Cryogenic mechanical design: SPIROU spectrograph
| Autor: | David Loop, Les Saddlemyer, Simon Thibault, Vlad Reshetov, Glen Herriot, Pierre Desaulniers |
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| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Cryostat
Radial velocity Materials science Modelica Design Cryogenics Thermal budget Astronomy Opto-mechanical design Mechanical engineering Thermodynamic stability Thermal control Optics Mechanical design Spectrographs Thermal Thermal stability Thermal analysis Spectrograph Optical Mounts Spectropolarimeters Optical Bench business.industry Near-infrared spectroscopy Thermoanalysis Thermomechanical stability Infrared spectrographs business Instruments Thermal designs Multi-domain modeling |
| DOI: | 10.1117/12.927442 |
| Popis: | This paper presents an overview of the PDR level mechanical and opto-mechanical design of the cryogenic spectrograph unit of the nIR spectropolarimeter (SPIROU) proposed as a new-generation instrument for CFHT. The design is driven by the need for high thermo-mechanical stability in terms of the radial velocity (RV) of 1 m/s during one night, with the requirement for thermal stability set at 1 mK/24 hours. This paper describes stress-free design of the cryogenic optical mounts, mechanical design of the custom-build cryostat, mechanical design of the optical bench, and thermal design for 1 mK thermal stability. The thermal budget was calculated using lumped-mass model thermal analysis, implemented in Modelica multi-domain modeling language. Discussion of thermal control options to achieve 1 mK thermal stability is included. © 2012 SPIE. Ground-Based and Airborne Instrumentation for Astronomy IV, July 1-6, 2012, Amsterdam, The Netherlands Series: Proceedings of SPIE; no. 8446 |
| Databáze: | OpenAIRE |
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