Introduction

Objective:

• The primary goal is to install the AHCAL detector during the winter shutdown period between 2025 and 2026 to:
  • Gather valuable data from 2026.
  • Provide essential input for upgrades in the next round of detectors (Run4).

Installation and Logistics Planning

• Detector Specifications and Challenges:

  • The AHCAL detector has a significant weight of approximately 5 tons.
  • Due to crane limitations, the detector may need to be shipped as a whole unit, then disassembled and reassembled at the installation site.

• Installation Timeline:

  • There is a narrow time window available during the winter shutdown between 2025 and 2026.
  • Discussions mentioned potential installation windows:
    • Mid-December or early January for tunnel installation.
    • Surface commissioning planned at a designated site (EHN1) starting around September.
  • Shipping from China is tentatively scheduled for the end of June or the beginning of July, allowing for 2–3 months of commissioning prior to installation.

• Logistical Considerations:

  • Transportation challenges include ensuring safe handling of the heavy detector and managing the additional shielding needed near the beam pipe.
  • Coordination between USTC, CERN, and Japanese teams is necessary to finalize the schedule and logistics.

Commissioning Discussion

• Commissioning Strategy:

  • The discussion emphasized the importance of starting commissioning as soon as possible, even if not all teams can be present on day one.
  • There was a suggestion that the commissioning should be initiated at USTC, with some teams joining later due to scheduling constraints (notably, Japanese fiscal year considerations may delay full participation until April).