• KAGRA
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• VIS
• TypeB
• ToDoOldBS

VIS Type B BS To-Do List - Archived Items

The BS and SR To-Do lists have been merged at ../ToDo, with archived items at ../ToDoOld.

2018-05-28

• Calibrate LEN OL

2018-03-12

• Prepare BS Chamber

  • Remove non-vacuum-compatible ballast from LBB.

  • Check for lost tools.

  • Wipe down all accessible areas inside tank with Vector Alpha wipes and ethanol.
• Help Type Bp Team

  • Add screws to cables at PR2 feedthroughs.

2017-12-18

• Re-zero OL.

2017-12-04

• Diagonalize OL.

2017-11-13

Main Assembly Sequence

• Realign OL.
• Cover OL with foil.

• Offload IP P&Y offsets to picos.

• Move stuff out of PR2 area.
• Tidy/label parts.

2017-10-16, 2017-10-24

Main Assembly Sequence

• Borrow portable hard drive.
• Remove sticker residue and permanent marker writing on PI.
• Fix broken and unreliable connections on IP LVDTs.
• Reconfigure the stepper motor cables for Miyo-kun.
• Add IP LVDT gains and offsets to IP_LVDTINF filter blocks.
• Install damping filters for IP LVDTs.
• Install and debug IP LVDT and geophone diagonalization matrices.
• Work with alignment team.
• Work with Mirapro on SR LBB and tank installation (Hirata-san, from Wed)
• Work with Miyo-kun to get user interface for stepper motors.
• Calibrate IP FR actuation against IP LVDT sensing.
• Lower LBB by 17.5 mm; suspend and rebalance after removing table KOACH filters.
• Reroute cable to eliminate need for fifth feedthrough.

Software

• Enter new IP matrices and do safe.snap.
• Send stepper driver info to Miyo-kun.
• Add support for comments to SUMCON.
• Derive matrices for IP FRs.

2017-10-10

Main Assembly Sequence

• Account for second bubble level (might be on BF).
• Borrow portable hard drive.
• Clean up sticker residue and magic marker writing.
• Remove LVDT modules; identify screws.
• Check that all in-air cables are labeled.
• If possible, reroute cable to eliminate need for fifth feedthrough.
• Debug all electronics, especially actuation.
• Calibrate all LVDTs. BF, SF, PI-GAS, PI-H1, PI-H2, PI-H3
• Install small KOACH filters on LBB.
• Remove First Contact.
• Cable optical lever (Simon, Enzo)
• Align optical lever (Simon)

Software

• Enter new IP matrices and do safe.snap.
• Send stepper driver numbering info to Miyo-kun.
• Add support for comments to SUMCON.

2017-10-02

Main Assembly Sequence

• Tidy up and cover things to prepare for SR2 crane slot work.
• Replace BS service port covers.
• Check for bubble level and other tools in tank.
• Remove stickers on IP and clean with ethanol (some were missed last time).
• Fix broken pico adapter cable?
• Debug all electronics, especially actuation.
• Check IP yaw.
• Recheck centering of suspension in assembly frame.
• Get pico drive screens fixed (Miyo-kun)

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.
• Unlock IP; use jacks and FRs to center.
• (Debug issue with tilted IRM!)

LBB Sequence

• Decide final in-vacuum and in-air cable routing.
• 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.

2017-09-19

(No work Monday 9/18)

Main Assembly Sequence

• Debug BF LVDT actuation.
• Check F0 yoke height (top of coil former should be 37.5 mm above bottom of recess in top of baseplate) 36mm.
• Test all PI items:
  • Yaw stepper (tested, not clearly working).
  • F0 LVDT sensing
  • F0 LVDT actuation
  • Calibrate F0 LVDT.
  • Horizontal LVDT sensing
  • Horizontal LVDT actuation
  • Geophones (issues with driver, cables, descramblers)
• Lock the F0 and SF keystones and measure the resonance frequency of the BF GAS 2 Measurements: f1=0.443 Hz, f2=0.454 Hz.
• Lock the SF and BF keystones and measure the resonance frequency of the F0 GAS 2 Measurements: f1=0.208 Hz, f2=0.210 Hz.
• Double check BS pitch with OL.
• Adjust SF damper ring to correct gap.
• Install lock nuts on F0 GAS FR at TBD positions.

