TY - JOUR A1 - Dluhosch, Barbara A1 - Freytag, Andreas A1 - Krüger, Malte T1 - Gains From Trade in a Deficit-Ridden Economy: Note JF - Journal of Institutional and Theoretical Economics (JITE) KW - USA KW - Leistungsbilanzdefizit Y1 - 1998 VL - 154 IS - 4 SP - 680 EP - 687 ER - TY - JOUR A1 - Krüger, Malte T1 - Monetary Policy Implications of Digital Money: A Comment JF - Kyklos KW - Elektronischer Zahlungsverkehr Y1 - 1999 VL - 52 IS - 2 SP - 259 EP - 262 ER - TY - JOUR A1 - Krüger, Malte T1 - Dynamic Hedging in Currency Crisis JF - Economics Letters KW - Zinsänderung KW - Währungskrise Y1 - 1999 VL - 62 IS - 3 SP - 347 EP - 350 ER - TY - JOUR A1 - Krüger, Malte T1 - Offshore e-money issuers and monetary policy JF - First Monday KW - Elektronischer Zahlungsverkehr Y1 - 2001 VL - 6 IS - 10 SP - 1 EP - 1 ER - TY - JOUR A1 - Drehmann, Mathias A1 - Goodhart, Charles A1 - Krüger, Malte A1 - Boldrin, Michele A1 - Rose, Andrew T1 - 10. The challenges facing currency usage: will the traditional transactions medium be able to resist competition from the new technologies? JF - Economic Policy KW - Elektronischer Zahlungsverkehr Y1 - 2002 VL - 17 IS - 34 SP - 193 EP - 227 ER - TY - JOUR A1 - Jost, Thomas T1 - Bei der Euro-Reform werden die Weichen falsch gestellt JF - Börsenzeitung KW - Internationaler Währungsfonds KW - Euro, Währungsunion, ESM Y1 - 2018 VL - 2018 IS - Nr. 229 SP - 6 EP - 6 ER - TY - JOUR A1 - Baal, Sebastian van A1 - Hinrichs, Jens-Werner A1 - Krüger, Malte T1 - Welche Zahlungsverfahren kommen im Internet zum Einsatz? Ein erklärendes Partialmodell und empirische Anzeichen für seine Gültigkeit JF - Banking and Information Technology KW - Elektronischer Zahlungsverkehr Y1 - 2006 VL - 2006 IS - 2 SP - 9 EP - 19 ER - TY - JOUR A1 - Krüger, Malte T1 - The Elasticity Pricing Rule for Two-sided Markets : A Note JF - Review of Network Economics KW - Preisbildung Y1 - 2009 VL - 8 IS - 3 SP - 271 EP - 278 ER - TY - JOUR A1 - Krüger, Malte T1 - Money: A Market Microstructure Approach JF - Journal of Money, Credit and Banking KW - Bargeldloser Zahlungsverkehr Y1 - 2012 SN - 0022-2879 VL - 44 IS - 6 SP - 1245 EP - 1258 ER - TY - JOUR A1 - Krüger, Malte A1 - Judt, Ewald T1 - A European card payments scheme : Forever a phantom? JF - Journal of Payments Strategy & Systems KW - Kartengesteuertes Zahlungssystem Y1 - 2013 SN - 1750-1806 VL - 7 IS - 4 SP - 344 EP - 358 ER - TY - JOUR A1 - Krüger, Malte T1 - Do the Poor Pay for Card Rewards of the Rich? JF - Review of Economics KW - Kartengesteuertes Zahlungssystem Y1 - 2015 SN - 2366-035X VL - 66 IS - 2 SP - 129 EP - 154 ER - TY - JOUR A1 - Krüger, Malte T1 - The introduction of cashless wage payments and the spread of branch banking in post-war Germany JF - Financial History Review KW - Bargeldloser Zahlungsverkehr KW - Lohn Y1 - 2017 VL - 24 IS - 2 SP - 185 EP - 207 ER - TY - JOUR A1 - Krüger, Malte T1 - Ein Drei-Punkte-Plan zur Reform der Geldpolitik JF - Credit and Capital Markets - Kredit und Kapital KW - Geldpolitik Y1 - 2013 SN - 2199-1227 VL - 46 IS - 4 SP - 421 EP - 437 ER - TY - JOUR A1 - Krüger, Malte T1 - Pros and cons of cash : The state of the debate JF - Credit and Capital Markets - Kredit und Kapital KW - Bargeldloser Zahlungsverkehr KW - Bargeld Y1 - 2018 SN - 2199-1227 VL - 51 IS - 1 SP - 15 EP - 40 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 - TY - THES A1 - Bestel, Robert T1 - Simulation neuronaler Aktionspotentiale in Hinblick auf Zellform und Physiologie sowie deren Ableitung mittels extarzellulärer Mikroelektroden KW - Mikroelektrode KW - Nervenzelle Y1 - 2018 U6 - https://doi.org/10.18453/rosdok_id00002390 ER - TY - THES A1 - Hahn, Stefan T1 - Methoden zur nichtlinearen modellbasierten Spurführung benutzerdefinierter Punkte an der Fahrzeugfront KW - Personenkraftwagen KW - Spurführung Y1 - 2017 ER - TY - THES A1 - Amrhein, Sebastian T1 - Wertstoffkreisläufe im Kontext neuer Mobilitätskonzepte KW - Elektrofahrrad KW - Kreislaufwirtschaft KW - Nachhaltigkeit KW - Recycling KW - Ressourcenökonomie Y1 - 2017 UR - https://opus.bibliothek.uni-augsburg.de/opus4/4072 ER - TY - THES A1 - Wölfel, Maximilian T1 - Hochintegriertes hardwaregestütztes Messverfahren zur Untersuchung von fehlerbehafteten Übertragungskanälen in TETRA-Objektfunkversorgungen KW - TETRA, Telekommunikation Y1 - 2018 UR - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:91-diss-20180404-1403407-1-3 ER - TY - THES A1 - Rücker, Johannes T1 - Automatisierte Detektion und Extraktion von Elektroschrott-Komponenten mit Methoden der Bildverarbeitung und des maschinellen Lernens im Hinblick auf Tantal-Recycling KW - Elektronikschrott KW - Recycling Y1 - 2017 UR - http://geb.uni-giessen.de/geb/volltexte/2017/13368/ ER - TY - THES A1 - Lieb, Florian T1 - The Affine Uncertainty Principle, Associated Frames and Applications in Signal Processing KW - Signalverarbeitung KW - Wavelet Y1 - 2018 UR - https://elib.suub.uni-bremen.de/peid=D00106720 ER - TY - BOOK A1 - Dluhosch, Barbara A1 - Freytag, Andreas A1 - Krüger, Malte T1 - Leistungsbilanzsalden und internationale Wettbewerbsfähigkeit KW - Internationale Wettbewerbsfähigkeit KW - Leistungsbilanz KW - Leistungsbilanzdefizit Y1 - 1992 PB - Institut für Wirtschaftspolitik an der Universität Köln CY - Köln ER - TY - BOOK A1 - Dluhosch, Barbara A1 - Freytag, Andreas A1 - Krüger, Malte T1 - International competitiveness and the balance of payments : do current account deficits and surpluses matter? KW - Zahlungsbilanz KW - Internationale Wettbewerbsfähigkeit Y1 - 1996 SN - 1-85898-210-3 PB - Elgar CY - Cheltenham ER - TY - BOOK A1 - Krüger, Malte A1 - Godschalk, Hugo T1 - Herausforderung des bestehenden Geldsystems im Zuge seiner Digitalisierung - Chancen für Innovationen? : Gutachten der PaySys GmbH im Rahmen des Projekts "Technikfolgenabschätzung zu elektronischen Zahlungssystemen für digitale Produkte und Dienstleistungen im Internet" (PEZ) KW - Zahlungsverkehr KW - Digitalisierung Y1 - 1998 PB - FZKA CY - Karlsruhe ER - TY - BOOK A1 - Krüger, Malte A1 - Seitz, Franz T1 - Kosten und Nutzen des Bargelds und unbarer Zahlungsinstrumente : der Nutzen von Bargeld ; Modul 2 KW - Bargeld KW - Elektronischer Zahlungsverkehr Y1 - 2017 PB - Knapp CY - Frankfurt am Main ER - TY - BOOK A1 - Krüger, Malte T1 - Finanzmarktungleichgewichte und Wechselkursvolatilität : zur Bedeutung der internationalen Finanzmärkte für die Entwicklung der Wechselkurse Y1 - 1994 SN - 3-921471-82-6 PB - Institut für Wirtschaftspolitik an der Universität Köln CY - Köln ER - TY - BOOK A1 - Anyu, Li A1 - Krüger, Malte A1 - Micklitz, Hans-Wolfgang A1 - Mingke, He A1 - Musi, Ala A1 - Purnhagen, Kai A1 - Spindler, Gerald A1 - Thorun, Christian ED - Deutsche Gesellschaft für Internationale Zusammenarbeit, ED - Department of Market Regulation, State Administration for Industry and Commerce of the People's Republic of China (SAIC), ED - China Society of Administration for Industry & Commerce (CSAIC), T1 - E-Commerce in China and Germany : a Sino-German comparative analysis KW - Electronic Commerce KW - China KW - Deutschland Y1 - 2012 SN - 978-3-406-63016-3 PB - Beck CY - München ER - TY - BOOK A1 - Krüger, Malte A1 - Seitz, Franz T1 - Kosten und Nutzen des Bargelds und unbarer Zahlungsinstrumente : Übersicht und erste Schätzungen ; Modul 1 KW - Bargeld KW - Elektronischer Zahlungsverkehr Y1 - 2014 PB - Deutsche Bundesbank CY - Frankfurt am Main ER - TY - THES A1 - Goldhammer, Michael T1 - Selbstlernende Algorithmen zur videobasierten Absichtserkennung von Fußgängern KW - Fahrerassistenzsystem KW - Fußgänger