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漂移管直线加速结构中心工作频率325 MHz,腔体内馈入功率2.5 MW,用于低能段强流质子束流的加速。腔体采用圆波导,内部周期性漂移管加载结构。采用杆耦合器稳定腔内的场分布,调谐器来改变腔体的谐振频率,由输入耦合器将射频功率馈入腔体内。首先采用束流动力学计算软件对漂移管直线加速结构的束包络、束流相位、有效分路阻抗及束流半径等进行了计算,确定漂移管直线加速结构腔体的基本尺寸。然后采用射频电磁场数值计算软件对漂移管直线加速结构内的场分
The center of the drift tube linear acceleration structure operates at 325 MHz with 2.5 MW of power in the cavity for accelerating the low-energy intense proton beam. Circular waveguide cavity, the internal periodic drift tube loading structure. The rod coupler is used to stabilize the field distribution in the cavity and the tuner to change the resonant frequency of the cavity. The input coupler feeds the RF power into the cavity. Firstly, the beam envelope, the phase of the beam, the effective shunt impedance and the radius of the beam were calculated by using the beam dynamics software to determine the basic dimensions of the linear accelerator chamber. Then use the RF electromagnetic field numerical software to drift tube linear acceleration structure within the field