TY - CHAP A1 - Krieg, Janina A1 - Carre, Antoine A1 - Döhring, Thorsten A1 - Hartmann, Peter A1 - Hull, Tony A1 - Jedamzik, Ralf A1 - Westerhoff, Thomas T1 - The past decade of ZERODUR® glass-ceramics in space applications T2 - Proceedings of SPIE N2 - For the past four decades, ZERODUR® glass ceramics has flown on many satellites including the prominent space missions METEOSAT, Hubble Space Telescope, CHANDRA, and LISA pathfinder. Firstly, this unique material is chosen as mirror substrate for high precision optics due to its extreme thermal stability. Its near-zero thermal expansion over a wide temperature range of several tens of Kelvin is homogenous within the entire volume. This enables control of the ZERODUR®’s surface profile at the 10-picometer level. SCHOTT has conducted comprehensive material characteristics studies on the mechanical properties and the radiation environment effects experienced in realistic orbits to define the suitability of ZERODUR® to survive both high loads during launch and to support long-term missions, respectively. Besides these advantageous material properties, this glass-ceramics can be extremely light-weighted by precision grinding enabled by the new SCHOTT competence center for machining and metrology. In this paper, we will continue to trace the recent developments of ZERODUR® glass ceramics as space material in the context of selected missions flown since 2009 and those anticipated. Major milestones such as the LISA pathfinder mission are discussed. Furthermore, we outline the viable use of ZERODUR® for great observatory architectures for IR/O/UV spaceborne telescopes. The objective of this paper is to supplement an earlier review of the use of ZERODUR® for space applications in the past decade and to summarize the latest progress and results of material studies toward very efficient production capabilities for high-performance light-weighted mirror substrates. KW - mirror KW - space KW - glass ceramics KW - low thermal expansion KW - satellite KW - Spiegelteleskop KW - Zerodur KW - Glaskeramik Y1 - 2022 U6 - https://doi.org/https://doi.org/10.1117/12.2628956 VL - 2022 IS - 12180 SP - 121805N-1 EP - 121805N-15 PB - SPIE ER - TY - CHAP A1 - Hudec, Rene A1 - Gille, Florian A1 - Guimbelot, Elzear A1 - Tichy, Vladimir A1 - Döhring, Thorsten T1 - Effective areas of astronomical X-ray optics for cubesats and rocket experiments T2 - DGaO Proceedings N2 - The effective area is one of the main telescope parameters when justifying real space application. We discuss the estimation of the effective collecting area of an X-ray telescope by two different methods, an analytical method and a simulation algorithm, and then compare the results. The Lobster Eye type telescopes considered here are designed for rocket experiments and CubeSat flights. KW - X-ray KW - telescope KW - satellite KW - effective area KW - Lobster Eye KW - Röntgenteleskop Y1 - 2022 UR - https://www.dgao-proceedings.de/download/123/123_p12.pdf SN - 1614-8436 VL - 2022 IS - 123 SP - 1 EP - 2 PB - DGaO ER - TY - GEN A1 - Hudec, Rene A1 - Gille, Florian A1 - Guimbelot, Elzear A1 - Tichy, Vladimir A1 - Döhring, Thorsten T1 - Effective areas of astronomical X-ray optics for cubesats and rocket experiments N2 - We address the problem of estimation the sensitivity of astronomical X-ray telescopes of Lobster Eye type , with emphasis on calculation of effective areas for telescopes designed for rocket and CubeSat flights. This parameter is one of the principal parameters when justifying the real space application. Indeed, the larger the effective area is, the more efficient the optical system is, able to provide images of fainter and more distant celestial targets. We discuss the estimation of the effective collecting area of a X-ray telescope by two different methods and then compare the results: the analytical method and then the simulation algorithm. N2 - Poster KW - CubeSat KW - rocket KW - X-ray KW - telescope KW - effective area KW - Röntgenteleskop Y1 - 2022 SP - 1 EP - 1 PB - DGaO ER - TY - CHAP A1 - Döhring, Thorsten A1 - Stollenwerk, Manfred A1 - Schmitt, Paul A1 - Szeghalmi, Adriana T1 - Environmentally stable iridium mirror coatings for the infrared spectral range T2 - Proceedings of SPIE N2 - Highly reflective metal coatings are essential for numerous optical elements. Established mirror coatings made of silver (Ag) and gold (Au) offer high and broadband self-reflection in the infrared (IR) spectral range but are susceptible to environmental influences and mechanical stress without suitable protective layers. In the long-wavelength spectral range, in particular, the absorption bands of these protective layers partially reduce the high mirror reflectivity again. However, the noble metal iridium (Ir) is hard, extremely dense, and thermally, mechanically, and chemically stable. Iridium provides a similarly high reflectivity in the mid (MIR) and far-infrared (FIR) spectral range, as silver and gold, and high resistance to environmental influences - even without protective layers. In this paper, the different deposition processes, as well as the optical and structural properties of iridium mirror coatings fabricated by atomic layer deposition (ALD) and by magnetron sputtering (MS), are presented and compared with each other. The complex refractive indices for ALD and MS deposited iridium mirror coatings were determined for wavelengths from 200 nm to 20 μm, complementing the existing literature values. We demonstrate that iridium mirror coatings offer a high and broadband reflectivity from the mid to far-infrared spectral range. In contrast to established – protected – silver and gold mirror coatings, the iridium coatings are environmentally durable and thermally stable up to 600 °C, even without protective layers. Therefore, as an interesting mirror coating material, iridium has the potential for special applications in infrared astronomy and probably also for industrial instruments. KW - iridium KW - coating KW - magnetron sputtering KW - atamic layer deposition KW - reflectivity KW - Iridium KW - Beschichtung Y1 - 2022 U6 - https://doi.org/https://doi.org/10.1117/12.2632057 VL - 2022 IS - 12298 SP - 122980A-1 EP - 122980A-08 PB - SPIE ER - TY - CHAP A1 - Döhring, Thorsten A1 - Stieglitz, Veronika A1 - Hudec, Rene A1 - Sapsai, Iryna A1 - Friedrich, Peter A1 - Burwitz, Vadim T1 - Characterization of a lobster-eye type X-ray telescope T2 - EOSAM-Conference N2 - Lobster-eye type X-ray telescopes use reflecting plano mirrors under grazing incidence and can observe a large field of view. As part of a Bavarian-Czech cooperation, two telescopes were build, equipped with mirrors coated with gold and iridium. Their X-ray characterization was carried out at the PANTER test facility, which simulates parallel starlight incident on the telescopes. The telescopes have an angular resolution of about 4 arc minutes in X-rays and a focal length of about 2 meters. The used X-ray mirrors reflect and focus visible light as well; their functionality in the optical regime was checked in laboratory tests. Now another test campaign will be carried out to examine the telescope resolution for real objects of the visible night sky and the imaging properties for star constellations. KW - Lobster-Eye KW - X-ray KW - telescope KW - iridium KW - mirror KW - Röntgenteleskop KW - Iridium KW - Röntgenspiegel Y1 - 2022 UR - https://www.europeanoptics.org/events/eos/eosam2022.html VL - 2022 SP - 1 EP - 1 ER - TY - CHAP A1 - Hudec, Rene A1 - Pomahač, Vit A1 - Stanik, Eva A1 - Döhring, Thorsten A1 - Schilling, Klaus T1 - Space Telescopes based on Satellite Tandem Flights T2 - DGaO Proceedings N2 - Progress in satellite control engineering enables tandem flight arrangements of mini-satellites in future space missions. Cost effective CubeSat technologies offer an interesting possibility for space-born telescope payloads. Two small satellites will carry the telescope optics and the detector system, respectively. Related formation flight requirements could be transferred from