A 2D analytical expression for the eddy current in the Ti-coated layer of a nonlinear kicker is presented, along with a comparison to numerical simulations. The nonlinear kicker-based injection scheme has gained popularity in recent years and is now employed at several facilities. As a pulsed magnet, the vacuum chamber must be made of ceramic, with its inner surface coated with a conductive...
Our studies indicate that parametric instabilities except the envelope instability are unlikely to be observed in actual linear accelerators unless waterbag or KV distributions are generated. Furthermore our studies and previous literatures indicate the dominance of particle resonances over parametric instabilities in high-intensity linear accelerators. Any counter evidence has not been found...
Higher harmonic cavities (HHCs) play a critical role in storage rings by extending the bunch length, thus mitigating beam instability and increasing the beam lifetime. This study investigates the influence of Robinson instability on the bunch lengthening performance for both active and passive HHCs. A detailed comparison is conducted to analyze the Robinson instability thresholds* and the...
