Experimental study of complex dynamics in a delayed-feedback multiple-cavity klystron self-oscillator

Abstract

The main characteristics of a delayed-feedback multiple-cavity klystron oscillator with various oscillation modes (single-frequency oscillations, as well as regular and chaotic self-modulations) are studied experimentally. Maps of dynamic modes on the beam current-accelerating voltage plane are presented. Basic scenarios of transition to chaos are considered. As the beam current and amount of feedback increase, regular and chaotic oscillation modes are found to alternate in a complex manner. It is shown that one can significantly increase the power of chaotic oscillations by appropriately tuning the control parameters.