SPIRou : specific technical developments

Apart from the optical design (and the corresponding thermal background estimate), a number of specific technical developments are required for SPIRou. The main issues are:

identify a technical device providing a stable RV reference;

identify ultra-low birefringence glass for the rhomb retarders and adequate birefringent crystal for the Wollaston with optimal transparency;

modify the GIANO cryogenic bench/tank for the particular case of SPIRou, as required by our optical design;

design/select a compact transmission tip/tilt image stabilisation system to be implemented in the interface module.