GAS M&O meeting 11 March 2019

Present: Beatrice, Fred, Patrick, Andrea, Michal, Roberto, LPh, Kacper, Luca

 

ALICE #1726

• Preparing pipes for the TPC clean room —> to do this week or max the next
• MTR: test still on-going. 
• HMPID: safety valve mixer changed
• MTR back-up: it has to be Freon —> LPh to check
• MTR back-up is done with pressure reducer+rotameter: to check pressure when it opens 

 

ATLAS #1728

• Starting some mechanics for RPC distribution racks 
• Flowcell for new RPC racks —> Kacper to give the flow necessary —> to decide if 3 or 5 mm
• ID flushing maintenance in w12/13

 

CMS #1724

• RPC and GEM distribution racks almost completed —> negative side to send by end of the week
• RPC distribution flowcell: verification cable and resistance for the rack in the workshop: file excel in Gas_Group/DistributionRack prepared by Patrick
• Dummy chamber: to add the new flowcell to each manifold —> to start with racks in the surface —> Andrea to coordinate with Patrick
• No quick on the manifold —> leak test postponed when the quick will arrive (so it will be done in the cavern)
• Electrical chassis will be added at the end of the installation in the cavern
• GEM pre-distribution and pump module in place —> missing pipes and cabling
• Dummy chamber —> Beatrice too check with RPC people
• DT ELMB reading card problem: no reading of the flow since 22th Jan (email from Daniel). DT ELMS Status: red square due to PowerSupply new logic —> it will be changed with new software
• Valve island/pneumatic pipes —> need to stop RPC system for 2 weeks —> to coordinate with some standard maintenance 

 

LHCb #1727

• RICH1 buffer ready —> waiting to have access in the cavern (priority to dismount detectors)
• RICH2 batteries test —> done at 200 bar (valide for 140 bar)
• RICH2 old compressor: asked to disconnect water and then dismount it —> this week
• RICH2 compressor: to decide the way to recuperate gas —> Beatrice/Patrick to discuss
• GEM stopped
• SciFi: trolley ready, cabling done, leak test done. Missing software —> Michal this week
• MWPC rack 64 there is a problem in the distribution rack: since mid January there were 200 l/h less —> Patrick to investigate with LHCb people

 

PIQUET

• Nothing to report

 

GENERAL

• Kacper to present the list of Krohne for Exhaust to check what we really need to change
• Back-up with TESCOM —> to check where we have them in the back-up systems
• Red pneumatic valves: several types of leaks and not spare pieces available on the market —> move to Swagelok when we need to change
• Pressure sensor on filter for pump —> Kacper/Andrea to see. Two options: replace with the new inox (large surface) or keep the glass one

 

PLC/Software

• Elog for CMS RPC PLC #1712
• Profibus card: delay of maximum 3 weeks. In the meanwhile we use some cards from Marc
• MCH PLC replacement/software: done but some bugs to fix
• Next systems to do: CPV and TOTEM + debugging
• 301 and 303 (on the mixer) are not supported for new WAGO  and there is problem with new software —> need to change —> Patrick
• Excel file about CMS RPC distribution pressure sensor done by Patrick:  Gas_Group/CapteurDePression/2019 —> Beatrice/Patrick to check