Resonant dynamics of one-side multipactor on dielectric surface

TL;DR

This paper investigates the resonant behavior of one-side multipactor discharges on dielectric surfaces in RF windows, using PIC simulations to understand their development and impact on dielectric breakdown.

Contribution

It provides a comprehensive self-consistent simulation analysis revealing the resonant nature of one-side multipactor dynamics on dielectric surfaces.

Findings

Identified correlations between multipactor parameters and dielectric properties.

Demonstrated the resonant phenomenon underlying multipactor development.

Provided insights into RF field effects on multipactor saturation.

Abstract

Breakdown of dielectric RF windows is an important issue for particle accelerators and high-power RF sources. One of the common reasons for RF window failure is the multipactor on a dielectric surface. The multipactor may be responsible for excessive heating of the dielectric and discharge of charges that accumulated in the ceramic due to secondary emission. In this study, comprehensive self-consistent PIC simulations with space charge effect were performed. This was to better understand the dynamic of one-side multipactor development and floating potential on the dielectric induced by the emission. The important correlations between the multipactor parameters at saturation, the secondary emission properties of dielectric, and the applied RF field parameters have been found, which led to the conclusion that the dynamics of one-side multipactor on dielectric is a resonant phenomenon.