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|Title:||Reproducibility and monitoring of the instrumental particle background for the x-ray integral field unit||Authors:||Cucchetti, E.
Pratt, G. W.
|Issue Date:||2018||Volume:||Space Telescopes and Instrumentation 2018: Ultraviolet to Gamma Ray||Editors:||den Herder, Jan-Willem A.; Nikzad, Shouleh; Nakazawa, Kazuhiro||Series:||PROCEEDINGS OF SPIE||Number:||10699||First Page:||106994N||Abstract:||The X-ray Integral Field Unit (X-IFU) is the cryogenic imaging spectrometer on board the future X-ray observatory Athena. With a hexagonal array of 3840 AC-biased Transition Edge Sensors (TES), it will provide narrow-field observations (5' equivalent diameter) with unprecedented high spectral resolution (2.5 eV up to 7 keV) over the 0.2 - 12 keV bandpass. Throughout its observations, the X-IFU will face various sources of X-ray background. Specifically, the so-called Non-X-ray Background (NXB) caused by the interaction of high-energy cosmic rays with the instrument, may lead to a degradation of its sensitivity in the observation of faint extended sources (e.g. galaxy clusters outskirts). To limit this effect, a cryogenic anti-coincidence detector (CryoAC) will be placed below the detector plane to lower the NXB level down to the required level of 5⊗10<SUP>-3</SUP> cts/s/cm<SUP>2</SUP>/keV over 2 - 10 keV. In this contribution, we investigate ways to accurately monitor the NXB and ensure the highest reproducibility in-flight. Using the limiting science case of the background-dominated observation of galaxy clusters outskirts, we demonstrate that a reproducibility of 2% on the absolute knowledge of the background is required to perform driving science objectives, such as measuring abundances and turbulence in the outskirts. Monitoring of the NXB in-flight through closed observations, the detector's CryoAC or the companion instrument (Wide Field Imager) will be used to meet this requirement.||Conference Name:||Space Telescopes and Instrumentation 2018: Ultraviolet to Gamma Ray||Conference Place:||Austin, Texas, United States||Conference Date:||10-15 June, 2018||URI:||http://hdl.handle.net/20.500.12386/30082||URL:||https://www.spiedigitallibrary.org/conference-proceedings-of-spie/10699/2312179/Reproducibility-and-monitoring-of-the-instrumental-particle-background-for-the/10.1117/12.2312179.full?SSO=1||ISSN:||0277-786X||ISBN:||9781510619517
|Appears in Collections:||3.01 Contributi in Atti di convegno|
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checked on Jun 25, 2021
checked on Jun 25, 2021
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