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Gas systems project
GAS M&O meeting 07 October 2019
Present: Beatrice, Roberto, Michal, Kacper, Andrea, Fred, Patrick, LPh, Sabino, Federico, Mara, Gianluca
Indico: https://indico.cern.ch/event/852947/
ALICE #no elog
- MTR
- exhaust pressure regulation does not work
- mixer pressure regulation does not work: Zimmerli not installed
Reminder:
-
- Dummy chamber: Arturo said he has no manpower to install the pipes
- TPC
- Rack pump re-building done: to do leak test (since last week)
- 7th —> 14th October: final connection for TPC for the gas system
- Modification to add the filter in the distribution pipe
Reminder:
-
- LPh to prepare a summary on how the system is now —> in 2 weeks
- TRD
- Regulation valve in pump module was oscillating a lot: Michal fixed he problem by changing the PID (elog 1983)
- In general: not waiting too much time before saying in case of oscillation problem of the valve
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 #1984
- General power-cut
- CSC
- After the power-cut there was not communication with PLC: damage of differential circuit breaker —> to repair
- RPC
- MFC of R134a repaired last week and installed
- MDT
- New P&ID for the pump module: two pumps
- It is a turbo pump so we need the pneumatic valve normally open
- Addition of filter in front of the pump to avoid any dust going inside the pump
- Need to stop the gas system for two weeks to do the modification
Reminder:
-
- Rack 68 (ch 17): one channel is keeping going to zero —> try to change the ELMB
CMS #1981
- General power-cut
- We loose the pressure in the FESTO module regulator every time the system stops: there is a default int he module —> Patrick/Fred/Andrea to check
- RPC
- OFF
- Modification of purifier filters finished (see picture in the elog)
- Pneumatic pipes on going (50% done), to finished in week 42
Reminder:
-
- Rack 85: problem of pressure sensors in error —> Michal/Patrick to check
- CSC
- Stop analysis rack of CSC to check if the spikes of regulation valves are coming from the this —> Andrea
Reminder:
-
- Problem on distribution: strange peaks in the regulation valve and some alarms due to low pressure in the rack —> to investigate
- To check and correct level of oil in bubblers of distribution
- Warning to set-up —> Beatrice/Michal/Roberto
- GEM
- To modify the réseaux socket for the GEMPLC (now it is with TOTEM) —> Patrick/Michal
- Control rack: to modify power supply and electrical cable (still with TOTEM) —> Patrick/Michal
- 1 chamber in purge in CO2
- Try to run the system but system was not stable: pump in negative pressure (-60 mbar)
- R134a recuperation
- Add line of Air for the R134a recuperation
- General
- Open/close plugs during open days and last Monday: 2 mbar more in the cavern caused a stop of CSC distribution racks
LHCb #1982
- RICH1
- in Run with CO2
- RICH2
- Regeneration of purifier done last week
- Membrane 2 is still old one and it is not efficient —> we will not use
- Then we will need to move to Air: waiting for the compressor. But then it will be the detector people to put Air inside
- SciFi
- To connect pipes for the racks of distribution and mixer
- Chassis: still 2 weeks of work
- To finish the system by October
- GC
- PC is working but not the GC —> Mara to contact the company
Reminder:
- MWPC in run with Ar/CO2
- Rack 64 —> to investigate
PIQUET
- elog 860
- Heating of purifier not working but it was off because it was not commissioned yet
- elog 862
- Pump alarm because the pressure in the loop was too high (1.7 bar). After several investigations , it looks like it is the analysis module (exhaust and pump valves in the analysis module) —> LPh to investigate
- ALICE TPC: somebody closed the back-up of CO2 —> LPh to check
GENERAL
- Student (sesec) show the status of electrical drawings
- Pump module almost ready
- ELMB2: new firmware will be prepared by a guy
- Commissioning of software: if not finished
- Put in force mode in WinCC-OA
- Add an entry in the elog
- Send an email to gas piquet
- New manifolds
- Still wrong: Andrea discussed with the main workshop
- Company wants to do a prototype to check if they will do correctly: 1 week
- Regulation valve
- The one with PWL
PLC/Software
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