Speaker
Dr
Xihuan Hao
(Advanced Research Systems, Inc.)
Description
High cooling power 4.2 K stage cryocoolers are in high demand, given their broad applications in such fields as magnetic resonance imaging (MRI) and low temperature superconductors. ARS has recently designed and developed a high cooling power 4.2 K stage pneumatic-drive G-M cryocooler which achieves a typical cooling power of 1.8 W/4.2 K. Steady input power of our newly developed helium compressor supplied to the cold head is 11.8 kW at 60 Hz. The operation speed of the cold head is 30 RPM, which is lower than other commercial 4.2 K stage cryocoolers, minimizing vibration of the cold head and extending its lifetime. The effects of geometry and operation conditions on the cooling performance of the 4.2 K stage G-M cryocooler are also numerically simulated and then compared with experimental test results.
Primary author
Dr
Xihuan Hao
(Advanced Research Systems, Inc.)
