Microwave characteristics of high current linear induction accelerator cavity

Methods to determine the transverse impedance of a linear induction accelerator(LIA) cavity both in calculation and experiment were introduced. To minimize transverse impedance is very important in designing induction cavities for an LIA，since for a new designed cavity to investigate its RF fields related to the shape of the accelerating gap is in very high priority. Three different cavities were chosen as models, accelerating cavities of a 10 MeV LIA and “Dragon-I”, and a non-accelerating cavity of “Dragon-I” designed for vacuum pump and beam diagnosis. Both coaxial line method and η factor method were employed in experimental tests. The main parts of the device used in both methods were identical, which was a coaxial line with two off center inner conductors formed by one under tes