大口径高均匀度核磁共振Halbach磁体研究

刘万震, 陈方, 陈黎, 王佳鑫, 程鑫, 易鹏, 张志, 刘朝阳

Research on Large-bore and High Homogeneity Halbach Magnet for Nuclear Magnetic Resonance

LIU Wanzhen, CHEN Fang, CHEN Li, WANG Jiaxin, CHENG Xin, YI Peng, ZHANG Zhi, LIU Chaoyang

图5 (a)磁体端部单、双环结构对目标区域磁场均匀度的影响（共7层磁环）对比；(b)磁体上下两端未添加磁环时（单环结构），目标区域磁场分布仿真结果；(c)磁体上下两端添加磁环后（双环结构），目标区域磁场分布仿真结果

Fig. 5 (a) The effect of adding magnetic rings at both ends of the magnet on the homogeneity of the ROI (seven magnet ring layers in total); (b) Simulation result of magnetic field distribution in the ROI when no magnetic rings are added at the top and bottom ends of the magnet; (c) Simulation result of magnetic field distribution in the ROI after adding magnetic rings at both ends of the magnet