GAS M&O meeting 16 September 2019

Present: Beatrice, Roberto, Michal, Andrea, Fred, LPh, Sabino, Fabio, Federico, Luca, Gianluca

Indico: https://indico.cern.ch/event/848559/

ALICE #no elog

• MTR
  • Test of PLC (on/off) to reproduce the crash done: nothing happened

Reminder:

• • Dummy chamber: to ask to Arturo for manpower to install the pipes. Arturo said beginning of September
• TPC
  • Rack pump re-building on going
  • 7th October: final connection for TPC for the gas system

Reminder:

• • LPh to prepare a summary on how the system is now —> in 2 weeks
• TRD
  • Purifier: to review if keep the safety valve or the rupture disk
  • Purifier: safety valve at the input where we have Ar or Ar/H2 at high pressure —> LPh to check with safety
  • Purifier: changing material this week

ATLAS #1956

• TFC
  • CO2 cooling failure of TRT which stop TFC
• MDT

Reminder:

• • Rack 68 (ch 17): one channel is keeping going to zero —> try to change the ELMB

CMS #1950

• RPC
  • OFF
  • Installed one set-up for the regulation valve: to meet this week in CMS to check for space
  • Ready to start for the modification of purifier —> this and next week
    • with T valves, we have only 5. we put a cap for the sixth one
  • Rack 85: problem of pressure sensors in error —> Michal/Patrick to check
  • Modification of pre-distribution finished
• DT
  • Filter pump: Kacper added 1/16 of capillary for the pressure sensor —> now pressure value is stable —> to implement on other pump modules
• CSC
  • Problem on distribution: strange peaks in the regulation valve and some alarms due to low pressure in the rack —> to investigate
  • Fond a N2 leak in valve YY6671: repaired

Reminder:

• • To check and correct level of oil in bubblers of distribution
  • Warning to set-up —> Beatrice/Michal/Roberto
• GEM
  • Try to run the system but system was not stable: pump in negative pressure

LHCb #no elog

• RICH1
  • in Run with CO2
• RICH2
  • New MFM for the permeate
  • To understand how to proceed with two membranes
• SciFi
  • Install racks after Open Days (to finish few things)
  • To finish the system by October

Reminder:

• MWPC in run with Ar/CO2
  • Rack 64 —> to investigate

PIQUET

• TFC stop during week-end

GENERAL

• Update from Sabino on the ex-OT Gas System
  • Several problems in the gas system material: rotameter full of liquid, manometer not working correctly
  • Start to prepare a maintenance procedure for the mixer
• Update from Fabio about CF4 recuperated
• Update from Federico about LHCb CF4 membrane
  • Try to work with second membrane

PLC/Software