A 2k-He Hybrid Cryostat With 5 Days Holdtime For A 690 GHz InSb-bolometer

E. E. M. Woestenburg; J. L . Casse

doi:10.1117/12.952342

21 April 1986 A 2ℓ-He Hybrid Cryostat With 5 Days Holdtime For A 690 GHz InSb-bolometer

E. E. M. Woestenburg, J. L . Casse

Proceedings Volume 0598, Instrumentation for Submillimeter Spectroscopy; (1986) https://doi.org/10.1117/12.952342
Event: 1985 International Technical Symposium/Europe, 1985, Cannes, France

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.

Citation Download Citation

E. E. M. Woestenburg and J. L . Casse "A 2ℓ-He Hybrid Cryostat With 5 Days Holdtime For A 690 GHz InSb-bolometer", Proc. SPIE 0598, Instrumentation for Submillimeter Spectroscopy, (21 April 1986); https://doi.org/10.1117/12.952342

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