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Size: 3680
Comment:
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Size: 3240
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
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| == 2017-09-04 == | == 2017-09-25 == |
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| * --(Crane out SF.)-- * --(Raise BF cap and retrieve lost hex cable clamp PEEK piece.)-- * --(Crane in SF.)-- * --(Install SF-BF rod with hex cable clamp.)-- * --(Route cables via hex cable clamp up to below SF.)-- * --(Adjust BF ballast mass for total weight and pitch/roll.)-- * --(Look for missing screw from SF damper Cu segment in washed screws bag and reinstall.)-- * --(Adjust yoke on SF to put top of secondary at 6 mm above top of baseplate (or to give ≈0 counts at nominal height).)-- * --(Calibrate SF LVDT.)-- * --(Install SF main ballast mass.)-- * --(Cable and test SF fishing rod stepper.)-- * --(Add SF cap.)-- * Lift and weigh SF/... section. |
* Move in-air cabling and feedthroughs and reconnect in-vacuum cables (through Cu O-rings). * Fix #1 geophone adapter cable. * Fix broken pico adapter cable? * Debug all electronics, starting with IRM OSEMs. * Unlock IP; use jacks and FRs to center. * Check IP yaw. * Recheck centering of suspension in assembly frame. * Measure IP period; adjust ballast mass. * Calibrate IP LVDT sensing against IP LVDT actuation, IP FRs. * LBB stuff (see below). * === LBB Sequence * Unclamp LBB ring sandwich; fully suspend Cu ring. * Unscrew LBB from tank brackets. * Hook LBB. * Remove TBD amount of spacers from between LBB and tank brackets. * Set LBB blade stops to nominal height. * Extend foot screws on LBB to just barely support LBB. * Adjust height of LBB magnet ring to set proper gap (4 mm??). * Retract LBB foot screws. * Add temporary ballast to LBB until LBB blades just barely sink below stops. * Check distance from LBB to main beam height (or other suitable reference); adjust by screwing receptacles. * Set foot screws to give ≈5 mm (or TBD) movement range of LBB below nominal. * Set stop on LBB blades to give ≈3 mm (or TBD, less than Cu-magnet gap) of LBB above nominal. |
| Line 40: | Line 52: |
| * --(Rearrange arc weights on PI to allow installation of magic wand.)-- * --(Install magic wand on PI.)-- * Check that we still have all LBB parts (there was an issue with borrowed lock nuts). * --(Rearrange magnets on SF damper magnet ring for full three Cu segments.)-- * --(Find Ni-plated rods for SF damper magnet ring and do fit check.)-- * --(Find PI-SF rod with 8 mm heads and matching receptacles and do fit check.)-- * Wipe LLB damper parts with ethanol. * --(Get Cu O-rings for feedthroughs.)-- * Figure out how to tighten PI yaw return spring. * --(Recalibrate remachined LBB springs and choose best three.)-- == Dates == * Repaired LBB half ring is returned: 9/11 (Mon, lunchtime) * BUMAX countersunk screws for LBB Cu * SDC screws for LBB half rings: 9/15 (Fri) * LBB Cu segments: 9/19-20 |
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| Line 63: | Line 59: |
| * Calibrate PI vertical LVDT. * Set yoke on PI vertical LVDT (if necessary). * Calibrate PI horizontal LVDTs. |
* Figure out how to make PI yaw adjustment reliable. |
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| * Calibrate all LVDTs (Enzo, Mark). --(BF)--, --(SF)--, PI-GAS, PI-H1, PI-H2, PI-H3 | * Calibrate all LVDTs (Enzo, Mark). --(BF)--, --(SF)--, --(PI-GAS)--, PI-H1, PI-H2, PI-H3 |
| Line 89: | Line 83: |
| * --(Create a proper DAC Monitor MEDM screen.)-- * --(Improve ADC Monitor MEDM screen.)-- |
VIS Type B BS Near Term To-Do List
Every Week
Facilities
- Vacuum and roll floor.
- Wipe ladders.
- Tidy tools, parts.
Get stuff from ../WishList
2017-09-25
Main Assembly Sequence
- Move in-air cabling and feedthroughs and reconnect in-vacuum cables (through Cu O-rings).
- Fix #1 geophone adapter cable.
- Fix broken pico adapter cable?
- Debug all electronics, starting with IRM OSEMs.
- Unlock IP; use jacks and FRs to center.
- Check IP yaw.
- Recheck centering of suspension in assembly frame.
- Measure IP period; adjust ballast mass.
- Calibrate IP LVDT sensing against IP LVDT actuation, IP FRs.
- LBB stuff (see below).
=== LBB Sequence
- Unclamp LBB ring sandwich; fully suspend Cu ring.
- Unscrew LBB from tank brackets.
- Hook LBB.
- Remove TBD amount of spacers from between LBB and tank brackets.
- Set LBB blade stops to nominal height.
- Extend foot screws on LBB to just barely support LBB.
- Adjust height of LBB magnet ring to set proper gap (4 mm??).
- Retract LBB foot screws.
- Add temporary ballast to LBB until LBB blades just barely sink below stops.
- Check distance from LBB to main beam height (or other suitable reference); adjust by screwing receptacles.
- Set foot screws to give ≈5 mm (or TBD) movement range of LBB below nominal.
- Set stop on LBB blades to give ≈3 mm (or TBD, less than Cu-magnet gap) of LBB above nominal.
In parallel, time permitting
Tasks Not To Forget
Major Tasks
- Update BS Install Procedure with screenshots from new on-assembly-frame 3D CAD.
- Finish assembly drawing for LBB and LBB damper ring and post on JGWDoc (Hirata-san).
- Get pico drive screens fixed (Miyo-kun)
- Figure out how to make PI yaw adjustment reliable.
Minor Tasks
Mechanical
- Get clean bag laundered.
- Put pointy-tipped screw in RM trolley for BS
- Return/replace borrowed parts:
- Lock washers for LBB dampers
- Temporary ballast mass (dog clamps) in BF.
- Swap in new F0-SF maraging rod (with 8-mm heads) and new receptacles to match.
Electrical
- Decide final in-vacuum and in-air cable routing (Enzo).
Calibrate all LVDTs (Enzo, Mark). BF, SF, PI-GAS, PI-H1, PI-H2, PI-H3
- Adjust yoke on PI to put top of secondary at TBD mm above top of baseplate (or to give ≈0 counts at nominal height).
Real-time and SUMCON models
- Create SUMCON models for full BS and major installation milestones.
Create controls design description (cf LIGO-T1100378).
- Make table of ADC/DAC assignments and check for consistency with D1503600 and k1visbs (Enzo, Mark)
- Understand/document/debug Kokeyama-san's DIO stuff.
- Measure LPCD and HPCD output filter response.
- Design and install software compensation filters for LPCD and HPCD output filters.
- Design and install GAS drift compensation filters.