the NetSat-Mission. KW - Astronomy KW - CubeSat KW - Satellite KW - Tandem Flight KW - Telescope KW - Röntgenteleskop KW - Kleinsatellit Y1 - 2023 UR - https://www.dgao-proceedings.de/download/124/124_p29.pdf SN - 1614-8436 VL - 2023 ER - TY - GEN A1 - Stanik, Eva A1 - Döhring, Thorsten A1 - Schreiber, Kai A1 - Kätker, Anna A1 - Busch, Uwe T1 - X-ray honour gallery - award winners of the Röntgen Medal N2 - Starting in 1951, on the 50th anniversary of the award of the first Nobel Prize for physics to Wilhelm Conrad Röntgen, the Lord Mayor of the German city of Remscheid has annually awarded Röntgen Medals to scientists who "in the broadest sense have made a special contribution to the progress and dissemination of X-ray discoveries in the theoretical and applied sciences". The Röntgen Medal has become highly recognized in the scientific world. To date, more than one hundred scientists have received this honour. Through their chronology, this contribution presents a "Who’s Who" of X-ray science and provides selected insights into their scientific work; with special focus on the fields of X-ray optics and X-ray astronomy. N2 - Poster KW - X-ray KW - X-ray discoveries KW - X-ray optics KW - X-ray astronomy KW - Röntgen Medal KW - Röntgen, Wilhelm Conrad, 1845-1923 KW - Medaille KW - Röntgenstrahlung Y1 - 2022 ER - TY - GEN A1 - Schreiber, Kai A1 - Kätker, Anna A1 - Busch, Uwe A1 - Stanik, Eva A1 - Döhring, Thorsten T1 - Insights into the history of X-rays: the Deutsches Röntgen-Museum in Remscheid N2 - In 1895, Professor Wilhelm Conrad Röntgen detected a new kind of radiation that was able to penetrate solid materials, which he called x-rays. In 1901 Röntgen received the first Nobel Prize in physics in honour of this ground breaking discovery. The Deutsches Röntgen-Museum in Remscheid in Germany is the institution that uniquely and comprehensively explores and documents the life and work of W. C. Röntgen and the impact of his discovery. The museum’s location in Remscheid is not coincidental, with Röntgen’s birthplace only a short walk away from its exhibits. Every visit to the museum amounts to a unique expedition through the worlds of medicine, science, and technology. The museum’s emphasis on the diversity of Röntgen’s invention by a multilingual, multi-medial approach enables all visitors to make their own personal discoveries. The Deutsches Röntgen-Museum in Remscheid is a mustsee for x-ray scientists from anywhere in the world. This contribution provides an insight into the history of x-rays and offers a guided tour of the Deutsches Röntgen-Museum and its exhibits. N2 - Poster KW - X-ray history KW - Deutsches Röntgen-Museum KW - Wilhelm Conrad Röntgen KW - X-rays KW - Röntgen, Wilhelm Conrad, 1845-1923 KW - Röntgenstrahlung KW - Deutsches Röntgen-Museum Y1 - 2022 ER - TY - GEN A1 - Hudec, René A1 - Pomahac, Vit A1 - Döhring, Thorsten A1 - Stanik, Eva A1 - Klaus, Schilling T1 - Space Telescopes based on Satellite Tandem Flights T2 - DGaO Jahrstagung N2 - 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 a 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. Related formation flight requirements were addressed in the NetSat-Mission, composed of four 3U-CubeSats, launched 2020. Space technology challenges concern in particular orbit control by an appropriate propulsion system as well as precision attitude pointing towards the joint target, and could be transferred from the NetSat-mission to the proposed Tandem Mission. This will allow space-based telescopes with a long focal length even placed on board of small or miniature CubeSat-type satellites. Cost effective Kirkpatrick-Baez type X-ray telescopes represent an important application here as they have longer focal lengths compared to previous astronomical observatories using Wolter I type X-ray mirrors. N2 - Poster KW - Satellite KW - CubeSat KW - Tandem Flight KW - Astronomy KW - Telescope KW - Röntgenteleskop KW - Kleinsatellit Y1 - 2023 UR - https://www.dgao-proceedings.de/abstract/abstract_only.php?id=2951 