A miniature dilution refrigerator for sub-kelvin detector arrays

Gustav Teleberg, Simon T. Chase, Lucio Piccirillo

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    Abstract

    We describe a miniature dilution refrigerator (MDR). operated in continuous mode and suitable for many detector applications at temperatures down to 50mK. It distinguishes itself from other refrigerators in that it is self-contained and benefits from an internal cycle of the 3He gas. As a result, no external gas handling system is required so size, weight and complexity of the system is dramatically decreased. The system has no fine capillaries, moving parts or cooled O-rings. It is therefore mechanically very reliable, has no risk of blockages and is unlikely to develop cryogenic leaks. One direct application is balloon-borne or ground-based observations of the CMB using large detector arrays, When these experiments are operated remotely on platforms or at sites with limited infrastructure and maintenance support, a compact and reliable dilution refrigerator becomes essential. We describe a complete system incorporating an MDR which we have built and integrated with a pulse-tube refrigerator to achieve a cooling power of several micro Watt at 100mK. This system is being developed for a CMB polarization experiment (CLOVER) which requires three independent cryostats to cool large TES detector arrays.
    Original languageEnglish
    Title of host publicationProceedings of SPIE - The International Society for Optical Engineering|Proc SPIE Int Soc Opt Eng
    Volume6275
    DOIs
    Publication statusPublished - 2006
    EventMillimeter and Submillimeter Detectors and Instrumentation for Astronomy III - Orlando, FL
    Duration: 1 Jul 2006 → …

    Conference

    ConferenceMillimeter and Submillimeter Detectors and Instrumentation for Astronomy III
    CityOrlando, FL
    Period1/07/06 → …

    Keywords

    • Astronomy instrumentation
    • Cryogenics
    • Dilution refrigerators
    • Sorption coolers

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