• Lock BF and F0 keystones (but not SF keystone).

• Lock RM to BS, IRM to IM and IM to RM.
• Lock RM, IRM and BF (but not SF) to security structure.
• Lock IP.
• Remove F0 keystone top plate (including yaw stepper) and immobilize SF/... in yaw.
• Attach lifting fixture.
• Remove BF- and SF-level crossbars.
• Remove geophones for craning.
• Disconnect in-vacuum cables from feedthrough and coil neatly for craning.
• Attach lifting plates.

Tank Preparation Sequence

• Attach Cu segments to LBB damper ring.
• Pass halves of LBB magnet ring into tank, join, and make sandwich for craning.
• Crane tank lid off.
• Crane LBB damper rings to top of tank and suspend.
• Crane suspension out of assembly frame.
• Attach LBB upper rods to LBB blade tips and rotate suspension 45° clockwise.
• Crane suspension into tank and connect upper rods to LBB Cu ring.
• Fix poorly seated head.
• Unlock suspension and readjust.

In parallel, time permitting

• Fix issue with geophone distributor.

2017-09-11

Main Assembly Sequence

• Debug other actuation.
• Remove F0-SF rod and reinstall with hex cable clamp.
• Route cables up past hex cable clamps.
• Adjust SF trim mass for pitch/roll/vertical.
• Route all SF/... cables through to the flange and test.
• Cable all PI items through to the flange.
• Disconnect the SS from the AF.
• Recheck/adjust SF/... yaw.
• Roughly level the PI so as to make the SS vertical.
• Unlock the IP and adjust the level of the PI and the horizontal FRs to center the IP.
• Test all PI items:
  • Horizontal steppers
  • Geophones
• Lock the F0 and BF keystones and measure the resonance frequency of the SF GAS. 425 mHz

In parallel, time permitting

• Fix links to ADC_MONITOR screens.
• Check that all Take/Restore Safe.snap buttons work.
• Check that we still have all LBB parts (there was an issue with borrowed lock nuts).
• Wipe LLB damper parts with ethanol.
• Install LBB Cu damper ring in tank (less Cu for now).
• Apply magnets to LBB Magnet rings.
• Clean rust from screw holes in LBB magnet ring.

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

• Rearrange arc weights on PI to allow installation of magic wand.
• Install magic wand on PI.
• 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.
• Get Cu O-rings for feedthroughs.
• Recalibrate remachined LBB springs and choose best three.

2017-08-28

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.
• Remove Kapton tape from PI.

Electrical

• 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.

2017-08-21

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.

Electrical

• Remove cling wrap in BF and install vacuum-compatible heat shrink.
• 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).

Real-time and SUMCON models

• Create a proper DAC Monitor MEDM screen.
• Improve ADC Monitor MEDM screen.

2017-08-16

Facilities

• Move cardboard box with old BF to storage.
• Tidy up Hirata-san's stuff in genkan of cleanbooth.

Electronics

• Return spare two Type5-2.2 cables to Sato-san's store.
• Rip out remaining old in-air cabling.
• Reinstall LVDT chassis.

Main Assembly

• Remove LBB blade assemblies from PI.
• Remove LBB blades from holders.
• Remove LBB rings.
• Send rings for recleaning.

2017-08-07

Electronics

• Route new (longer) TM OSEM cables.
• Recable/test IM-PIT/ROL/YAW picos.
• Recable/test BF Stepper.

Main Assembly

• Weigh filter lifting rod plus whatever other items used by Hirata-san in BF load capacity measurement.
• Finish adjusting in/out of TM OSEMs.
• Hang RM.
• Remove endplate of IM, check pico centering.
• Weigh/trim IM/RM/TM
• Bring in BF.
• Install IRM top plate.
• Hook IM/RM/BS.

2017-07-31

Facilities

• Re-secure floor panels around tank.
• Wipe entire frame; blow dust out of grooves.
• Organize new OL for setting BS pitch (Fabian).

Design/Documentation/Planning

• Do version of 3D CAD with final-hang arrangement of suspension and LBB damper stuff (Hirata-san).

