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Analysis of the Effect of the Difference between Designing and Machining on Electric Characteristics in a 140GHz Gyrotron Oscillator Cavity

To compare with the difference between the designed cavity and the machined cavity, the measured size data of the three machined cavities were used to calculate cold-cavity characteristics and beam wave interaction respectively for analyzing the effect on the resonant frequency, diffractive quality factor, axial field distribution, output power and efficiency.