Skip to main content

RICH1 gas system status

Europe/Zurich
20/1-004 (CERN)

20/1-004

CERN

15
Show room on map
Beatrice Mandelli (CERN)

LHCb RICH1 recuperation system

Present: P. Carrie, G. Rigoletti, D. Galassi, MCA, P. Vanseler, M. Busato, B. Mandelli

https://indico.cern.ch/event/1372640/

 

Standard and new gas system

  • drawings from Mattia B.
  • update on mechanical status from Damiano
  • 5 module: 2 racks system, 1 rack compresso, 1 tank, 1 lauda

 

Urgent:

  • modification water pipes —> Patrick/Pieter
  • electrical line for Lauda (400 V, 32 A) —> Patrick

 

Missing:

  • filter for compressor
  • positioneur box for the valves —> Patrick/Gianluca to check for profibus PA
  • wrong zimmerli received
  • one MFC 4-20mA and one Profibus —> need profibus cable
  • equalising tank
  • two valves valco for cryogenics
  • equalising tank
  • to modify drawings: bypass of the tank, lines from exhaust to reinfect at input compressor —> Damiano/Mattia
  • mixer GEM to use for test —> to control with flowbus —> Patrick/Gianluca

 

Steps:

  • electrical box —> Patrick  2weeks elec
  • week 6 to build the common part
  • build new system —> 2-3 weeks of 2 persons —> Mattia and Damiano
  • plan of the SGX8 for the new system —> Patrick/Damiano
  • installation of special electrical power (32A) for Lauda —> Patrick
  • socket for PLC —> Patrick
  • install missing pieces
  • leak test in the workshop
  • installation in place —> 3 weeks mec/weld
  • electrical connection —> 2 week elec
  • insulation —> company
  • software

 

Modification gas recirculation system

See minutes in indico page

There are minutes attached to this event. Show them.
    • 14:00 14:20
      New "old" Gas recuperation system status 20m
      Speakers: Damiano Galassi (Politecnico di Torino (IT)), Maria Cristina Arena (Pavia University and INFN (IT)), Mattia Busato (CERN), Patrick Carrie (CERN)
    • 14:20 14:40
      New distillation column recuperation system 20m
      Speakers: Damiano Galassi (Politecnico di Torino (IT)), Maria Cristina Arena (Pavia University and INFN (IT)), Patrick Carrie (CERN)
    • 14:40 15:00
      RICH1 modifications 20m
      Speaker: Patrick Carrie (CERN)
    • 15:00 15:20
      RICH1 questions from Christoph 20m

      RICH1:
      When the gas system stopped, we had rather large pressure excursion. Is there a way to minimize such of behavior?
      Looking to the relative humidity (dew point) inside the purifier (with the prob installed in 2022), one doesn’t see the same trend as the O2 prob. Any idea?
      Is this prob measuring the RH in vapor phase?
      If I’m right, the conversion from % to dew point temperature is done for air? Shouldn’t be better to express it in % RH ?
      Would you have a factor conversion from % RH to the water content in the C4F10?
      I’m wondering why the fraction of O2 is larger than 20 % of the N2 ? O2 is about 50% of N2. Does it mean the membrane separate better the N2 than O2?

      Speakers: Maria Cristina Arena (Pavia University and INFN (IT)), Patrick Carrie (CERN), Pieter Vanslambrouck