120 Hz pulse tube cryocooler for fast cooldown to 50 K

Srinivas Vanapalli, Michal Lewis, Zhihua Gan, Ray Radebaugh

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    A pulse tube cryocooler operating at 120 Hz with 3.5 MPa average pressure achieved a no-load temperature of about 49.9 K and a cooldown time to 80 K of 5.5 min. The net refrigeration power at 80 K was 3.35 W with an efficiency of 19.7% of Carnot when referred to input pressure-volume (PV or acoustic) power. Such low temperatures have not been previously achieved for operating frequencies above 100 Hz. The high frequency operation leads to reduced cryocooler volume for a given refrigeration power, which is important to many applications and can enable development of microcryocoolers for microelectromechanical system applications
    Original languageUndefined
    Article number10.1063/1.2643073
    Pages (from-to)072504-3
    Number of pages3
    JournalApplied physics letters
    Issue number2
    Publication statusPublished - 12 Feb 2007


    • METIS-242070
    • EWI-9523
    • IR-67010

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