TY - JOUR A1 - Schmiedeskamp, Bernt A1 - Kloidt, Andreas A1 - Stock, Hans-Jürgen A1 - Kleineberg, Ulf A1 - Döhring, Thorsten A1 - Pröpper, Michael A1 - Rahn, Steffen A1 - Hilgers, Kerstin A1 - Heidemann, Bernhard A1 - Tappe, Thorsten A1 - Heinzmann, Ulrich A1 - Krumrey, Michael K. A1 - Müller, Peter A1 - Scholze, Frank A1 - Heidemann, Klaus F. T1 - Electronbeam-deposited Mo/Si and MoxSiySi multilayer X-ray mirrors and gratings JF - Optical Engineering KW - Röntgenspiegel Y1 - 1994 VL - 33 IS - 4 SP - 1314 EP - 1321 ER - TY - CHAP A1 - Kloidt, Andreas A1 - Stock, Hans-Jürgen A1 - Kleineberg, Ulf A1 - Döhring, Thorsten A1 - Pröpper, Michael A1 - Nolting, Kerstin A1 - Heidemann, Bernhard A1 - Tappe, Thorsten A1 - Schmiedeskamp, Bernt A1 - Heinzmann, Ulrich A1 - Krumrey, Michael K. A1 - Müller, Peter A1 - Scholze, Frank A1 - Rahn, Steffen A1 - Heidemann, Klaus F. T1 - Fabrication, thermal stability, and reflectivity measurements of Mo/Si multilayers as x-ray mirrors and other optical elements T2 - Proceedings of SPIE KW - Röntgenspiegel Y1 - 1992 VL - 1742 SP - 593 EP - 603 ER - TY - CHAP A1 - Döhring, Thorsten A1 - Stollenwerk, Manfred A1 - Stadtmüller, Johannes A1 - Zeising, Sebastian A1 - Flachs, Dennis A1 - Stehlikova, Veronika A1 - Burwitz, Vadim A1 - Krumrey, Michael K. A1 - Cotroneo, Vincenzo A1 - Klementova, Mariana T1 - Characterisation of X-ray mirrors based on chromium-iridium tri-layer coatings T2 - Proceedings of SPIE N2 - 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. KW - iridium KW - mirror KW - X-ray KW - coating KW - telescope KW - Röntgenspiegel KW - Röntgenteleskop KW - Iridium Y1 - 2021 U6 - https://doi.org/https://doi.org/10.1117/12.2592551 VL - 2021 IS - 11776 SP - 1177607-1 EP - 11776076 PB - SPIE ER -