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Proceedings Paper

Performances of the cryogenic system of GIANO-TNG
Author(s): I. Mochi; E. Oliva; L. Origlia; C. Baffa; V. Biliotti; G. Falcini; E. Giani; M. Gonzalez; E. Rossetti; M. Sozzi; M. Liffredo; G. Roveta; L. Roccia
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Paper Abstract

GIANO-TNG is a cryogenic high resolution infrared spectrometer whose optics include large aspheric mirrors and cross-dispersing prisms mounted over a ≃1.5 m2 aluminum bench. To achieve the highest possible spectral stability and repeatability the bench is internally filled with liquid nitrogen whose boil-off pressure is actively controlled and stabilized to a fraction of mbar. The bench is isostatically mounted inside a ≃2.5 m3 cryostat. We present the characteristics and performances of the cryogenic system of GIANO which include, in particular, a temperature uniformity and long-term stability of a few mK and a remarkably low consumption of liquid nitrogen (less than 1 liter/hr).

Paper Details

Date Published: 11 July 2008
PDF: 4 pages
Proc. SPIE 7014, Ground-based and Airborne Instrumentation for Astronomy II, 70143U (11 July 2008); doi: 10.1117/12.788241
Show Author Affiliations
I. Mochi, INAF - Osservatorio Astrofisico di Arcetri (Italy)
E. Oliva, INAF - Osservatorio Astrofisico di Arcetri (Italy)
Telescopio Nazionale Galileo (Italy)
L. Origlia, INAF - Osservatorio Astronomico di Bologna (Italy)
C. Baffa, INAF - Osservatorio Astrofisico di Arcetri (Italy)
V. Biliotti, INAF - Osservatorio Astrofisico di Arcetri (Italy)
G. Falcini, INAF - Osservatorio Astrofisico di Arcetri (Italy)
E. Giani, INAF - Osservatorio Astrofisico di Arcetri (Italy)
M. Gonzalez, Telescopio Nazionale Galileo (Italy)
E. Rossetti, INAF - Osservatorio Astronomico di Bologna (Italy)
M. Sozzi, INAF - Osservatorio Astrofisico di Arcetri (Italy)
M. Liffredo, Criotec Impianti s.r.l. (Italy)
G. Roveta, Criotec Impianti s.r.l. (Italy)
L. Roccia, Omicron Sistemi (Italy)


Published in SPIE Proceedings Vol. 7014:
Ground-based and Airborne Instrumentation for Astronomy II
Ian S. McLean; Mark M. Casali, Editor(s)

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