Innovative overcoatings for soft X-ray reflectivity enhancement
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Vincenzo Cotroneo1
- Giacomo Rivolta1
- Marcos Bavdaz2
- Ricardo Bruni3
- Marta Maria Civitani1
- Thorsten Döhring4
- Ivo Ferreira2
- Eugenio Gibertini5
- Angelo Giglia6
- Christian Gollwitzer4
- Simone Iovenitti1
- Michael Krumney4
- Luca Magagnin5
- Nicola Mahne6
- Stefano Nannarone6
- Giovanni Pareschi1
- Suzanne Romaine3
- Leandra Sethares3
- Brian Shortt4
- Dieter Skroblin4
- Giorgia Sironi1
- Daniele Spiga1
- Gianpiero Tagliaferri1
- Giuseppe Valsecchi7
- 1. INAF - Osservatorio Astronomico di Brera
- 2. ESTEC, ESA
- 3. Center for Astrophysics, Harvard & Smithsonian
- 4. Physikalisch-Technische Bundesanstalt
- 5. Politecnico di Milano
- 6. IOM, CNR
- 7. Media Lario Srl
Description
“Dip-coatings” are a completely new technology for depositing a carbon-based overcoating on the reflecting surface of X-ray mirrors. This simple deposition process is controllable and repeatable, as well as scalable and inexpensive, and can be carried out without the requirement for specialistic equipment or trained personnel.
We have considered the use of these coatings on different materials, in particular Ir monolayers and Ir/Cr bilayers, which can be convenient coatings for ATHENA mirrors. We measured the X-ray reflectivity of tens of samples in three different beamlines (one laboratory source and two synchrotron radiation facilities), covering a broad range of angular and energetic ranges. Results are in excellent agreement with the model and show that the technology has a good potential for application to X-ray optics and telescopes.
More details can be found in the reference paper.
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Additional details
References
- Cotroneo et al. (2022), "Dopamine dip-liquid overcoatings for soft x-ray reflectivity enhancement," Proc. SPIE 12181, Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray, 1218117, https://doi.org/10.1117/12.2630212