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介绍了10MeV/20kW大功率辐照加速器的设计.该加速器采用返波型行波加速结构加速管,综合了常规行波加速结构微波反射小、频率稳定性好和驻波加速结构分流阻抗高的优点.加速器工作于S波段,中心频率为2856MHz.利用自编的模拟程序AccDesign进行物理设计,设计输出电子束能量为10MeV,脉冲流强300mA,加速管总长1.5m,模拟计算结果显示微波至电子束的转换效率为66%.同时利用计算机仿真程序对加速腔的温度和应力分布进行了计算,得到了微波功率损耗对加速腔频率的影响.
The design of 10MeV / 20kW high power radiation accelerator is introduced. The accelerator adopts a back-wave traveling-wave accelerating structure accelerating tube, which has the advantages of small microwave reflection, good frequency stability and high shunt impedance of the standing wave accelerating structure Advantages The accelerometer operates in the S-band and has a center frequency of 2856 MHz. The physical design of the accelerometer is performed with a self-designed simulation program AccDesign. The designed output electron beam energy is 10 MeV, the pulse current is 300 mA and the total length of the accelerating tube is 1.5 m. The conversion efficiency of the beam is 66% .At the same time, the temperature and stress distribution in the acceleration chamber are calculated by the computer simulation program, and the influence of microwave power loss on the frequency of the acceleration chamber is obtained.