Speaker
Description
Dedicated instability studies were performed in the LHC to quantify the impact of Landau octupoles on transverse beam stability. Controlled single-bunch instabilities were intentionally triggered at injection energy, and the corresponding growth rates were measured while systematically varying the Landau octupole knob. A clear correlation between the octupole current and the measured instability growth rate was observed. These measurements are compared with theoretical expectations to improve and benchmark the real part of the LHC impedance model, in particular its broadband component. The results not only provide valuable input for refining the impedance model, but also represent a direct quantitative observation of Landau damping in the LHC.
Funding Agency
Research supported by the HL-LHC project
| Paper status | Resubmitted proceeding files received and assigned to an editor. Accepted by Submitter. |
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