Electronics

Main Assembly

• Remove dummy BS from RM.
• Install coil-only OSEMs.
• Measure coil resistances of wide-mouth OSEMs, new coil-only OSEMS (for Michimura-san).
• Look up log book to find serial numbers of old coil+sensor RM OSEMs.
  • 2016-09-07: H1 = #22, H2 = #23, H3 = #25, H4 = #26
• Pack RM coil+sensor OSEMs, label them with original serial numbers, and return them to Akutsu-san.
• Reassemble top of AF.
• Check verticality of AF, height of crossbars, centering of optical table.
• Move NB-03 jacks at PI level of AF to top level.
• Set height, level of IM support screws.
• Install IM.

2017-07-24

Electronics

• Look for LVDT driver box Syyxx3134.
• Make sure SR3 boxes have notes on their JGW-S.... document pages.

Main Assembly

• Remove BF-SF cables (note which had gender benders and which had extensions).
• Remove SF.
• Remove SF SS ring and poles.
• Move (or remove) SF AF crossbars.
• Remove IRM.
• Remove old BF.
• Remove RM and dummy BS.
• Characterize blades (1,2,3,4,5,6,7).
• Rebuild BF.
• Check gluing result.
• Cleanup optic after failed secondary prism bonds.
• Cleanup jigs/prisms after failed secondary prism bonds.
• Reglue secondary prisms.

2017-07-17

Facilities

• Get blue underwear for Yoshioka-kun.

Design/Documentation/Planning

• LBB ballast mass.
  • Do improved mass budget.

Main Assembly

• Try to remove galled pole.
  • Consult with Takahashi-san.
  • Get alcohol in squirt bottle.
  • Try removing pole with alcohol as lubricant.
• Inspect, finish setting up filter service area.
• Search for wire.
• Glue flags/prisms.

2017-07-10

Facilities

BS Prism/Flag gluing

• Search for prisms (Mark/Enzo).
• Clean magnet jigs, prisms (Hirata).
• Assemble (with glue) magnet jigs. (Mark)
• Glue flags/prisms.

Design/Documentation/Planning

• Order longer threaded rods for arc weights on PI (Hirata-san).
• Final ballast mass design for BF and SF.
  • Do revised drawings (Hirata-san).
  • Decide final numbers.
  • Get quote.
  • Place order.
• Final ballast mass for IM.
  • Final design (Fabian).
  • Drawings (Hirata-san).
  • Get quotes (Hirata-san)
  • Place order (Hirata-san).
• Measure total LBB load capacity.

Electronics

• Document LVDT driver rebuild and other changes.

Main Assembly

• Search for wire (Mark/Enzo).
• Experiment with rearranging arc weights to accommodate magic wand.
• Remove arc weights; load onto LBB; measure total load capacity.
• Unload arc weights and store.
• Disconnect cables (Mark/Enzo).
• Connect tank lid to tank ring (Mark/Enzo).
• Dismantle LBB and rings.
  • Remove screw feet.
  • Replace blocks.
• Reinstall spacers and clamps on LBB damper rings.
• Unhook rods supporting LBB intermediate ring.
• Crane out suspension.
• Crane down rings.
• Remove rings.
• Send rings for recleaning.
• Reinstall AF crossbars and jacks.

2017-06-26

BS Prism/Flag gluing

• Organize transport company for Kashiwa->Kamioka

• Collect mirror, mirror box, tools etc from Kashiwa.
• Ship mirror to Kamioka via Akabou.
• Ship gluing tools to Kamioka via Yu-Pack.
• Get 5 mm prisms cut down to 3 mm (ATC, Hirata-san).
• Get magnet jigs remade (ATC).

Design/Documentation/Planning

• Do version of 3D CAD with test-hang arrangement of suspension and LBB damper stuff (Hirata-san).

Electronics

• Fix #0 LVDT actuator coil.

2017-06-26

BS Prism/Flag gluing

• Push Hirose-san to set exact date.

• Organize NAOJ vehicle for Mitaka->Kashiwa

• Collect all items required.
  • Mirror box.

  • Prisms. (not found!)

  • Stub flags.

  • Magnets: SmCo, 2 mm diameter, 3 mm long

  • Prism jigs
  • Flag jigs
• Glue magnets to flags, 2 N, 2 S.
• Organize clean suits.
  • Make a list of people's sizes
  • Get Mark/Enzo to bring from Kamioka.

Main Assembly

• Adjust pitch/yaw/vertical of dummy optic.
• Crane tank lid on.
• Start TFs.

