8th LHC Operations Evian Workshop

Session

Session 2a: 2017 Operation & Performance

12 Dec 2017, 15:35

Hotel Ermitage

Conveners

Session 2a: 2017 Operation & Performance

• Kajetan Fuchsberger (CERN)
• Benoit Salvant (CERN)

Presentation materials

EVIAN WORKSHOP 2018 Summary of session 2.docx

EVIAN WORKSHOP 2018 Summary of session 2.pdf

12. Feedback from the Experiments on the 2017 run (20' + 5')

Jamie Boyd (CERN)

12/12/2017, 15:35

Abstract:
This talk will cover feedback from the experiments on the 2017 run, including the high luminosity 13 TeV running, as well as the scheduled special runs that took place. It will include feedback on the 8b4e BCS scheme that was developed as a mitigation of the 16L2 issue observed during the 2017 run. In addition it will cover feedback on new operational features that were implemented...

13. LHC Operation: Experience and new tools (20' + 5')

Theodoros Argyropoulos (CERN)

12/12/2017, 16:00

Abstract:
This contribution presents a general overview of the LHC operation in 2017. It outlines the experience gained during the year after all the machine improvements (ATS optics, 30cm beta* and crossing angle levelling at IPs 1 and 5, RF full-detuning, etc.) that were put in place since 2016 and how the daily operational procedure was affected. New software tools or updates on the...

14. New optics correction approaches in 2017 (15' + 5')

Ewen Hamish Maclean (CERN)

12/12/2017, 16:25

Abstract:
In 2017 optics commissioning strategy for low-beta operation underwent a major revision. Where formerly the beam-based commissioning exclusively considered linear dynamics, the new approach is based on a combined commissioning of linear and nonlinear optics. Details of the updated strategy will be reviewed, together with associated impacts on optics quality and operation. New...

16. Beam Losses, lifetime & collimators hierarchy (15' + 5')

Alessio Mereghetti (CERN)

12/12/2017, 16:45

Abstract:

The LHC collimation system is aimed at ensuring a safe machine operation; it provides the LHC with passive protection, minimizing the risk of magnet quenches induced by beam losses. In 2017, the LHC collimation system confirmed its excellent performance, with no magnet quenches due to losses from circulating beams while accommodating changes in machine configurations. The system...

23. Incoherent beam-beam effects and lifetime optimisation (15' + 5')

Dario Pellegrini (CERN)

12/12/2017, 17:05

Abstract:
In 2017, three major developments with serious implications on the beam lifetime took place: the deployment of the crossing angle orchestration (allowing to act on it even in stable beams), the reduction of beta* from 40 to 30 cm and the switch to 8b4e (and later BCS) beams. These actions have been closely followed up with Dynamic Aperture (DA) simulations and, when possible, also...

18. 16L2: Operation, observations and physics aspects (15' + 5')

21. E-cloud observations and experience (15' + 5')

53. End of day 1.

20. Experience with high lumi running & Feedforward (15' + 5')

22. Guided Discussion (30')

End of day 1 at 18:10

17. Incoherent beam-beam effect and lifetime optimisation (15' + 5')

19. Our understanding of the Instabilities and mitigation tools/strategy (15' + 5')

15. What did we learn from the use of ATS in 2017 (15' + 5')