Einstein Telescope Main Arm Cavity Tunnel Design Requirements
Explore the detailed design requirements and assumptions for the main arm cavity tunnel of the Einstein Telescope. Covering aspects such as beampipe dimensions, support systems, tunnel diameter envelopes, and considerations for installation and safety systems.
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Presentation Transcript
Einstein Telescope ET-PP WP5 - December 19, 2024 2L design requirements and assumptions for the main arm cavity tunnel diameter Patrick Werneke ETO Taskforce Pisa, February 18, 2025
Einstein Telescope Taskforce - February 18, 2024 Design requirements and assumptions for the main arm cavity tunnel Baseline Beampipe length = 20 meter Longer pipes need more space, but less underground welding joints Risk and cost optimization of the pipe length will be needed
Einstein Telescope Taskforce - February 18, 2024 2L design requirements and assumptions for the main arm cavity tunnel Beampipe Outer diameter envelope Inner diameter Wall thickness (4), stiffener height (50), thermal insulation (100), misalignment (25), tolerances Beampipe to tunnel wall = 500 mm (request for welding tool and inspection) Beampipe support system envelope Space between beampipe and tunnel wall (500) 150 mm on the inside of the tunnel from the Beampipe Outer diameter envelope Transport = 1500 mm Safe passage = 700 mm = 1300 mm = 1000 mm
Einstein Telescope Taskforce - February 18, 2024 2L design requirements and assumptions for the main arm cavity tunnel Baseline arm tunnel diameter envelope: 5800 mm 5800 3800 300 1000 500 500 1000 300 700+1500 2200
Einstein Telescope Taskforce - February 18, 2024 2L design requirements and assumptions for the main arm cavity tunnel 1. Beampipe OD: 1300 2. LF minimum beampipe r: 1000 800 (ECR)? 3. Beampipe to tunnel wall: 500 400? 4. Inside support: 150 100? 5. Transport and safe passage: 2200 1700? 5000 3200 1700 250 1000 400 400 1000 250 Tunnel diameter envelope: 5800 5000? But also space is needed for: Installation of the beampipes is 1700 enough? Transport of the FC Towers! (Tunnel or Shaft?) HVAC, Cabling, safety systems
Einstein Telescope Taskforce - February 18, 2024 2L design requirements and assumptions for the main arm cavity tunnel Concluding 2L: 2L baseline = Possibilities to reduce part of the tunnels to 5000 mm Transport of FC Towers sizes (impact FC tunnel size or shaft at 5km)* Space for installation or repair of beampipes* HVAC and cabling not yet taken into account * Safety * 5800 mm
Einstein Telescope Taskforce - February 18, 2024 2L design requirements and assumptions for the main arm cavity tunnel Larger FC Tunnel 5km + 10km smaller tunnel 3200 3200 1700 1700
