19–24 May 2024
Music City Center
US/Central timezone

Evolution of special LHC optics configurations Run 3 update

MOPC16
20 May 2024, 16:00
2h
Country (MCC Exhibit Hall A)

Country

MCC Exhibit Hall A

Poster Presentation MC1.A01 Hadron Colliders Monday Poster Session

Speaker

Ilias Efthymiopoulos (European Organization for Nuclear Research)

Description

The Large Hadron Collider (LHC) employs special optics and configurations, alongside low-beta collision optics, to address specific experimental requirements. These include calibrating luminosity monitors (vdM) and facilitating forward physics measurements in TOTEM and ALFA experiments (high-beta). The special optics have been in use since Run 1, and for Run 3, they have been updated for compatibility with standard low-beta collision optics to ensure streamlined commissioning and reduced setup time. For vdM optics in Run 3, beam de-squeezing yields beta values of 19 to 24 m, while in the high-beta optics, beams are de-squeezed to round beams with beta of 120 m, followed by a second step to asymmetric optics with beta of 3 km and 6 km in the horizontal and vertical planes. The 2023 high-beta optics run with the km beta* optics, incorporates tight collimation settings and the use of crystals at top energy for the first time, aiming to substantially reduce backgrounds in the experiments. This publication introduces and discusses the updated optics for Run 3, covering their validation, optics measurement results, and operational insights.

Region represented Europe
Paper preparation format LaTeX

Primary author

Ilias Efthymiopoulos (European Organization for Nuclear Research)

Co-authors

Andreas Wegscheider (European Organization for Nuclear Research) Daniele Mirarchi (European Organization for Nuclear Research) Ewen Maclean (European Organization for Nuclear Research) Dr Felix Carlier (Ecole Polytechnique Fédérale de Lausanne) Frederik Van der Veken (European Organization for Nuclear Research) Joschua Dilly (European Organization for Nuclear Research) Mael Le Garrec (European Organization for Nuclear Research) Marco D'Andrea (European Organization for Nuclear Research) Matteo Solfaroli (European Organization for Nuclear Research) Roderik Bruce (European Organization for Nuclear Research) Rogelio Tomas (European Organization for Nuclear Research) Sasha Horney (European Organization for Nuclear Research) Stefano Redaelli (European Organization for Nuclear Research) Stephane Fartoukh (European Organization for Nuclear Research) Tobias Persson (European Organization for Nuclear Research) Vittorio Ferrentino (University of Naples Federico II)

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