Transient eddy current effects

Adnan Trakic 
Phone: 51181
Office: 78-523

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Most magnetic resonance imaging (MRI) spatial encoding techniques employ low-frequency pulsed magnetic field gradients that undesirably induce multi-exponentially decaying eddy currents in nearby conducting structures of the MRI system. The eddy currents degrade the switching performance of the gradient system, distort the MRI image, and introduce thermal loads in the cryostat vessel and superconducting MRI components. Heating of superconducting magnets due to induced eddy currents is particularly problematic as it offsets the superconducting operating point, which can cause a system quench. A numerical characterization of transient eddy current effects is vital for their compensation/ control and further advancement of the MRI technology.

With the aid of numerical solvers, in our research we explore the possibility of including predicted eddy currents in the design process of the gradient coil.

Publications arising from project: