用于LIA强流脉冲电子束能谱测量的磁分析器设计

Design of a magnetic analyzer for the measurement of energy spectrum of pulsed intense electron beam

摘要:

为了测量一台直线感应加速器输出的强流脉冲电子束的能谱宽度，开展了磁分析器的设计研究工作。从磁分析器测试能谱的原理出发，根据被测对象以及测试的一些基本条件提出了磁分析器的基本参数，据此进行了磁铁的理论设计，利用Vector Fields公司的Opera3D/Tosca软件对磁铁进行了三维仿真计算，并对理论设计的结果进行了优化。设计得到的磁分析器为C型磁铁，偏转半径300 mm，硬边近似后偏转角度60°，磁极间隙30 mm，好场区宽度65.4 mm。磁分析器的设计结果很好地满足了物理需求。

Abstract:

A magnetic analyzer was designed to measure the energy spectrum of the pulsed intense electron beam of a linear induction accelerator. The principle of magnetic analyzer was described. The basic parameters were set based on the accelerator and some test conditions. The magnet was designed theoretically according to these parameters. 3-D simulation and optimization of this design were performed using Opera/Tosca software from Vector Fields Co. The final parameters of this magnetic analyzer were obtained. The magnetic analyzer was C-shape, with the bending radius of 300 mm and the bending angle of 60 degree after hard-edge approximation, and the good-field-region was 6.54 cm. Results of the design satisfy the physical requirement very well.