Design and Experiment of a 140 GHz 50kW Gyrotron

A 140GHz 50kW gyrotron has been designed by the codes developed in CAEP. To validate the design, a prototype has been fabricated and the experiment is ongoing now. In the experiment, a Gaussian beam of 52kW/30s with a single-stage depressed collector operation has been achieved. The extension of pulse duration is underway with the aim of 50kW/60s, and now an output power of more than 30 kW for 60 s has been achieved. The design and the experimental results will pave the way for our future 140GHz MW gyrotron development.