Abstract
We report on the design and testing of a cryogen-free superconducting magnet that isconductively cooled by means of a two-stage pulse tube cryocooler (PTC). The coolerprovides a cooling power of 0.4 W at 4.2 K, when operated on a helium compressor with anominal input power of 6 kW. The 5 T NbTi magnet is equipped with a persistent currentswitch with a resistive heater. The thermal coupling between the switch and the 4 K stage ischosen so as to allow operation of the switch without a marked heat input to the 4 K stageduring the charging process. The PTC is capable of cooling the complete magnetsystem to a stationary temperature of 2.7 K, which was found to be stable for aperiod of more than two months. The magnet was charged to a field of 5.5 T, andpersistent mode operation was monitored successfully for a period of three weeks.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
