Optimization of terahertz range gyrotron self-excitation conditions by increasing the lifetime of cyclotron oscillators in low-voltage interaction space

Abstract

We propose a method of reducing the starting and operating currents of short-wavelength gyrotrons that is based on the application of a decelerating voltage directly to the resonator. The desired effect is achieved due to increasing electron lifetime in the interaction space. At a preset injection current, this circumstance ensures gyrotron self-excitation at a relatively low diffraction Q-factor, which leads to significant reduction in ohmic losses.