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http://hdl.handle.net/20.500.12386/33200
Titolo: | Solar radiation effects on the Sardinia Radio Telescope performances | Autori: | ATTOLI, Alessandro POPPI, Sergio BUFFA, Franco Cazzani, Antonio FARA, Antonietta Angela Rita FIERRO, Davide GAUDIOMONTE, Francesco MARONGIU, Pasqualino PILI, Mauro PISANU, Tonino Sanna, Giannina GSerra, iampaolo Stochino, Flavio VARGIU, GIAN PAOLO |
Data pubblicazione: | 2022 | Titolo del volume in cui è pubblicato il poster: | Ground-based and Airborne Telescopes IX | Curatore/i del volume in cui è pubblicato il contributo: | Marshall, Heather K.; Spyromilio, Jason; Usuda, Tomonori | Serie: | PROCEEDINGS OF SPIE | Numero: | 12182 | Da pagina:: | 2 | Abstract: | The Sardinia Radio Telescope, a 64-metre diameter fully steerable radio telescope operated by INAF, will be upgraded in order to extend its current operating frequency range 0.3-26.5 GHz up to 116 GHz, thanks to a National Operational Program (PON) funding assigned to INAF by the Italian Ministry of University and Research. The PON project is organized in nine Work Packages, one of which is dedicated to the accomplishment of a sophisticated metrology system designed to monitor the cause of the pointing errors and the reflector surface deformations. The entire antenna structure will therefore be equipped with a network of sensors, like thermal sensors, inclinometers, accelerometers, collimators, anemometers, strain gauges and others, to study environmental stresses and how they affect the SRT performances. This work is devoted to the investigation of the thermal stress effects produced by solar radiation. In particular, two analyses are carried out to confirm the relevance of a thorough temperature monitoring system, both conducted using Finite Element Analysis. First, a possible approach for the simulation of realistic thermal scenarios due to insolation is proposed and the effects on the pointing accuracy are analysed. Second, a feasible method to study the impacts that a differential heating of the Back Up Structure (BUS) produces on the radio telescope main reflector surface is presented. Finally, these effects are analysed as optical aberrations and modelled in terms of Zernike polynomials. | Titolo del convegno: | Astronomical Telescopes + Instrumentation | Luogo del convegno: | Montréal, Québec, Canada | Periodo del convegno: | 17-23 July, 2022 | URI: | http://hdl.handle.net/20.500.12386/33200 | URL: | https://lens.org/130-753-553-037-912 https://www.spiedigitallibrary.org/conference-proceedings-of-spie/12182/2628977/Solar-radiation-effects-on-the-Sardinia-Radio-Telescope-performances/10.1117/12.2628977.full |
ISSN: | 0277-786X | ISBN: | 9781510653450 9781510653467 |
DOI: | 10.1117/12.2628977 | Bibcode ADS: | 2022SPIE12182E..03A | Fulltext: | open |
È visualizzato nelle collezioni: | 3.01 Contributi in Atti di convegno |
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