SCIORTINO, LUISALUISASCIORTINOLO CICERO, UGOUGOLO CICEROFERRUGGIA BONURA, SalvatoreSalvatoreFERRUGGIA BONURAD'ANCA, FABIOFABIOD'ANCABUTTACAVOLI, ANTONINOANTONINOBUTTACAVOLIPUCCIO, ELENAELENAPUCCIOBarbera, MarcoMarcoBarbera2021-02-192021-02-192018978151061951797815106195240277-786Xhttp://hdl.handle.net/20.500.12386/30498The 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.ELETTRONICOenConference paper10.1117/12.23144532-s2.0-85051851431000452819200119https://www.spiedigitallibrary.org/conference-proceedings-of-spie/10699/2314453/Thermal-modelling-of-the-ATHENA-X-IFU-filters/10.1117/12.2314453.full2018SPIE10699E..50SFIS/05 - ASTRONOMIA E ASTROFISICAScienze Fisiche Settori ERC (ERC) di riferimento::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation::PE9_17 Instrumentation – telescopes, detectors and techniques