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Gas systems project
GAS M&O meeting 26 March 2020
Present: Beatrice, Roberto, Andrea, Patrick, Kacper, LPh, Fred, Michal, Mara, Gianluca, Sabino, Fabio, Federico, Leonardo
Indico: https://indico.cern.ch/event/902256/
CHECK Gas Systems
- All OK
GENERAL
- Check alarm levels for PGS —> All gas system responsible
- To prepare a list of sensors not working or missing in PGS —> All gas system responsible
- Check with David for aging test of new sensors used in PGS —> Beatrice
- CMS DT pump: to plan intervention to change the membrane —> Andrea + Kacper
- CMS CSC batteries —> Andrea to keep an eye
- Discussion about new IR module
- The pressure regulator will be only reading in WinCC-OA but it will be possible to regulate it on place with the black display
- Addition of small pump in IR module: still under discussion
- Excel file for alarms prepared weekly by Mara —> Experiment technical responsible to fill
- Excel file for ALICE and ATLAS —> Gianluca to prepare with LPh and Kacper
REMINDER for when we will be back
ALICE
CPV
- We have 3 lines input that are ok, and 3 lines output: in one there is not the return. LPh contacted Yuri
TPC
- In the purifier the small thermic box triggered (also last year it happened) —> Patrick/LPh to check
TRD
- Recuperation: missing two valves but there are present in the software
- 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
MDT
- Check overpressure in MDT chamber when there is a stop-start of the system
- Only one convertisseur, one pump, etc from the system —> Patrick/Kacper to fix
- Found a problem of grounding on pressure sensors: pressure sensors changed. Now to verify if the grounding problem is still there
- Problem in the 2 vaisala of humidifier: several spikes present. Not clear why. Before the software upgrade they were not present
CMS
RPC
- Michal changed the mother board in rack 67: now flow is 170 l/h (elog #2279) —> Andrea to check with new voegtlin red
DT
- Change one motherboard in rack 61 but flow didn’t change (elog #2280) —> to try to recalibrate one set of flowcells
- Difficult to re-start the gas system after power-cut —> to do some tests
- Test for power cut and re-start for the exhaust line —> to do other tests
GEM
- Andrea prepared a drawing for ME0 and check for space in UX —> Andrea to send an email to Michele
CSC
- On-going regulation of PID for the exhaust —> Beatrice
- Warning to set-up —> Beatrice/Michal/Roberto
LHCb
MWPC
- Problem in the GC analysis of the mixer: not visible the correct gas mixture with both LF and HF. Probably an hardware problem (connection, valve, etc) to find —> Mara
- Leak in Mixer and Exhaust. Only in Exhaust found but not repaired. Other not yet founded —> Patrick
RICH2
- To inject Air —> Patrick to check with C. Frei
- To add line for analysis “supply to detector”k
SciFi
- Problem on 3-ways valve —> Patrick
PGS
- Interlock of Ar/H2 does not work —> Michal/Patrick to check
GENERAL
- Alarms/Errors in power supplies for all gas systems —> Patrick
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