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Cryogenics for ground based and space-borne instrumentation

Published online by Cambridge University Press:  11 June 2009

P. Kern  and
L. Duband
L. Duband*
Affiliation:
CEA, Irfu, SPP, Service des Basses Températures, Institut Nanosciences et Cryognie CEA, Grenoble, 17 rue des Martyrs, 38054 Grenoble, France
*
[email protected]
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Abstract

In many space sciences project cryogenic detectors are essential for the accomplishment of the scientific objectives, offering unique advantages and unmatched performance. In addition several other components such as the optics can benefit from a cryogenic cooling which reduces the radiative loading. The Service des Basses Températ- ures (SBT) of CEA Grenoble has been involved in space cryogenics for over 20 years now and features a dedicated laboratory, the Cryocoolers and Space Cryogenics group. Various cryocoolers have been developed in the past and our fields of activity focus now on four main technologies: sorption coolers, multistage pulse tubes, adiabatic demagnetization refrigerators (ADR), and cryogenic loop heat pipes. In addition work on two new concepts for ground based dilution refrigerators is also ongoing. Finally developments on various key technologies such as the heat switches, the suspension or structural systems are also carried out. These developments are mainly funded by the European Space Agency (ESA) or by the Centre National d'Études Spatiales (CNES).In this paper we mostly give an overview of the developments carried out at SBT along with several examples of other relevant systems. We use space cryogenics as a thread. However these coolers or techniques can be used on ground, particularly on remote locations where liquid cryogen are unavailable and/or where maintenance must be limited to a strict minimum. In this case they can be simplified and take advantage of on ground resources, and their cost can be significantly reduced. For most of these systems the common feature is the absence of any moving parts or any friction, which guarantees a very good reliability and make them very good candidates for space borne instruments requiring cryogenic temperatures.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 37: Astrophysics Detector Workshop 2008 , 2009 , pp. 3 - 18
Copyright
© EAS, EDP Sciences, 2009

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References

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