Theory analysis and experiment investigations of an original double-gap cavity

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.