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为实现高能大功率电子辐照加速器的一机多用目的,需研制270°偏转光路支线。本文采用Trace3D程序对270°偏转光路进行了设计与模拟计算,设计了双135°偏转磁铁和整体270°偏转磁铁。对双135°和整体270°两种偏转磁铁元件进行二维和三维电磁场设计与模拟计算,计算结果表明,整体270°偏转磁铁的场分布与光路设计中所要求的物理参数差距较大。由于整体270°偏转磁铁的场分布调整较困难,使工程实施中的束流调试难度较大,因此采用双135°偏转磁铁的光路方案。
In order to realize the multi-purpose of one machine of high energy and high power electron irradiation accelerator, it is necessary to develop a 270 ° deflection optical branch. In this paper, the Trace3D program was used to design and simulate the 270 ° deflection optical path. The double 135 ° deflection magnet and the overall 270 ° deflection magnet were designed. Two-dimensional and three-dimensional electromagnetic fields are calculated and calculated for two types of deflection magnet with double 135 ° and total 270 °. The calculated results show that the field distribution of the whole 270 ° deflection magnet has a large gap with the physical parameters required in the optical path design. Because of the difficulty of adjusting the field distribution of the whole 270 ° deflection magnet and making it difficult to debug the beam in the engineering implementation, the optical path scheme of the double 135 ° deflection magnet is adopted.