Electronics

• Wash extra F-F gender benders.
• Fix broken picomotor cable.
• Sort out naming convention for PI LVDTs, geophones and horizontal steppers.

LSOL

• Assist Simon with hardware installation of LSOL.
• Assist Simon with modifications to realtime model for LSOL.

Real-time and SUMCON models

• Derive and install PI LVDT matrices.
• Check LSOL section of k1visbs model.

2017-06-19

Facilities

• Remove cling wrap from stuff.
• Plug stuff back in (charging station, KOACH filters, OL etc).
• Power up rack.

Main Assembly

• Remove crossbars below BF and SF.
• Set SF damper to 4 mm clearance.
• Find wrenches for vacuum tank jacks (41 mm and possibly 75 mm).
• Adjust jacks to nominal height.
• Do up all EQ stops etc (except SF).
• Remove geophones (temporarily, for craning).
• Crane suspension into tank.
• Hook LBB Cu ring.
• Hook LBB.
• Crane vacuum tank lid+ring back on.
• Remove vacuum tank lid (only) and store on pallet.
• Add ballast to LBB.
• Replace geophones.
• Unlock all but IP and check pendulum is centered in security structure. Adjust with jacks.
• Unlock IP and adjust to center with jacks.

Electronics

• Disconnect in-vacuum and in-air cabling from feedthroughs (label in-vacuum ones).
• Remove port covers where feedthroughs will go, move feedthroughs from assembly frame and install on vacuum tank ring.
• Reconnect in-vacuum cabling.
• Adjust in-air cabling to match 135° rotation of BS.
• Reconnect in-air cables. (all but 4)

2017-06-12

Main Assembly

• Check pitch/roll of SF and adjust trim as required.
• Prepare LBB.
  • Attach LBB outriggers and rod receptacles.
• Prepare LBB Cu ring.
  • Remove from tank, fix incompletely threaded holes, reinstall in tank.
  • Lay down spacers to protect magnets (in next step).
• Prepare LBB magnet ring.
  • Disassemble.
  • Pass pieces into tank.
  • Reassemble on top of Cu ring.
• Install LBB damper.
  • Bind LBB damper rings together with slings.
  • Remove vacuum tank lid and ring.
  • Crane rings up to install height, hook LBB magnet ring and support LBB Cu ring by TBD method.

Electronics

• Cable and test PI yaw stepper.
• Cable and test PI vertical stepper.
• Cable and test PI horizontal steppers.
• Cable and test PI horizontal LVDTs.
• Finalize OSEM cable lengths and update D1503600, E1503091 and Sato-san's spreadsheet.
• Recount cables in box and in test hang, and update Sato-san's spreadsheet.
• Cable and test PI vertical LVDT.
• Debug/fix PI vertical LVDTs #0 and #2.
• Debug/fix geophone #1.

2017-05-29

Facilities

Design/Purchasing

• Get more cable ties.

Main Assembly

• Reinstall blades in LBB blade units.
• Do load test on LBB blade units.

Electronics

• Route BF/... cabling up past SF to PI.
• Route SF cabling up to PI.
• Add Type 3 extensions to SF/... cables.
• Move vacuum flanges to positions on assembly frame more convenient for next stage (accessible from second floor, one on each corner of frame).
• Move in-air cabling to match flange positions.

2017-05-22

Facilities

Design/Purchasing

• Design, order modifications to LBB blade springs.
• Get more duckboards.

Main Assembly

• Find geophone adapter plates.
• Ultrasonically clean geophone adapter plates and screws.
• Install geophone adapter plates.
• Get more PEEK clamp pieces from Sato-san and install.
• Lift PI and hang LBB damper ring.
• Crane PI back in.
• Install rod, this time with hex cable clamp.
• Re-hook SF/... section.
• Trim SF/... section.
• Install geophones.

Electronics

• Debug and calibrate SF LVDT.
• Debug stepper motors.
• Make two more (in-air) geophone unscrambler cables per E1503600-v13 Sheet 8.

2017-05-15

Facilities

• Get more UHV foil.
• 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).

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.

Electronics

• Make PI vertical/yaw stepper in-air adapter cable per E1503600-v13 Sheet 7.

