Design and testing of focusing magnets for a compact electron linac
Design and testing of focusing magnets for a compact electron linac
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紧凑型电子直线加速器聚焦磁体的设计和测试
DOI：
10.1016/j.nima.2015.07.018
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发表时间：
2015-10
期刊：
影响因子：
--
通讯作者：
Pei Yuanji
中科院分区：
文献类型：
--
作者：
Chen Qushan;Qin Bin;Liu Kaifeng;Liu Xu;Fu Qiang;Tan Ping;Hu Tongning;Pei Yuanji
螺线管场误差对电子束质量有很大影响。本文介绍了一种紧凑型电子直线加速器的高精度螺线管的设计和测试。提出了一种基于约化包络方程求解相对论电子束螺线管峰值场的有效而实用的方法。用考虑空间电荷力的束流动力学方法预测了聚焦效应。在泊松和OPERA程序包的帮助下，介绍了实现超紧凑结构和高精度的详细优化方法。尝试在离线测试中抑制系统误差，该测试显示短透镜和主螺线管分别产生0.13T和0.21T的峰值磁场。对中轴线和离轴线的数据进行了分析，试验结果与设计吻合较好。
Solenoid field errors have great influence on electron beam qualities. In this paper, design and testing of high precision solenoids for a compact electron linac is presented. We proposed an efficient and practical method to solve the peak field of the solenoid for relativistic electron beams based on the reduced envelope equation. Beam dynamics involving space charge force were performed to predict the focusing effects. Detailed optimization methods were introduced to achieve an ultra-compact configuration as well as high accuracy, with the help of the POISSON and OPERA packages. Efforts were attempted to restrain system errors in the off-line testing, which showed the short lens and the main solenoid produced a peak field of 0.13 T and 0.21 T respectively. Data analysis involving central and off axes was carried out and demonstrated that the testing results fitted well with the design.
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DOI：
10.1016/j.nima.2014.04.048
发表时间：
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期刊：
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
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