that WFI is compliant with science background requirements.

Item Type: Conference or Workshop Item
Copyright Holders: 2018 Society of Photo-Optical Instrumentation Engineers
Keywords: Athena/WFI, Instrumental Background, Space Environment, Particle Environment, GEANT4
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Research Group: Centre for Electronic Imaging (CEI)
Item ID: 67114
Depositing User: David Hall
Date Deposited: 08 Oct 2019 15:04
Last Modified: 09 Oct 2019 03:39
URI: http://oro.open.ac.uk/id/eprint/67114
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