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Estimation of Heat Generation in Multi-Contact Connector for Superconducting Magnet Application  

Kim, M.S. (Korea Basic Science Institute)
Choi, Y.S. (Korea Basic Science Institute)
Kim, D.L. (Korea Basic Science Institute)
Lee, Y.A. (Korea Basic Science Institute)
Publication Information
Progress in Superconductivity / v.14, no.2, 2012 , pp. 122-127 More about this Journal
Abstract
Current leads are one of the important components for carrying the current to the coil in the superconducting magnet system. Heat leakage through the current lead is the major factor of entire heat load in the cryogenic system because current leads carry the current from room temperature to near 4 K, connecting thermally each other. Therefore, minimization heat load through current lead can reduce the operating temperature of superconducting magnet. The semi-retractable current lead, composed of multi-contact connector and HTS element, is one of good options. Comprehension of Multi-contact connector's structure, contact resistance and heat generation is essential for estimating heat generation in current leads. Multi-contact connector has several louvers inside of socket and the shape, number, size of louvers are different with the size of connector. Therefore contact area, current path and contact resistance are also different. In this study, the contact resistance in multi-contact connector is measured using the electrical power as a function of connector's size and temperature. Also, the unique correlation of electrical contact resistance is derived and heat generation is estimated for superconducting magnet application.
Keywords
Current lead; multi-contact connector; superconducting magnet;
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