Research on Typical Displacement Current Peak in Relativistic Magnetron Priming

During the operation of the relativistic magnetron (RM), the sudden change of voltage waveform will produce displacement currents that play a prominent role in assessing the operation state of magnetron, while they have been neglected in the previous research. Therefore, in this article, we introduce a novel method to analyze the working state of the magnetron in the starting stage by using the typical displacement current peak (TDP). The theoretical analysis shows that the TDP in a well-matched RM is attributed to the asynchrony between the mutation of self-magnetic field and electron beam, and the appearance of the TDP means the slow oscillation establishment or sluggish electron beam growth in the RM. According to such theory, we present a method to improve the operation state of RM and eliminate the TDP, and it is verified in our experiment. This work is beneficial for diagnosis and adjustment of RM working state in priming.