PUCCIO, ELENAELENAPUCCIOTODARO, MichelaMichelaTODAROLO CICERO, UGOUGOLO CICEROSCIORTINO, LUISALUISASCIORTINOLaurent, PhilippePhilippeLaurentFerrando, PhilippePhilippeFerrandoGiglia, AngeloAngeloGigliaNannarone, StefanoStefanoNannaroneBARBERA, MarcoMarcoBARBERA2023-10-092023-10-0920202329-4124http://hdl.handle.net/20.500.12386/34447Advanced Telescope for High-Energy Astrophysics is a large-class astrophysics space mission selected by the European Space Agency to study the theme "Hot and Energetic Universe."The mission essentially consists of a large effective area x-ray telescope and two detectors: the X-ray Integral Field Unit (X-IFU) and the Wide Field Imager (WFI). Both instruments require filters to shield from out-of-band radiation while providing high transparency to x-rays. The mission is presently in phase B; thus, to consolidate the preliminary design, investigated filter materials need to be properly characterized by experimental test campaigns. We report results from high-resolution x-ray transmission measurements performed using different synchrotron radiation beamlines to assess the filter calibration accuracy and mitigate the risk related to selecting a unique calibration facility. The main goals of these test campaigns are (i) to verify the compliance of the investigated filter design to the scientific requirements, (ii) to develop an accurate x-ray transmission model, and (iii) to start identifying suitable measurement facilities and achievable accuracy for the flight filters calibration program. In particular, the x-ray transmission model of the X-IFU and WFI filters has been refined within the edges of Al, C, N, and O by deriving the optical constants from two reference samples measured by synchrotron light. The achievable filter calibration accuracy has been estimated by evaluating the agreement between the best-fit according to the developed transmission model and the experimental data.ELETTRONICOenArticle10.1117/1.JATIS.6.3.0380032-s2.0-85092739415https://www.spiedigitallibrary.org/journals/Journal-of-Astronomical-Telescopes-Instruments-and-Systems/volume-6/issue-3/038003/Synchrotron-x-ray-transmission-measurements-and-modeling-of-filters-investigated/10.1117/1.JATIS.6.3.038003.full?SSO=1https://api.elsevier.com/content/abstract/scopus_id/85092739415FIS/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