Engineering meeting at PSI

WWHB/116 and PiE5 (Paul Scherrer Insititut)

WWHB/116 and PiE5

Paul Scherrer Insititut

Frank Meier Aeschbacher (PSI - Paul Scherrer Institut), Frederik Wauters (Johannes Gutenberg University Mainz)

Infrastructure/engineering focused meeting, with PSI and Heidelberg Technical staff + sub-system responsables. 

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Dinner at L'Ulivo in Brugg, Bahnhofstrasse 5 at 18:30. From those we stay at PSI: Bus 376 to Brugg leaves PSI west at 18:06. A bus back to PSI at 20:05, 20:35, 21:35, 22:35, 23:35.


    • 2:00 PM 3:40 PM
      Mu3e infrastructure WWHB/116 (Paul Scherrer Institut)


      Paul Scherrer Institut

      Discussion during presentations:

      Mu3e flanges:

      • demonstrator existing and in use for integration & cosmic run
      • Souriau connectors proved to be functional for LV
      • LEMO connectors in use turned out to be prone for damage and leaks, replace by something more durable
      • Discussion about connecting cables at the inside to the flange:
        • no patch panel foreseen for power at SSW
        • cables permanentely connected at DCDC and backplane
        • flange mock-up in HD planned to test if attaching souriau connector is possible despite the helium lines present


      • Tile Detector
        • require -14°C matrix temp. at the end of phase I (require more current than can be provided by HV boxes)
        • this mean -20°C needed at module inlet
          • lowest temperature inside magnet is even lower >> to find out
        • 1.4 l/min per station enough >>> pressure diff. 0.3 - 0.6 bar
        • coolant is an open issue
        • System:
          • Distribution of 7 flow channels needed inside magnet
          • Piping inside magnet: Silicon pipes from distributor box to modules until now, material has to be reconsidered
          • Flow adjustment most probably not needed inside volume
          • Request: Independent in- and outlet for SciFi and Tiles (means more feedthroughs needed)
          • Idea for flow channels: Inlet and outlet at same side. Guide tubes along cage to have access to US and DS from a single main inlet channel
          • US: 1x KF50 feedthrough for Helium is unoccupied and can be used for additional cooling pipes
          • DS: 1x KF100 feedthrough for Helium is unoccupied (relevant?)
      • SciFi Detector
        • at detector: 2 pipes in, 2 pipes out  - on each side
        • target temperature: -20°C (100 W per side)
        • need to thermally decouple SciFi cooling block & beam pipe
        • open question: which temperature is reached at SiPMs?
        • isn't the Cooling block a good heat exchanger for the surrounding gas? is 100 W enough as estimate?
        • Holes for Vertex detector can be integrated when diameter at 3 mm, not 4 mm
        • Interlock signal from temperature sensors possible?
          • circuit for a temp. diode for MuPix is existing for the DCDC boards
          • something similar could be realized "in principle" also for SciFi when compatible
          • what respone time is needed? >>> not needed within a second
        • Readout cables for temperature readout at cooling block should be foreseen in the list to mount on beam pipe
      • FEB and other electronics
        • SSW: 60 FEBs and 60 DABs per side
        • 1 back plane design (quarter rings) for US and DS
        • on each SSW 4 inlets & 4 outlets for water connections
        • design of a manifold connecting this 4 inlets (outlets) to a single tube that is connected then to the flange plate
          ---> where exactly is the fibre patch panel going to be installed? Simon will contact Nik
        • question by Simon: What else needs to pass through the two cutouts in the SSW? (in addition to Simon's SSW cooling)
        • all systems should try to add some piping/cabling in CAD if possible
      • Chillers etc.
        • Huber suggested a Unistate system
        • Choice of fluid still pending. PSI should evaluate whether the available coolants.
        • cooling temperature at chiller down to -40°C possible
        • Big advantage: Pilot One >>> provides many interfaces, easy to monitor & control
        • Huber system for FEB and Scintillator cooling, same interface, compatibility
        • leakless circuit?
          • when on skywalk/balkony not possible
        • The SciFi/Tile chiller is requested to stand in the area. Needs to be discussed with AK.
        • The big chiller for the He system:
          • Can it go cold?
          • Coolant?
          • Space enough?
        • pipes from balcony available from Huber which are isolated. How long? Integrate chillers in Michael Tröndle's 3d printed mock-up
    • 3:30 PM 4:00 PM
      Coffee 30m Timeout


    • 4:00 PM 5:00 PM
      Mu3e infrastructure WWHB/116 and PiE5

      WWHB/116 and PiE5

      Paul Scherrer Insititut

      • 4:00 PM
        Discussion 1h
        Speakers: Andreas Hofer (PSI - Paul Scherrer Institut), Bernd Stefan Windelband (CERN), Frank Schumacher (Universität Heidelberg), Frederik Wauters (Johannes Gutenberg University Mainz), Malte Hildebrandt (PSI - Paul Scherrer Institut), Simon Muley (Physikalisches Institut Heidelberg), Thomas Theodor Rudzki (Physikalisches Institut Heidelberg)
    • 6:30 PM 7:30 PM
      Dinner 1h l'Ulivo


      Bahnhofstrasse 5, 5200 Brugg
    • 9:00 AM 10:30 AM
      Infrastructure discussion in the Area PiE5 (Paul Scherrer Institut)


      Paul Scherrer Institut

    • 10:30 AM 10:50 AM
      Coffee 20m timeout


    • 10:50 AM 12:00 PM
      Close out session WWHB/116


      • 10:50 AM
        Discussion and close out 20m
        Speakers: Andreas Hofer (PSI - Paul Scherrer Institut), Bernd Stefan Windelband (CERN), Frank Meier Aeschbacher (PSI - Paul Scherrer Institut), Frederik Wauters (Johannes Gutenberg University Mainz), Thomas Theodor Rudzki (Physikalisches Institut Heidelberg)