GAS M&O meeting 20 May 2020
Present: Beatrice, Roberto, Andrea, Patrick, Kacper, Fred, Mara, Gianluca, Fabio, Federico, Leonardo
CHECK Gas Systems
ALICE #2491
TOF
ATLAS #2490
MDT
- Reset of pressure sensors giving problem (elog #2489)
- P&ID test on going with Gianluca (elog #2437)
- Problem with the reading of one flowcell: connector found with a bit of oxidation. Now cleaned and it seems working
TGC
- On-going preparation too tart weld next week
RPC
- Rack 62 in open mode
- Second line of mixer we have N2 instead of iC4H10
CMS #2493
RPC
- Add iC4H10 and SF6 to the mixer. Still a problem of calibration for MFCs —> need to set iC4H10 MFC at 4% to have 4.5% in IR
- Increase flow to 400 l/h
- Test on regulation valve (ECONEX) on-going. Next Tuesday need to move ECONEX from rack 74 to rack 83
- Rack 80 ch 7 problem in reading: to check cables in flowcell when there is an access —> Andrea
CSC
- MFCs calibration on-going
- Replace Krohne in Exhaust module with a new one
- Gas system will be re-started on Monday and distribution rack 63 must stay in stop
CF4 recovery
- Add two MFMs in membrane module
- Add new battery for the CF4 storage
PGS
- Ar/H2 leak repaired
- MFM of SF6 and iC4H10 don’t work properly. Beatrice to check with David
- Patrick said that calibration of MFM is much time consuming than calibration of MFC (you need to add a valve in front of the MFM for regulation the flow)
LHCb #no elog
RICH2
- PLC dismounted, new cabling on-going. Next week (on Tuesday) new PLC and software
- IR modification on-going
- There is not reading of detector pressure (DCS is also off): Patrick to check if we can have the reading of chamber pressure
- New compressor module: no reply from Eric, so we will go for installation in the flammable room.
- New compressor module: to find the pump for the purifier gas recuperation
RICH1
- system stopped and restarted: we took only few ppm of air
- To discuss what tests we want to do
SciFI
- to check problem on 3-way valve
General
- Federico can start leak search with new CO2 leak detector for MWPC, RICH1 and RICH2
GENERAL
- Next week planning ok: similar to the one proposed to DT
- MFC calibration campaign restarted
- Planning discussed during the meeting
- Planning available in indico
From previous meeting:
- Level of PGS sometimes is > 100% —> Michal to check
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