Title :
Binary Nitrogen-Cooled 10 kA Leads
Author :
Weijers, H.W. ; Gavrilin, A.V. ; Cantrell, K.R. ; Kenney, S.J. ; Miller, G.E.
Author_Institution :
Nat. High Magn. Field Lab., Tallahassee, FL
fDate :
6/1/2008 12:00:00 AM
Abstract :
A pair of binary current leads has been constructed with a nitrogen vapor cooled resistive section and a stainless steel shunted HTS lower section. These leads are intended as replacement leads for the NHMFL 45 T Hybrid and also serve as half-current prototypes for the 20 kA leads foreseen for the Series Connected Hybrids that are under development at the NHMFL. An amount of liquid nitrogen is maintained in a reservoir at the bottom of the resistive section such that vapor flow is determined by self- demand. The liquid nitrogen delivery system and properties of the vapor cooled section of the leads are described. A comparison is made between the measured and calculated properties of the resistive section in steady state and transient conditions.
Keywords :
electrical contacts; high-temperature superconductors; superconducting magnets; binary current leads; binary nitrogen cooled lead; current 10 kA; current leads; high temperature superconductor; liquid nitrogen; nitrogen vapor cooled resistive section; stainless steel shunted; Cryogenics; current leads; nitrogen;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2008.922445
