Speaker
Description
The High-Luminosity LHC (HL-LHC) project aims at increasing beam intensity, hence posing tight constraints on its injector chain. A critical issue in the Proton Synchrotron (PS) is the contribution of numerous pumping manifolds to the longitudinal beam coupling impedance at high frequencies. It causes microwave instabilities that particularly affect ion beams and limit the longitudinal density of proton bunches close to transition energy. This contribution characterizes the impedance of these vacuum components through analytical methods and detailed electromagnetic simulations, examining configurations with and without a pick-up head inserted in the manifold. Complementary radiofrequency measurements provide a comprehensive understanding of the impedance. Mitigation strategies, including shielding to prevent beam coupling with the manifold's volume, are evaluated for their effectiveness using electromagnetic simulations, offering solutions for improved beam performance.
| Region represented | Europe |
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| Paper preparation format | LaTeX |
