【摘要】 计算了X波段(f=9．37GHz)介质和金属膜片混合加载行波加速结构的TM01模和HEM11模的色散曲线,结果表明HEM11模的截止频率比TM01模的低,说明与盘荷波导相比,该种新加速结构单束团的BBU效应得到改善．实验研究优选得到了适用于该种新加速结构的介质(εr 5．812)．采用 MAFIA程序优化设计了模型腔,测试频率与设计的数值吻合得很好．更多还原

【Abstract】 The dispersion curves of the TM01 and HEM11 modes for the X-band hybrid dielectric-iris-loaded travelling accelerating structure have been calculated. The results show that the cutoff frequency and the propagation constant of HEM11 mode are lower than those of the TM01 mode. We have found that the certain dielectric available with permittivity of 5.81 is applied to the design of the new accelerating structure. The MAFIA code has been used to optimize the model cavities, and the measurements indicate that the resonance frequency is consistent with the design frequency.更多还原