Abstract Double stage pulse tube crycoolers (PTC) capable of lifting about 0.5W of cooling power at 4K are commercially available. Single stage 3He and 3He sorption coolers have been developed for both ground and space applications. A precooling temperature below 2.5K is required to operate a sorption cooler efficiently. This is commonly achieved with a pumped liquid 3He bath. However for some applications (for example bolometers cooling in astrophysics) the vibrations induced by the pumping system are problematic. In addition the fraction of liquid lost during the bath pump down significantly affects the bath hold time. To overcome this difficulty, a double stage (4He/3He) sorption cooler has been developed by CEA/SBT that can be operated either from an atmospheric 3He bath or from a 4K PTC, and which provides temperature down to 260 mK. This paper presents the performance obtained with such a double stage sorption cooler using a 4 K CRYOMECH PT405 Pulse tube for precooling. A similar approach is under development with a dilution fridge being coupled with a 4K pulse tube.


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    Title :

    Sub-Kelvin Mechanical Coolers


    Contributors:
    Ravex, A. (author) / Hernandez, P. (author) / Duband, L. (author)

    Published in:

    Publication date :

    2003-01-01


    Size :

    5 pages




    Type of media :

    Article/Chapter (Book)


    Type of material :

    Electronic Resource


    Language :

    English




    Sub-Kelvin Mechanical Coolers

    Ravex, A. / Hernandez, P. / Duband, L. | British Library Conference Proceedings | 2003


    Sub-Kelvin Sorption Coolers for Space Application

    Duband, L. / Collaudin, B. / Jamotton, P. | Springer Verlag | 2002


    Sub-Kelvin Sorption Coolers for Space Application

    Duband, L. / Collaudin, B. / Jamotton, P. | British Library Conference Proceedings | 2001