Design and Experiment of the Conventional Collector for W-band Gyrotron Oscillator

In this paper, the design and experiment of the conventional electron beam spreading system for W-band gyrotron oscillator collector is presented. The conventional spread system consists of a magnetic shade and two pairs of coils. The particle-in-cell (PIC) simulation of the collector under the conventional spreading system has been finished. The power density distribution of the electron beam on the collector wall has been measured in the hot test of the gyrotron oscillator.