采用包含空间电荷效应的束流光学计算软件TRANSOPTR对CYCIAE-100回旋加速器轴向注入线进行设计,在综合考虑空间布局、元件选择、真空度、空间电荷效应、轴向磁场和造价等问题后,最终确定了轴向注入线的聚焦结构.将数值跟踪获得的真实磁场下螺旋偏转板传的输矩阵编写到TRANSOPTR程序中,从而实现了从离子源出口至偏转板出口的束流光学匹配.介绍了CYCIAE-100回旋加速器轴向注入线的设计思想、布局结构和束流光学计算结果,并给出了主要元件的设计结果.在确定中心区结构和对中轨道后,采用多粒子轨道跟踪的方法进行中心区束流匹配的研究,通过对数值模拟的结果进行椭圆拟合并结合解析公式计算得到注入点处匹配矩阵,为注入线的设计提供拟合条件.%With the computer program TRANSOPTR including space charge effect calculations, a axial injection line for the CYCIAE-100 cyclotron is designed. The focusing structure is confirmed after considering space, focusing elements, vacuum, space charge effect, axial magnetic field and cost. The transfer matrix for the inflector under the real varying axial magnetic field is obtained by numerical tracking and it is built into TRANSOPTR for the beam line optics calculations from the downstream of the ion source to the exit of the inflector. The layout and the optical results of the injection line of CYCIAE-100, and the designs of the main elements in the injection line are given. After the electrode structure of the central region and the centering orbit are obtained, the beam matching is studied using the multi-particle tracing. The matching matrix is achieved by ellipses fitting for the tracking results and the analytic formula, which is useful in injection line design.
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