In recent years, magnesium diboride (MgB2) has been regarded as one of the promising candidates for the development of MRI magnets owing to its critical temperature of 39 K, which allows magnets to be operated without the use of liquid helium (LHe), unlike their low-temperature superconductor counterparts. Prior to the development of the LHe-free MgB2 MRI magnet, it is essential to investigate the appropriate protection scheme for the magnets. Therefore, this study examined passive and active protections for a proto-type MgB2 coil using the MgB2 wires manufactured by Kiswire Advanced Technology Co. Ltd. The quench and recovery characteristics of the MgB2 coil with various protection schemes were evaluated in terms of the maximum hotspot temperature, maximum induced voltage, and recovery time.
Acknowledgement: This work was supported by the Korea Basic Science Institute under Grant D37614.
|Submitters Country||Republic of Korea|