@article{DoehringStanikZeisingetal.2025, author = {D{\"o}hring, Thorsten and Stanik, Eva and Zeising, Sebastian and Meissner, Martin}, title = {Astronomy events at Aschaffenburg University to attract future students}, series = {Acta Polytecnica}, volume = {2025}, journal = {Acta Polytecnica}, number = {65 (1)}, pages = {1 -- 6}, year = {2025}, abstract = {In 2023, the German Federal Ministry of Education and Research and the German organisation for science communication "Wissenschaft im Dialog" jointly proclaimed a "Science Year 2023" in Germany with the motto "Our Universe". One of the numerous events that have been supported has been that of the project "Zirkus UNI-versum", which took place in summer 2023 at Aschaffenburg University of Applied Sciences. This project, and other activities for schools, intend to stimulate the interest of pupils in STEM subjects and to attract future engineering students.}, subject = {Astronomie}, language = {en} } @inproceedings{DoehringStanikPregleretal.2025, author = {D{\"o}hring, Thorsten and Stanik, Eva and Pregler, Jan and K{\"a}tker, Anna and Busch, Uwe and Friedrich, Peter}, title = {Konzeption eines Astronomie-Besucherexperiments f{\"u}r das Deutsche R{\"o}ntgen Museum}, series = {Bayerischer Tag f{\"u}r gute Lehre}, volume = {2025}, booktitle = {Bayerischer Tag f{\"u}r gute Lehre}, publisher = {Universit{\"a}t W{\"u}rzburg}, organization = {Technische Hochschule Aschaffenburg}, pages = {1 -- 1}, year = {2025}, abstract = {Das Deutsche R{\"o}ntgen Museum in Remscheid ist eine weltweit einzigartige Institution, die das Leben und Werk des ersten Physik Nobelpreistr{\"a}gers Wilhelm Conrad R{\"o}ntgen und die Auswirkungen seiner Entdeckung der R{\"o}ntgenstrahlung erforscht und dokumentiert Als integraler Bestandteil des Museums bietet das Museumslabor R{\"o}Lab die M{\"o}glichkeit, durch eigene Experimente praktische Erfahrungen zu verschiedenen Themen rund um R{\"o}ntgenstrahlung, Optik und Technik zu sammeln Im Rahmen eines gemeinsamen Entwicklungsprojekts konzipieren Studierende der TH Aschaffenburg derzeit ein Besucherexperiment zur astronomischen R{\"o}ntgenoptik f{\"u}r das Museumslabor Das neue Besucherexperiment soll nach seiner Realisierung junge Forscherinnen und Forscher f{\"u}r die faszinierende Welt der R{\"o}ntgenoptik und der R{\"o}ntgenastronomie begeistern.}, subject = {Deutsches R{\"o}ntgen-Museum}, language = {de} } @inproceedings{DoehringKriegerStanik2025, author = {D{\"o}hring, Thorsten and Krieger, Jochen and Stanik, Eva}, title = {Praxisschock im Studium - die Erstellung komplexer Angebote f{\"u}r Satellitenkomponenten}, series = {Bayerischer Tag f{\"u}r gute Lehre}, volume = {2025}, booktitle = {Bayerischer Tag f{\"u}r gute Lehre}, publisher = {Universit{\"a}t W{\"u}rzburg}, organization = {Technische Hochschule Aschaffenburg}, pages = {1 -- 1}, year = {2025}, abstract = {Die Lehrveranstaltung „Projektstudie" im Rahmen des Studiengangs "Internationales Technisches Vertriebsmanagement" verbindet Elemente der Ingenieurwissenschaften und der Betriebswirtschaftslehre mit einem realistischen Vertriebsprojekt, hier der Erstellung eines komplexen Angebotes f{\"u}r Satellitenkomponenten. Begleitend zu der Teamarbeit am praktischen Vertriebsprojekt werden Lehrsequenzen theoretischer Natur durchgef{\"u}hrt, die dem nachhaltigen Verst{\"a}ndnis dienen und auf die Schwerpunktthemen vorbereiten. Die hohe Qualit{\"a}t der erstellten Angebotsunterlagen zeigt, dass die angestrebten Lernziele erreicht wurden. Der Praxisschock einer komplexen Angebotserstellung erfolgt f{\"u}r die Studierenden somit bereits im Studium unter Anleitung eines auf diesem Gebiet berufserfahrenen Professors und nicht erst w{\"a}hrend der Probezeit in einer ersten Vertriebsposition.