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Proceedings Paper

Supercritical helium dewar for the Infrared Background Signature Survey experiment
Author(s): Gunther Pulkert; Guenter Lange; H. Lieb; Albert Seidel
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Paper Abstract

A superfluid helium dewar design for operation under supercritical conditions is described. The dewar consists of a 300 1 volume cylinder toroidal tank suspended from the vacuum shell by preloaded GFC chains. Three ventgas cooled radiation shields surround the tank. The optics is mounted to a flange at the He tank being conductively cooled. The optics temperature is allowed to float with the tank temperature going from 4.8 to 10 K while holding the tank pressure constant at 2.8 bar. The focal planes of the IR sensor are actively heated and held at a constant temperature of 10.5 and 14.2 K.

Paper Details

Date Published: 1 November 1990
PDF: 11 pages
Proc. SPIE 1340, Cryogenic Optical Systems and Instruments IV, (1 November 1990);
Show Author Affiliations
Gunther Pulkert, Messerschmitt-Boelkow-Blohm GmbH (Germany)
Guenter Lange, Messerschmitt-Boelkow-Blohm GmbH (Germany)
H. Lieb, Messerschmitt-Boelkow-Blohm GmbH (Germany)
Albert Seidel, Messerschmitt-Boelkow-Blohm GmbH (Germany)

Published in SPIE Proceedings Vol. 1340:
Cryogenic Optical Systems and Instruments IV
Ramsey K. Melugin; Gerald R. Pruitt, Editor(s)

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