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S30XL-LESA/LDMX
******* June 5th, Thursday, update from Stepan
Dear all,
I am happy to inform that HPS chicane magnets are now installed in the
Hall-B downstream alcove.
Many thanks to the Hall-B engineering-technical team for the excellent
work. Great work!
Best, Stepan
Chicane magnets installed 5 June 14.JPG
*******June 4th, Wednesday, update from Stepan "Spectrometer magnet installed"
Analyzing magnet installed 4 June 14.JPG
********June 4th, Wednesday, update from Stepan "Load test of the spectrometer magnet support - magnet will be installed today."
******** June 3rd, Tuesday, update from Stepan "First Magnet Installed"
Agenda:
- Beamline update - FX (photos shown at last Wednesday's meeting)
Installation photos of Frascati magnets and alcove
- Installation and Survey Homework - John (see attachment of draft)
- ASAD Draft - Stepan
ECal Installation and Survey - Raphael
From email 3 June 2014
********************************************************************
Hello,
Here is the plan we have right now, there is still few questions that are left in particular to know if the survey guys will be able to see the targets in this. Also we need to take reference point before hand on the ECal vacuum chamber, that needs to be worked out in little more details, how we do that. Overall the plans are clear and allow to move the ECal in and out relatively easily and get back to the initial position after the first installation.
Installation plan:
Fix rails and top frame
Check parallelism before fixing
Check movement without loading
Fix blockers at the extremities (slightly ahead of final position on the magnet side for safety)
Fix frame below the rails and first threaded rods
Check the mobility of the system along the full length of the rails
Check that distances for the rods match the one on the ECal (i.e. rods are parallel)
Install top ECal
Fix the position of the system
Place two nuts on each rod at high level (second nut is needed for reference position in case of complete dismounting)
Place Ecal below the rods
Take the ECal up through the rods with crane
Fix the ECal in up position with one nut on each rod then add two nuts per rods for later precision fixing
Attach second level of threaded rods
Rods must be in contact inside the connection part
Install bottom ECal
Place two nuts on each rods at a high level
Place the ECal below the rods
Take the Ecal up through the rods with crane
Fix the ECal in bottom position with two nuts per rod
Install ECal vacuum chamber
Release blockers and push the ECal out of the way to its out position
Block the ECal in the out position
Precise positioning of top ECal
Release rail blocker to place the ECal close to the vacuum flange (~mm)
Lower the top ECal slowly (directly with the nuts)
Stop when reaching the mark established on the vacuum chamber
Check that the 4 holding nuts are in good contact
Fix the two nuts below the holding nuts
Precise positioning of bottom ECal
Put the bottom ECal slowly in place(directly with the nuts)
Stop when reaching the mark established before
Check that the 4 holding nuts are in good contact
Fix two nuts on top of the system
Add a bottom nut to fix the holding nut
Install all extra structure intended for rigidity of the system
Survey
Best regards,
- Other?