摘要
从原理上分析了减小梯度线圈的半径可以减小其在带抗涡流板磁体中引起的涡流.然后采用目标场方法设计了一组半径缩减的梯度线圈,并用Biot-Savart定理计算了这个梯度线圈的梯度线性区.最后通过磁共振成像实验证明了原理中分析得出的结论.
In this paper, a method for reducing the eddy current induced in the magnet with an eddy-current-resisting board by reducing the radius of the gradient coil is proposed. First, the method is analyzed using a theoretical model. Then a gradient coil with reduced radius is designed by using a target field method, and the gradient linear region is verified by using the Biot and Savart＇s law. Finally, an experiment is performed to testify the result proposed in principle.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第6期3060-3066,共7页
Acta Physica Sinica
关键词
梯度线圈
涡流
目标场
流函数
gradient coils, eddy currents, target field, stream function