Y1 - 2016 U6 - https://doi.org/10.19211/KUP9783737602532 ER - TY - THES A1 - Mayer, Margot T1 - Einfluss ionisierender Strahlung auf die elektrophysiologischen Eigenschaften sich entwickelnder neuronaler Netzwerke KW - Ionisierende Strahlung KW - Neuronales Netz Y1 - 2017 UR - http://nbn-resolving.de/urn:nbn:de:tuda-tuprints-70283 ER - TY - THES A1 - Dressler, Katharina T1 - Bildung von Hohlräumen in lokalen Rückseitenkontakten bei Passivated Emitter and Rear Solarzellen KW - Solarzelle KW - Aluminium KW - Silicium KW - Kontaktieren KW - Hohlraum Y1 - 2016 UR - http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-211482 ER - TY - THES A1 - Rosenberger, Manuel T1 - Polymere planare Bragg-Gitter KW - Bragg-Reflektor KW - Optischer Sensor Y1 - 2018 SN - 978-3-8440-6008-9 PB - Shaker ER - TY - THES A1 - Nick, Christoph T1 - Mikrointegrierte Nanostrukturen mit hohem Aspektverhältnis als neuronale Schnittstelle KW - Neuronales Netz KW - Mikroelektrode Y1 - 2015 UR - http://tuprints.ulb.tu-darmstadt.de/4595/7/Dissertation%20-%20Christoph%20Nick.pdf ER - TY - BOOK A1 - Döhring, Thorsten T1 - Das laserinduzierte Plasma - eine Röntgenlichtquelle N2 - Dissertation KW - Lasererzeugtes Plasma Y1 - 1993 ER - TY - CHAP A1 - Jedamzik, Ralf A1 - Hengst, Joachim A1 - Elsmann, Frank A1 - Lemke, Christian A1 - Döhring, Thorsten A1 - Hartmann, Peter T1 - Optical materials for astronomy from SCHOTT: the quality of large components T2 - Proceedings of SPIE KW - Spiegelteleskop Y1 - 2008 VL - 7018 IS - 70180O ER - TY - JOUR A1 - Döhring, Thorsten T1 - From Heidelberg to Hawaii: SCHOTT’s Century of Astronomy JF - 400 Years of the Telescope Newsletter KW - Spiegelteleskop Y1 - 2008 VL - 1 IS - 9 SP - 2 EP - 7 ER - TY - CHAP A1 - Döhring, Thorsten A1 - Jedamzik, Ralf A1 - Westerhoff, Thomas T1 - Four decades of ZERODUR mirror substrates for astronomy T2 - Proceedings of SPIE KW - Spiegelteleskop KW - Zerodur KW - Glaskeramik Y1 - 2009 VL - 7281 IS - 728103 ER - TY - CHAP A1 - Hartmann, Peter A1 - Nattermann, Kurt A1 - Döhring, Thorsten T1 - ZERODUR® glass ceramics for high stress applications T2 - Proceedings of SPIE KW - Spiegelteleskop KW - Zerodur KW - Glaskeramik Y1 - 2009 VL - 7425 IS - 74250M ER - TY - CHAP A1 - Döhring, Thorsten A1 - Hartmann, Peter A1 - Lentes, Frank-Thomas T1 - Heritage of ZERODUR® glass ceramic for space applications T2 - Proceedings of SPIE KW - Spiegelteleskop KW - Zerodur KW - Glaskeramik Y1 - 2009 VL - 7425 IS - 74250L ER - TY - CHAP A1 - Jedamzik, Ralf A1 - Döhring, Thorsten A1 - Johannsson, Thoralf T1 - CTE characterization of ZERODUR® for the ELT century T2 - Proceedings of SPIE KW - Spiegelteleskop KW - Zerodur KW - Glaskeramik Y1 - 2009 VL - 7425 IS - 742504 ER - TY - JOUR A1 - Döhring, Thorsten A1 - Schreiber, Ulrich T1 - Glass ceramics – foundation for highest precision JF - Photonik international KW - Glaskeramik Y1 - 2009 VL - 2009 IS - 1 SP - 17 EP - 19 ER - TY - CHAP A1 - Kling, Günther A1 - Lucarelli, Stefano A1 - Hartmann, Peter A1 - Nattermann, Kurt A1 - Döhring, Thorsten A1 - Kuhr, Markus A1 - Thomas, Peter T1 - Double Ring Tests on ZERODUR K20 and Etched ZERODUR T2 - Proceedings 11th European Conference on Spacecraft Structures, Materials and Mechanical Testing, 15-17 Sep 2009, Toulouse, France KW - Spiegelteleskop KW - Zerodur KW - Glaskeramik Y1 - 2009 ER - TY - GEN A1 - Hartmann, Peter A1 - Döhring, Thorsten A1 - Schäfer, Martin T1 - Glass Ceramic ZERODUR® for Space Application T2 - DGaO-Proceedings N2 - Poster KW - Spiegelteleskop KW - Zerodur KW - Glaskeramik Y1 - 2009 SN - 1614-8436 VL - 2009 ER - TY - CHAP A1 - Haak, Valentin A1 - Abke, Jörg A1 - Borgeest, Kai T1 - Conception of a LEGO Mindstorms EV3 Simulation for Programming in C in computer science courses T2 - 2018 IEEE Global