TY - CHAP A1 - Hudec, Rene A1 - Pina, Ladislav A1 - Inneman, Adolf A1 - Semencova, Veronika A1 - Döhring, Thorsten T1 - X/EUV and UV optics for miniature cubesats payloads T2 - DGaO-Proceedings N2 - The recent progress in cubesat technologies allows scientific payloads for these minisatellites to be considered. We will discuss the possible miniature X/EUV and UV telescopes and monitors as potential minisats payloads. The advanced electronics image detectors allows the size of the optics to be miniaturized, still providing valuable scientific results. KW - satellite KW - payload KW - X-ray KW - optics KW - Kleinsatellit Y1 - 2019 UR - https://www.dgao-proceedings.de/download/120/120_p21.pdf SN - 1614-8436 VL - 2019 SP - 1 EP - 1 PB - DGaO ER - TY - CHAP A1 - Stehlikova, Veronika A1 - Probst, Anne-Catherine A1 - Nentvich, Ondrej A1 - Urban, Martin A1 - Inneman, Adolf A1 - Sieger, Ladislav A1 - Marsikova, Veronika A1 - Döhring, Thorsten T1 - Development of iridium coated silicon X-ray mirrors for Lobster Eye astronomical telescopes T2 - Proceedings of EOSMOS 2017 N2 - In the field of X-ray astronomy different types of telescope optics based on grazing incidence mirrors can be used. This contribution presents a special design of a Lobster Eye wide-field telescope with mirrors based on flat silicon wafers and the task of coating such mirror substrates with reflective iridium layers. KW - X-ray KW - mirror KW - telescope KW - Lobster Eye KW - iridium KW - Iridium KW - Röntgenteleskop Y1 - 2017 VL - 2017 IS - EOSMOS 2017 SP - 1 EP - 2 PB - European Optical Society ER - TY - CHAP A1 - Döhring, Thorsten A1 - Probst, Anne-Catherine A1 - Stehlikova, Veronika A1 - Skala, Petr A1 - Inneman, Adolf A1 - Hudec, Rene T1 - JEUMICO – Bayerisch-tschechische Kooperation zur Entwicklung von Röntgenteleskopen T2 - DGaO-Proceedings N2 - Das Projekt JEUMICO wird vom Projektträger BAYHOST im Rahmen eines Programms für bilaterale wissenschaftliche Projekte zwischen Tschechien und Bayern gefördert. Inhaltlich werden von der Hochschule Aschaffenburg und der Technischen Universität Prag hier gemeinsam Röntgenoptiken für ein geplantes astronomisches Experiment an Bord einer NASA-Höhenrakete entwickelt. KW - Röntgenstrahlung KW - Teleskop KW - Astronomie KW - Spiegel KW - Röntgenstrahlung KW - Spiegelteleskop Y1 - 2017 UR - http://www.dgao-proceedings.de/download/118/118_p4.pdf SN - 1614-8436 VL - 2017 IS - 2017 PB - DGaO ER - TY - CHAP A1 - Döhring, Thorsten A1 - Probst, Anne-Catherine A1 - Stollenwerk, Manfred A1 - Emmerich, Florian A1 - Stehlíková, Veronika A1 - Inneman, Adolf ED - Hudec, René ED - Pina, Ladislav T1 - Prototyping iridium coated mirrors for X-ray astronomy T2 - Proceedings of the International Society for Optics and Photonics N2 - X-ray astronomy uses space-based telescopes to overcome the disturbing absorption of the Earth´s atmosphere. The telescope mirrors are operating at grazing incidence angles and are coated with thin metal films of high-Z materials to get sufficient reflectivity for the high-energy radiation to be observed. In addition the optical payload needs to be light-weighted for launcher mass constrains. Within the project JEUMICO, an acronym for “Joint European Mirror Competence”, the Aschaffenburg University of Applied Sciences and the Czech Technical University in Prague started a collaboration to develop mirrors for X-ray telescopes. The X-ray telescopes currently developed within this Bavarian- Czech project are of Lobster eye type optical design. Corresponding mirror segments use substrates of flat silicon wafers which are coated with thin iridium films, as this material is promising high reflectivity in the X-ray range of interest. The deposition of the iridium films is based on a magnetron sputtering process. Sputtering with different parameters, especially by variation of the argon gas pressure, leads to iridium films with different properties. In addition to investigations of the uncoated mirror substrates the achieved surface roughness has been studied. Occasional delamination of the iridium films due to high stress levels is prevented by chromium sublayers. Thereby the sputtering parameters are optimized in the context of the expected reflectivity of the coated X-ray mirrors. In near future measurements of the assembled mirror modules optical performances are planned at an X-ray test facility. KW - X-ray KW - iridium KW - mirror KW - lightweight optic KW - Lobster Eye KW - Iridium KW - Röntgenastronomie KW - Spiegelteleskop Y1 - 2017 U6 - https://doi.org/10.1117/12.2265931 VL - 2017 IS - 10235 SP - 1023504-1 EP - 1023504-8 PB - SPIE International Society for Optics and Photonics CY - Bellingham WA ER - TY - CHAP A1 - Stehlikova, Veronika A1 - Urban, Martin A1 - Nentvich, Ondrej A1 - Inneman, Adolf A1 - Döhring, Thorsten A1 - Probst, Anne-Catherine ED - Hudec, Rene T1 - Study of lobster eye optics with iridium coated X-ray mirrors for a rocket experiment T2 - Proceedings of the International Society for Optics and Photonics (SPIE) N2 - In the field