X-ray tests of the ATHENA mirror modules in BEaTriX: from design to reality

B. Salmaso*, S. Basso, M. Ghigo, D. Spiga, G. Vecchi, G. Sironi, V. Cotroneo, P. Conconi, E. Redaelli, A. Bianco, G. Pareschi, G. Tagliaferri, D. Sisana, C. Pelliciari, M. Fiorini, S. Incorvaia, M. Uslenghi, L. Paoletti, C. Ferrari, R. LolliA. Zappettini, M. Sanchez Del Rio, G. Parodi, V. Burwitz, S. Rukdee, G. Hartner, T. Müller, T. Schmidt, A. Langmeier, D. D. Ferreira, S. Massahi, N. C. Gellert, F. Christensen, M. Bavdaz, I. Ferreira, M. Collon, G. Vacanti, N. Barrière

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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The BEaTriX (Beam Expander Testing X-ray) facility is now operative at the INAF-Osservatorio Astronomico Brera (Merate, Italy). This facility has been specifically designed and built for the X-ray acceptance tests (PSF and Effective Area) of the ATHENA Silicon Pore Optics (SPO) Mirror Modules (MM). The unique setup creates a parallel, monochromatic, large X-ray beam, that fully illuminates the aperture of the MMs, generating an image at the ATHENA focal length of 12 m. This is made possible by a microfocus X-ray source followed by a chain of optical components (a paraboloidal mirror, 2 channel cut monochromators, and an asymmetric silicon crystal) able to expand the X-ray beam to a 6 cm × 17 cm size with a residual divergence of 1.5 arcsec (vertical) × 2.5 arcsec (horizontal). This paper reports the commissioning of the 4.5 keV beam line, and the first light obtained with a Mirror Module.

Original languageEnglish
Title of host publicationProceedings of SPIE : Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray
EditorsJan-Willem A. den Herder, Shouleh Nikzad, Kazuhiro Nakazawa
Number of pages10
PublisherSPIE - International Society for Optical Engineering
Publication date2022
Article number121810W
ISBN (Electronic)9781510653436
Publication statusPublished - 2022
EventSpace Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray - Montréal, Canada
Duration: 17 Jul 202222 Jul 2022


ConferenceSpace Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray
Internet address
SeriesProceedings of SPIE - The International Society for Optical Engineering


  • Asymmetric diffraction
  • Beam expander
  • BEaTriX
  • Crystals
  • Silicon Pore Optics
  • X-ray microfocus source
  • X-ray testing


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