2017-05-09

Safety

• Install safety bars

Continue PI Prep

• Find, install and wire up PI yaw stepper and bracket.
• Test IP.
• Install LBB blades in blade units.
• Check LBB blade unit alignment (was off by 21 mm due to blades being too long).

Hanging SF/BF/IRM/IM/RM/BS

• Fix centering of SF/... section.

Electronics

• Count used, unused, broken and needed in-vacuum cables and send data to Sato-san.
• Check connections in new geophone adapters (they turned out to be new-style).
• Decide final length for BS OSEM cables.

2017-04-24

Continue PI Prep

• Install LLB blades.
• Install LLB blade units in PI.

Hanging BF/IRM/IM/RM/BS (mostly Mark, Fabian, Perry)

• Crane in PI.
• Connect up SF/... .
• Measure overweight if any.

Electronics (mostly Enzo, Mark)

• Update E1503600 with DIO card for HPCDs, etc, etc.
• Decide final length for BS OSEM cables (Enzo, Mark, Fabian)

Real-time and SUMCON models (mostly Perry, 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.

2017-04-17

SF/BF/...

• Trim BF to correct pitch/roll.
• Install temporary ballast mass in SF.
• Lift SF/BF/... and check SF pitch/roll balance and overall weight.

Continue PI Prep

• Finish reattaching repaired LVDT coil(s) and redoing connectors with correct gender.
• Install fishing rod.
• Enlarge ring of crane adapter.
• Find table, weights, etc for use with LBB blade bending jigs.
• Set up LBB blade tensioning jig.

Hanging BF/IRM/IM/RM/BS (mostly Mark, Fabian, Perry)

• Test SF fishing rod stepper.
• Debug TM-H4.

Electronics (mostly Enzo, Mark)

• Work with Miyo-kun to get pico drivers added to BS rack and screens
• Update E1503600 with DIO card for HPCDs, etc, etc.
• Decide final length for BS OSEM cables (Enzo, Mark, Fabian)
• Make table of ADC/DAC assignments and check for consistency with D1503600 and k1visbs (Enzo, Mark)

2017-04-03

PI Move

• General prep
  • Decide if air shower needs to be moved.
  • Triple-check dimensions around second-floor parking spot for PI; decide best place for pallet.
  • Check for obstacles along path around -X side of cleanbooth.
  • Find/clean Saito-sensei's PI lifting adapter and any needed fasteners.
  • Check both crane remote controls (clean and dirty) are charged.
• Prepare PI for moving.
  • Remove accelerometers and store safely.
  • Remove large weights. (How? With forklift at last minute? Where to?)
  • Remove arc weights (move some to second floor, wrap rest for storage).
  • Attach lifting plates.
  • Wrap with clingwrap, cover with spare cleanbag.
  • Remove old cabling from PI to rack.
• Prepare second floor for receiving PI.
  • Clean and clingwrap pallet.
  • Find metal plates and/or duckboards for on top of pallets.
  • Move BS cables on -Y side of tank off top of beam.
  • Find shims (about 75 mm high) to put on beam where cables were, to help support pallet.
• Clear path to remove PI with forklift.
  • Move any obstacles identified previously.
  • Shutdown BS/PR2 racks and move electrical cables.
  • Move any stored items on -Y side of portable cleanroom.
  • Move portable cleanroom towards -Y.
  • Move worktables from next to BS/PR2 racks.
• Move PI
  • Disconnect fan cables, curtain (Miyoki-san).
  • Unzip ceiling panel.
  • Crane pallet into cleanbooth.
  • Lay foil on pallet.
  • Forklift PI to -X,+Y corner of cleanbooth
  • Crane PI into clean booth.
• Cleanup
  • Zip up ceiling panel.
  • Reconnect fan cables, curtain (Miyoki-san).
  • Replace tables near BS/PR2 racks
  • Move portable cleanroom back to original spot.
  • Re-lay electrical cables.
  • Power up racks.

Electronics (mostly Enzo, Mark)

• Make more anti-feedthrough adapters.

Real-time and SUMCON models (mostly Perry, Mark)

• Reroute in-vacuum cables up to SF level; add in-vacuum extension cables if necessary.
• Get Perry (and Enzo) set up with SUMCON.
• Update SUMCON model of full BS.
• Do cut-down SUMCON model of just payload hanging from fixed BS.
• Compare measured TFs to cut-down model(s).