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Meeting on mechanical design and integration
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Europe/Zurich
Mainz
Mainz
Saclay/Mainz interface meeting 23/7/25
Clarified at the meeting or since:
- vacuum seal between chapeau and vacuum chamber : evacuate trapped air from sealing channel in the outer flange of the chapeau
- membrane flange : screws connecting air and vacuum -> replace by non-throughgoing screws
- nuts for the rails inside the vacuum chamber : non-magnetic material (titanium; polymer possible?) Ensure nut shape is correct before ordering.
- handling tools (small cranes, fenwicks): Saclay lists its requirements for the installation; MESA workshop will make them available
- beam tube extension
- any welding should be made non-magnetic (cf. beamtube flange). Use non-magnetic welding metal
- upstream end of beamtube extension : connection with accelerator handled by MESA
Still open issues:
- update MESA step file on seafile
- vacuum chamber : please provide manufacturing drawings (meeting between Boris and NTG next week)
- beam tube extension
- material : stainless steel? Aluminum? (-> activation)
- which magnetic permeability tolerance (<1.1?)
- percentage of antimony in shielding rings? check forward shielding rings (which use antimony too), and replicate.
- Chapeau integration:
- distance between chamber and wall?
- can the structure on the wall be dismounted?
- enlarge width between support structures near hall entrance, for access
- vacuum seal between chapeau and vacuum chamber : radiation hardness specifications?
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