Gas systems project
GAS M&O meeting 02 April 2020
Present: Beatrice, Roberto, Andrea, Patrick, Kacper, LPh, Fred, Michal, Mara, Gianluca, Sabino, Fabio, Federico, Leonardo
Indico: https://indico.cern.ch/event/904368/
CHECK Gas Systems
- All OK
ALICE
- Ne level alarms to change
- List excel done with Gianluca
- GC analysis of TOF are ok: they are as expected
ATLAS
- N2 Dewar refilled
- Excel check-list on-going
CMS
- CSC battery almost finished but second one is there. 2 new batteries will arrive next week
- Elog 2368: started to check if the exhaust pressure regulation
- DT pump: to plan intervention to change the membrane —> Andrea + Kacper
LHCb
- PGS alarms blocked for gases not used
GENERAL
- Beatrice checked with David for aging test: all new sensors of Airliquid have to go through aging test
- Geraldine did some test of PGS alarm to have the name of the building in the SMS (needed for David’s equipe)
- Discussion on SMS for warning
Actions:
- Prepare a list of sensors in force mode —> Experiment technical responsible + Mara/Gianluca
- To look at alarms and warning for the gas system ON —> Experiment technical responsible
- To prepare a list of sensors not working or missing in PGS —> Experiment technical responsible
- Excel file for alarms prepared weekly by Mara —> Experiment technical responsible to fill
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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