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描述了一种１８０°消色差等时性磁偏转系统，它由４个具有中心对称平面的二极磁铁构成。用传输矩阵方法研究了其消色差和等时性关系，并讨论了系统的二阶效应。该系统具有良好的等时性、消色差性及聚焦特性。其紧凑的结构尤为适于反射式加速器中束流的倒向传输。
Describes a 180 ° achromatic isochronous magnetic deflection system which consists of four diodes magnets with a central symmetry plane. The achromaticity and isochronism of transmission matrix are studied, and the second-order effect of the system is discussed. The system has good isochronicity, achromaticity and focusing characteristics. Its compact structure is particularly suitable for the reverse transmission of the beam in a reflective accelerator.