Minutes and Summary

Main purpose of the meeting: This meeting was dedicated to the draft presentations on 2022 experiment feedback and 2023 run expectations and wishes in view of the 2023 Chamonix Workshop.

Introduction
- preference for high beta run in July
   * will need to foresee some tests for high beta* run
     including crystal collimation for 6km run
- preference for top energy at HI
   * Roderik: will have some uncertainty due to uncertainty on 10 Hz
              losses and new crystal collimation performance as well
       as extrapolation for quenches
   * presentation from Roderik in LPC after Chamonix
- to decide when emulsion exchanges take place after TS1
   * Richard: will gain confidence in recostruction and how much lumi
              is maximum - waiting for reco of second emulsion set
- ATLAS BCM dumps at high intensity appears to be consistent with UFOs
   * ATLAS not keen on raising threshold
- next meeting on February 6th

2022:
- ALICE plot to be updated end of the week

2023:
- during warm-up, both vacuum and safety system failed
   pressure differential much higher than allowed
- see bulging on VELO RF foil - how to fix?
- no leak and no damage to module
- SND shielding in planning - installation second half of February
- LHCb will be running at different pile-up levels through the year
   (going up)
- slide 14: "total" cross section, not just "inelastic".
             very high beta mostly for rho
      september as backup
- slide 15: Roderik would like a few shifts earlier for optics setup
             Valerie: vdM sessions for ion and pp-ref runs
- slide 16: need caveat for optimal length of slip-stacked beams
             energy: ALICE: prefer higher energy, but not at cost running time
- slide 17: for p-He need VELO at least partially closed
- slide 19: backup slide for cool-down required from RP

 Stephane: developing new optics for 24/25 with opposite triplet
           polarity in IP1/5 to gain a lot of triplet lifetime
    requires horizontal crossing in IP1 and vertical
    crossing in IP5
Feedback:

 ALICE:
  - new RC Andrea Ferrero
  - massi file problem * to be checked *
  - low intensity run was important for detector commissioning
  - ALICE can also turn off magnets also for MDs

 CMS:
  - ECAL repair done
  - mu=60 is minimum target - evaluating if 65 possible, 70 is disfavoured

 ATLAS:
  - not sure if mu limit will known by chamonix, but expect at least input
    from physics side