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T race3D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‐usage on one high power electron irradiation accelerator ,the 270° bend branch is needed to be researched .The beam dynamic design and calculation were done for 270° bend branch with the Trace3D code .Two schemes of bend magnet were designed .One is 270° bend and the other is double 135° bend .The design and calculation of the 270° and double 135° bend magnets were done by using two‐dimensional and three‐dimensional electro‐magnetic field calculation code . The calculation result shows that there is a big difference between the simulation and the beam dynamic demand of the field distribution of 270° bend magnet .Because it is very difficult to adjust the field of 270° bend magnet during the commissioning ,the double 135° bend magnet is preferred to be used .
展开▼