}, subject = {Investitionsg{\"u}termarketing}, language = {de} } @inproceedings{StanikDoehringKrivanekovaetal.2025, author = {Stanik, Eva and D{\"o}hring, Thorsten and Krivanekova, Lucia and Meißner, Martin}, title = {„Zirkus UNI-versum" - ein Astronomie-Event f{\"u}r Schulklassen}, series = {Bayerischer Tag f{\"u}r gute Lehre}, volume = {2025}, booktitle = {Bayerischer Tag f{\"u}r gute Lehre}, publisher = {Universit{\"a}t W{\"u}rzburg}, organization = {Techniche Hochschule Aschaffenburg}, pages = {1 -- 1}, year = {2025}, abstract = {Im "Wissenschaftsjahr 2023 - Unser Universum", einer gemeinsamen Initiative des Bundesministeriums f{\"u}r Bildung und Forschung (BMBF) und Wissenschaft im Dialog (WiD), wurden zahlreiche Projekte in ganz Deutschland gef{\"o}rdert. Eines dieser Projekte war der "Zirkus UNI-versum", der an der Technischen Hochschule Aschaffenburg stattfand. Zielgruppe waren Schulklassen von benachbarten Schulen, die eingeladen wurden, bei einem Besuch auf dem Hochschul-Campus spielerisch Wissen {\"u}ber Astronomie und Raumfahrt zu sammeln. Gleichzeitig sollen mit dem Projekt (und anderen „Erlebnis-Bausteinen" unserer Schulprojekte) die Sch{\"u}lerinnen und Sch{\"u}ler f{\"u}r MINT-F{\"a}cher begeistert und zuk{\"u}nftige Studierende f{\"u}r technische Studieng{\"a}nge gewonnen werden.}, subject = {Astronomie}, language = {de} } @incollection{KhropostRiethmuellerStaniketal.2025, author = {Khropost, Diana and Riethm{\"u}ller, Franziska and Stanik, Eva and D{\"o}hring, Thorsten and Hertwig, Andreas and Huelague, Deniz}, title = {Polydopamine - a bionic material and its potential applications for batteries}, series = {MaterialsWeek 2025 - Book of Abstracts}, booktitle = {MaterialsWeek 2025 - Book of Abstracts}, publisher = {Deutsche Gesellschaft f{\"u}r Materialkunde e.V. (DGM)}, address = {Sankt Augustin}, isbn = {978-3-88355-446-4}, pages = {67 -- 67}, year = {2025}, abstract = {Polydopamine (PDA) recently came into focus as an innovative material for applications in various technical fields, especially in the energy field it is considered for batteries as well as for supercapacitors. It is a very strong glue that sticks on almost everything, even under water: In nature, PDA is found in the byssal thread cuticles of mussels. The wet-resistant adhesion ability of PDA can be used in the treatment of separator membranes in batteries, but furthermore PDA is also considered as an electrode material for batteries. We have investigated thin layers of poly-dopamine with different methods including ellipsometry, tactile measurements of the layer thickness and in situ absorption measurements during the polymerization process.}, subject = {Iridium}, language = {en} } @inproceedings{StanikPreglerDoehringetal.2025, author = {Stanik, Eva and Pregler, Jan and D{\"o}hring, Thorsten and K{\"a}tker, Anna and Busch, Uwe and Friedrich, Peter}, title = {A visitor experiment on astronomical x-ray optics for the "Deutsches R{\"o}ntgenmuseum"}, series = {EUV and X-ray Optics: Synergy between Laboratory and Space IX}, volume = {2025}, booktitle = {EUV and X-ray Optics: Synergy between Laboratory and Space IX}, number = {13531}, editor = {Hudec, Ren{\´e} and Pina, Ladislav}, publisher = {SPIE}, doi = {10.1117/12.3056291}, pages = {135310M-1 -- 135310M-7}, year = {2025}, abstract = {The "Deutsches R{\"o}ntgen-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 R{\"o}ntgen, and the effects of his discovery of X-rays. As an integral part of the museum, the R{\"o}Lab 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 R{\"o}ntgen 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 R{\"o}ntgen-Museum" aims to inspire young researchers with enthusiasm for the fascinating world of X-ray optics and X-ray astronomy.}, subject = {Deutsches R{\"o}ntgen-Museum}, language = {en} } @inproceedings{HudecStieglitzDoehringetal.2025, author = {Hudec, Rene and Stieglitz, Veronika and D{\"o}hring, Thorsten and Friedrich, Peter and Burwitz, Vadim}, title = {Novel X-ray optics developed within the AHEAD2020 project}, publisher = {DGaO}, organization = {TH Aschaffenburg}, pages = {1 -- 1}, year = {2025}, abstract = {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.