GAS M&O meeting 14 October 2019

Present: Beatrice, Roberto, Michal, Kacper, Andrea, Fred, Patrick, LPh, Sabino, Federico, Fabio

Indico: https://indico.cern.ch/event/855148/

ALICE #2001

• MTR

Reminder:

• mixer pressure regulation does not work: Zimmerli not installed
• exhaust pressure regulation does not work
• Dummy chamber: Arturo said he has no manpower to install the pipes. Beatrice said that we (gas team) will not pull the pipes
• TPC
  • Rack pump re-building done: leak test on-going
  • Final connection for TPC for the gas system
  • Modification to add the filter in the distribution pipe

Reminder:

• LPh to prepare a summary on how the system is now —> in 2 weeks
• TRD
  • elog 862 piquet:
    • LPh found a leak in the exhaust of the analysis module (in the VBO)
    • Second leak: LPh left open a manual valve din the calibration line

Reminder

• Purifier: safety valve at the input where we have Ar or Ar/H2 at high pressure —> LPh to check with safety
• Purifier: to review if keep the safety valve or the rupture disk

ATLAS #2002

• CSC

Reminder:

• After the power-cut there was not communication with PLC: damage of differential circuit breaker —> to repair
• RPC
  • Pump 3 maintenance
  • Purifier filters modification started
• MDT

Reminder:

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

CMS #1993

• RPC
  • OFF
  • Dummy chamber prepared with leak test
  • RB0,-1 and -2 distribution rack prepared for dummy chamber
  • Safety valves dismounted for calibration
  • To finish the commissioning and testing of all pneumatic lines
  • Geraldine and Marc working on the software
  • Electrical work: elog 2000
  • Purifier 3: new chassis ready. Mechanics work to do

Reminder:

• Rack 85: problem of pressure sensors in error —> Michal/Patrick to check
• DT
  • Test for power cut for the exhaust line —> to do another test this week
• CSC
  • Moving to Arcal10 for CSC for welding in SGX5
  • Elog 1996: regulation valve of distribution rack 66

Reminder:

• Warning to set-up —> Beatrice/Michal/Roberto
• To check and correct level of oil in bubblers of distribution
• Problem on distribution: strange peaks in the regulation valve and some alarms due to low pressure in the rack —> to investigate
• GEM
  • Channel 29: six chambers connected
  • Channel 28: six more chambers to connect
  • Reminder
  • To modify the réseaux socket for the GEMPLC (now it is with TOTEM) —> Patrick/Michal
  • Control rack: to modify power supply and electrical cable (still with TOTEM) —> Patrick/Michal
  • 1 chamber in purge in CO2
• R134a recuperation
  • Add line of Air for the R134a recuperation
• General
  • Open/close plugs during open days and last Monday: 2 mbar more in the cavern caused a stop of CSC distribution racks 

LHCb #1999

• RICH1
  • in Run with CO2
• RICH2
  • New pieces for high pressure for the recuperation of CF4 —> to check for high pressure
• GC
  • PC is working but not the GC —> Mara to contact the company 

Reminder:

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

PIQUET

• elog 866
  • HH alarm of TPC distribution due to leak test on-going by Chilo

GENERAL

• Presentation of Federico for the surface treatment
  • Very important to put the right title in the job

PLC/Software

Commissioning procedure:

• BE install software
• Michal and site technical responsible do commissioning
• if commissioning not finished:
  • email to gas-piquet with status
  • if possible force stop modules not commissioned
  • elog (copy/past of email gas-piquet)
  • whatsapp to 162516 (copy/past of email gas-piquet)