Engineering Education Conference (EDUCON) KW - LEGO MindStorms Y1 - 2018 U6 - https://doi.org/10.1109/EDUCON.2018.8363269 SN - 2165-9567 SP - 478 EP - 483 PB - IEEE 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 - 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 - 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 - 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 - Lieb, Florian A1 - Stark, Hans-Georg T1 - Audio inpainting: Evaluation of time-frequency representations and structured sparsity approaches JF - Signal Processing N2 - Audio signals such as music are known to exhibit distinct and sparse time-frequency patterns. In particular, the short-time Fourier/Gabor transform is widely used for sparsely representing audio signals. In this contribution, such sparsity patterns are exploited to reconstruct missing samples. The quality of reconstruction is evaluated for various kinds of proximal splitting algorithms, time-frequency discretizations and sparsity enforcing constraints. Furthermore, given a time-frequency representation, we investigate the performance of synthesis vs. analysis approaches to the reconstruction problem. The equidistant discretization scheme of Gabor transforms is non-adaptive. It is plausible, that more flexible time-frequency representations like wavelets or ERBlets improve reconstruction of missing audio samples. The numerical results presented in this contribution confirm this conjecture and lead to good reconstruction results even for gaps of contiguously missing samples, whose size is notably larger than reported for inpainting experiments carried out previously. KW - Audio inpainting, Structured sparsity, Proximal splitting, Synthesis/analysis, Non-stationary Gabor frames KW - Zeit-Frequenz-Darstellung KW - Tonsignal Y1 - 2018 UR - https://doi.org/10.1016/j.sigpro.2018.07.012 VL - 2018 IS - 153 SP - 291 EP - 299 ER - TY - JOUR A1 - Probst, Anne-Catherine A1 - Stollenwerk, Manfred A1 - Emmerich, Florian A1 - Büttner, Andre A1 - Zeising, Sebastian A1 - Stadtmüller, Johannes A1 - Riethmüller, Franziska A1 - Stehlikova, Veronika A1 - Mingwu, Wen A1 - Proserpio, Laura A1 - Damm, Christine A1 - Rellinghaus, Bernd A1 - Döhring, Thorsten T1 - Influence of sputtering pressure on the nanostructure and the X-ray reflectivity of iridium coatings JF - Surface and Coatings Technology N2 - Reflective mirror coatings made of iridium are used in X-ray telescopes of the Chandra X-ray Observatory (CXO) launched in 1999 by the National Aeronautics and Space Administration (NASA) to investigate astronomical sources at photon energies below 10. keV. These coatings were produced in a DC magnetron sputtering process and have so far proven their suitability for space-based applications. We are considering in the present paper the processing of thin iridium films for lightweight telescopes using the radio frequency magnetron sputtering technique with an oblique angle deposition. The coating development presented here is focused on the influence of total sputtering pressure on film properties as well as on its impact on the mirror's performance. Characterisation methods such as X-ray diffractometry, X-ray reflectometry, atomic force microscopy and transmission electron microscopy have been used. Correlations between morphology, density, surface micro-roughness, crystal structure of the iridium layer and the expected reflectivity of the X-ray mirror are described and discussed. KW - Iridium KW - sputtering KW - microstructure KW - coating KW - X-ray KW - Iridium KW - Röntgenteleskop Y1 - 2017 UR - https://doi.org/10.1016/j.surfcoat.2017.10.062 SN - 0257-8972 VL - 2017 IS - 343 SP - 101 EP - 107 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 - 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 -