Abstract #1845
Quench Propagation Study for Magnesium Diboride (MgB2) MRI Magnets
Charles Randall Poole 1 , Tanvir Baig 1 , Robert Deissler 1 , Robert W. Brown 1 , and Michael A Martens 1
1
Department of Physics, Case Western Reserve
University, Cleveland, Ohio, United States
Magnesium diboride (MgB2), a high temperature
superconductor, has been considered for use in
conduction cooled MRI magnets to reduce the usage of
liquid helium. Compared to NbTi wires the thermal normal
zone propagation (NZP) in MgB2 is much slower leading to
active quench protection designs. The NZP and the
temperature rise in the coil were modeled using the
Douglas-Gunn method to solve the 3D heat equation for
wire with copper percentages varying from 15% to 50%. It
was determined that wire with higher percentage of
copper is more advantageous for quench protection due to
the slower rise in maximum temperature.
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