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http://hdl.handle.net/20.500.12386/30082
Title: | Reproducibility and monitoring of the instrumental particle background for the x-ray integral field unit | Authors: | Cucchetti, E. Pointecouteau, E. Barret, D. LOTTI, Simone MACCULI, CLAUDIO MOLENDI, SILVANO Pajot, F. Peille, P. PIRO, LUIGI 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 9781510619524 |
DOI: | 10.1117/12.2312179 | Bibcode ADS: | 2018SPIE10699E..4NC | Fulltext: | open |
Appears in Collections: | 3.01 Contributi in Atti di convegno |
Files in This Item:
File | Description | Size | Format | |
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cucchetti2018.pdf | postprint | 2.94 MB | Adobe PDF | View/Open |
SPIE106994N.pdf | Pdf editoriale | 2.97 MB | Adobe PDF | View/Open |
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