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120Hz Pulse Tube Cryocooler for Fast Cooldown to 50K



Srinivas Vanapalli, Michael A. Lewis, Zhihua Gan, Ray Radebaugh


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 minutes. The net refrigeration power at 80 K was 3.35 W with an efficiency of about 22.6% of Carnot when referred to input PV power. This is the first time such low temperatures have been achieved for operating frequencies above 100 Hz. The high frequency operation leads to reduced cryocooler volume for the same refrigeration power, which is important to many applications and can enable development of microcryocoolers for MEMS applications.
Applied Physics Letters


Cryocoolers, cryogenics, high frequency, MEMS, miniature, pulse tubes, refrigeration, regenerators


Vanapalli, S. , Lewis, M. , Gan, Z. and Radebaugh, R. (2007), 120Hz Pulse Tube Cryocooler for Fast Cooldown to 50K, Applied Physics Letters, [online], (Accessed April 18, 2024)
Created February 12, 2007, Updated October 12, 2021