The impact of trimming currents on the uniformity of field and multipole components is carefully investigated by using the two kinds of magnetic measurements, hall sensor and long coil, respectively. 在其磁场测量中,使用了点测和积分测量的方法对其各方面特性参数进行了测量,并对积分场的测量结果以及内置垫补线圈对均匀场的垫补效果进行了详细的非线性分析。