27 September 2011 Effects of a traveling magnetic field on vertical gradient freeze growth of cadmium zinc telluride
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Abstract
The effects of a traveling magnetic field (TMF) on vertical gradient freeze (VGF) growth of cadmium zinc telluride (CZT) are studied using a coupled model of magnetic induction, fluid dynamics, and heat transfer. Simulations are performed to determine the influences of current and frequency on melt flow and growth interface shape. A downward traveling electromagnetic wave drives flow downward at the wall, which tends to flatten the interface, whereas an upward traveling wave has the opposite effect. TMF makes a significant impact on interface shape in the absence of thermal buoyancy, but is ineffectual under realistic conditions in a 4 inch diameter ampoule, for which buoyancy dominates Lorentz force throughout the melt.
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Andrew Yeckel, Andrew Yeckel, Jeffrey J. Derby, Jeffrey J. Derby, } "Effects of a traveling magnetic field on vertical gradient freeze growth of cadmium zinc telluride", Proc. SPIE 8142, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XIII, 814214 (27 September 2011); doi: 10.1117/12.896543; https://doi.org/10.1117/12.896543
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