| Article | |
| Title | First measurement of fourth and fifth order chromaticity in the LHC |
| Author(s) | Le Garrec, M (Goethe U., Frankfurt (main) ; CERN) ; Carlier, F S (CERN) ; Dilly, J (CERN) ; Maclean, E H (CERN) ; Persson, T H B (CERN) ; Tomás, R (CERN) ; Wegscheider, A (CERN) |
| Publication | 2023 |
| Number of pages | 4 |
| In: | JACoW IPAC 2023 (2023) MOPL027 |
| In: | 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.MOPL027 |
| DOI | 10.18429/JACoW-IPAC2023-MOPL027 |
| Subject category | Accelerators and Storage Rings |
| Abstract | Chromaticity up to the third order in the LHC has been well observed in the LHC’s first and second operational runs, with regular beam-based measurements performed during commissioning and machine development. In previous runs however, no higher-order chromaticity could be observed. In 2022, dedicated collimators setups meant optics measurements could benefit from an improved range of momentum-offset for the chromaticity studies. This allowed the observation of fourth and fifth order chromaticity in the LHC at 450GeV for the first time. Measurements were performed for several machine configurations. In this paper, results of the higher order non-linear chromaticity are presented and compared to predictions of the LHC magnetic model. |
| Copyright/License | © 2023-2024 the author(s) (License: CC-BY-4.0) |
Corresponding record in: Inspire
Journalen skapades 2023-12-13, och modifierades senast 2023-12-14
