TY - CHAP A1 - Döhring, Thorsten A1 - Probst, Anne-Catherine A1 - Zeising, Sebastian T1 - Analyse der Schichtspannungen von Röntgenspiegeln mit einem Weißlichtinterferometer T2 - DGaO-Proceedings N2 - An der Hochschule Aschaffenburg werden iridiumbasierte Schichtsysteme für röntgenastronomische Anwendungen hergestellt. Unter Nutzung eines Weißlichtinterferometers wurde hierfür ein Verfahren zur Vermessung der inhärenten Schichtspannungen entwickelt. Erste vielversprechende Ergebnisse von spannungsarmen Röntgenreflexionsbeschichtungen werden vorgestellt. KW - Röntgenspiegel KW - Interferometer KW - Iridium KW - Schichtspannung Y1 - 2018 UR - https://www.dgao-proceedings.de/download/119/119_p10.pdf SN - 1614-8436 VL - 2018 IS - 2018 SP - P10-1 EP - P10-2 PB - Deutsche Gesellschaft für angewandte Optik e.V. CY - Erlangen ER - TY - JOUR A1 - Döhring, Thorsten A1 - Hudec, Rene ED - Skopal, Augustín T1 - JEUMICO and TRILAMICO: Dimensions of successful Bavarian-Czech cooperation JF - Contributions of the Astronomical Observatory Skalnaté Pleso N2 - In December 2017 the two projects JEUMICO (an acronym for Joint European Mirror Cooperation) and TRILAMICO (standing for Trilateral Mirror Collaboration) are ending. Different aspects of this Bavarian-Czech collaboration between Aschaffenburg University and the Czech Technical University in Prague are discussed. The multiple dimensions of this cooperation are scientific achievements, public relation measures, internationalization of education, financial aspects, inter-cultural communication, and also the actual political situation within Europe. KW - JEUMICO KW - TRILAMICO KW - BTHA KW - Iridium KW - astronomy KW - Röntgenspiegel KW - Spiegelteleskop Y1 - 2018 UR - https://www.astro.sk/caosp/Eedition/Abstracts/2018/Vol_48/No_3/pp430-436_abstract.html VL - 2018 IS - Vol. 48 / 3 SP - 430 EP - 436 ER - TY - JOUR A1 - Stehlikova, Veronika A1 - Probst, Anne-Catherine A1 - Nentvich, Ondrej A1 - Urban, Martin A1 - Sieger, Ladislav A1 - Döhring, Thorsten A1 - Hudec, René ED - Skopal, Augustín T1 - Study of multiple layers coatings for X–ray mirrors JF - Contributions of the Astronomical Observatory Skalnaté Pleso N2 - This paper focuses on a theoretical background that motivated the experimental campaign of multiple layer coatings of X-ray mirrors, and the first results of the testing of the prepared samples. Simulations of the use of different overcoats were performed in order to improve the reflectivity of thin iridium coatings designed for X-ray optics effective in the energy up to 10 keV. Samples based on these simulations were prepared and are being tested for the properties that influence the X-ray optical performance, such as layer homogeneity, density and surface micro-roughness. Further the topic of the coating stress was addressed, as it is an issue in case of thin, lightweight X-ray mirrors and affects the time stability of layers. The discussion and preliminary results conclude our contribution. KW - X-ray KW - optics KW - coating KW - reflectivity KW - iridium KW - Röntgenspiegel KW - Iridium Y1 - 3018 UR - https://www.ta3.sk/caosp/Eedition/Abstracts/2018/Vol_48/No_3/pp488-497_abstract.html VL - 2018 IS - 48 SP - 488 EP - 497 ER - TY - JOUR A1 - Büttner, Andre A1 - Probst, Anne-Catherine A1 - Emmerich, Florian A1 - Damm, Christine A1 - Rellinghaus, Bernd A1 - Döhring, Thorsten A1 - Stollenwerk, Manfred T1 - Influence of Sputtering Pressure on the Microstructure and Layer Properties of Iridium Thin Films JF - Thin Solid Films N2 - Iridium layers with low stress, high density, and low surface roughness find widespread use in different high-technology applications. This paper presents a study of the influence of the sputtering pressure on the properties of iridium thin films and of its effect on the substrate surface microstructure. We analysed the dependence of the microstructure, crystalline structure, electrical resistivity, and deposition rate on the sputtering pressure and surface defects of the substrate. For the latter, plasma etching of the substrate was performed for different processing times and its effect on the surface roughness of substrates and, subsequently, on the grown iridium films, was examined. The sputtering pressure and the substrate plasma etching time both had a strong influence on the microstructure and surface roughness. These microstructural changes are in good agreement with the tendency described in the Thornton Structure-Zone Model for different sputtering pressures and the microstructure phase map of Alvarez. The electrical resistivity, deposition rate, and crystalline structure were highly dependent on the sputtering pressure. KW - Iridium KW - microstructure KW - TEM KW - sputtering KW - thin films KW - Iridium KW - Dünne Schicht Y1 - 2018 UR - https://doi.org/10.1016/j.tsf.2018.06.056 SN - 0040-6090 VL - 2018 IS - 662 SP - 41 EP - 46 ER - TY - GEN A1 - Döhring, Thorsten A1 - Probulla, Theodor A1 - Komzik, Richard A1 - Mann, Michael A1 - Sivanic, Peter A1 - Stollenwerk, Manfred ED - Hambalek, Lubomir T1 - Slovak-Bavarian collaboration