GAS M&O meeting 25 March 2019

Present: Beatrice, Patrick, Roberto, Kacper, Mara, Luca

Absent: Andrea, Michal. Justified: Fred, LPh

Indico: https://indico.cern.ch/event/807395/

 

ALICE #1749

• MTR test finished: gas system stop

From previous meeting:

• Starting installation of pipes for the TPC clean room, few problems
• CPV to check space for humidifier —> LPh to check with Arturo
• MTR back-up: to modify with Freon (now is Ar) —> LPh to check with Arturo
• MTR: to add a pressure sensor on the top of the chambers (to foresee pipe, cable and remember that is ATEX)
• MTR back-up is done with pressure reducer+rotameter: to check pressure when it opens 

 

ATLAS #no elog

• RPC distribution construction started
• Some safety valves to check

From previous meeting:

• Flowcell for new RPC racks —> Kacper to give the flow necessary —> to decide if 3 or 5 mm

 

CMS #1747

• Discussion about Tracker Analysis rack —> Roberto will discuss with Andromachi

From previous meeting:

• Need to stop RPC 2 weeks —> after Easter, to coordinate with some maintenance
• Purifier 1 (H2O) has a cycle of 1 day —> purifier number 2 has to become with H2O —> need to add the cooling
• Purifier to add the new filter in inox
• Purifier to discuss this week when to do all modifications

 

LHCb #1737

• RICH1 buffer in place, need to be connected (need FSU)
• RICH2 old compressor moving on Wednesday 
• RICH2: need to test the membranes. Krohne range too high (400-4000 l/h) —> substitute with MFM for the test
• Need help of LPh to test the membrane
• MWPC+OT distribution racks in RP control
• MWPC leak? to check with by-pass of chambers
• SciFi trolley: missing only software —> to be ready by next week —> Michal

 

PIQUET

• Nothing to report

 

GENERAL

• Krohne exhaust (https://indico.cern.ch/event/807395/contributions/3361843/attachments/1817138/2970474/25-03-2019_GAS-reunion.pdf) —> Kacper
  • Kacper show the status: 7+2 Krohne to change
  • Kacper found dirty stuff in the ID flushing Krohne —> to check the CMS CSC Krohne
• Filters for pump module (https://indico.cern.ch/event/807395/contributions/3361843/attachments/1817138/2970475/25-03-2019_GAS-reunion2.pdf) —> Kacper
  • To check if it makes sense to add a filter also in the by-pass or do only by-pass. Filter is ~ 1kCHF
• Maintenance procedure (https://indico.cern.ch/event/807395/contributions/3360340/attachments/1815847/2970453/Experiment_Maintenance.pdf) —> Luca
  • Luca show P&DI drawings with highlight elements where maintenance was done in 2018 
• ATLAS RPC test regulation valve (https://indico.cern.ch/event/807395/contributions/3361844/attachments/1817190/2970565/ATLASRPC_FLOWCELLS_GASMEETING.pdf) —> Mara
  • Overview of the test performed by Mara, Kacper, Luca and Roberto
  • Still to test: effects of valve V wrt normal valve, regulation of needle valves

From previous meeting:

• Back-up with TESCOM —> to check where we have them in the back-up systems

 

PLC/Software

• HMPID: problem with Profibus connectors (damaged) —> changed
• Patrick show an example of Profibus testing (in DFS: Gas_group/Profibus test 2013/2018 rapport profibus test sur site)