GAS M&O meeting 11 June 2019
Present: Beatrice, Patrick, Andrea, Fred, Kacper, Luca, Roberto, Michal, Gianluca
Indico: https://indico.cern.ch/event/826057/
ALICE #no elog
Reminder:
- MTR problem with humidifier (with GC we measure 1/3 of H2O with respect to the beginning of the test) —> LPh to investigate
ATLAS #no elog
- RPC
- change value of R134a MFC from 3% to 2%
- TRT
- They need new pipes in distribution racks this week —> Kacper
- Valve island
- Finished valve island panel, only the one of RPC postponed to when the system will be in stop
- TGC
- Investigation of flowcell status —> start this week
- Detection head found a small npentane leak in the rack membrane —> Kacper to follow up
- We need to add 48 flowcells for the NSW: do we have them? —> Fred to follow up with Michal
Reminder:
- Flowcell for new RPC racks —> Kacper to give the flow necessary —> to decide if 3 or 5 mm
CMS #1837
- DT
- Differential pressure sensor mounted —> missing electrical connection —> Andrea/Patrick
- Need to start to pull the pneumatic pipes for the new pneumatic rack
- RPC
- OFF
- 3rd purifier columns mounted
- Modification of piping for injection mixture from purge
- Need to change the MFC of R134a with the one of ATLAS: piping to modify
- 3.1 distribution racks: missing pipes and electrical connection
- GEM
- Installation positive racks mid-June (13/06)
- Finishing rack at P5
- Missing 36 flowcells —> Michal
- Problem with all bubblers (input wrong diameter) —> Andrea to modify at the supplier
- Ar and CO2 MFCs to change with the new one and to install safety valve in distribution rack
- Beatrice to check when they want to run the gas system
- Other
- AUG test postponed due to fire alarm
- Problem with PGS in SF6 in the scale of battery (13/05) —> Michal to investigate
LHCb #887(piquet elog)
- RICH1
- in Run with CO2
- to monitor the Air content with the Analysis Chain (O2) and with GC for N2 (every two weeks) —> Mara
- it seems we are already taking Air
- to prepare a plot with O2 concentration and pressure atmospheric —> Beatrice
- RICH2
- In Run
- Still small leak in high pressure part of compressor
- Modification to recuperate CF4: membrane <-> purifier —> done
- Found leaks in mixer and exhaust —> to quantify the leak —> Patrick/Luca
- Found leak in 2nd membrane of RICH2 (around the connection of the body)
- In case we can use RICH1 membrane, which is not leaking. Roberto suggested to use it as third membrane
- Remote control of the compressor —> done
- Check maximum flow that we can send to compressor —> Luca
- OT
- SG racks can be sent in Meyrin
Reminder:
- MWPC in run with Ar/CO2
- Rack 64 —> to investigate
PIQUET
GENERAL
- Krzysztof show a presentation about LS2 control system upgrade
- Mixer regulation of PID is doing but not for the MFC —> Michal to check with Patrick how to do
- Profibus card has an internal functional diagnosis: to try —> Michal/Krzysztof
- New presentation of diagnosis of profibus at end of the month
- MFC calibration
- We will start to send MFC to Bronkhost
- Beatrice show the list: only in ATLAS and CMS we have MFC to send.
- First list of MFC to send:
- ATLAS: MDT high flow, TRT CO2 high flow, TGC (CO2 and nPentane) —> Kacper
- CMS: CSC high flow, DT open mode (Beatrice to verify with DT), RPC Humidifier —> Andrea to dismount, Kacper to send
PLC/Software
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