Modeling of Multipacting in RF Structures Using VORPAL

Nieter, Chet; Stoltz, Peter H.; Roark, Christine; Mahalingam, Sudhakar
November 2010
AIP Conference Proceedings;11/5/2010, Vol. 1299 Issue 1, p399
Conference Proceeding
VORPAL is a simulation framework which can model electromagnetic fields and charged particle dynamics in RF structures such as those encountered in high gradient accelerating cavities. Multiple models exist in VORPAL to determine the secondary electron yield (SEY) for an impact of a primary electron on the cavity surface. Combining these models allows VORPAL to be used to study electron multipacting in radio frequency cavity structures. VORPAL also supports the tracking of individual multipacting trajectories as well as recording the impact history of multipacting electrons. We present simulation results of multipacting simulations in various RF structures including accelerating cavities as well as coupler and waveguide structures. Benchmarking results are given comparing VORPAL results from other codes as well as experimental data.


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