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Discussion about possible ECAL/HCAL in 2026

→ Europe/Zurich
    • 07:00 → 07:20
      Inputs for today's discussion 20m
      Speakers: Hidetoshi Otono (Kyushu University (JP)), Zhen Hu (Tsinghua University (CN))
      Hide_250326.pdf
      Hide_250326.pptx
    • 07:20 → 07:40
      Quick summary from discussion with Jamie 20m
      Speaker: Tomohiro Inada (Kyushu University (JP))
      Yasu_offaxisdetector_20250319_rev.pdf

      Agenda & Discussions

      1. Detector Position and Physics Potential

        • The potential impact from the crossing angle needs to be discussed.

        • Evaluated PID capabilities for nueCC vs. numuCC distinction.

        • Jamie recommended clearly defining fiducial volumes to ensure the containment of neutrino interactions, avoiding energy leakage.

      2. Trigger Rate Concerns

        • Initially predicted trigger rate at ~3.1 kHz, Jamie raised concerns this could realistically reach ~10 kHz.

        • Required adjustments to trigger threshold and efficiency need to be discussed.

      3. Detector Monitoring System

        • Monitoring via Ethernet confirmed, covering temperature and current sensors within detector electronics.

      4. Infrastructure, Dimensions, and Transport

        • Detector's dimensions (particularly width) are critical for transport along the LHC.

        • Heavy steel plates within the detector need disassembly/reassembly at the installation site.

        • Tilted installation surface necessitates a support structure ensuring parallel alignment to the line-of-sight.

      5. Data Acquisition and Integration

        • Challenges discussed regarding the integration of additional scintillator channels and synchronization with LHC clock.

        • Brian highlighted the difficulty of synchronizing different readout systems->no coincidence trigger between on- and off-axis detectors.

      6. Software Calibration and Saturation

        • Current calibration is preliminary?; need precise? calibration for SIPM saturation.

        • Possible need to extend dynamic range due to saturation effects.

      7. Overall Considerations and Risks

        • Jamie emphasized significant learning opportunities from 2026 installation despite potential technical limitations.

        • Clear communication on Installation feasibility is essential.

      Jamie's Main Concerns

      • Precise detector dimensions critical due to transport limitations (maximum width: 110 cm).

      • Necessity for mechanical support ensuring detector alignment parallel to neutrino beamline on inclined floor.

      • Integration and synchronization complexities between detector and additional veto scintillator systems.

      • Importance of including LHC clock signals for accurate event timing.

      • Clarification required on the feasibility of trigger adjustments and potential firmware complexities.

      Action and Checkpoints

      • Obtain and confirm exact detector dimensions and weight details for transportation feasibility. 

      • Define and evaluate a fiducial volume for accurate PID analysis and energy containment. 

      • Clarify and investigate synchronization methods for additional veto scintillator readout with the existing detector system. 

      • Confirm feasibility of including LHC clock and orbit signals into the detector readout system.