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Proceedings Paper

A 2k-He Hybrid Cryostat With 5 Days Holdtime For A 690 GHz InSb-bolometer
Author(s): E. E. M. Woestenburg; J. L . Casse
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Paper Abstract

This paper describes the design and construction of a 2k He-cryostat, using a closed cycle refrigerator to cool the cryostat radiation shields. With this configuration a 5 days hold-time has been obtained at 4.2 K. The cryostat is being used to cool a Schottky diode mixer at 350 GHz and an InSb bolometer at 690 GHz to 20 K and 4.2 K (or lower by pumping on the liquid helium) respectively. The heat load on the 4 K cold station has been minimized using a thermal model of the cryostat, partly developed on the basis of measurements on the real cryostat. Much insight in the importance of various heat loads was gained using the model and led to improvements in the original cryostat. This cryostat forms the cryogenic part of the Dutch Common User sub-mm receiver for the United Kingdom Infra Red Telescope (UKIRT) on Mauna Kea, Hawaii.

Paper Details

Date Published: 21 April 1986
PDF: 7 pages
Proc. SPIE 0598, Instrumentation for Submillimeter Spectroscopy, (21 April 1986); doi: 10.1117/12.952342
Show Author Affiliations
E. E. M. Woestenburg, Netherlands Foundation for Radio Astronomy (The Netherlands)
J. L . Casse, Netherlands Foundation for Radio Astronomy (The Netherlands)


Published in SPIE Proceedings Vol. 0598:
Instrumentation for Submillimeter Spectroscopy
Erik L. Kollberg, Editor(s)

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