on the development of telescope instrumentation N2 - Within the project SLOBATCO (Slovak-Bavarian Telescope Collaboration) the Astronomical Institute of the Slovak Academy of Sciences and Aschaffenburg University of Applied Sciences collaborate in the development and commissioning of the new Ø1.3 m astronomical telescope and the corresponding scientific instrumentation. The project is funded by the Bavarian Academic Center for Central, Eastern and Southeastern Europe (BAYHOST). Technical work packages are targeting filter wheel software for the VIS camera, additional IR filters, and an upgrade of the mirror coating facility by additional sputtering equipment. N2 - Poster KW - telescope KW - astronomy KW - instrumentation KW - Spiegelteleskop Y1 - 2018 UR - https://www.ta3.sk/conferences/75AI2018/posters/AP06.pdf ER - TY - JOUR A1 - Probst, Anne-Catherine A1 - Begou, Thomas A1 - Döhring, Thorsten A1 - Zeising, Sebastian A1 - Stollenwerk, Manfred A1 - Stadtmüller, Johannes A1 - Emmerich, Florian A1 - Lumeau, Julien ED - Publishing OSA, T1 - Coating stress analysis and compensation for iridium-based x-ray mirrors JF - Applied Optics N2 - Iridium-based coatings for mirrors of x-ray telescopes are studied. In particular, stress-induced deformation is characterized and shown to be compressive and equal to −1786  MPa. Two methods for stress compensation are then studied. One relies on the deposition of silica on the back surface of the substrate and a second one relies on the deposition of a chromium sublayer. Advantages and drawbacks of each of these techniques are presented. KW - iridium KW - coating stress KW - X-ray KW - mirror KW - astronomy KW - Röntgenteleskop KW - Iridium KW - Spiegelteleskop Y1 - 2018 UR - https://doi.org/10.1364/AO.57.008775 VL - 2018 IS - 57 (29) SP - 8775 EP - 8779 ER - TY - GEN A1 - Hudec, Rene A1 - Pina, Ladislav A1 - Marsikova, Veronika A1 - Inneman, Adolf A1 - Döhring, Thorsten ED - Deutsche Gesellschaft für angewandte Optik, T1 - Kirkpatrick Baez X-ray Optics for Astrophysics: Recent Status N2 - X-ray optics in KB (Kirkpatrick Baez) arrangement represent promising alternative to Wolter optics in common use. We will present some new results including KB module developed and tested in X-rays within the EU AHEAD project. N2 - Poster KW - X-ray KW - telescope KW - astrophysics KW - Röntgenteleskop Y1 - 2018 UR - https://www.dgao-proceedings.de/download/119/119_p22.pdf SP - 1 EP - 1 ER - TY - GEN A1 - Hudec, Rene A1 - Pina, Ladislav A1 - Marsikova, Veronika A1 - Inneman, Adolf A1 - Döhring, Thorsten ED - Deutsche Gesellschaft für angewandte Optik, T1 - Lobster Eye X-ray Optics for Astrophysics: Recent Status N2 - X-ray optics in LE (Lobster Eye) arrangement represent important part of future X-ray wide field telescopes and monitors. We will present some new results in the design, development, tests and applications of LE X-ray optics with emphasis on astrophysics. N2 - Poster KW - X-ray KW - telescope KW - astrophysics KW - Röntgenteleskop Y1 - 2018 UR - https://www.dgao-proceedings.de/download/119/119_p23.pdf SP - 1 EP - 1 ER - TY - GEN A1 - Döhring, Thorsten A1 - Hudec, Rene T1 - Optics development for X-ray astronomy – a review on four joint Bavarian-Czech projects N2 - In the years 2016 to 2018 the Bavarian-Czech Academic Agency (BTHA) funded in summary four bilateral projects between Aschaffenburg University and CVUT Prague: JEUMICO, TRILAMICO, JODEXRA, and AXROCO. The effective combination of equipment, manpower, and know-how of both partners resulted in the development of stress-compensated iridium coatings for astronomical X-ray mirrors. The findings have been published at scientific conferences and in joint papers. This poster gives a review on the social , political and educational aspects of the collaborations in form of a photo documentation. N2 - Poster KW - X-ray KW - astronomy KW - iridium KW - coating KW - Röntgenspiegel KW - Astronomie Y1 - 2018 SP - 1 EP - 1 ER - TY - CHAP A1 - Döhring, Thorsten A1 - Krauße, Sylvana A1 - Schneider-Störmann, Ludger T1 - Der Studiengang Internationales Technisches Vertriebsmanagement an der Hochschule Aschaffenburg – Ausbildung von Vertriebsingenieuren für einen globalen Markt T2 - Internationalisierung der Curricula in den MINT-Fächern N2 - Die Wettbewerbsfähigkeit der Exportnation Deutschland erfordert hervorragend ausgebildete Vertriebsingenieure. Dieses Ausbildungsziel verfolgt der Studiengang „Internationales Technisches Vertriebsmanagement“ an der Hochschule Aschaffenburg. Als Besonderheit komplettiert ein für alle Studierende verpflichtender Auslandsaufenthalt die international ausgerichtete Ausbildung. Neben Lehrveranstaltungen in englischer Sprache gibt es eine internationale Projektwoche als Maßnahme zur “Internationalisation at Home”. Der Studiengang ist über die „Academic Association of Sales Engineering“ international vernetzt. KW - MINT KW - Vertriebsmanagement KW - Hochschule KW - Aschaffenburg KW - Internationalisierung Y1 - 2018 U6 - https://doi.org/10.3278/6004649w SP - 161 EP - 170 PB - wbv Media CY - Bielefeld ER -