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= VIS Type B Near Term To-Do List = | = VIS Type B BS Near Term To-Do List = |
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../ToDoOld | [[../ToDoOldBS|Archived BS To-Do Items]] [[../ToDoSR|SR To-Do Items]] [[#EveryWeek |Every Week]] [[#ComingWeeks |Coming Weeks]] <<Anchor(EveryWeek)>> |
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* Get stuff from [[../WishList]] | |
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== 2017-05-15 == | <<Anchor(ComingWeeks)>> |
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== Facilities == * --(Clear spaces for PR2 bellows work and SR2 ladder installation on 5/15.)-- * --(Fix safety bar on -X side of assembly frame (move to other side of pillars and attach more securely).)-- |
== 2017-09-25 == |
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== Design/Purchasing == * Order longer threaded rods for arc weights on PI. * Design, order modifications to LBB blade springs. * Get more UHV foil. |
=== 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. (half done) * --(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). * |
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=== Main Assembly === * --(Secure arc weights with M8 nuts.)-- * --(Remove PI.)-- * --(Unjam PI-SF rod.)-- * --(Remove SF cap.)-- * --(Remove blades from LBB blade units)-- and send off for rework. * Install remaining cable clamps on PI. * --(Remove one Cu damper segment from SF cap and reconfigure remaining two to be symmetrical.)-- * Decide pattern of SF damper ring magnets (72 pieces in 2/3 of the original ring). * Install magnets on SF damper ring. * Lift PI and hang LBB damper ring. * Crane PI back in. * Install rod, this time with hex cable clamp. * Re-hook SF/... section. * Install geophones. |
=== 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.)-- |
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=== Electronics === * Debug and calibrate SF LVDT. * Put connector on PI vertical LVDT wires per E1503600-v13 Sheet 5. * Make PI vertical/yaw stepper in-air adapter cable per E1503600-v13 Sheet 7. * Make (in-air) geophone unscrambler cables per E1503600-v13 Sheet 8. * Complete cabling of PI stuff (steppers, LVDTs, geophones) through to rack and test. * --(Review cable spreadsheet;)-- send to Sato-san. |
=== In parallel, time permitting === <<Anchor(RealBSHang)>> == 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 [[https://dcc.ligo.org/LIGO-T1100378/public|LIGO-T1100378]]). |
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== Real-time and SUMCON models == |
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* 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. (half done)
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.