Gas systems project

Europe/Zurich
155/R-047 (CERN)

155/R-047

CERN

10
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Beatrice Mandelli (CERN), Frederic Merlet (CERN)

GAS M&O meeting 29 April 2019

Present: Beatrice, Patrick, Roberto, Michal, Andrea, Fred Mara, Gianluca, Luca

Justified: Kacper, LPh

Indico: https://indico.cern.ch/event/815795/

 

ALICE #no elog

From previous meetings:

  • MTR problem with humidifier (with GC we measure 1/3 of H2O with respect to the beginning of the test) —> LPh to investigate

 

ATLAS #no elog

  • RPC Mixer: problem with C2H2F4 MFC
    • To change MFC with a small flow —> Patrick/Kacper

From previous meetings:

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

 

CMS #no elog

  • GEM
    • Pneumatic pipes not in place —> found temporary solution
    • Missing cables CANBUS and PROFIBUS from USC to SGX5 —>Michele/Daniel
    • Valve mounted on the other way in the rack pump!!!
    • Cables without marks —> Patrick needed to re-check everything
    • ELMB test for distribution racks
    • Software will be completed later

From previous meetings:

  • RPC pre-distribution need to modify two racks for RE3.1/4.1

 

LHCb #1789

  • RICH1 in Run with CO2
    • a lot of Air —> to do a purge
    • after the purge to monitor the Air content with the Analysis Chain (O2) and with GC —> Mara
  • RICH2 in Run —> need to start recuperation asap
    • need to install RIX
    • missing one MFM for the membrane —> Patrick
    • to investigate for dry air compressor if it is possible to build with our grease —> Luca
  • MWPC in run with Ar/CO2
    • Rack 64 —> to investigate 
  • OT racks dismounted
    • Some racks in building 21, other racks under RP controls

 

PIQUET

  • Nothing to report

 

GENERAL

  • Presentation of Mara on LHCb RICH2 (https://indico.cern.ch/event/815795/contributions/3405074/attachments/1835476/3007134/lhcbrich2.pdf)
    • 40000 liters of CO2 interjected
    • in total now we have 40% CO2 + 2% Air while in December we had 8% CO2
    • 35000 l of CF4 lost in 4 months!
  • Presentation of Gianluca on CMS Ventilation test (https://indico.cern.ch/event/815795/contributions/3409588/attachments/1835479/3007149/ventilation_test_29_04_2019.pdf)
    • It looks like no effect on RPC were seen (but cavern was not completely closed) 
  • Purifier 3 —> to discuss logic and hardware. Here first drawings: http://eloggas.cern.ch/GASSYSOperation%26Maintenance/1777

 

PLC/Software

  • Discussion of planning
    • CSC and DT need to change the festo module
There are minutes attached to this event. Show them.
    • 09:00 09:10
      LHCb RICH2 update 10m
      Speaker: Mara Corbetta (Universite Claude Bernard Lyon I (FR))
    • 09:10 09:20
      CMS Ventilation test 10m
      Speaker: Gianluca Rigoletti (Universita & INFN, Milano-Bicocca (IT))
    • 09:20 09:25
      Piquet interventions 5m

      http://eloggas.cern.ch/GAS_PIQUET/

      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)
    • 09:25 09:30
      Activities on-going 5m
      Speakers: Beatrice Mandelli (CERN), Frederic Merlet (CERN)
    • 09:30 09:50
      Plan of LS2 activities 20m
      Speakers: Beatrice Mandelli (CERN), Frederic Merlet (CERN), Roberto Guida (CERN)
    • 09:50 11:15
      Gas systems for the LHC experiments
      • 10:05
        ALICE 5m
        Speaker: Louis-Philippe De Menezes (CERN)
      • 10:10
        ATLAS 5m
        Speaker: Kacper Jerzy Kapusniak (CERN)
      • 10:15
        CMS 5m
        Speaker: Andrea D'Auria (CERN)
      • 10:20
        LHCb 5m
        Speaker: Patrick Carrie (CERN)
      • 10:25
        Gas analysis: standard H2O/O2 5m
        Speaker: Louis-Philippe De Menezes (CERN)
      • 10:30
        Gas web-page 5m

        http://test-gasmonitoring.web.cern.ch
        https://ep-dt-gasanalysis.web.cern.ch

        Speaker: Beatrice Mandelli (CERN)
      • 10:35
        Software 10m
        Speaker: Michal Zbigniew Zimny (CERN)
    • 11:15 11:25
      FSU & Jobs status 10m
      Speaker: Frederic Merlet (CERN)
    • 11:25 11:35
      AoB 10m
      Speakers: Andrea D'Auria (CERN), Beatrice Mandelli (CERN), Frederic Merlet (CERN), Louis-Philippe De Menezes (CERN), Patrick Carrie (CERN), Roberto Guida (CERN)