VL - 2023 SP - 1 EP - 1 PB - DGaO ER - TY - CHAP A1 - Schreiber, Kai A1 - Kätker, Anna A1 - Busch, Uwe A1 - Stanik, Eva A1 - Döhring, Thorsten T1 - A guided tour of the Deutsches Röntgen-Museum: displaying X-ray history T2 - SPIE Proceedings N2 - In 1895, Professor Wilhelm Conrad Röntgen detected a new type of radiation that was able to penetrate solid materials, which he called X-rays. In 1901 Röntgen received the first Nobel Prize in physics in honour of this ground breaking discovery. The Deutsches Röntgen-Museum (DRM) in Remscheid (Germany) is the institution that uniquely and comprehensively explores and documents the life and work of W. C. Röntgen and the impact of his discovery. The DRM’s location in Remscheid is not coincidental, with Röntgen’s birthplace only a short walk away from the exhibits. Every visit to the museum amounts to a unique expedition through the worlds of medicine, science and technology. The museum’s emphasis on the diversity of Röntgen’s invention by a multilingual, multi-medial approach enables all visitors to make their own personal discoveries. The Deutsches Röntgen-Museum in Remscheid is a must-see for X-ray scientists from anywhere in the world. This contribution provides an insight into the history of X-rays and offers a guided tour of the Deutsches Röntgen-Museum and its exhibits. KW - Wilhelm Conrad Röntgen KW - X-ray KW - science history KW - education KW - Röntgen, Wilhelm Conrad, 1845-1923 KW - Röntgenstrahlung KW - Deutsches Röntgen-Museum Y1 - 2023 U6 - https://doi.org/doi: 10.1117/12.2665419 VL - 2023 IS - 12576 SP - 125760A-1 EP - 125760A-9 PB - SPIE ER - TY - CHAP A1 - Stanik, Eva A1 - Döhring, Thorsten A1 - Schreiber, Kai A1 - Kätker, Anna A1 - Busch, Uwe T1 - The Röntgen Medal: honouring X-ray excellence T2 - SPIE Proceedings N2 - Starting in 1951, the 50th anniversary of the award of the first Nobel Prize for physics to Wilhelm Conrad Röntgen, the Lord Mayor of the German City of Remscheid has given out Röntgen Medals. The Röntgen Medal annually honours scientists who "in the broadest sense have made a special contribution to the progress and dissemination of X-ray discoveries in the theoretical and applied sciences". The Röntgen Medal has become highly recognized in the scientific world. To date, more than one hundred excellent scientists have received the honour. Through their chronology, this contribution presents a "Who’s Who" of X-ray science and provides selected insights into their scientific work; with the fields of X-ray optics and X-ray astronomy receiving special focus. KW - Röntgen medal KW - X-ray optics KW - X-ray astronomy KW - science history KW - Röntgen, Wilhelm Conrad, 1845-1923 KW - Auszeichnung KW - Röntgenoptik KW - Röntgenastronomie Y1 - 2023 U6 - https://doi.org/doi: 10.1117/12.2665424 VL - 2023 IS - 12576 SP - 1257608-1 EP - 1257608-8 PB - SPIE ER - TY - CHAP A1 - Pomahac, Vit A1 - Hudec, Rene A1 - Döhring, Thorsten T1 - CubeSat tandem flight for asteroid surveillance T2 - SPIE Proceedings N2 - Conventional mining might not be sufficient to support the growth of humankind which is heavily dependent upon rare materials in technical applications. Asteroid mining might be an answer, with Near-Earth objects (NEOs) being the first targets. However, the first step in the asteroid mining cascade is to probe reachable asteroids. Moreover, to identify the best candidates for further activities hundreds to thousands of asteroids must be screened. The fast progressing development of CubeSats might allow the space community to do the initial in-situ screening in a minimalistical and economical manner. Additionally, formation flying might enable the miniaturization of optical payloads for asteroid composition analysis in CubeSats. The recent developments in formation flying are summarised in this study and the possibility of utilizing formation flying CubeSats for asteroid surveillance explored. KW - asteroid surveillence KW - asteroid mining KW - formation flight KW - tandem flight KW - CubeSat KW - Planetoid KW - Rohstoffgewinnung KW - Kleinsatellit Y1 - 2023 U6 - https://doi.org/doi: 10.1117/12.2672396 VL - 2023 IS - 12576 SP - 125760H-1 EP - 125760H-5 PB - SPIE ER - TY - CHAP A1 - Döhring, Thorsten A1 - Stieglitz, Veronika A1 - Friedrich, Peter A1 - Burwitz, Vadim A1 - Jelinek, Martin A1 - Hudec, Rene T1 - Testing of lobster-eye type telescopes with X-rays and visible light T2 - SPIE Proceedings N2 - Reflective coatings for astronomical X-ray optics were developed at the “Aschaffenburg Competence Center for Astronomical and Space Instrumentation” (ACCASI) since several years. As part of a Bavarian-Czech cooperation between the Technical University of Aschaffenburg and the Czech Technical University of Prague, now two mechanically identical telescopes were built. One telescope optic was equipped with conventional gold-coated mirrors, manufactured by the Czech project partners. The 34 X-ray mirrors of the second telescope use an innovative coating system made of chromium and iridium, which was applied at the Aschaffenburg coating laboratory. Both telescopes are designed according to the bionic principle of a reflecting lobster eye. The optics works with two consecutive reflections on mutually perpendicular mirror surfaces. This enables a large field of view with many square degrees in diameter, which, however, comes at the price of a reduced angular resolution. An extensive X-ray characterization of these telescopes was carried out at the PANTER test facility of MPE, which simulates parallel starlight incident on the telescopes. The telescopes have an angular resolution of about 4 arc minutes in X-rays and a focal length of about 2 meters. Furthermore, the used X-ray mirrors reflect and focus visible light as well and this functionality in the optical regime was checked in laboratory tests. Now another test campaign was done to examine the telescope resolution for real objects of the visible sky and the imaging properties for star constellations. Such functional tests by observing astronomical objects of the visible sky may simplify and accelerate the development of X-ray telescopes for satellite applications. KW - X-rays KW - Telescopes KW - X-ray telescopes KW - Reflection KW - Mirrors KW - Röntgenteleskop Y1 - 2023 U6 - https://doi.org/https://doi.org/10.1117/12.2665429 VL - 2023 IS - 12576 SP - 1257606-1 EP - 1257606-5 PB - SPIE ER - TY - CHAP A1 - Ermilova, Elena A1 - Hertwig, Andreas A1 - Döhring, Thorsten A1 - Stanik, Eva A1 - Cotroneo, Vincenzo A1 - Gibertini, Eugenio T1 - Ellipsometrical characterization of poly-dopamine layers considered for technical applications T2 - Proceedings of SPIE N2 - Although the organic molecule dopamine (3,4-dihydroxyphenethylamine) is commonly known as the “hormone of happiness”, thin films of poly-dopamine also have interesting technical properties. When produced by dip coating, the self-organizing layers grow in a reproducible thickness of single or multiple molecule monolayers of a few nanometer thickness only. In this work, we introduce a method of determining the layer thickness of poly-dopamine on mirrors for astronomical X-ray telescopes. This work is based on spectroscopic ellipsometry measurements and involves the development of an optical model for the poly-dopamine layers including the dielectric function. Thereby the complex refractive index of the produced layers was determined, covering the range from the ultraviolet to the near infrared spectral region. These measurement results and the corresponding technical challenges are presented in this contribution. Furthermore, an outlook to potential technical applications of this interesting material is given and poly-dopamine layers will make scientist and engineers hopefully happy as an innovative and fascinating technical solution for the future. KW - dopamine KW - ellipsometry KW - refractive index KW - thin films KW - X-ray mirror KW - Dünne Schicht KW - Dopamin KW - Ellipsometrie Y1 - 2024 UR - https://doi.org/10.1117/12.3015281 U6 - https://doi.org/https://doi.org/10.1117/12.3015281 