Speaker
Mael Le Garrec
(European Organization for Nuclear Research)
Description
Studies of third-order chromaticity in the LHC during its initial two runs have consistently demonstrated a substantial discrepancy between the expected Q''' at injection and that observed in beam-based measurements. In 2022 during Run 3, for the first time, studies of Q''' have been complemented by measurements of chromatic detuning, being the momentum-dependence of amplitude detuning, and the decapole resonance driving term 𝑓1004. In this paper, these beam-based measurements are presented and compared to the magnetic model. Potential sources of the previously identified Q”’ discrepancy are discussed.
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Primary author
Mael Le Garrec
(European Organization for Nuclear Research)
Co-authors
Felix Carlier
(Ecole Polytechnique Fédérale de Lausanne)
Joschua Dilly
(European Organization for Nuclear Research)
Vittorio Ferrentino
(European Organization for Nuclear Research)
Ewen Maclean
(European Organization for Nuclear Research)
Rogelio Tomas
(European Organization for Nuclear Research)
Konstantinos Paraschou
(European Organization for Nuclear Research)
