A New Target Field Method for Optimizing Longitudinal Gradient Coils Property
A new approach has been presented in the paper to optimize the longitudinal gradient coil performance. First, traditional spherical harmonic target field method is deduced, the relation between the magnetic field and the current distribution is described by a matrix equation. Then, simulated annealing method is introduced to the optimization procedure, and those high order coefficients which are used to vanish become the variables designed for optimization. Finally, stream function method is used to transform the current density into discrete gradient coils. Comparison between traditional method and the optimized method shows that the inhomogeneity in the region of interest can be reduced from 13.59％ to 4.9％, the coil efficiency is increased from 11.56mT/m/A to 18.07 mT/m/A, and the minimum distance of the discrete current wire is raised from 0.95mm to 2.02 mm.
Feng Qi Xin Tang Zhe Jin Le Wang Donglin Zu Weimin Wang
Key Laboratory for Quantum Information and Measurements, Ministry of Education School of Electronics Institute of Heavy Ion Physics, and Beijing Key Laboratory of Medical Physics and Engineering Physic
国际会议
Progress in Electromagnetics Research Symposium 2007(2007年电磁学研究新进展学术研讨会)(PIERS 2007)
北京
英文
1898-1902
2007-03-26（万方平台首次上网日期，不代表论文的发表时间）