GAS M&O meeting 21 July 2022
Present: Beatrice, Roberto, Patrick, Andrea, Michal, Kacper, Mara, Mattia, Gianluca, MariaCristina
Indico: https://indico.cern.ch/event/1183311/
ALICE #4302
ON-GOING:
- TOF: problem of O2 intake à on-going
- TRD: high humidity warnings —> to check purifier —> LPh + Gianluca plot à warning and alarm changed, increase flow of regeneration gas à keep checking
- MID: GC set-up test —> MCA w28-30
NEW:
- CPV: spikes in vaisala + contact company (problem also in other Vaisala)—> LPh w28-29
- MID: to do a fine tuning of flowcell/zimmerli + check 2nd pumpà LPh when access available à w30 (Tuesday 26/07)
- Analysis chain 3 to replace one electrovalve à LPh w30: problem is electrical
- AUX Analysis: feedback from operation with Ar as first line à LPh w29-30
ATLAS #4300
PREVIOUS:
- to check alarm FG and ODH failure with Nicolas Broca —> Gianluca w26-27: on-going
- MDT + ID flushing: vaisala spikes : to check difference between two device (serial number + plot) —> Kacper/LPh w29
- MDT: table of problematic sensors —> Kacper w31
- RPC: old IR to send to company —> Mara w29
- RPC: purifier 2 investigation: waiting for test chamber pressure à w30 Kacper
- RPC: IR to add small black pump to reinject gas à Patrick/Kacper September
- ID flushing: Krohne reading CO2/Air à Kacper/Michal w30
NEW
- RPC: increasing chamber pressures in racks 64-65 as requested by RPC team à Gianluca/Kacper w29-30
- RPC: pump filter replacement à w30 Kacper
- TGC: rack 64 stop due to gas loss: to investigate with ATLAS about logic à Kacper/Gianluca (also for ALICE) w31
- TGC: flowcell replacement à w30
- TGC: high flow to check seat of regulation valves for rack 63 and 67 from 250 l/h to 700 l/h à w30-31
- TGC: humidity envelop gas: where to read the value and inform George à w30
- TGC: humidity envelop dewpoint scale to change à Michal w29
CMS #4281
PREVIOUS:
- CSC: O2 sensor problem to fix —> Andrea w26
- CSC: O2 sensor —> check device with O2 bottle à Andrea/Mattia w28-29 àw30
- CSC: installation of spare pump from workshop —> Kacper/Andrea/Patrick w29 à w30
- RPC:
change of PID for some regulation valves —> Mattia w26 and 27
- RPC Mixer: HF MFC R134a valves to check -> Mara summary w29 à Kacper w30
- RPC: IR swap with one ok for aging and then check IR calibration —> Andrea/ /MCA w29 à w30-31
NEW
- CSC: swap of CF4 batteries à w29
- CSC: Andrea to check bottle CF4 in PGS
- CSC CF4 recovery: to check with 10% CF4 à MCA/Roberto w29
- DT flowcell to check on Tuesday access à Michal/Andrea w30
- RPC Purifer 2: change recipies deltaP Phase1 0.04 bar à Mattia w29
- RPC Purifer 2: check flow during Phase2 à Andrea w29-30
LHCb #4291
- RICH1: summary of test performed + conversion mass/flow —> Maria Cristina w27
- RICH1: preparation installation Vaisala: supply to detector à Patrick w31
- RICH1: injection 2022 vs 2018 à Beatrice w30
- RICH1/2: test emptying purifier —> MCA/Beatrice w29-30 à on-going
- RICH1/2: gas loss calculation to add in software à Michal w30
- RICH2 IR: MFC and YC9125 normally open à to check Patrick w29-30
- RICH2 IR: to check operation à Beatrice/Patrick w31
- RICH2: mixer injection to check MFC range à Patrick w30
- RICH2 Purifier lifetime now 5 days, to put 7.5 days à Patrick w29-30
- RICH2 Purifier recuperation logic to check à Beatrice/Michal w29-30
- SCIFI: to check VAISALA with calibration bottle à Patrick w30
- MWPC exhaust MFC fluctuating —> Mara w27 à summary w29 Mara
GENERAL
ON-GOING
- Webmass problem: to verify how to receive an email in case of problem and to buy new spares à Michal
PREVIOUS
- ANALYSIS CHAIN: to have Ar and to put in long cycle before O2 and H2O calibration (software) àfeedback from Gianluca/LPh w29 à w30
- Aging test vaisala —> <ara w26
- to buy 2x O2, 2xH2O, 2xIR RPC calibration bottles for each site à all
- Summary of Omron MFM à Mattia w30
- Short and long cycle time to fix in Analysis chain à Michal w28-29 àw30
- (UNICOS)UnCritical alarms to check with Michal à ALL w31
- To check for flammable gas and ODH alarm in piquet phone à Patrick/Andrea/Gianluca w30-31
- Purifier cartridge 24 liter to do à Andrea September
PIQUET
- ATLAS RPC rack 66 chamber pressure
- TGC stop rack 66 due to gas loss
- TRD H2O line 145 HH à fixed
WARNING/ALARMS
- ATLAS IDEP: several warning/alarms received à Kacper w29
TS September
- CMS RPC: change seat regulation valve group 3
- CMS DT analysis rack installation (start in MD)
- CMS GEM: installation of 1 um filter in common supply and return (stop of system needed)
- CMS GEM: replace zimmerli mixer
- LHCb RICH1 cleaning (start in MD)
- LHCb UT commissioning???
- ALICE MID: to do a fine tuning of flowcell/zimmerli + check 2nd pumpà LPh when access available
EYETS
- ATLAS TGC: change valve or seat to increase flow
- CMS CSC: movement of exhaust regulation valve in USC
- CMS RPC: new filters for distribution racks
- ALICE TPC: back in error
- ALICE TOF: investigation of air intake: pump leak test
- ALICE TRD: change purifier material to add MS to absorb H2O