Entity

Time filter

Source Type

United Kingdom

Wang C.,CAS Institute of Electrical Engineering | Wang C.,Academy of Armored force Engineering | Chang T.,Academy of Armored force Engineering | Rong M.,Academy of Armored force Engineering | And 4 more authors.
IEEE Transactions on Applied Superconductivity | Year: 2011

An optimal design method for high-field MRI magnet is put forward. The design procedure can be divided into two steps. First step is to design a set of coils to achieve the necessary center field, which is called the background field, and it is based on the optimal algorithm of minimum volume consumption by SQP. During the optimization, the safety factor of superconducting wires has been considered. The second step is to design a set of correction coils to achieve the necessary homogeneity, and the magnetic field produced by previous coilsis set as background field, then optimize the homogeneity based on the nonlinear Least Square Method. © 2010 IEEE. Source


Wang C.,CAS Institute of Electrical Engineering | Wang C.,Academy of Armored force Engineering | Wang Q.,Applied Superconductor | Zhang Q.,CAS Institute of Electrical Engineering
IEEE Transactions on Applied Superconductivity | Year: 2010

A design method of multiple layers superconducting magnet for MRI is introduced. Considering the actual coils layout, the candidate domain is divided into several layers. The current density curves of each layer are solved by Quadratic Programming optimization with Minimum Stored Energy. The seed coils are arranged at the peak positions of current curves. Based on the regularization solution, the current of the seed coils can be solved. According to the coil's current, selecting the current density of the superconducting wires, the original sections for the coils can be obtained. Then a further optimization about the homogeneity based on constrained nonlinear multivariable optimization method is employed to determine the final coils' geometries. The method is especially suitable for short superconducting MRI magnet design. © 2006 IEEE. Source


Discover hidden collaborations