Use of FEM in the Design of an HTS Insert Coil for a High Field NMR Magnet
High temperature superconductors (HTS) allow larger current densities through coil wound electromagnets, which produce higher magnetic fields. A high field HTS insert demonstration magnet is being built with high field homogeneity (~1 ppm) for application in nuclear magnetic resonance (NMR). The HTS NMR system is inserted into the bore of an existing high field magnet. A compensating Helmholtz coil pair is placed around the central solenoid to flatten the magnetic field profile.
A virtual field map of the thermally strained insert was modeled with the Moving Mesh, Thermal Stress, and Magnetic Field interfaces. The HTS insert was then redesigned to more appropriately account for these effects. Additionally, a material selection process investigated mandrel magnetization and its effect on the field homogeneity.
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