Dopamine dip-liquid overcoatings for soft x-ray reflectivity enhancement

Vincenzo Cotroneo; Giacomo Rivolta; Marcos Bavdaz; Ricardo Bruni; Marta M. Civitani; Thorsten Döhring; Ivo Ferreira; Eugenio Gibertini; Angelo Giglia; Christian Gollwitzer; Simone Iovenitti; Michael Krumney; Luca Magagnin; Nicola Mahne; Stefano Nannarone; Giovanni Pareschi; Suzanne Romaine; Leandra Sethares; Brian Shortt; Dieter Skroblin; Giorgia Sironi; Daniele Spiga; Gianpiero Tagliaferri; Giuseppe Valsecchi

doi:10.1117/12.2630212

31 August 2022 Dopamine dip-liquid overcoatings for soft x-ray reflectivity enhancement

Vincenzo Cotroneo, Giacomo Rivolta, Marcos Bavdaz, Ricardo Bruni, Marta M. Civitani, Thorsten Döhring, Ivo Ferreira, Eugenio Gibertini, Angelo Giglia, Christian Gollwitzer, Simone Iovenitti, Michael Krumney, Luca Magagnin, Nicola Mahne, Stefano Nannarone, Giovanni Pareschi, Suzanne Romaine, Leandra Sethares, Brian Shortt, Dieter Skroblin, Giorgia Sironi, Daniele Spiga, Gianpiero Tagliaferri, Giuseppe Valsecchi

Author Affiliations +

Proceedings Volume 12181, Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray; 1218117 (2022) https://doi.org/10.1117/12.2630212
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Abstract

It has been known for some time that sputtered low-density coatings deposited under vacuum (e.g. carbon or B4C), applied on top of high-density metallic coatings, can enhance the reflectivity in the soft x-ray band (below ~5 keV). In the last years, we experimented with novel carbonated coatings obtained by dip-liquid deposition, in which a thin film is formed on the surface of a mirror by immersion in a suitable precursor solution. After several attempts with different chemical compounds, we found an optimal candidate both for the reflectivity performance and for the convenience of the deposition process, which is much simpler and inexpensive compared to conventional processes. In particular, such coatings can enhance the soft x-ray response at the reflection angles employed in future telescopes, like ATHENA (ESA), Lynx (NASA) and eXTP (CAS). In this paper we consider the application of dip-liquid overcoatings on conventional coatings (Au, Ir) or in combination with recently proposed chromium overcoatings and their possible uses to enhance the reflectivity of x-ray mirrors at low, medium or higher energies, presenting the first experimental results of x-ray tests on these coatings.

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Vincenzo Cotroneo, Giacomo Rivolta, Marcos Bavdaz, Ricardo Bruni, Marta M. Civitani, Thorsten Döhring, Ivo Ferreira, Eugenio Gibertini, Angelo Giglia, Christian Gollwitzer, Simone Iovenitti, Michael Krumney, Luca Magagnin, Nicola Mahne, Stefano Nannarone, Giovanni Pareschi, Suzanne Romaine, Leandra Sethares, Brian Shortt, Dieter Skroblin, Giorgia Sironi, Daniele Spiga, Gianpiero Tagliaferri, and Giuseppe Valsecchi "Dopamine dip-liquid overcoatings for soft x-ray reflectivity enhancement", Proc. SPIE 12181, Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray, 1218117 (31 August 2022); https://doi.org/10.1117/12.2630212

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