GAS M&O meeting 28 October 2019

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

Indico: https://indico.cern.ch/event/859067/

ALICE #no elog

• MTR

Reminder:

• • Dummy chamber: Arturo will install the pipes in January, gas team will do weld
  • exhaust pressure regulation does not work
  • mixer pressure regulation does not work: Zimmerli not installed
• TPC

Reminder:

• • LPh to prepare a summary on how the system is now —> this week
• TRD
  • Rack 66 in error and not selected —> LPh to check

Reminder

• • 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

ATLAS #2036

• CSC

Reminder:

• • After the power-cut there was not communication with PLC: damage of differential circuit breaker —> to repair
• MDT

Reminder:

• • Rack 68 (ch 17): one channel is keeping going to zero —> try to change the ELMB
• General
  • Power-cut due to smoke alarm in SGX1 due to external work
• RPC
  • Andrei is finishing the pipes
  • This week to send everything to cleaning

CMS #2034

• RPC
  • OFF
  • Anton asked to prepare all dummy chambers
  • Rack 85: problem of pressure sensors in error: problem in the cable (UX-US) —> contacted Anton to change it
  • Feedback valve in exhaust to check —> Patrick: the N2 was closed
  • Commissioning of the software on-going
  • To add filter for pump
• DT

Reminder:

• • Test for power cut and re-start for the exhaust line —> to do other tests
• CSC

Reminder:

• • Warning to set-up —> Beatrice/Michal/Roberto
• GEM
  • Commissioning started: elog 2017
  • Start planned for 4th November: connection of 12 channels GE1/1- from tomorrow

Reminder:

• • To modify the réseaux socket for the GEMPLC (now it is with TOTEM) —> Andrea
  • Control rack: to modify power supply and electrical cable (still with TOTEM) —> Patrick/Michal
  • 1 chamber in purge in CO2
• R134a recuperation
  • Added line of Air for the R134a recuperation
  • Add line for iC4H10 exhaust this week —> on-going
  • To check for supply of 220 V + 400 V (Lauda) —> Patrick
  • To understand logic in case of presence of leak/iC4H10 —> Roberto/Nicola Broca

LHCb #2035

• RICH1
  • in Run with CO2
• RICH2
  • need to instal filter but it will arrive mid November: to look for another place before the filter of the exhaust
• GC
  • PC is working but not the GC —> today company will come to check
• SciFi
  • Start electrical work
  • Need to stop all system to modify N2 line —> this week

PIQUET

• elog  886
  • Alarm for HH temperature in cloud
• elog 885
  • ALICE TRD too long injection time: Andrea changed the mixer flow injection to 5h but he said that alarm was still active
  • LPh to verify why we inject for such a long time

GENERAL

• Discussion about to change filter in exhaust with 1 um everywhere
• R134a presentation by Gianluca
• Presentation of 3D drawings of CPV Humidifier by Sabino
  • LPh confirmed that all the material is available at the workshop except one festo volume
• Presentation about regulation valves for CMS RPC by Sabino