Session 3 - 2015 Commissioning with Beam
- Mike Lamont
- Giulia Papotti
Session 3 [Chair: Mike Lamont; Scientific secretary: Giulia Papotti]
9/23/14, 9:00 AM
In motivating the session, the challenges of re-commissioning the LHC in 2015 are introduced.
9/23/14, 9:10 AM
Expectations and constraints from the LHC experiments concerning the commissioning procedure and the running conditions for the 2015 data taking period are discussed, as well as the experiments views about the various beam parameters for the p-p period, like beam energy, maximum pileup, bunch spacing and luminosity limitation in IP2 and IP8. The goals and the constraints of the 2015 physics...
9/23/14, 9:40 AM
This presentation shows the baseline machine parameters for the 2015 start-up, with focus on collimation and the reach in beta*. Since many machine systems have been upgraded during LS1, and the LHC will operate at a higher energy than before and with a tighter filling scheme, the commissioning phase risks to be less smooth than in 2012. Therefore, the proposed starting configuration of the...
9/23/14, 10:40 AM
A review of the possible optics configurations for the 2015 LHC run will be made. The rationale behind the various scenarios will also be presented together with the latest results of the validation studies. Special runs, such as Van der Meer and high-beta, will be discussed too. Finally, the next steps and the related milestones will be discussed with the goal of achieving a consensual...
Matteo Solfaroli Camillocci
9/23/14, 11:10 AM
During Run2 LHC operation will be based on the experience gained in Run1 while being operated at about its design energy. Longer time will be required by the main operational phases (e.g. precycle, ramp) and operational re-configurations are being considered to improve efficiency. The expected changes in the magnetic model and the impact of the data updates with the corrections calculated...
9/23/14, 11:40 AM
Electron cloud buildup simulations and machine experience during Run 1 showed that electron cloud effects could significantly limit the performance of the LHC when operating with 25 ns bunch spacing. Beam induced scrubbing will have to be used to lower the Secondary Electron Yield (SEY) of the beam chambers and therefore reduce electron cloud induced pressure rises, heat load and beam...