Minutes and Summary

Main purpose of the meeting: Status of the proton lead run.

Introduction (Jamie Boyd)

Jamie summarised the status of the ongoing proton lead run. Even though during the past week some problems affected availability, the run is proceeding successfully and a significant fraction of the requested luminosities has been accumulated: For the p-Pb part of the 8 TeV programme all experimenst collected more than half of the requested luminosity and after the smooth transition to the Pb-p part of the programme more than half of the requested luminosity for this direction has been already collected.

The programme of the next days includes a max 12 hour MD for crystal collimation on Tuesday, and VdM scans on Wednesday and Thursday.

Jamie discussed possible scenarios for the case the run continues to proceed smoothly. We could investigate the feasibility of an option to go back to the 5TeV part of the programme in order to fully fullfill the request of ALICE for this part. In this case one would optimise the filling schemes for maximal luminosity to ATLAS and CMS for the days before switching to the 5TeV programme for the last 24 - 36 hours. During the discussion of this possibility it was stated that ATLAS and ALICE would have to consult their physics comunities in order to get a statement, whereas CMS is not in favour of this scenario since it would mean less total integrated luminosity for them. It was decided that this option would be re-discussed on Wednesday after experiments have had the chance to discuss this internally.

Summary of the LHCf run (Lorenzo Bonechi)

Lorenzo summarised the LHCf data taking. LHCf took successfully data during the 5TeV and the 8TeV part of the proton lead run. During the 8 TeV run LHCf had to cope with a large intensity spread in the proton bunches and the total running time was reduced from the requested 12h to 9.5h due to various problems on the machine side, but in the end the acquired statistics and data quality was good so that the LHCf collaboration can fulfill their physics goals.

Lorenzo thanked John Jowett, all involved people on the LHC side and the LPC coordinators for their support in making this run a success.