Influence of a carbon over-coat on the X-ray reflectance of XEUS mirrors
In: Optics communications, Jg. 279 (2007), Heft 1, S. 101-105
academicJournal
- print, 14 ref
Zugriff:
We describe measurements of the X-ray reflectance in the range 2-10 keV of samples representative of coated silicon wafers that are proposed for the fabrication of the X-ray evolving universe spectrometer (XEUS) mission. We compare the reflectance of silicon samples coated with bare Pt, with that for samples with an additional 10 nm thick carbon over-coating. We demonstrate a significant improvement in reflectance in the energy range ∼1-4 keV, and at a grazing incidence angle of 10 mrad (0.57°). We consider the resulting effective area that could be attained with an optimized design of the XEUS telescope. Typically an improvement of 10-60% in effective area, depending on photon energy, can be achieved using the carbon overcoat.
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Influence of a carbon over-coat on the X-ray reflectance of XEUS mirrors
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Autor/in / Beteiligte Person: | LUMB, D. H ; CHRISTENSEN, F. E ; JENSEN, C. P ; KRUMREY, M |
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Zeitschrift: | Optics communications, Jg. 279 (2007), Heft 1, S. 101-105 |
Veröffentlichung: | Amsterdam: Elsevier Science, 2007 |
Medientyp: | academicJournal |
Umfang: | print, 14 ref |
ISSN: | 0030-4018 (print) |
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