A Computational Tool for the Study of RF Breakdown Phenomena

Radio-frequency (RF) breakdowns is an important barrier to obtaining higher field gradients in modern accelerators. Unfortunately, there are presently no simulation tools that allow understanding and quantitative estimation of the damage produced by RF breakdown in realistic accelerating structures and RF components. This project will develop a new computational tool for the analysis of RF breakdown in three-dimensional high-power structures. The new capability will be integrated into the Analyst finite-element software package, and will include time-domain electromagnetics, self-consistent particle-in-cell modeling of multi-species particles, collision effects, and field emission models. Commercial Applications and other Benefits as described by the awardee: A predictive tool for modeling radio-frequency breakdown in high-power accelerator components should lead to improved reliability of high power RF devices and lower the cost of future accelerators.