Gas systems project

155/R-047 (CERN)



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Beatrice Mandelli (CERN), Frederic Merlet (CERN)

GAS M&O meeting 25 March 2019

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

Absent: Andrea, Michal. Justified: Fred, LPh



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



  • Nothing to report



From previous meeting:

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



  • 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)
There are minutes attached to this event. Show them.
    • 09:00 09:10
      Maintenance procedures 10m
      Speakers: Frederic Merlet (CERN), Luca Graziani (CERN)
    • 09:10 09:20
      List of Krohne exhaust and filter of pump module 10m
      Speaker: Kacper Jerzy Kapusniak (CERN)
    • 09:20 09:30
      Summary of ATLAS RPC test 10m
      Speaker: Mara Corbetta (Universite Claude Bernard Lyon I (FR))
    • 09:30 09:35
      Piquet interventions 5m

      Speakers: Andrea D'Auria (CERN), Beatrice Mandelli (CERN), Frederic Merlet (CERN), Louis-Philippe De Menezes (CERN), Patrick Carrie (CERN), Kacper Jerzy Kapusniak (CERN), Michal Zbigniew Zimny (CERN)
    • 09:35 09:40
      Activities on-going 5m
      Speakers: Beatrice Mandelli (CERN), Frederic Merlet (CERN)
    • 09:40 10:00
      Plan of LS2 activities 20m
      Speakers: Beatrice Mandelli (CERN), Frederic Merlet (CERN), Roberto Guida (CERN)


    • 10:00 11:25
      Gas systems for the LHC experiments
    • 11:25 11:35
      FSU & Jobs status 10m
      Speaker: Frederic Merlet (CERN)
    • 11:35 11:45
      AoB 10m
      Speakers: Andrea D'Auria (CERN), Beatrice Mandelli (CERN), Frederic Merlet (CERN), Kacper Jerzy Kapusniak (CERN), Louis-Philippe De Menezes (CERN), Michal Zbigniew Zimny (CERN), Patrick Carrie (CERN), Roberto Guida (CERN)
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