}, subject = {R{\"o}ntgenoptik}, language = {en} } @article{KronebergerStanikDoehring2025, author = {Kroneberger, Monika and Stanik, Eva and D{\"o}hring, Thorsten}, title = {Parameter optimization for the infrared curing process of powder coatings using the NAPUBEST prototype and optical simulations}, series = {EPJ Web of Conferences}, volume = {335}, journal = {EPJ Web of Conferences}, editor = {El Gawhary, O. and Witte, S. and Moreno, I.}, publisher = {EDP Sciences}, issn = {2100-014X}, doi = {https://doi.org/10.1051/epjconf/202533503035}, pages = {1 -- 2}, year = {2025}, abstract = {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.}, subject = {Pulverlack}, language = {en} } @inproceedings{HudecStieglitzDoehringetal.2025, author = {Hudec, Rene and Stieglitz, Veronika and D{\"o}hring, Thorsten and Friedrich, Peter and Burwitz, Vadim}, title = {Novel X-ray optics developed within the AHEAD2020 project}, series = {DGaO-Proceedings}, volume = {2025}, booktitle = {DGaO-Proceedings}, number = {126}, publisher = {DGaO}, organization = {Czech Technical University in Prague}, issn = {1614-8436}, pages = {1 -- 2}, year = {2025}, abstract = {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.}, subject = {R{\"o}ntgenoptik}, language = {en} } @misc{DoehringPreglerKrivanekovaetal.2025, author = {D{\"o}hring, Thorsten and Pregler, Jan and Krivanekova, Lucia and Hildenbrand, Georg}, title = {Strahlungsmessungen beim Erstflug des Stratosph{\"a}renballon-Experiments ASTRABAX}, series = {DGaO-Proceedings}, volume = {2025}, journal = {DGaO-Proceedings}, number = {126}, publisher = {DGaO}, organization = {TH Aschaffenburg}, pages = {1 -- 2}, year = {2025}, abstract = {Mit dem Aschaffenburger Stratosph{\"a}ren-Ballon-Experiment („ASTRABAX") werden Experimente zu Material- und Biowissenschaften unter extremer Strahlungsexposition in großer H{\"o}he durchgef{\"u}hrt. Der erste von drei geplanten Ballonfl{\"u}gen startete Mitte Oktober 2024 im norddeutschen Bad Pyrmont und erreichte eine Flugh{\"o}he 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 Geigerz{\"a}hler. In einem zweiten Satz von Experimenten wurde die Wirkung der Bestrahlung auf Polydopaminproben untersucht, welche derzeit f{\"u}r Beschichtungen von astronomischen R{\"o}ntgenspiegel 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 nat{\"u}rlichen stratosph{\"a}rischen Bedingungen sind f{\"u}r atmosph{\"a}rische H{\"o}henfl{\"u}ge, bemannte Raumfahrtmissionen, vergleichbare Expositionen bei anderen Objekten des Sonnensystems und die strahlenbiologische Forschung von Bedeutung.}, subject = {Stratosph{\"a}ren-Ballon}, language = {de} } @inproceedings{StanikPreglerDoehringetal.2025, author = {Stanik, Eva and Pregler, Jan and D{\"o}hring, Thorsten and K{\"a}tker, Anna and Busch, Uwe and Friedrich, Peter}, title = {A visitor experiment on astronomical X-ray optics for the "Deutsches R{\"o}ntgen Museum"}, series = {Proceedings of SPIE}, volume = {2025}, booktitle = {Proceedings of SPIE}, number = {13531}, publisher = {SPIE}, organization = {Technische Hochschule Aschaffenburg}, pages = {1 -- 1}, year = {2025}, abstract = {The "Deutsches R{\"o}ntgen 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 R{\"o}ntgen and the effects of his discovery of X rays. As an integral part of the museum, the R{\"o}Lab 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.}, subject = {Deutsches R{\"o}ntgen-Museum}, language = {en} } @inproceedings{KronebergerStanikDoehring2025, author = {Kroneberger, Monika and Stanik, Eva and D{\"o}hring, Thorsten}, title = {Optik-Simulation f{\"u}r die Energiewende am Beispiel eines industriellen Infrarot-Heizofens}, series = {DGaO-Proceedings}, volume = {2025}, booktitle = {DGaO-Proceedings}, number = {126}, publisher = {DGaO}, organization = {DigitX}, issn = {1614-8436}, pages = {1 -- 2}, year = {2025}, abstract = {Um fossile Brennstoffe in der industriellen Pulverlackbeschichtung zu ersetzen, kann Infrarottrocknung eingesetzt werden. F{\"u}r komplexe Geometrien, bei denen eine Verschattung die Effizienz der Infrarot-Aush{\"a}rtung mindert, sind die Anordnung der Infrarotstrahler in der reflektierenden Heizkammer, deren Geometrie und die Verweilzeit der Bauteile die Schl{\"u}ssel f{\"u}r erfolgreiche Prozesse.