Design of a Superconducting Magnet for Lorentz Force Electrical Impedance Tomography

B Shen, L Fu, J Geng, H Zhang, X Zhang, Z Zhong, Z Huang, TA Coombs

OAI: oai:www.repository.cam.ac.uk:1810/267262 • DOI: 10.17863/CAM.13264

This paper presents the design and modeling of a second-generation (2G) high-temperature superconducting (HTS) magnet, which is suitable for Lorentz force electrical impedance tomography (LFEIT). The concept of constructing a superconducting magnet using the configuration of a Halbach array is proposed, which can achieve a favorable thin geometry for the LFEIT system, and is able to build a homogeneous magnetic field with high intensity. The modeling of this superconducting Halbach array magnet has been executed by COMSOL Multiphysics. H-formulation together with B-dependent critical current density and bulk approximation are used as the basic tools for modeling. Results reveal that this magnet can achieve over 1-T magnetic field in the cross section required. The optimization of HTS coils' location and different numbers of coils are carried out to balance the strength and homogeneity of magnetic field.

arrays high-temperature superconductors magnetic fields Magnetic Resonance Imaging superconducting coils superconducting magnets