BARBERA, MarcoMarcoBARBERAARGAN, ANDREAANDREAARGANBozzo, EnricoEnricoBozzoBranduardi-Raymont, G.G.Branduardi-RaymontCIARAVELLA, AngelaAngelaCIARAVELLACOLLURA, AlfonsoAlfonsoCOLLURACUTTAIA, FRANCESCOFRANCESCOCUTTAIAGatti, FlavioFlavioGattiJIMENEZ ESCOBAR, AntonioAntonioJIMENEZ ESCOBARLO CICERO, UGOUGOLO CICEROLOTTI, SimoneSimoneLOTTIMACCULI, CLAUDIOCLAUDIOMACCULIMINEO, TERESATERESAMINEONuzzo, FlavioFlavioNuzzoPaltani, S.S.PaltaniParodi, GiancarloGiancarloParodiPIRO, LUIGILUIGIPIRORauw, G.G.RauwSCIORTINO, LUISALUISASCIORTINOSCIORTINO, SalvatoreSalvatoreSCIORTINOVILLA, FabrizioFabrizioVILLA2024-02-212024-02-2120160022-2291http://hdl.handle.net/20.500.12386/34803ATHENA is the L2 mission selected by ESA to pursue the science theme "Hot and Energetic Universe." One of the two focal plane instruments is the X-ray Integral Field Unit, an array of TES microcalorimeters operated at T < 100 mK. To allow the X-ray photons focused by the telescope to reach the detector, windows have to be opened on the cryostat thermal shields. X-ray transparent filters need to be mounted on these open windows to attenuate the IR radiation from warm surfaces, to attenuate RF electromagnetic interferences on TES sensors and SQUID electronics, and to protect the detector from contamination. This paper reviews the ongoing activities driving the design of the X-IFU thermal filters.STAMPAenArticle10.1007/s10909-016-1501-42-s2.0-84956852436https://link.springer.com/article/10.1007/s10909-016-1501-4https://api.elsevier.com/content/abstract/scopus_id/849568524362016JLTP..184..706BFIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering::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