Speaker
Description
This study investigates the feasibility of high-charge, low-energy 300 MeV linac-to-booster injection for the High Energy Photon Source (HEPS) injector. The primary aim is to enable a klystron hot-standby for the HEPS linac, thereby enhancing its operational reliability. Energy ramping simulations for the booster were conducted using elegant, both Gaussian and non-Gaussian bunches were tracked. Simulations and analysis indicate that, with a suitable initial RF voltage, Transverse Mode-Coupling Instability (TMCI) is the limiting factor for the beam transmission rate in the booster. By optimizing the chromaticity to enhance Landau damping, TMCI can be effectively suppressed, significantly improving beam transmission rate. A further reduction in the injected bunch energy spread leads to additional gains in beam transmission rate. Through this synergistic optimization of multiple parameters, it looks feasible to achieve stable transport of beam with bunch charge exceeding 5 nC in the booster at the lower injection energy mode for the HEPS injector.
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