Robert J. Deissler1, Tanvir Baig1, Charles R. Poole1, David Doll2, Michael Tomsic2, and Michael A. Martens1
1Department of Physics, Case Western Reserve University, Cleveland, OH, United States, 2Hyper Tech Research Inc., Columbus, OH, United States
A numerical simulation of the heat equation was
performed for a 10 coil persistent mode 1.5 T MgB2 conduction-cooled
magnet. A hot spot was initialized by allowing a section of wire to become
resistive on one coil. An active
protection system consisting of surface heaters on all the coils was initiated
at 100 mV. Using a standard wire, the temperature was found to reach nearly 300
K, which may damage the coil. By increasing the amount of copper, using Glidcop
instead of Monel, or increasing the thermal conductivity of the insulation, the
temperature is kept within safe limits.
