1–6 Jun 2025
Taipei International Convention Center (TICC)
Asia/Taipei timezone

Correction of long-range beam-beam driven normal sextupolar resonance driving terms

MOPM019
2 Jun 2025, 16:00
2h
Exhibiton Hall A _Magpie (TWTC)

Exhibiton Hall A _Magpie

TWTC

Poster Presentation MC1.A01 Hadron Colliders Monday Poster Session

Speaker

Sasha Horney (European Organization for Nuclear Research)

Description

Beam-based studies at the LHC injection energy showed that compensation of the strongly driven sextupolar resonance, Qx+2Qy, improved both the dynamic aperture and lifetime of the beam, even when far from the working point and on the far side of the 3Qy resonance. Thus, a reduction of other strong normal sextupolar resonance sources was of interest. In 2024, the first measurements of resonance driving terms with long-range beam-beam (LRBB) interactions were performed. These showed that LRBB was driving the same Qx+2Qy resonance strongly when colliding, in agreement with model predictions. A correction was found for the strongest normal sextupole resonances using the existing sextupole corrector magnets in the LHC, obeying the constraints on the chromatic coupling and the maximum magnet powering. Beam-based tests to validate the response of this correction with non-colliding beams have been performed along with the testing of the LRBB resonance correction during LHC commissioning.

Region represented Europe
Paper preparation format LaTeX

Author

Sasha Horney (European Organization for Nuclear Research)

Co-authors

Ewen Maclean (European Organization for Nuclear Research) Dr Felix Carlier (École Polytechnique Fédérale de Lausanne) Joschua Dilly (European Organization for Nuclear Research) Laurent Deniau (European Organization for Nuclear Research) Mael Le Garrec (European Organization for Nuclear Research) Philip Burrows (John Adams Institute) Rogelio Tomas (European Organization for Nuclear Research) Tobias Persson (European Organization for Nuclear Research) Vittorio Ferrentino (University of Naples Federico II)

Presentation materials

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