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介绍利用耦合腔链等效电路模型计算加速管场分布的原理和方法．把加速腔链等效为谐振电路, 通过求解回路方程组,并引入分流阻抗等物理参数,可计算加速腔链整管的电磁场幅值和相位分布．这一计算方法对加速管动力学设计和加速管几何参数设计有很好的指导意义,并在16MeV返波加速管设计调试过程中得到了应用和验证．
This paper introduces the principle and method of calculating the distribution of accelerating tube field by using the equivalent circuit model of coupled cavity chain. The accelerating cavity chain is equivalent to the resonant circuit. By solving the loop equations and introducing the physical parameters such as shunt impedance, the amplitude and phase distribution of the electromagnetic field in the cavity-accelerating integrated tube can be calculated. This calculation method is very instructive for the design of accelerating tube dynamics and the design of accelerating tube geometric parameters, and has been applied and verified in the design and debugging of 16MeV return wave accelerating tube.