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Proceedings Paper

Low-vibration high-cooling power 2-stage cryocoolers for ground-based astronomical instrumentation
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Paper Abstract

This paper describes the outcome of a survey reviewing commercially available state-of-the-art high-cooling power 2- stage cryocooler systems for a potential use in powerful scientific instruments for ground-based astronomy. We present the development of a dedicated test-bed as well as vibration and performance measurements on different 2-stage refrigerator systems. As a result of this investigation program, one system was selected as ESO's new standard 20 K closed cycle cooler offering substantial advantages in flexibility and orientation insensitivity along with best compromise for a low vibration device with high cooling power. The new cryocooler type was integrated with VLT instrumentation. A concept for a comprehensive vibration test program at VLT is presented in order to define admissible vibration spectra for future instrumentation.

Paper Details

Date Published: 6 August 2010
PDF: 12 pages
Proc. SPIE 7733, Ground-based and Airborne Telescopes III, 77333V (6 August 2010); doi: 10.1117/12.856233
Show Author Affiliations
Gerd Jakob, European Organisation for Astronomical Research in the Southern Hemisphere (Germany)
Jean-Louis Lizon, European Organisation for Astronomical Research in the Southern Hemisphere (Germany)

Published in SPIE Proceedings Vol. 7733:
Ground-based and Airborne Telescopes III
Larry M. Stepp; Roberto Gilmozzi; Helen J. Hall, Editor(s)

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