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Multimode steady-state analysis for a Ka band Gyrotron Traveling Wave Amplifier

In this abstract, the analysis for improving the stability of Gyrotron Traveling Wave Amplifier with Uniform Dielectric-Loaded (UDL) and Periodic Dielectric-Loaded (PDL) waveguides was studied by multimode steady-state theory. The realization process of the steady amplification for a Ka band TE01 fundamental mode Gyro-TWT was discussed. The theoretical results for the RF output power are in good agreement with those in the experiment at a 7% velocity spread.