TY - CHAP A1 - Rivolta, Giacomo A1 - Basso, Stefano A1 - Civitani, Marta Maria A1 - Cotroneo, Vincenzo A1 - Döhring, Thorsten A1 - Michler, Willy-Leopold A1 - Pareschi, Giovanni A1 - Spiga, Daniele A1 - Stollenwerk, Manfred T1 - Upgrade of a laboratory X-ray diffractometer to extend its operating range towards soft energies T2 - Proceedings of SPIE N2 - The optical properties of X-ray mirror samples are commonly measured using diffractometers based on laboratory sources; like the Bede D1 diffractometer operating at INAF-OAB. This instrument can generate a collimated X-ray beam up to 60 keV, even though the most interesting energy region for x-ray astronomy applications is usually below 10 keV. In the softest part of this range (below 6 keV), high X-ray absorption in air hinders a full and precise characterization of optical components. In this work, we present an upgrade of the Bede D1 diffractometer that extends the operative range of the instrument below 6 keV; this is done by maximizing the flux at lowest energies and by reducing absorption by means of a helium-rich atmosphere. The upgraded instrument will be used for the tests of X-ray mirrors with innovative soft X-ray coatings, with potential application to the next generation X-ray telescopes (such as ATHENA and eXTP). KW - X-ray KW - mirror KW - reflectivity KW - refractometer KW - ATHENA KW - Röntgenspiegel KW - Diffraktometer Y1 - 2022 UR - https://www.spiedigitallibrary.org/conference-proceedings-of-spie/12181/121814S/Upgrade-of-a-laboratory-x-ray-diffractometer-to-extend-its/10.1117/12.2629940.short U6 - https://doi.org/doi: 10.1117/12.2629940 SN - 0277-786X VL - 2022 IS - 12181 SP - 121814S-1 EP - 121814s-7 PB - SPIE ER - TY - CHAP A1 - Stanik, Eva A1 - Pregler, Jan A1 - Döhring, Thorsten A1 - Kätker, Anna A1 - Busch, Uwe A1 - Friedrich, Peter ED - Hudec, René ED - Pina, Ladislav T1 - A visitor experiment on astronomical x-ray optics for the “Deutsches Röntgenmuseum” T2 - EUV and X-ray Optics: Synergy between Laboratory and Space IX N2 - The “Deutsches Röntgen-Museum” in Remscheid (Germany) is the unique institution worldwide that researches and documents the life and work of the first Nobel Prize winner in physics, Wilhelm Conrad Röntgen, and the effects of his discovery of X-rays. As an integral part of the museum, the RöLab laboratory offers visitors the opportunity to gain practical experience in X-rays, optics and technology through own experiments. As part of a joint development project, students from Aschaffenburg University of Applied Sciences are currently designing a visitor experiment on astronomical X-ray optics for the museum´s Röntgen laboratory. An optical set-up with visible light illustrates the focusing principle of X-ray telescopes, e. g. for wide-angle optics based on the lobster-eye principle. Display boards explain the optics of various types of telescopes with accompanying text and corresponding illustrations. Modern X-ray observatories such as CHANDRA, XMM-Newton and eROSITA are presented clearly. Once implemented, the new visitor experiment inside the “Deutsches Röntgen-Museum” aims to inspire young researchers with enthusiasm for the fascinating world of X-ray optics and X-ray astronomy. KW - X-ray KW - astronomy KW - STEM KW - museum KW - Röntgen KW - Deutsches Röntgen-Museum KW - Röntgenoptik Y1 - 2025 U6 - https://doi.org/10.1117/12.3056291 VL - 2025 IS - 13531 SP - 135310M-1 EP - 135310M-7 PB - SPIE ER - TY - CHAP A1 - Hudec, Rene A1 - Stieglitz, Veronika A1 - Döhring, Thorsten A1 - Friedrich, Peter A1 - Burwitz, Vadim T1 - Novel X-ray optics developed within the AHEAD2020 project N2 - We present a summary of our contribution to the EU Horizon 2020 project AHEAD2020, with emphasis on the X-ray optics work package. The Czech Technical University – together with other collaborating institutes - studied innovative Lobster Eye (LE) and Kirkpatrick-Baez (KB) X-ray modules, based on the Multi Foil Optics technology (MFO). In addition, two major events were organized, namely a students workshop in December 2023 and a summer school in May 2024. The KB optics represents a