X波段失谐加速结构的计算

Calculation of an X-band detuned accelerator structure

采用Mafia程序设计X波段失谐加速结构 ,同时利用Largrange插值的方法计算了加速结构的尺寸 ,得到了加速结构的特性参数和尾场特性。结果表明 ,失谐加速结构的品质因子 (792 6 .0～ 80 12 .2 )和分路阻抗 (89.7～ 12 5 .1MΩ/m)比较高 ,与等阻抗加速结构相比 ,可以使尾场明显下降 。

An X-band detuned accelerator structure was designed using the Mafia code and the parameters were calculated efficiently through the Lagrange interpolation method, then the characteristics and wakefield of this structure were obtained in the end. The results indicate that this structure not only has high quality factor and high shunt impendence, but also can suppress the wakefield to decrease significantly to a low level comparing with the constant impedance accelerator structure, so that the probability of beam break-up is reduced to a great extent.