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376/1-020 (CERN)
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- Presentation from Mateusz on alignment dynamic behaviour and cross-talk between degrees of freedom
- Concern on bellows deformation during alignment
- A piece for tests will be soon available [Teddy]
- Calculations [Carlo]
- Would be nice to monitor/test loads at some stage during integration [Mateusz]
- Do not forget that the tank must be misaligned at warm to account for the thermal contraction. Can we confirm the exact number?
- Info from Tom on updated modal analysis
- The aim would be to raise the fundamental mode above 15 Hz (we are a few Hz below)
- Blocking screws for the alignment plate are ok [Tom]
- Alignment plate can be thicker, where possible [Tom]
- The tuner system rotates around the vertical axis. Add blades [Tom]
Shields
- Presentation from Nik with extra penetrations for cable routing and an optimized pipeline
- The 2 concepts (Al vs. Cu) are still developed in parallel. Detailed comparison in slides.
- Cu: bad tolerances, modes close to dressed cavity modes (~15 Hz)
- Al: very high temperature at intercepts locations on pipe (if confirmed, this would be a show-stopper for this concept)
- Plates temperature profile is good in both cases
- Preliminary high stress at pipe-to-plate contact. To be checked with a more realistic cool-down profile and taking into account that the contact may trigger numerical errors (peak values)
- Magnetic: Carlo asked to provide a draft with updated dimensions and penetrations.
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