promising and cost effective alternative to the currently used Wolter I telescopes. The LE X-ray optics, based on the Schmidt design, has a wide field of view (FOV) with a short focal length, making it suitable for CubeSat application. Thereby the 2D LE optics consist of two orthogonal sub-modules of flat smooth reflecting foils, each sub-modules focuses in one direction. The advantage of such optics is that it preserves the angular resolution throughout the FOV even for off-axis points, as demonstrated by simulations and measurements. There was a collaboration with Aschaffenburg University in design, development, and testing of the double LE module HORUS, comparing different reflecting coatings. KW - Horizon2020 KW - astronomy KW - telescope KW - X-ray KW - Röntgenoptik KW - Beschichtung Y1 - 2025 UR - https://www.dgao-proceedings.de/abstract/abstract_only.php?id=3236 SP - 1 EP - 1 PB - DGaO ER - TY - JOUR A1 - Kroneberger, Monika A1 - Stanik, Eva A1 - Döhring, Thorsten ED - El Gawhary, O. ED - Witte, S. ED - Moreno, I. T1 - Parameter optimization for the infrared curing process of powder coatings using the NAPUBEST prototype and optical simulations JF - EPJ Web of Conferences N2 - In line with the energy transition, it is desirable to replace fossil fuels in the curing process of industrial powder coatings. Infrared heating is the considered method here. IR-emitter arrangement in the reflective heating chamber, their geometry and the dwell time of the components are crucial for a successful and efficient process. Process optimization has to consider the optical parameter variation of the powder coating during the procedure. Measurements in the NAPUBEST prototype are compared with optical simulations of the setup to get the simulation parameters in agreement with reality and to provide a foundation for the layout of industrial processes. KW - infrared KW - powder coating KW - sustainability KW - optic design KW - curing KW - Pulverlack KW - Aushärtung KW - Infrarot Y1 - 2025 U6 - https://doi.org/https://doi.org/10.1051/epjconf/202533503035 SN - 2100-014X VL - 335 SP - 1 EP - 2 PB - EDP Sciences ER - TY - CHAP A1 - Hudec, Rene A1 - Stieglitz, Veronika A1 - Döhring, Thorsten A1 - Friedrich, Peter A1 - Burwitz, Vadim T1 - Novel X-ray optics developed within the AHEAD2020 project T2 - DGaO-Proceedings N2 - We present a summary of our contribution to the EU Horizon 2020 project AHEAD2020, with emphasis on the X-ray optics work package. The Czech Technical University – together with other collaborating institutes – studied innovative Lobster Eye and Kirkpatrick-Baez X-ray modules, based on the Multi Foil Optics technology. In addition, a student’s workshop in December 2023 and a summer school in May 2024 were organized within the project. KW - X-ray KW - optics KW - telescope KW - Lobster Eye KW - mirror KW - Röntgenoptik Y1 - 2025 UR - https://www.dgao-proceedings.de/download/126/126_p5.pdf SN - 1614-8436 VL - 2025 IS - 126 SP - 1 EP - 2 PB - DGaO ER - TY - GEN A1 - Döhring, Thorsten A1 - Pregler, Jan A1 - Krivanekova, Lucia A1 - Hildenbrand, Georg T1 - Strahlungsmessungen beim Erstflug des Stratosphärenballon-Experiments ASTRABAX T2 - DGaO-Proceedings N2 - Mit dem Aschaffenburger Stratosphären-Ballon-Experiment („ASTRABAX“) werden Experimente zu Material- und Biowissenschaften unter extremer Strahlungsexposition in großer Höhe durchgeführt. Der erste von drei geplanten Ballonflügen startete Mitte Oktober 2024 im norddeutschen Bad Pyrmont und erreichte eine Flughöhe von fast 35 km. Der Schwerpunkt der physikalischen Experimente lag auf der Vermessung des UV-C-Spektralbereichs mit einem Miniatur-UV-VIS-Spektrometer und der Strahlungsdosimetrie mit einem Geigerzähler. In einem zweiten Satz von Experimenten wurde die Wirkung der Bestrahlung auf Polydopaminproben untersucht, welche derzeit für Beschichtungen von astronomischen Röntgenspiegel entwickelt werden. Die Ballongondel enthielt auch Proben biologischer Zellen, die hier gleichzeitig einer niedrig dosierten Strahlung von hochenergetischen Partikeln, Gammastrahlen und UV-Strahlung ausgesetzt wurden. Experimente