GAS M&O meeting 20 May 2019
Present: Beatrice, Patrick, Andrea, Fred, Gianluca, Kacper, Mara, Luca, Roberto
Absent: Michal, LPh (sick leave)
Indico: https://indico.cern.ch/event/820841/
ALICE #no elog (LPh in sick leave)
- MTR modification: under discussion with Arturo —> No manpower to install the pipe and cable until July —> LPh to follow up
- Next week upgrade PLC for TOF
Reminder:
- MTR problem with humidifier (with GC we measure 1/3 of H2O with respect to the beginning of the test) —> LPh to investigate
ATLAS #1814
- RPC
- Now ok with new R134a MFC with low flow
- TRT
- They need new pipes in distribution racks —> next week—> Kacper
- TRT envelop problem solved: TRT people uploaded the wrong config file
- Valve island
- Valve islands for MDT to install this week for 4 racks (which is for one panel).
- One panel is together with RPC, so it has to be postponed
- Idea is to do 4/5 panels this year
- TGC
- Missing 18 V power supply —> not reading of flow of CO2 —> Kacper/Patrick to check (pending since 06/05)
- We need to add 48 flowcells for the NSW: do we have them? —> Fred to follow up with Michal
Reminder:
- Flowcell for new RPC racks —> Kacper to give the flow necessary —> to decide if 3 or 5 mm
CMS #1811
- DT
- Differential pressure sensor mounted —> missing electrical connection —> next week —> Andrea/Patrick
- They think to have a deviation in MFC of low flow —> to keep in mind
- RPC
- Modification of piping for injection mixture from purge
- Need to change the MFC of R134a with the one of ATLAS: piping to modify
- Andrea discussed the fittings for the dummy chambers. Idea is to have the pressure sensors at the output of the dummy chamber —> to check together 23 May
- SX5 mixer
- GEM
- Missing quicks in GE2/1
- Purge and back-up in CO2 installed in gas room (used TOTEM line)
- ZEC finished piping in USC
- Ar and CO2 MFCs to change with the new one and to install safety valve in distribution rack
- GE positive side will be installed on 13/06
- Other
- Problem with PGS in SF6 in the scale of battery (13/05) —> Michal to investigate —> problem still there
LHCb #1813
- RICH1
- in Run with CO2
- to monitor the Air content with the Analysis Chain (O2) and with GC for N2 (every two weeks) —> Mara
- it seems we are already taking Air
- Some joints in RICH1 detector were damaged (http://eloggas.cern.ch/GASSYSOperation%26Maintenance/1815)
- RICH2
- In Run
- RIX pipes in high pressure is ok
- Leak in a valve in the high pressure line —> to fix next week
- Battery full of N2 —> to empty and clean with CO2 —> Patrick
- Check maximum flow that we can send to compressor —> Luca
- For week 22: modify piping to have membrane + purifier and add remote control of the compressor
- OT
- SG racks can be sent in Meyrin
Reminder:
- MWPC in run with Ar/CO2
- Rack 64 —> to investigate
PIQUET
GENERAL
- Add folder in GasGroup for the technical documentation —> Beatrice
- Discussion on the exhaust module
- ALICE MTR: add zimmerli in Mixer and module electrical for the mixer. Ok for the exhaust: test during PLC change
- ALICE TOF ???
- CMS CSC, DT, RPC: to do before PLC upgrade
- Mixer Zimmerli+ rotameter control —> to do all together in one system
- Discussion on Zimmerli in exhaust
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