}, language = {de} } @inproceedings{DoehringPreglerKrivanekovaetal.2025, author = {D{\"o}hring, Thorsten and Pregler, Jan and Krivanekova, Lucia and Hildenbrand, Georg}, title = {Strahlungsmessungen beim Erstflug des Stratosph{\"a}renballon-Experiments ASTRABAX}, series = {DGaO-Proceedings}, volume = {2025}, booktitle = {DGaO-Proceedings}, number = {126}, publisher = {DGaO}, organization = {TH Aschaffenburg}, issn = {1614-8436}, pages = {1 -- 2}, year = {2025}, abstract = {Der erste von drei geplanten Ballonfl{\"u}gen beim Aschaffenburger Stratosph{\"a}ren- Ballon-Experiment („ASTRABAX") startete im Oktober 2024 in Bad Pyrmont und erreichte eine Flugh{\"o}he 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 Geigerz{\"a}hler.}, language = {de} } @inproceedings{StanikDoehringReesetal.2025, author = {Stanik, Eva and D{\"o}hring, Thorsten and Rees, Paul and Kroneberger, Monika and Stanik, Martin}, title = {Infrared heating for a sustainable powder coating technology}, series = {DGaO-Proceedings}, volume = {2025}, booktitle = {DGaO-Proceedings}, number = {126}, publisher = {DGaO}, organization = {TH Aschaffenburg}, issn = {1614-8436}, pages = {1 -- 2}, year = {2025}, abstract = {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.}, language = {en} } @misc{KronebergerStanikDoehring2025, author = {Kroneberger, Monika and Stanik, Eva and D{\"o}hring, Thorsten}, title = {Optik-Simulation f{\"u}r die Energiewende am Beispiel eines industriellen Infrarot-Heizofens}, series = {DGaO Proceedings, 126. Tagung}, journal = {DGaO Proceedings, 126. Tagung}, publisher = {DGaO}, organization = {DigitX}, pages = {1 -- 1}, year = {2025}, abstract = {Im Rahmen der Energiewende sollen fossile Brennstoffe auch im Heizofen einer industriellen Pulverlackbeschichtung ersetzt werden. In der Stahlindustrie ist die Infrarottrocknung von ebenen Stahlband-Oberfl{\"a}chen ein bereits seit Jahren bew{\"a}hrtes Verfahren. Pulverlack-Beschichtungen werden jedoch oft auf komplexe Geometrien aufgetragen, bei denen eine Verschattung die Effizienz der Infrarot-Aush{\"a}rtung mindert. Die Anordnung der Infrarotstrahler in der reflektierenden Heizkammer, deren Geometrie und die Verweilzeit der Bauteile sind daher die Schl{\"u}ssel f{\"u}r erfolgreiche Prozesse. Zur Verfahrensoptimierung m{\"u}ssen zudem die optischen Parameter der Pulverlacke w{\"a}hrend des Prozesses bekannt sein, um die n{\"o}tige Strahlungsleistung an Bauteile und unterschiedliche Lacke anpassen zu k{\"o}nnen. Messungen in der NAPUBEST-Prototypanlage werden daher mit optischen Simulationen des Aufbaus abgeglichen, um die Simulationsparameter an die Messergebnisse anzupassen und damit die Grundlage f{\"u}r die Auslegung von industriellen Prozessen zu gew{\"a}hrleisten. Hierbei wird Infrarotstrahlung mehrerer Wellenl{\"a}ngen ber{\"u}cksichtigt, um in unterschiedlichen Ofenzonen ben{\"o}tigte Aufheiz- und Haltephasen zu verwirklichen.}, subject = {Infrarotheizung}, language = {de} } @article{CotroneoBassoCivitanietal.2025, author = {Cotroneo, Vicenzo and Basso, Stefano and Civitani, Marta and D{\"o}hring, Thorsten and Gibertini, Eugenio and Iovenitti, Simone and Magagnin, Luca and Pareschi, Giovanni and Sironi, Giorgia and Spiga, Daniele and Tagliaferri, Gianpiero and Valsecchi, Giuseppe}, title = {Polydopamine Coatings for Enhanced Soft X-Ray Reflectivity in Space Telescope Mirrors}, series = {ECS Meeting Abstracts}, volume = {MA2025-02}, journal = {ECS Meeting Abstracts}, number = {67}, publisher = {The Electrochemical Society}, issn = {2151-2043}, doi = {10.1149/MA2025-02673247mtgabs}, pages = {3247 -- 3247}, year = {2025}, abstract = {It has been known for years that sputtered low-density coatings deposited under vacuum (e.g. carbon or B4C), applied on top of high-density metallic coatings, can enhance their reflectivity in the soft X-ray band (below ~5 keV). However, the physical deposition techniques, as vacuum-based sputtering, to produce B4C or amorphous coatings are usually difficult and highly costing. Polydopamine (PDA), a bio-polymer inspired by mussels, exhibits exceptional surface binding and it's nowadays a popular material used in surface engineering for multipurpose applications (Ryu, 2018). PDA thin film are typically produced in aqueous solution by the oxidative polymerization of dopamine, commonly known as one of the "hormones of happiness", resulting in nanometric PDA coating with tunable thickness and morphology. In recent years, we have introduced and investigated a novel and scalable strategy for enhancing the soft X-ray reflectivity of telescope mirrors used in space missions based on dip-liquid deposition of PDA thin films as carbon-rich coating (carbon 62.7 \%wt. in DA monomer) (Cotroneo, 2022). This method is very versatile and quick and offers a low-cost alternative to conventional carbon-like coating, while maintaining or even exceeding performance in the energy range below ~5 keV. Experimental tests across three X-ray beamlines—including two synchrotron facilities—demonstrated consistent reflectivity enhancement, especially in the 1-4 keV energy range and with a good match between theoretical predictions and experimental reflectivity profiles. When applied over traditional coatings (e.g Au, Ir), the dip-liquid overcoats produced improvements of up to 100\% in effective area for some specific X-ray bands compared to conventional single-metal films. These results are particularly compelling for nickel-replicated mirrors with gold coatings, a common architecture in cost-sensitive space missions. Bibliography Cotroneo, V., 2022. Dopamine dip-liquid overcoatings for soft x-ray reflectivity enhancement. SPIE Proceedings. Ryu, J. H., 2018. Polydopamine Surface Chemistry: A Decade of Discovery. ACS Applied Materials \& Interfaces.}, subject = {R{\"o}ntgenteleskop}, language = {en} } @inproceedings{BuschMichelsKaetkeretal.2025, author = {Busch, Uwe and Michels, Marcel and K{\"a}tker, Anna and D{\"o}hring, Thorsten and Stanik, Eva}, title = {Historical X ray images selected for UNESCO's Memory of the World Register}, volume = {16}, publisher = {16th International Conference on Astronomical X-ray Optics}, address = {Prag}, organization = {Deutsches R{\"o}ntgenmuseum Remscheid}, pages = {1 -- 1}, year = {2025}, abstract = {The Deutsches R{\"o}ntgen Museum" in Remscheid (Germany) is the institution that uniquely and comprehensively explores and documents the life and work of Wilhelm Conrad R{\"o}ntgen and the impact of his discovery. It preserves a collection of X- ray images taken by W. C. R{\"o}ntgen during his research. Among them are three images of R{\"o}ntgen's own hands and those of his wife, Anna Bertha. Three more images show R{\"o}ntgen's hunting rifle, which he was able to analyze internally by using the new X ray technology. These two series of historical pictures from the years 1895 and 1896 provide an outstanding illustration of the scientific revolution that R{\"o}ntgen's discovery triggered especially in medicine and in materials science. Therefore, his discovery of X-rays ranks among the most groundbreaking scientific achievements of modern times. In April 2025 those very first recorded X ray photographs were added on the UNESCO Memory of the World Register. The corresponding public ceremony took place on September 10 2025 in R{\"o}ntgen ´ s birth town Remscheid. Representatives of the German UNESCO Commission, of politics, and of the German R{\"o}ntgen Society were present UNESCO is thus honoring not only R{\"o}ntgen's groundbreaking discovery of X rays, but also the cultural, scientific, and technological implications of his early radiographs. The "Deutsches R{\"o}ntgen Museum" presents six famous historical X-ray documents to the public, which are now part of UNESCO ´ s Memory of the World Register.