unter solchen natürlichen stratosphärischen Bedingungen sind für atmosphärische Höhenflüge, bemannte Raumfahrtmissionen, vergleichbare Expositionen bei anderen Objekten des Sonnensystems und die strahlenbiologische Forschung von Bedeutung. N2 - Poster KW - Stratosphärenballon KW - kosmische Strahlung KW - ultraviolette Strahlung KW - Spektrometer KW - Stratosphären-Ballon KW - Kosmische Strahlung KW - Röntgenspiegel Y1 - 2024 UR - https://www.dgao-proceedings.de/abstract/abstract_only.php?id=3181 VL - 2025 IS - 126 SP - 1 EP - 2 PB - DGaO ER - TY - CHAP A1 - Stanik, Eva A1 - Pregler, Jan A1 - Döhring, Thorsten A1 - Kätker, Anna A1 - Busch, Uwe A1 - Friedrich, Peter T1 - A visitor experiment on astronomical X-ray optics for the “Deutsches Röntgen Museum” T2 - Proceedings of SPIE N2 - The "Deutsches Röntgen Museum” in Remscheid is the unique institution worldwide that researches and documents the life and work of the first Nobel Prize winner in physics, Wilhelm Conrad Röntgen and the effects of his discovery of X rays. As an integral part of the museum, the RöLab laboratory offers visitors the opportunity to gain practical experience in X rays, optics and technology through own experiments. As part of a joint development project, students from Aschaffenburg University of Applied Sciences are currently designing a visitor experiment on astronomical X ray optics for the museum laboratory. N2 - Poster KW - X-ray KW - astronomy KW - STEM KW - education KW - museum KW - Deutsches Röntgen-Museum KW - Röntgenoptik KW - Experiment Y1 - 2025 UR - https://spie.org/optics-optoelectronics/presentation/A-visitor-experiment-on-astronomical-x-ray-optics-for-the/13531-20 VL - 2025 IS - 13531 SP - 1 EP - 1 PB - SPIE ER - TY - CHAP A1 - Kroneberger, Monika A1 - Stanik, Eva A1 - Döhring, Thorsten T1 - Optik-Simulation für die Energiewende am Beispiel eines industriellen Infrarot-Heizofens T2 - DGaO-Proceedings N2 - Um fossile Brennstoffe in der industriellen Pulverlackbeschichtung zu ersetzen, kann Infrarottrocknung eingesetzt werden. Für komplexe Geometrien, bei denen eine Verschattung die Effizienz der Infrarot-Aushärtung mindert, sind die Anordnung der Infrarotstrahler in der reflektierenden Heizkammer, deren Geometrie und die Verweilzeit der Bauteile die Schlüssel für erfolgreiche Prozesse. KW - Infrarotstrahlung KW - Pulverlack KW - Heizofen KW - Optik-Simulation Y1 - 2025 UR - https://www.dgao-proceedings.de/download/126/126_p23.pdf SN - 1614-8436 VL - 2025 IS - 126 SP - 1 EP - 2 PB - DGaO ER - TY - CHAP A1 - Döhring, Thorsten A1 - Pregler, Jan A1 - Krivanekova, Lucia A1 - Hildenbrand, Georg T1 - Strahlungsmessungen beim Erstflug des Stratosphärenballon-Experiments ASTRABAX T2 - DGaO-Proceedings N2 - Der erste von drei geplanten Ballonflügen beim Aschaffenburger Stratosphären- Ballon-Experiment („ASTRABAX“) startete im Oktober 2024 in Bad Pyrmont und erreichte eine Flughöhe von fast 35 km. Der Schwerpunkt der physikalischen Experimente lag auf der Vermessung des UV-C-Spektralbereichs mit einem Miniatur-Spektrometer und der Strahlungsdosimetrie mit einem Geigerzähler. KW - Stratosphärenballon KW - kosmische Strahlung KW - Ultraviolet KW - Atmosphäre Y1 - 2025 UR - https://www.dgao-proceedings.de/download/126/126_p6.pdf SN - 1614-8436 VL - 2025 IS - 126 SP - 1 EP - 2 PB - DGaO ER - TY - CHAP A1 - Stanik, Eva A1 - Döhring, Thorsten A1 - Rees, Paul A1 - Kroneberger, Monika A1 - Stanik, Martin T1 - Infrared heating for a sustainable powder coating technology T2 - DGaO-Proceedings N2 - Industrial processes need to be transformed into sustainable alternatives. For powder coatings, which traditionally rely on gas or oil heating systems, infrared radiation can deliver the required process heat. The aim of the NAPUBEST project is to evaluate the possibilities of infrared radiation in the powder coating process. In our laboratory, we realized a prototype of an IR oven for test measurements. KW - infrared KW - powder coating KW - sustainability KW - curing Y1 - 2025 UR - https://www.dgao-proceedings.de/download/126/126_p24.pdf SN - 1614-8436 VL - 2025 IS - 126 SP - 1 EP - 2 PB - DGaO ER -