The Benefits of a Magnetic Mirror in a Traveling Wave Tube: Computational Experiments’ Results

A comparative traveling wave tube (TWT) particle-in-cell (PIC) simulation based on a corrugated electrodynamic retarding structure with and without a magnetic mirror (MM) has been performed. As a result, it has been found that there is a significant benefit of a MM for TWT. It manifests itself in the increase in microwave generation power, power level stabilization, and a decrease in the duration of the power rise time to the average level. In this case, the use of a MM does not lead to a change in microwave radiation spectral characteristics.