}, subject = {Deutsches R{\"o}ntgen-Museum}, language = {en} } @inproceedings{DoehringKrivanekovaHildenbrand2025, author = {D{\"o}hring, Thorsten and Krivanekova, Lucia and Hildenbrand, Georg}, title = {ASTRABAX - Scientific results of two stratospheric balloon flights}, series = {18th Pico- and Nanosatellite Workshop 2025, Abstracts Book}, volume = {2025}, booktitle = {18th Pico- and Nanosatellite Workshop 2025, Abstracts Book}, publisher = {Julius-Maximilians-Universit{\"a}t W{\"u}rzburg}, address = {W{\"u}rzburg}, organization = {TH Aschaffenburg}, pages = {17 -- 17}, year = {2025}, abstract = {The ASTRABAX experiment ("Aschaffenburg Stratospheric Balloon Experiment") uses a multimodal platform to study radiation exposures in the upper atmosphere. We present a modular approach to accommodate the numerous setups under the weight restriction of light unmanned free stratospheric balloon. The compartmental setup allows flexibility to address current research questions with low expenditure in costs, manpower and technology expertise. Its easy implementation is suitable for educational purposes of students in the fields of astronomy, astrobiology, and material research. Recently, two stratospheric balloons were flown to test the feasibility and connectivity of different building blocks in a temperature-controlled gondola, and to characterize the stratospheric radiation environment.The focus of the physical experiments is the observation of the UV-C spectral region using miniature UV-VIS spectrometers, and cosmic ray dosimetry with a Geiger counter. A second set of experiments assesses the effects of irradiation on polydopamine coatings intended for the application in space-born X-ray telescopes. The platform also contains samples of biological cells that are simultaneously exposed to low-dose radiation of different compositions of particle, X-ray and UV radiation. Post-flight nanoscopic measurements aim to examine changes in the spatial chromatin organization playing a crucial role in DNA-repair mechanisms. Investigations in such natural environment are of importance for high altitude atmospheric as well as space flights, for comparable exposures on other objects of the solar system and for astrobiology.}, subject = {Stratosph{\"a}ren-Ballon}, language = {en} } @inproceedings{HudecDoehring2025, author = {Hudec, Rene and D{\"o}hring, Thorsten}, title = {Astrophysical and scientific payloads for CubeSats}, series = {18th Pico- and Nanosatellite Workshop 2025, Abstracts Book}, volume = {2025}, booktitle = {18th Pico- and Nanosatellite Workshop 2025, Abstracts Book}, publisher = {Julius-Maximilians-Universit{\"a}t W{\"u}rzburg}, address = {W{\"u}rzburg}, organization = {Czech Technical University in Prague}, pages = {12 -- 12}, year = {2025}, abstract = {For scientific and commercial applications, CubeSats enable cost-effective missions and significantly reduce the time between mission concept and launch compared to classical large satellites. Since 2000, there has been an accelerating increase in CubeSat launches, which in turn is expected to drive up the demand for dedicated optical instruments, especially in commercially relevant areas like high-resolution optics for earth observation. We present some studies and ideas of application of CubeSats mainly in the field of astronomy and astrophysics elaborated and studied at the Czech Technical University in Prague in collaboration with Aschaffenburg University of Applied Sciences. These includes single CubeSats as well as tandem CubeSat constellations. These miniature satellites can carry miniature scientific payloads for high-energy observations of both astrophysical objects as well as targets in high earth atmosphere. The examples include miniature X-ray and UV telescopes monitors and cameras, but also optical and NIR payloads. Due to the recent progress in satellite control