GAS M&O meeting 18 November 2019
Present: Beatrice, Roberto, Fred, Patrick, Kacper, Andrea, LPh, Mara, Gianluca, Sabino, Federico, Fabio
Indico: https://indico.cern.ch/event/862139/
ALICE #no elog
Reminder:
-
- exhaust pressure regulation does not work
- mixer pressure regulation does not work: Zimmerli not installed
- CPV
- Start to reconnect the detectors
- There are 5 channels in WinCC-OA while there are 10 in the distribution —> Michal
- TPC
- Start to put Neon in the TPC
- Problem with the water cooling of the purifier column: solenoid valve changed has it was blocked
- O2 analyser: change of cell and calibration
- TRD
- Missing one signal in the recuperation: Michal fixed
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 #2075
Reminder:
-
- After the power-cut there was not communication with PLC: damage of differential circuit breaker —> to repair
- MDT
- Work on-going for 2nd pump
Reminder:
-
- In general: several problems with pressure sensor in MDT. Patrick said to add a resistance in the channel
- RPC
- Mixer instability since 6th November: injection increased of 250 l/h
- Kacper said nothing seen in the flowcell
- You see a step in the total flow of the flowcells on the 05 November —> Kacper to check from where it is going
- RPC people said there was a leak on 06/11 and they repaired on 07/11
- New manifolds arrived
- TRT
- Problem with web-mass —> Michal to check
CMS #2070
- RPC
- OFF
- Dummy chambers construction on-going
- Electrical cable of rack 85 to finish (even if it is CMS responsibility)
- Start foreseen for 26th November
- Jonathan did the connection of the 3 dummy chambers
- Rack 85: problem of pressure sensors in error: problem in the cable (UX-US) —> Anton to change it
- DT
Reminder:
-
- Test for power cut and re-start for the exhaust line —> to do other tests
- CSC
- To stop the system to install differential pressure sensor on the pump and Krohne (Tue)
Reminder:
-
- Warning to set-up —> Beatrice/Michal/Roberto
- GEM
- Ga system working
- Flowcells problem in rack 61:
- Ch 3 and 7: to regulate the input flow by closing a bit the flowcell
- Ch 5: to change the output flowcell
Reminder:
-
- To modify the réseaux socket for the GEMPLC (now it is with TOTEM) —> Andrea
- R134a recuperation
- To do:
- Heating tape for the exhaust pipe
- compressor test with R134a
- Piping
- Add buffer with FESTO volume of 20 liter
- 22nd: safety and electrical inspection
- To understand logic in case of presence of leak/iC4H10 —> Roberto/Nicola Broca
LHCb #2074
- RICH1
- in Run with CO2
- 1.5 ppm of O2 every 2 days
Reminder
-
- Re-fill with CO2 but we take 600 ppm because the pump took Air —> to think what it can be done to avoid Air intake at the re-start of the system
- RICH2
- need to finish installation of by-pass to re-inject into the mixer
- GC
- SciFi
- Electrical work done
- Commissioning this week
- Profibus cable not pull in the right way for the analysis trolley: instead of being in series it is in “parallel” —> to check what it can be done
PIQUET
- CMS GEM
- Regulation valve of the pump was keeping going to zero
- Kacper went in place to regulate and it disconnected the pressure on the Zimmerli
- ATLAS MDT
- Problem with the humidifier: not enough pressure to push the gas in the humidifier
GENERAL
- CMS Regulation valve summary by Sabino
- 4 valves will be installed
- Presentation of Demetrio
- Aging test
- In a new rotameter from Krohne: connector with glue
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