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Gas systems project
GAS M&O meeting 30 September 2019
Present: Beatrice, Roberto, Michal, Kacper, Andrea, Fred, Patrick, LPh, Sabino, Federico, Gianluca, Mara
Indico: https://indico.cern.ch/event/851652/
ALICE #1974
- 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
- 7th —> 14th October: final connection for TPC for the gas system
Reminder:
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- LPh to prepare a summary on how the system is now —> in 2 weeks
- TRD
- Purifier: found dust of copper from the cartridge material (elog 1980)
- Pump: found particles in the pump module
Reminder
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- 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 #1973
- TFC
- Temperature pump: ~170 C but it is “normal” with the new pump
- Roberto explained the new configuration to run the TFC system (elog 1970)
- Distribution rack 4: settings have been changed
- RPC
- MFC of R134a repaired last week —> to re-install this week
- Mixer flow not stable since a while (elog 1967)
- Discussion on the pressure regulation of the second line of the mixer: the pressure has to be at least 150 mbar lower than the one of the system
- MDT
Reminder:
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- Rack 68 (ch 17): one channel is keeping going to zero —> try to change the ELMB
CMS #1966
- RPC
- OFF
- Modification of purifier filters on-going —> last week and this week
- with T valves, we have only 5. we put a cap for the sixth one
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
- 1 chamber in purge in CO2
- Try to run the system but system was not stable: pump in negative pressure
- 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 #1971
- 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
- TFC temperature pump: ~170 C but it is “normal” with the new pump
- CLOUD
- Discussion on the trace gas MFC and valves
GENERAL
PLC/Software
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