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MQYYM Assembly preparation
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Europe/Zurich
Participants Juan Carlos Perez, Damien Simon et Helene Felice:
- JCP will send to CEA the reference of the wire used for the quench heaters
- CEA technicians (Romain and Ricardo) will be at CERN the week of 21st to 25th (precise dates and time to be confirmed by CEA)
-Damien will also be at CERN
-the work planned is (in red, CERN equipment to be provided):
- finalization of the ground plane insulation => oven availbility
- check of the resistance of the trace and of teh geometric parameters => 4 wire measuring system typically used at CERN so we can check the process
- preparation of the assembly such as
- practice assembly of the support with the bottom plate
- practice handling of the shipping/tilting fixture ("bobsleig") with a "dead weight", JCP is concerned about the transition from tilted to vertical.
- a complete list has to be established
- the calibration of the coil measuring tooling will restart once the mesuring bar instrum is repaired. schedule will be assessed on a weekly basis.
- discussion about the assembly:
- JCP suggests not to use the rods during assembly of the yoke lamination. The alignment keys will be sufficient to guide the laminations. the rods would add complexity.
- there are no stops planned in the bottom flange for the first bullets. this will have to be added
- the tensionning of the rods need to be assessed. the rods are SS and are expected to shrink 3 mm/m. we need to make sure that we will not plastify them, while assuring the proper compaction factor of the yoke.
- we also need to prepare the shimming plan of the coils: are we planning a different shimming in the straight section and in the ends?
- bullets: JCP mentions that the schedule will be tight to implement bullet gauges. The decision is to continue to look for a solution. if possible it will be implemented, if time does not allow, bullet gauges will not be included.
- procedure preparation: JCP suggests to use a Hl-LHC template for the procedure and to start to write it during the practice assembly next week
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