24 September 2012 Cryogenic mechanical design: SPIROU spectrograph
Author Affiliations +
Abstract
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) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Vlad Reshetov, Vlad Reshetov, Glen Herriot, Glen Herriot, Simon Thibault, Simon Thibault, Pierre Désaulniers, Pierre Désaulniers, Les Saddlemyer, Les Saddlemyer, David Loop, David Loop, } "Cryogenic mechanical design: SPIROU spectrograph", Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 84464E (24 September 2012); doi: 10.1117/12.927442; https://doi.org/10.1117/12.927442
PROCEEDINGS
9 PAGES


SHARE
Back to Top