Main Characteristics Of The Giano Cryostat And Its Cooling System

GIANO is a cryogenic cross-dispersed spectrometer whose optics consist of aspheric aluminium mirrors, glass flats, cross-dispersing prisms and a grating fixed onto a >1.5 x 1.0 metres aluminium bench. The primary aim of the project is to achieve the highest possible image quality and spectral stability essential for precise radial velocity measurements. The instrument also includes other observing modes which are obtained by inserting a flat mirror or a prism at different positions in the optical path.This flexibility is achieved without affecting the stability and performances of the primary, high resolution mode.