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Future investigations of astronomical X-ray sources require light weight telescope systems with large collecting areas and good angular resolution. The Wolter I type telescope design offers a suitable possibility for obtaining performant X-ray mirrors with high collecting areas. The technology based on replicated slumped glass optics using thin glasses thereby provides the opportunity to fulfil the light weight and mass production requirements. In NASA's telescope NuSTAR this technology has been proven as advantageous compared to previous systems. Coating thin glasses with iridium, gold or platinum enhances the reflectivity of X-ray mirrors.
Within the project JEUMICO, an acronym for Joint European
Mirror Competence, the Aschaffenburg University of Applied Sciences and the
Czech Technical University in Prague started a collaboration to develop mirrors
for X-ray telescopes. Corresponding mirror segments use substrates of
at
silicon wafers which are coated with thin iridium lms, as this material is
promising high re
ectivity in the X-ray range of interest. The sputtering parameters
are optimized in the context of the expected re
ectivity of the coated
X-ray mirrors. In near future measurements of the assembled mirror modules
optical performances are planned at an X-ray test facility.