| Zugriffsnummer | 45888 |
| Dokumenttyp | Konferenzartikel |
| Peer Review | mit Peer Review |
| Sprache | Englisch |
| Titel | Characterisation of X-ray mirrors based on chromium-iridium tri-layer coatings |
| Autor(in); Institution |
Döhring, Thorsten; TH Aschaffenburg UAS, Aschaffenburg, GERMANY
Stollenwerk, Manfred; TH Aschaffenburg UAS, Aschaffenburg, GERMANY
Stadtmüller, Johannes; TH Aschaffenburg UAS, Aschaffenburg, GERMANY
Zeising, Sebastian; TH Aschaffenburg UAS, Aschaffenburg, GERMANY
Flachs, Dennis; TH Aschaffenburg UAS, Aschaffenburg, GERMANY
Stehlikova, Veronika; Max Planck Institute for Extraterrestrial Physics, Garching, GERMANY
Burwitz, Vadim; Max Planck Institute for Extraterrestrial Physics, Garching, GERMANY
Krumrey, Michael; 7.2, Röntgenmesstechnik mit Synchrotronstrahlung, PTB-Berlin
Cotroneo, Vincenzo; INAF-Osservatorio Astronomico di Brera, Merate, ITALY
Klementova, Mariana; Czech Academy of Sciences, Prague, CZECH REPUBLIC
|
| Quelle/Jahr | EUV and X-ray Optics, Sources, and Instrumentation:(2021), 1177607-1 - 1177607-8 |
| Schriftenreihe | Proceedings of SPIE: 11776 |
| Availability | [online only] |
| Herausgeber(in) |
Hudec, René
Pina, Ladislav
Tschentscher, Thomas
|
| ISSN | 0277-786X (PRINT) ; 1996-756X (ONLINE) |
| DOI | |
| Verlag | Bellingham, Wash.: SPIE |
| Konferenzangaben | SPIE Optics + Optoelectronics 2021, Virtual Conference, 19-22, April, 2021 |
| Freie Schlagworte | iridium ; coating ; chromium ; X-rays ; mirror ; reflectivity |
| Zusammenfassung | Iridium-based layer systems are highly effective mirror coatings for space-born X-ray telescopes. During the recent years, Aschaffenburg University of Applied Sciences and its partners developed stress compensated chromium-iridium coatings for such astronomical applications, using chromium as an adhesive layer between iridium reflective layer and mirror substrate. However, there was room for improvement: To overcome the disturbing reflectivity reduction of the iridium absorption edge around 2 keV photon energy, thin overcoat layers of chromium are applied in addition now. This layer system has been analyzed by atomic force microscopy and transmission electron microscopy images. Furthermore, the reflectivity of such innovative X-ray mirrors based on chromium-iridium tri-layer coatings was recently measured at PTB's four-crystal monochromator beamline at the synchrotron radiation facility BESSY II. The experimental results, obtained for photon energies between 1.9 keV and 11 keV at two grazing incidence angles (0.6 degree and 0.9 degree) and their comparison with corresponding simulations are presented in this contribution. When compared to simulations of pure iridium coatings, a significantly higher reflectivity was achieved especially in the soft X-ray regime between 2 keV and 4 keV. Such chromium-iridium tri-layer coatings have high potential to increase the effective area for X-ray telescopes in Lobster Eye Design, for Wolter-I type X-ray optics, and for silicon pore optics as considered for the ATHENA telescope of the European Space Agency. |
| Themenbereich der Metrologie | Photometrie und Radiometrie |
Zitierung
Döhring, T., Stollenwerk, M., Stadtmüller, J., Zeising, S., Flachs, D., Stehlikova, V., Burwitz, V., Krumrey, M., Cotroneo, V., & Klementova, M. (2021). Characterisation of X-ray mirrors based on chromium-iridium tri-layer coatings. SPIE Optics + Optoelectronics 2021, Virtual Conference, 19-22, April, 2021. https://doi.org/10.1117/12.2592551