engineering, tandem flight arrangements of mini-satellites are currently in discussion and under consideration for future space missions. CubeSat technologies offer an interesting possibility for space-born telescope payloads based on this approach. In such scenario, two small satellites will fly at a constant distance of a few meters up to 100 meters. Thereby, the front satellite will carry the telescope optics and the second satellite the detector system. The tandem flight arrangements are crucial for design of space telescopes with larger focal distances exceeding the typical sizes of small satellites.}, subject = {Kleinsatellit}, language = {en} } @inproceedings{DoehringHudec2025, author = {D{\"o}hring, Thorsten and Hudec, Rene}, title = {One decade of joint Bavarian-Czech projects on astronomical X-ray optics}, volume = {2025}, number = {16}, publisher = {16th International Conference on Astronomical X-ray Optics}, address = {Prag}, organization = {TH Aschaffenburg}, pages = {1 -- 1}, year = {2025}, abstract = {Since ten years, Aschaffenburg University of Applied Sciences and the Czech technical university in Prague are now cooperating. During the recent decade, eleven joint projects have been executed, mainly targeting the development of astronomical X-ray optics. The bilateral cooperation also included the exchange of PhD students and scientists, cost compensation for conference participations, and the sponsoring of scientific conferences (AXRO and IBWS). The scientific output up to date are more than twenty joint publications and many individual conference contributions of the project partners in addition. The Bavarian-Czech Academic Agency (BTHA) has funded all of these projects. It is the goal of the Bavarian-Czech Academic Agency to support the academic collaboration in research and education and to contribute to an increased cooperation of the two neighbored countries Bavaria and Czech Republic in general. We will give a review on one decade of our Bavarian-Czech cooperation and on the scientific results of our joint projects on astronomical X-ray optics.}, subject = {R{\"o}ntgenoptik}, language = {en} } @inproceedings{KhropostRiethmuellerDoehringetal.2025, author = {Khropost, Diana and Riethm{\"u}ller, Franziska and D{\"o}hring, Thorsten and Flachs, Dennis and H{\"u}lag{\"u}, Deniz and Hertwig, Andreas and Cotroneo, Vincenzo and Gibertini, Eugenio}, title = {Polydopamine: a bio-inspired polymer for X-ray mirror coatings and other technical applications}, series = {EUV and X-ray Optics: Synergy between Laboratory and Space IX}, volume = {2025}, booktitle = {EUV and X-ray Optics: Synergy between Laboratory and Space IX}, number = {13531}, editor = {Hudec, Ren{\´e} and Pina, Ladislav}, publisher = {SPIE}, doi = {10.1117/12.3056298}, pages = {135310H-1 -- 135310H-11}, year = {2025}, abstract = {Although the organic molecule dopamine (3,4-dihydroxyphenethylamine) is commonly known as one of the "hormones of happiness", thin polymer films of polydopamine (PDA) also have interesting technical properties. PDA is a very strong glue that sticks on almost everything, even under water. In nature, PDA is found in the byssal thread cuticles of mussels. When produced by dip-coating, the self-organizing PDA layers grow in a reproducible thickness of single or multiple molecule monolayers of a few nanometres thickness only. Here we present an optimized preparation regime as derived from polymerization analysis through absorption spectroscopy. One application is the use of thin PDA overcoatings to increase the soft X-ray reflectivity of astronomical X-ray mirrors. Furthermore, we give an outlook to other technical applications for this interesting material, presenting this bio-inspired organic polymer as an innovative technical solution for the future, with applications such as PDA-based super-capacitors and its promising role in enhancing separator materials for batteries.}, subject = {R{\"o}ntgenspiegel}, language = {en} }