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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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Straw bi-weekly meeting
Zoom Meeting ID
62184092363
Host
Hans Danielsson
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    • 09:00 → 10:40
      Updates 1h 40m
      • Update on design and drawings 20m
        Speaker: Vincent Clerc
        SHIELDING.pdf
        SHIELDING.pptx

        Shielding order:

        • aluminium tube
        • cylinder - kapton
        • cylinder - copper
        • copper arc 

         

        Double the amount of flaps.

        The frequency should be above the working frequency of the preamplifier = a couple of GHz -> <6 cm apart. 

      • Short prototype news 20m
        Speakers: Michal Zamkovsky (Universite Catholique de Louvain (UCL) (BE)), Zdenko Hives (CERN)
      • Intermediate prototype news (4 long straws) 20m
        Speakers: Michal Zamkovsky (Universite Catholique de Louvain (UCL) (BE)), Zdenko Hives (CERN)
        protoSTRAW_presentation_2026_07_07.pdf

        Timepix4 RO - ~6k CHF

      • Update on electronics 20m
        Speakers: Johan Morant (CERN), Peter Lichard (CERN)
      • Long prototype news (124 long straws) 20m
        Speakers: Antonio Goncalves Martins De Oliveira (CERN), Francois Garnier (CERN), Hans Danielsson (CERN), Zuzana Kucerova (CERN)
        • gluing tools QC ongoing
        • HV plugs and HV caps ordered - delivery in September, then metalisation
        • crimp tubes QC ongoing - some blocked, but possibly recoverable (material stuck in the hole, sometimes can be pushed out)
        • gas manifold QC ongoing
        • spacer fixation parts ordered - delivery in 3 weeks
        • spacers production ongoing
        • need to test soldering of copper shielding arc and copper-kapton cylinder, test of drilling into 4mm aluminium
        • change support pin M5 to M4 (both inner and outer thread)
      • FCC 20m
        Speaker: Michal Koval (Charles University (CZ))

        Detector concepts meeting yesterday: https://indico.cern.ch/event/1681937/

        • Bunch spacing preferred by the machine (due to electron cloud): 4 bunches separated by 5ns, then 80ns empty. 
          • "The unambigous association of a reconstructed final state to a specific bunch crossing remains a strict requirement."
        • This has consequences for detector design (e.g. neutral final states in calorimeters, maybe adding timing layers for charged particles).
          • In my opinion, better trailing time resolution for D=5mm straws should be an advantage over D=10mm. But this should be demonstrated using simulations.