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Proceedings Paper

The LINC-NIRVANA IR cryostat
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Paper Abstract

The MPIA is leading an international consortium of institutes building an instrument called LINC-NIRVANA. The instrument will combine the light from the two 8.4 m primary mirrors of the LBT. The beam combiner will operate at wavelengths between 1.1 and 2.4 microns, using a Hawaii2 detector. A volume of about 1.6 m high with a diameter of about 0.65 m is required for the cold optics. The size of the instrument and the high requirements on vibrations brought us to a new approach for the cooling of the cryostat, which has never been tried in astronomy. The cryostat will be cooled by a flow of Helium gas. The cooler which cools the gas will be placed far away on a different level in the telescope building. The cold helium will be fed through long vacuum isolated transfer lines to the instrument cryostat. Inside the cryostat a tube will be wrapped around the mounting structure of the cold optics. The first hardware arrived at the MPIA in 2005 and the system will soon be tested in our labs.

Paper Details

Date Published: 28 June 2006
PDF: 8 pages
Proc. SPIE 6269, Ground-based and Airborne Instrumentation for Astronomy, 626956 (28 June 2006); doi: 10.1117/12.671642
Show Author Affiliations
W. Laun, Max Planck Institut für Astronomie (Germany)
H. Baumeister, Max Planck Institut für Astronomie (Germany)
P. Bizenberger, Max Planck Institut für Astronomie (Germany)

Published in SPIE Proceedings Vol. 6269:
Ground-based and Airborne Instrumentation for Astronomy
Ian S. McLean; Masanori Iye, Editor(s)

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