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201st EATM Meeting

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530/R-030 - BE-EA Conference Room (CERN)

530/R-030 - BE-EA Conference Room

CERN

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Dipanwita Banerjee (CERN), Laurie Nevay (CERN), Silvia Schuh (CERN)
201st EATM Meeting
Zoom Meeting ID
67809509676
Host
Silvia Schuh
Alternative host
Dipanwita Banerjee
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    • 14:00 → 14:05
      News 5m
      • Approval of the 200' EATM Minutes
      Speakers: Dipanwita Banerjee (CERN), Laurie Nevay (CERN), Silvia Schuh (CERN)
      20260602-eatm-minutes-v1.pdf
    • 14:05 → 14:10
      Action items 5m
      Speaker: Dipanwita Banerjee (CERN)
      EATM_ACTION_ITEMS_14_Jul_2026.docx
      EATM_ACTION_ITEMS_14_Jul_2026.pdf
    • 14:10 → 14:25
      Key information from different meetings 15m

      Pre-distributed information + SBA highlights Lazzaroni)
      ECRs
      Planning & Important Dates

      Speakers: Bastien Rae (CERN), Dipanwita Banerjee (CERN), Giulia Romagnoli (CERN), Michael Lazzaroni (CERN), Natalya Kahn
    • 14:25 → 14:35
      MUonE bunched beam request 10m
      Speakers: Umberto Marconi, Umberto Marconi (Universita e INFN, Bologna (IT))
      MUonE Synchronous Muon Beam.pdf
    • 14:35 → 14:45
      LS3 running facilities update – Neutrino Platform 10m
      Speaker: Bastien Rae (CERN)
      EATM201_NP_Requirement.pdf
      EATM201_NP_Requirement.pptx
    • 14:45 → 14:55
      XCED Consolidation Status Update 10m
      Speaker: Krystian Sidorowski (CERN)
      2026.07.14 201st EATM K. Sidorowski.pdf
      2026.07.14 201st EATM K. Sidorowski.pptx
    • 14:55 → 15:05
      Naming change update 10m
      Speaker: Giulia Romagnoli (CERN)
      Naming update of North and East Area - EATM201.pdf
      Naming update of North and East Area - EATM201.pptx
    • 15:05 → 15:25
      News from Experiments 20m
      • IRRAD/CHARM 5m
        Speakers: Federico Ravotti (CERN), Giuseppe Pezzullo (CERN), Salvatore Danzeca (CERN), Salvatore Fiore (CERN)
      • AMBER 5m
        Speaker: Benjamin Moritz Veit (Johannes Gutenberg Universitaet Mainz (DE))
        EATM_report_14072026.pdf
      • NA62 5m
        Speaker: Roberto Piandani (Univ. Autonoma de San Luis Potosi)
      • NA64 5m
        Speakers: Laura Molina Bueno (Univ. of Valencia and CSIC (ES)), Vladimir Poliakov (Millennium Institute for Subatomic Physics at High Energy Frontier (CL))
      • NA61 5m
        Speaker: Bartosz Maksiak (National Centre for Nuclear Research (PL))
        • NA61/SHINE got the beam on last Wednesday, first physics data taking started on Sunday early evening
        • We got the 13 GeV/c beam pretty quickly from Nikos, but we are unable to select protons at that beam momentum due to CEDAR gas unable to be pumped to 11 bar (the pressure saturates at 10 bar). It is due to nitrogen dewar supplying the gas to CEDAR cannot hold higher pressures. We run now at 15 GeV/c.
        • Delay wire chambers have low efficiency. So far we are going to try with increasing high voltages on them (2900 V).
        • New barriers and ladders were installed in PPE152, but we are only partially satisfied. The vertical ladders feel less safe to climb and definitely less safe to go down. We put back our old ladder. We are however happy about the gates that open only towards the concrete platform.
        • VERTEX-1 magnet issue. The magnet cannot hold higher currents due to instabilities in the cryo cooling system. At the moment the magnet makes our 150 GeV/c ion run in August impossible. We cooperate with Cryo team. They plan to make a test tomorrow to confirm one of possible culprits.

         

        A fragment of an e-mail from Nicolas Guillotin summarizing our most recent meeting:

        This year, a first run for VERTEX1 stood in March, from week 10 to 14. Issues were observed concerning the cryostat liquid helium level oscillations on March 15th while operating at 5kA.

        Active investigations were led by TE-CRG after the first run to find the possible reason for this issue.
        A mechanical default on turbine 1 in the cold box was found, on April 24th.
        TE-CRG considered at this moment that the lack of cryo performance was related to this major cold box equipment. The turbine was changed and circuits re-conditioned.

        On May 26th TE-CRG decided to anticipate the cooling restart for VERTEX 1 and to check the performance. During the second phase of cooling, mid-June, while circulating with liquid helium in magnet, we concluded that an issue persisted unfortunately.

        In the meantime, we restarted investigations at cold for all components of our cryogenics system : Compressor, Cold Box and Cryostat.

        We succeeded in quantifying the filling rate of the Cryostat in %/h during the phase of liquid helium filling: about 16%/h for Vertex 2 to be compared to about 5%/h for Vertex1.
        However, it does not indicate the origin of the issue for Vertex1.
        Either it is a reduction of capacity from the cold box, or an increase in consumption (heat load) in the cryostat or even on magnet side. It is unlikely, but not strictly impossible. No known instrumentation on magnet.

        No clear default has been identified yet concerning the compressor, the cold box process, the temperature and pressure setting of the cold box, the turbines nor the valves and no pollution, no clogging.
        A possible candidate could be a cold box insulation vacuum slow degradation.

      • CLOUD 5m
        Speaker: Antti Onnela (CERN)
      • GIF++ 5m
        Speaker: Paolo Martinengo (CERN)

        Ready to take beam from tomorrow

        DIscussed move of chiller + spare, agreed on requirements

        Ordered (David) standard gas pipes, defined specs for heated ones

        Work on gas systems (safety, including ODH in the bunker, visit on Friday) + tent/barack in the pipeline  

      • HiRadMat 5m
        Speakers: Alice Marie Goillot, Nikolaos Charitonidis (CERN)
    • 15:25 → 15:55
      A.O.B 30m
      DIP Presentation at EATM
      Experiments DIP use cases.docx
      Experiments DIP use cases.pdf