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Straw bi-weekly meeting

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20/1-004 (CERN)

20/1-004

CERN

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Hans Danielsson (CERN)
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    • 09:00 → 10:00
      Updates 1h
      protoSTRAW_presentation_2026_03_17.pdf

      Short prototype:

      Zdenko:

      • new shielding installed on the prototype
      • the source can be put inside: Sr on top of the upper scintillator, Fe upside down underneath the straws
      • gas tightness test revealed loss of Argon (and possibly pollution with air) after 14h (both HV boards are new) - but not all screws are in the board

       

      Peter:

      • testing the old boards because of oscillations

       

      Hans:

      • it would be good to have a leak detector

      Intermediate prototype:

      Tonio&François:

      • preparatory work to be done before gas panel installation in the new lab (rack for bottles outside, piping, ...)
      • we can reuse some valves from NA62

       

      Zuzana&Hans: 

      • tooling needed for wiring, (the idea) to be reused also for the long prototype
      • gas panel installation in the new lab - under preparation

       

      Michal:

      • will prepare a cover/shielding in 3 parts

      Long 124-straw prototype:

      Temur: 

      • ~70 straws delivered, some 2.4m, some shorter (spares)
      • 2.4m straws were pressurized at 6 bar
      • some straws are slightly bigger (~10-20um)
      • will try with a new machine, first with 19um tape, then with 12um
      • Tonio will give one 19um tape

       

      Zuzana&Hans: 

      • 500 crimp tubes from Minitubes delivered
      • straw plugs from Vink delivered
      • placed an order for HV plugs and HV caps (Vink, DK)

       

      Tonio&Francois:

      • ordered screws, washers and other small parts