一种新型双间隙输出腔的理论和实验研究
Theory analysis and experiment investigations of an original double-gap cavity
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摘要: 从双间隙分离腔的色散关系式出发，通过数值计算求出了分离腔中IM010模对应的谐振频率，并给出了腔内轴向电场的分布图，证实了分离腔中存在着电场反相的π模场。因此，可以将其用作电场反相的双间隙输出腔，来实现双间障提取。并用2.5维粒子模拟程序——卡拉特（KARAT）程序对这种分离腔输出回路进行了粒子模拟和优化设计。通过详细的冷测和调试实验，研制出了中心频率为3.74GHz、QL值为7.8的低QL值双间隙输出腔。Abstract: Starting from the cold dispersion relation, which is employed to numerically calculate eigenfrequencies for the double-gqp spil cavity, thereby the resonant frequency for the split cavity TM010 mode are obtained and the distributing character of p -mode are discussed. Accordingly, the split cavity can be used as double-gap output cavity. And then the double-gap output cavity is designed by using the 2.5D, relativistic, fully electromagnetic, PIC code KARAT, and more optimizing the construct of output cavity. At last by modulating the different construct parameters, the cold tests are carried on, and by which the low-QL output cavity of center frequency 3.74GHz and 7.8 of load QL is developed.
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