VL - 2024 IS - 13013 SP - 1301309-1 EP - 1301309-8 ER - TY - GEN A1 - Stanik, Eva A1 - Döhring, Thorsten A1 - Zeising, Sebastian A1 - Meißner, Martin T1 - An astronomy event at Aschaffenburg University to attract future engineering students T2 - 18th INTEGRAL/BART Workshop N2 - In 2023 the German Federal Ministry of Education and Research (BMBF) and the German organization for science communication “Wissenschaft im Dialog” (German for: Science in dialogue) jointly proclaimed a "Science Year" with the motto “Our Universe”. One of the numerous events that have been supported thereby has been that of the project "Zirkus UNI-versum" (in English: "Circus UNI-verse"), which took place in summer 2023 at Aschaffenburg University of Applied Sciences. Two school classes from the local high school “Kronberg-Gymnasium” first experienced an interactive astronomy lecture including a planetarium star show in a tent. Another highlight was the rocket car race in front of the cafeteria and the exclusive launch of a water rocket on the campus green. After the collective countdown, it reached a height of around eighty meters and thus rose higher than all the trees and buildings on the campus site. For their own exploration of the night sky the pupils obtained small cardboard star maps to assemble themselves as a homework. On the summer evenings of the following school holidays, they certainly observed the sky with a different point of view and, above all, with expert knowledge. The event has given them interesting impressions of Aschaffenburg Technical University as an attractive local education facility. The project "Zirkus UNI-versum" – and other activities for schools – intend to stimulate the interest of pupils in STEM subjects and to attract future engineering students. N2 - Poster KW - astronomy event KW - MINT KW - engineering students KW - STEM KW - Astronomie KW - Vorlesung Y1 - 2024 VL - 2024 SP - 1 EP - 1 ER - TY - JOUR A1 - Döhring, Thorsten A1 - Stanik, Eva A1 - Zeising, Sebastian A1 - Meissner, Martin T1 - Astronomy events at Aschaffenburg University to attract future students JF - Acta Polytecnica N2 - 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. KW - astronomy KW - education KW - STEM KW - planetarium KW - rocket propulsion KW - Astronomie KW - Schüler KW - MINT-Fächer Y1 - 2025 UR - https://dspace.cvut.cz/handle/10467/121689 VL - 2025 IS - 65 (1) SP - 1 EP - 6 ER - TY - CHAP A1 - Stanik, Eva A1 - Döhring, Thorsten A1 - Pregler, Jan A1 - Kätker, Anna A1 - Busch, Uwe A1 - Friedrich, Peter T1 - A visitor experiment on astronomical X-ray optics for the "Deutsches Röntgen-Museum" T2 - AXRO 2024 - 15th International Conference on Astronomical X-Ray Optics N2 - The “Deutsches Röntgenmuseum” in Remscheid is the unique institution worldwide that researches and documents the life and work of the first Nobel Prize winner, 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. An optical set-up with visible light illustrate 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 Röntgenmuseum” intend to inspire young researchers for the fascinating world of X-ray optics and X-ray astronomy. KW - X-ray astronomy KW - X-ray optics KW - X-ray telescope KW - Deutsches Röntgen-Museum KW - Deutsches Röntgen-Museum KW - Röntgen, Wilhelm Conrad, 1845-1923 KW - Röntgenstrahlung Y1 - 2024 VL - 2024 SP - 1 EP - 1 ER - TY - CHAP A1 - Khropost, Diana A1 - Riethmüller, Franziska A1 - Stanik, Eva A1 - Döhring, Thorsten A1 - Hertwig, Andreas A1 - Huelague, Deniz T1 - Polydopamine – a bionic material and its potential applications for batteries T2 - MaterialsWeek 2025 – Book of Abstracts N2 - 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. KW - polydopamine KW - PDA KW - bionic material KW - adhesion KW - absorption KW - Iridium KW - Katalysator KW - Wasserstoffenergietechnik Y1 - 2025 SN - 978-3-88355-446-4 SP - 67 EP - 67 PB - Deutsche Gesellschaft für Materialkunde e.V. (DGM) CY - Sankt Augustin ER - 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 -