Abstract
Multipactor discharge between dielectric and metal was investigated and experimentally verified for the first time. Moreover, multipaction electron evolution laws in the complex ferrite component were revealed, and discharge breakdown threshold was analyzed. Through reasonable approximation and by establishing the equivalent analytical model, the effects of the external static magnetic field and charge accumulation were investigated, and transient electronic trajectory was obtained. Based on the electromagnetic particle-in-cell technology, the three dimensional simulation method of electron evolution in complex ferromagnetic microwave components was implemented. The discharge threshold was obtained through the long term evolution of field to electron and electron to field interactions and verified by multipactor measurement on the circulator for the first time. Instead of the steady field condition, the steady particle condition was proposed for the threshold prediction, exhibiting great potential in the space industry application. It is demonstrated that for ferrite dielectric-metal multipaction, the phase focusing process was prolonged, and the traditional prediction criteria for the threshold analysis were invalid due to the existence of the external magnetic field and highly inhomogeneous field distribution.
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