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[[#RealBSHang|Preparation for Real BS Hang]] |
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== 2017-08-21 == === Design/Documentation/Planning === * Update BS Install Procedure with screenshots from new on-assembly-frame 3D CAD. |
== 2017-09-04 == |
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=== Main Assembly === * --(Wrap new IM bottom ballast masses (Mozumi).)-- * --(Install new IM masses.)-- * --(Set up optical level.)-- * --(Adjust IM ballast mass to give desired roll/pitch/vertical.)-- * --(Level BF.)-- * --(Cable BF LVDT, test and calibrate.)-- * --(Adjust top of IRM to level.)-- * --(Install IRM side panels.)-- * --(Install IRM OSEMs.)-- * --(Cable IRM OSEMs)-- and test. * --(Adjust IRM and IRM OSEMs to get good alignment of IRM OSEMs and IM-IRM stops.)-- * --(Add extra ballast mass to BF.)-- * --(Add BF cap but don't anchor cables.)-- * --(Cable and test BF cap picos.)-- * --(Lift BF/IRM/IM/RM/BS and weigh.)-- * --(Adjust BF ballast if necessary.)-- * --(Crane in SF.)-- * Hook up BF/IRM/IM/RM/BS. * Route cables up to SF. * Adjust BF ballast if necessary. |
=== Main Assembly Sequence === * --(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. |
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=== Time permitting === * Lay more new in-air cabling. |
=== In parallel, time permitting === * --(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.)-- * Lay more new in-air cabling. * 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.)-- |
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== Real BS Hang Tasks == | == Tasks Not To Forget == |
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* Update BS Install Procedure with screenshots from new on-assembly-frame 3D CAD. | |
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* --(Final ballast mass production for BF and SF (Hirata-san). )-- * --(Design of receptacles for rods with 8 mm heads.)-- * --(Possible rebuild of BF)-- * --(Set up build/test stand for filters.)-- * --(Get filter test weights.)-- * --(Find spare BF blade(s).)-- * Reclean stuff: * PI (remove Kapton tape etc, etc). * LLB damper stuff, especially Cu segments. * Calibrate SF LVDT. |
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* --(Swap out temporary ballast mass in BF)--, SF. | |
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* --(Wide-mouth OSEMs from RM to Akutsu-san)-- * --(Adjust height of crossbars below BF.)-- * --(If possible, fix galled pole in BF level of EQ stop.)-- |
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* --(Check inside SF for lost ruler.)-- * Tighten PI yaw return spring. * Get Cu O-rings for feedthroughs. |
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* --(Remove cling wrap in BF and install vacuum-compatible heat shrink.)-- * --(Remove cling wrap on connections for PI vertical stepper and install vacuum-compatible heat shrink (needs wider diameter heat shrink or smaller pins).)-- * --(Rewire PI horizontal steppers with vacuum-compatible cable)--. * --(Adjust yoke on BF to put top of secondary at 3.5 mm above top of baseplate (or to give ≈0 counts at nominal height).)-- * Adjust yoke on SF to put top of secondary at 6 mm above top of baseplate (or to give ≈0 counts at nominal height). |
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
2017-09-04
Main Assembly Sequence
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.
In parallel, time permitting
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.
- Lay more new in-air cabling.
- 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.
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)
- Calibrate PI vertical LVDT.
- Set yoke on PI vertical LVDT (if necessary).
- Calibrate PI horizontal LVDTs.
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.
Create a proper DAC Monitor MEDM screen.
Improve ADC Monitor MEDM screen.