Upgrade of a laboratory x-ray diffractometer to extend its operating range towards soft energies

Giacomo Rivolta; Stefano Basso; Marta Civitani; Vincenzo Cotroneo; Thorsten Döhring; Willy-Leopold Michler; Giovanni Pareschi; Daniele Spiga; Manfred Stollenwerk

doi:10.1117/12.2629940

31 August 2022 Upgrade of a laboratory x-ray diffractometer to extend its operating range towards soft energies

Giacomo Rivolta, Stefano Basso, Marta Civitani, Vincenzo Cotroneo, Thorsten Döhring, Willy-Leopold Michler, Giovanni Pareschi, Daniele Spiga, Manfred Stollenwerk

Author Affiliations +

Proceedings Volume 12181, Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray; 121814S (2022) https://doi.org/10.1117/12.2629940
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

The optical properties of x-ray mirror samples are commonly measured using diffractometers based on laboratory sources; like the Bede D1 diffractometer operating at INAF-OAB. This instrument can generate a collimated x-ray beam up to 60 keV, even though the most interesting energy region for x-ray astronomy applications is usually below 10 keV. In the softest part of this range (below 6 keV), high x-ray absorption in air hinders a full and precise characterization of optical components. In this work, we present an upgrade of the Bede D1 diffractometer that extends the operative range of the instrument below 6 keV; this is done by maximizing the flux at lowest energies and by reducing absorption by means of a helium-rich atmosphere. The upgraded instrument will be used for the tests of x-ray mirrors with innovative soft x-ray coatings, with potential application to the next generation x-ray telescopes (such as ATHENA and eXTP).

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Giacomo Rivolta, Stefano Basso, Marta Civitani, Vincenzo Cotroneo, Thorsten Döhring, Willy-Leopold Michler, Giovanni Pareschi, Daniele Spiga, and Manfred Stollenwerk "Upgrade of a laboratory x-ray diffractometer to extend its operating range towards soft energies", Proc. SPIE 12181, Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray, 121814S (31 August 2022); https://doi.org/10.1117/12.2629940

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