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http://hdl.handle.net/20.500.12386/25226
Title: | Radiation, Thermal Gradient and Weight: a threefold dilemma for PLATO | Authors: | MAGRIN, DEMETRIO RAGAZZONI, Roberto Bruno, Giordano Piazza, Daniele BORSA, Francesco GHIGO, Mauro Mogulsky, Valery BERGOMI, Maria BIONDI, FEDERICO CHINELLATO, SIMONETTA DIMA, MARCO FARINATO, JACOPO GREGGIO, DAVIDE GULLIEUSZIK, MARCO MARAFATTO, Luca VIOTTO, VALENTINA MUNARI, MATTEO PAGANO, Isabella SICILIA, Daniela BASSO, Stefano SPIGA, Daniele Bandy, Timothy Brändli, Mathias Benz, Willy De Roche, Thierry Rieder, Martin Brandeker, Alexis Klebor, Maximilian Schweitzer, Mario Wieser, Matthias Erikson, Anders Rauer, Heike |
Issue Date: | 2016 | Volume: | Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave | Editors: | MacEwen, Howard A.; Fazio, Giovanni G.; Lystrup, Makenzie | Series: | PROCEEDINGS OF SPIE | Number: | 9904 | First Page: | 990430 | Abstract: | The project PLAnetary Transits and Oscillations of stars (PLATO) is one of the selected medium class (M class) missions in the framework of the ESA Cosmic Vision 2015-2025 program. The mean scientific goal of PLATO is the discovery and study of extrasolar planetary systems by means of planetary transits detection. The opto mechanical subsystem of the payload is made of 32 normal telescope optical units (N-TOUs) and 2 fast telescope optical units (FTOUs). The optical configuration of each TOU is an all refractive design based on six properly optimized lenses. In the current baseline, in front of each TOU a Suprasil window is foreseen. The main purposes of the entrance window are to shield the following lenses from possible damaging high energy radiation and to mitigate the thermal gradient that the first optical element will experience during the launch from ground to space environment. In contrast, the presence of the window increases the overall mass by a non-negligible quantity. We describe here the radiation and thermal analysis and their impact on the quality and risks assessment, summarizing the trade-off process with pro and cons on having or dropping the entrance window in the optical train. | Conference Name: | Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave | Conference Place: | Edinburgh, UK | Conference Date: | 26 June-1 July, 2016 | URI: | http://hdl.handle.net/20.500.12386/25226 | URL: | https://www.spiedigitallibrary.org/conference-proceedings-of-spie/9904/1/Radiation-Thermal-Gradient-and-Weight--a-threefold-dilemma-for/10.1117/12.2232579.full | ISSN: | 0277-786X | ISBN: | 9781510601871 | DOI: | 10.1117/12.2232579 | Bibcode ADS: | 2016SPIE.9904E..30M | Fulltext: | open |
Appears in Collections: | 3.01 Contributi in Atti di convegno |
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