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http://hdl.handle.net/20.500.12386/30498
Title: | Thermal modelling of the ATHENA X-IFU filters | Authors: | SCIORTINO, LUISA LO CICERO, UGO FERRUGGIA BONURA, Salvatore D'ANCA, FABIO BUTTACAVOLI, ANTONINO PUCCIO, ELENA Barbera, Marco |
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: | 1069950 | Abstract: | The X-IFU instrument of the ATHENA mission requires a set of thermal filters to reduce the photon shot noise onto its cryogenic detector and to protect it from molecular contamination. A set of five filters, operating at different nominal temperatures corresponding to the cryostat shield temperatures, is currently baselined. The knowledge of the actual filter temperature profiles is crucial to have a good estimation of the radiative load on the detector. Furthermore, a few filters may need to be warmed-up to remove contaminants and it is necessary to ensure that a threshold temperature is reached throughout the filters surface. For these reasons, it is fundamental to develop a thermal modeling of the full set of filters in a representative configuration. The baseline filter is a polyimide membrane 45 nm thick coated with 30 nm of highpurity aluminum, mechanically supported by a metallic honeycomb mesh. In this paper, we describe the implemented thermal modeling and report the results obtained in different studies: (i) a trade-off analysis on how to reach a minimum target temperature throughout the outer filter, (ii) a thermal analysis when varying the emissivity of the filter surfaces, and (iii) the effect of removing one of the filters. | Note: | Copyright 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. | 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/20.500.12386/30498 | URL: | https://www.spiedigitallibrary.org/conference-proceedings-of-spie/10699/2314453/Thermal-modelling-of-the-ATHENA-X-IFU-filters/10.1117/12.2314453.full | ISSN: | 0277-786X | ISBN: | 9781510619517 9781510619524 |
DOI: | 10.1117/12.2314453 | Bibcode ADS: | 2018SPIE10699E..50S | Fulltext: | open |
Appears in Collections: | 3.01 Contributi in Atti di convegno |
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2018 Sciortino - Thermal modelling of the ATHENA X-IFU filters.pdf | Pdf editoriale | 1.04 MB | Adobe PDF | View/Open |
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