Title :
Demountable coaxial gas-cooled current leads for MRI superconducting magnets
Author :
Zhang, C.J. ; Zhou, X.T. ; Yan, L.
Author_Institution :
China Kejian Corp. Ltd., China
fDate :
1/1/1992 12:00:00 AM
Abstract :
To fabricate a demountable current lead for MRI (magnetic resonance imaging) superconducting magnets with less heat loss, the heat transfer equation of a gas-cooled current lead is introduced. The authors discuss the character of demountable coaxial gas-cooled current leads and make careful selection of lead materials. Leads of 250 A for MRI magnets were made and tested. It is concluded that these current leads are adaptable to all kinds of closed-loop superconducting magnets and very convenient to use. The lead is safe to use even when there is no helium gas glow in it
Keywords :
coaxial cables; heat transfer; low-temperature techniques; nuclear magnetic resonance spectroscopy; power cables; superconducting magnets; 250 A; MRI superconducting magnets; closed-loop superconducting magnets; coaxial gas-cooled current leads; demountable current lead; heat loss; heat transfer equation; Coaxial components; Conductors; Cooling; Equations; Heat transfer; Helium; Magnetic resonance imaging; Resistance heating; Superconducting magnets; Thermal conductivity;
Journal_Title :
Magnetics, IEEE Transactions on
