The resistive-wall klystron as a high-power microwave source

A novel high-power high-frequency klystron is presented in which a relativistic electron beam is modulated at the first cavity and propagates downstream through a resistive wall. Because of the self-excitation of the space charge waves by the resistive-wall instability, a highly nonlinear current modulation is accomplished. Due to the relatively large growth rate of the instability, the required tube length of the klystron is short for most applications