Speaker
Description
Accurate beam coupling impedance modeling is essential for predicting collective effects and ensuring stable high-intensity operation in the LHC and its High-Luminosity upgrade. Operational experience has shown that even small mechanical details can have a significant impact on the impedance of accelerator components, potentially leading to performance degradation or hardware failure. In addition, impedance sources are not static: beam-induced heating and the resulting mechanical stresses can drive gradual geometric changes, such as loss of electrical contact or deformation of shielding elements, thus modifying the impedance during operation. In this work, we present recent advancements in high-fidelity impedance modeling and demonstrate their relevance through representative case studies in the LHC. These examples show how improved modeling, combined with beam-based diagnostics, provides critical input for operational strategies and supports informed design and optimization of components in view of the challenging HL-LHC requirements.
Funding Agency
Research supported by the HL-LHC project
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