Non-Stationary Wide-Band Operation of a High-Current Relativistic Gyrotron

We report on the first experimental studied of a Ka-band high-current relativistic gyrotron with an increased length of the interaction space. Wideband non-stationary operation with an output power of up to 70 MW and an efficiency of ~7% are registered. Based on comparison of experimental data and simulations, we estimate the output radiation spectrum width to be at least 2 GHz.