Development of Highly Effective Cooling Technology for a Superconducting Magnet Using Cryogenic OHP

A highly effective cooling technique for a superconducting magnet is proposed by incorporating the cryogenic oscillating heat pipes (OHP) as cooling panels in the coil windings. The OHP is a high performance two-phase heat transfer device, which can transport several orders of magnitude larger heat loads than heat conduction of solids. The cryogenic OHP using , Ne, and as working fluids have been developed and tested at the operating temperature ranges of 17-25 K (H 2 ), 26-32 K (Ne), and 67-80 K (N 2 ). The measured effective thermal conductivities were reached to 500-3,000 W/m · K (H 2 ), 1,000-8,000 W/m · (Ne) and 10,000-18,000 W/m · K (N 2 ). The high thermal transport properties of the cryogenic OHP and its application as the cooling components of superconducting magnets are also discussed.