Influence of Mode Competition on Synchronization in a Gyrotron

Abstract

Medium-power (10-100 W) THz-band gyrotrons operating in a continuous-wave (CW) mode are of great importance for many applications such as spectroscopy, plasma diagnostics, non-destructive inspection, stand-off detection of radioactive materials, biomedical applications, etc. For all these applications, high frequency stability and tunability within 1-2 GHz frequency range is typically required. Apart from different existing techniques for frequency stabilization, phase locking has recently attracted strong interest. In this paper, we present the results of numerical simulation phase locking by injection of the external driving signal, self-injection locking by delayed reflection, and mutual phase locking of two coupled gyrotrons. Mode competition effect on phase locking is investigated.