10th LHC Operations "Evian" Workshop

Session

Session 3

24 Nov 2021, 11:00

500/1-001 - Main Auditorium (CERN)

Conveners

Session 3: Run 3

• Matteo Solfaroli Camillocci (CERN)
• Stephane Fartoukh (CERN)

Session 3: Run 3

• Stephane Fartoukh (CERN)
• Matteo Solfaroli Camillocci (CERN)

Session 3: Run 3

• There are no conveners in this block

Presentation materials

Evian Session 3 Main points.pdf

Evian Session 3 Main points.pptx

14. Experiment desiderata (20' + 10')

Brian Petersen (CERN)

24/11/2021, 11:00

During LS2 all LHC experiments have performed detector maintenance and upgrades to improve physics performance. For LHCb and ALICE this enables them to take data at significantly higher luminosity. The performance goals, luminosity limitations as well as special requests/constraints for the running conditions will be presented for both proton and heavy ion running. The forward physics program...

17. Machine configurations for protons and validation steps (20' + 10')

Rogelio Tomas Garcia (CERN)

24/11/2021, 11:30

The completion of the LIU project will enable LHC to inject beams twice as bright as in Run 2 (both from lower emittance and higher intensity). The LHC Run 3 Configuration Working Group (LCR3) has reached a solid proposal for the Run 3 operational scenario to maximize integrated luminosity. This talk presents key aspects of this proposal including a roadmap with key validation milestones,...

15. Limitations and constraints to the levelled luminosity (20' + 10')

Ilias Efthymiopoulos (CERN)

24/11/2021, 12:00

In Run 3 using a combination of beta* and crossing angle settings, the instantaneous luminosity delivered to the high-intensity interaction points IP1 and IP5 of LHC will be leveled to a maximum of 2e34 cm-2s-1 in collisions, from a few hours (in 2022) up more than 10 hours (in 2023/2024). This leveled value is set by the cryo-cooling capacity of the existing inner triplet and, slightly in the...

16. Triplet luminosity lifetime (20' + 10')

Francesco Cerutti (CERN)

24/11/2021, 14:00

The present LHC lifetime is directly linked with the radiation dose limit that can be withstood by the beam line elements around the ATLAS and CMS detectors, in particular the insulator material used in the coils of the superconducting magnets composing the final focus triplet string and the normal conducting modules of the separation dipole. The peak dose profile along the aforementioned coils...

18. Beam-Beam effects (20' + 10')

Sofia Kostoglou (CERN)

24/11/2021, 14:30

The restart of the LHC operation in 2022 for three years of physics production, namely Run3, coincides with the completion of the injector’s upgrade, aiming to increase the beam brightness by a factor of two (achieved both from improved emittance and increased intensity). Such an increase of the beam intensity is accompanied by an enhancement of the strong non-linear fields produced by...

22. Coherent instabilities (20' + 10')

Nicolas Mounet (CERN)

24/11/2021, 15:00

The LHC beam stability is evaluated throughout the different beam processes for Run 3, considering the beneficial effect of the collimator upgrade as well as the increased brightness with respect to Run 2. The related recommendations in terms of Landau octupole strength, chromaticity, damper gain and optics corrections are thus provided. Finally, a plan is proposed for measurements during Run...

19. Plans for LHC ion operation in Run 3 (20' + 10')

Roderik Bruce (CERN)

24/11/2021, 16:00

This talk gives an overview of the foreseen running periods for Pb-Pb and p-Pb operation in Run 3, as well as the foreseen machine configuration and expected beam parameters. The projected luminosity performance will be presented, as well as possible paths for improvement. In addition, the tentative plans for the LHC pilot run with oxygen beams will be discussed.

34. RF beam Dynamics in Run 3 (20' + 10')