本文报道了利用多丝束流剖面仪测量从等时性回旋加速器中引出束流的轴向性能,包括束流的中心位置、相对于磁场中心平面的夹角及束流在轴向的发射度。同时也测量了束流引出区环形补偿线圈中的励磁电流变化对引出束流性能的影响。测量结果表明,环形线圈电流变化对束流轴向发射度的影响较大,而对束流中心在轴向几何位置的影响较小。 In this paper, we report the measurement of the axial performance of a beam derived from an isochronal cyclotron using a multi-beam beam profiler, including the center of the beam, the angle relative to the center of the magnetic field, and the degree of beam emission in the axial direction . At the same time, the influence of the variation of the excitation current in the annular compensation coil of the beam extraction zone on the performance of the outgoing beam was also measured. The measurement results show that the change of the toroidal coil current has a great influence on the axial emittance of the beam, but has little influence on the axial geometric position of the beam center.