120Hz pulse tube cryocooler for fast cooldown to 50K
S Vanapalli, M Lewis, Z Gan, R Radebaugh - Applied physics letters, 2007 - pubs.aip.org
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 …
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 …
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