直线感应加速器中聚束磁场的数值计算方法
Numerical simulation of beam focusing magnetic field in linear induction accelerator
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摘要: 为了准确模拟出直线感应加速器中聚束磁场的值，首先利用单积分法计算出理想情况下的聚束磁场的值，再进一步用磁路分析的方法考虑直线感应加速器的加速腔中匀场环对聚束磁场的影响，然后推导出一组偏离角度与磁场分量相关的公式。将最终得到的聚束磁场分量与直线感应加速器模型结合起来，采用粒子模拟的方法来模拟电子束在加速段中的输运过程，并对结果加以分析。Abstract: The magnetic field generated by the solenoid mounted inside the accelerating cell is calculated. There are three steps to finish this work. Firstly, a formula of the ideal magnetic field of the solenoid is deduced according to the Biot-Savart law. Secondly, the effect of the field homogenizer ring on the magnetic field is taken into account. Then, a group of formulas are deduced which relate the deflecting angle to the magnetic field components. At last, the electron transport in accelerating cell is simulated with the derived field components, and the comparison between the measurement and the simulation validate the calculation.
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