of astronomical X-ray telescopes, different types of optics based on grazing incidence mirrors can be used. This contribution describes the special design of a lobster-eye optics in Schmidt's arrangement, which uses dual reflection to increase the collecting area. The individual mirrors of this wide-field telescope are made of at silicon wafers coated with reflecting iridium layers. This iridium coatings have some advantages compared to more common gold layers as is shown in corresponding simulations. The iridium coating process for the X-ray mirrors was developed within a cooperation of the Aschaffenburg University of Applied Sciences and the Czech Technical University in Prague. Different mirror parameters essential for a proper function of the X-ray optics, like the surface microroughness and the problematic of a good adhesion quality of the coatings were studied. After integration of the individual mirrors into the final lobster-eye optics and the corresponding space qualification testing it is planned to fly the telescope in a recently proposed NASA rocket experiment. KW - Lobster Eye KW - Iridium KW - mirror KW - coating KW - Iridium KW - Spiegelteleskop KW - optische Schicht Y1 - 2017 U6 - https://doi.org/10.1117/12.2265769 VL - 2017 IS - 10235 SP - 1023505-1 EP - 1023505-7 PB - SPIE International Society for Optics and Photonics CY - Bellingham WA ER - TY - GEN A1 - Hudec, Rene A1 - Pina, Ladislav A1 - Marsikova, Veronika A1 - Inneman, Adolf A1 - Döhring, Thorsten ED - Deutsche Gesellschaft für angewandte Optik, T1 - Kirkpatrick Baez X-ray Optics for Astrophysics: Recent Status N2 - X-ray optics in KB (Kirkpatrick Baez) arrangement represent promising alternative to Wolter optics in common use. We will present some new results including KB module developed and tested in X-rays within the EU AHEAD project. N2 - Poster KW - X-ray KW - telescope KW - astrophysics KW - Röntgenteleskop Y1 - 2018 UR - https://www.dgao-proceedings.de/download/119/119_p22.pdf SP - 1 EP - 1 ER - TY - GEN A1 - Hudec, Rene A1 - Pina, Ladislav A1 - Marsikova, Veronika A1 - Inneman, Adolf A1 - Döhring, Thorsten ED - Deutsche Gesellschaft für angewandte Optik, T1 - Lobster Eye X-ray Optics for Astrophysics: Recent Status N2 - X-ray optics in LE (Lobster Eye) arrangement represent important part of future X-ray wide field telescopes and monitors. We will present some new results in the design, development, tests and applications of LE X-ray optics with emphasis on astrophysics. N2 - Poster KW - X-ray KW - telescope KW - astrophysics KW - Röntgenteleskop Y1 - 2018 UR - https://www.dgao-proceedings.de/download/119/119_p23.pdf SP - 1 EP - 1 ER - TY - CHAP A1 - Stehlikova, Veronika A1 - Döhring, Thorsten A1 - Stollenwerk, Manfred A1 - Stadtmüller, Johannes A1 - Marsikova, Veronika A1 - Hudec, Rene A1 - Flachs, Dennis A1 - Burwitz, Vadim A1 - Hartner, Gisela A1 - Rukdee, Surangkhana A1 - Müller, Thomas A1 - Schmidt, Thomas A1 - Inneman, Adolf A1 - Klementova, Mariana A1 - Zeising, Sebastian A1 - Langmeier, Andreas T1 - Lobster eye type X-ray telescope with chromium-iridium coated tri-layer mirrors T2 - Proceedings of SPIE N2 - For space-born astronomical X-ray telescopes, iridium-based reflective layer systems are known as highly effective mirrors coatings. During the recent years, Aschaffenburg University of Applied Sciences and the Czech Technical University in Prague jointly developed stress compensated chromium-iridium coatings for this application. To overcome the disturbing reflectivity reduction of the iridium absorption edge around 2 keV photon energy, thin overcoat layers of chromium were applied in addition. Now a prototype of a wide-field, imaging X-ray telescope of Lobster Eye type is assembled at the company RIGAKU. For this purpose a small series of 34 mirrors based on 100 x 50 mm semiconductor grade silicon substrates has been coated at Aschaffenburg University. The applied tri-layer system consists of a stack of 40 nm chromium, which act as adhesive layer and compensates layer stress, a 30 nm iridium thick reflective layer, and an additional overcoat layer of 6 nm chromium. This layer system have been analysed by AFM and TEM images. The mirrors are assembled into an aluminium frame to build a 2D Lobster Eye type telescope. The designed focal length of this wide field X-ray telescope is two meter. To study the performance of the tri-layer coating system, a twin LE telescope with convenient gold coatings was manufactured also. Performance measurements of both telescopes and under same conditions are planned at the PANTER test facility at the Max-Planck Institute for Extraterrestrial Physics. First experimental results, their comparison with theoretical simulations and the comparison between both models will be presented in this contribution. KW - telescope KW - Lobster Eye KW - X-ray KW - mirror KW - iridium KW - Röntgenteleskop KW - Röntgenspiegel Y1 - 2021 U6 - https://doi.org/https://doi.org/10.1117/12.2589266 VL - 2021 IS - 11776 SP - 1177605-1 EP - 1177605-8 PB - SPIE ER -