GAS M&O meeting 21 October 2019
Present: Beatrice, Roberto, Michal, Fred, Patrick, LPh, Sabino, Federico, Fabio
Indico: https://indico.cern.ch/event/857532/
ALICE #
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
- Probably a leak to find (see piquet elog 878)
- Big pump arrived at P2
Reminder:
- LPh to prepare a summary on how the system is now —> this week
- TRD
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 #2024
Reminder:
- After the power-cut there was not communication with PLC: damage of differential circuit breaker —> to repair
- MDT
- Working on rack 64 and 68 for ELMB cards
Reminder:
- Rack 68 (ch 17): one channel is keeping going to zero —> try to change the ELMB
CMS #2004
- RPC
- OFF
- Rack 85: problem of pressure sensors in error: problem in the cable (UX-US)
- All pneumatic lines tested
- Feedback valve in exhaust to check —> Patrick
- Safety valves dismounted for calibration and re-installed
- Commissioning of the software on-going
- DT
- Test for power cut for the exhaust line —> to do another test next week
- CSC
- Moving to Arcal10 for CSC for welding in SGX5
Reminder:
- Warning to set-up —> Beatrice/Michal/Roberto
- GEM
- Commissioning started: elog 2017
Reminder:
- 1 chamber in purge in CO2
- Control rack: to modify power supply and electrical cable (still with TOTEM) —> Patrick/Michal
- To modify the réseaux socket for the GEMPLC (now it is with TOTEM) —> Andrea
- R134a recuperation
- Add line of Air for the R134a recuperation
- Add line for iC4H10 exhaust this week
LHCb #2026
- RICH1
- RICH2
- New pieces for high pressure for the recuperation of CF4 —> to install this week
- GC
- PC is working but not the GC —> Mara to contact the company
- MWP
- Change motherboard in rack 66: now it is working fine. Still difference between the racks —> to change also the others?
PIQUET
- elog 879
- LHCb RICH2 stop —> to modify PID that are not able to follow for the regulation valve
- elog 878
- ALICE TPC stop —> too low pressure at the input of the pump —> potential leak? —> to investigate
- elog 876
- CLOUD: problem with Naphtalene: not possible to control the MFC —> LPh to check
- Exhaust temperature TE7906 does not correspond to the one you see in place and in WinCC-OA it is in the wrong place
GENERAL
- Presentation of Mara about the LHCb RICH 2 recuperation
PLC/Software
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