Minutes and Summary

Main purpose of the meeting: Current status of the ion run

 

Filip (Introduction)

Slide 3: 

• Roderik commented that the BLM thresholds were not adjusted at the end, as deemed to be not needed. It would have needed more validations otherwise. 

• VdM for ALICE likely scheduled for tomorrow morning Tuesday 10th October

• Filip commented that it is more and more likely that the pp leftover program for the year may create too much overhead. It is rather preferred to add an extra 12 hours for Ion MDs.

  • Rende asked how early the pp reference run next year could be. 

  • Filip commented that it will be done early but LHC will need to be commissioned and VELO will want to be closed. More discussion will be needed. 

• Jorg reminded everybody that a quench test will be done on the very last night of operations of the year

Slide 5:

• Roderik reminded us that if we go to 40b trains, the SPS needs to be adapted to it. Jorg commented that it is not fully sure that we can inject more intensity. This will need to be tested. 

• Jorg commented that oven refill is optionally tomorrow Tuesday 10th October

 

Silvia asked a question about cryo. Jorg commented that currently point 2 is in non-economy mode. However the rest is still in economy mode, which means we are currently exposed to long cryo recovery time. Possibly, the whole machine could be put back in non-economy mode, in a way that loses the least amount of time (maybe in the shadow of an access or another stop). 

 

Jorg also commented that they got some feedback from QPS regarding the quench: SEUs are actually on two different locations. It is also noted that some of the boards in the region are not as rad-hard as in ATLAS/CMS

 

Sarah (ALICE)

Slide 8: some discussions went on the actual value of luminosity, between online display and Massi’s files.

 

Niels (LHCb)

Slide 1: luminosity value will likely be adjusted. 

 

Silvia (ALICE)

Slide 2: tolerance on ZDC is based on the total integrated dose for the full Run3.

 

Gianni (CMS)

Slide 2: not mentioned in the slide, but also CMS disfavors any pp reference data taking this year.

 

AoB: Next LPC meeting on Monday 16th October next week.