VIS Type B Near Term To-Do List

Archived To-Do Items

Preparation for Real BS Hang

Preparation for SR Installation

Every Week

Facilities

• Vacuum and roll floor.
• Wipe ladders.
• Tidy tools, parts.

Coming Week (2017-06-19)

Facilities

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

Main Assembly

• Unlock BF keystone and try running BF fishing rod to fix sag problem (Enzo, Mark).
• 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 black on.
• Remove vacuum tank lid (only).
• Add ballast to LBB.

Electronics

• Disconnect in-vacuum and in-air cabling from feedthroughs.
• Remove port covers where feedthroughs will go, move feedthroughs from assembly frame and install on vacuum tank ring.
• Adjust in-air cabling to match 135° rotation of BS.
• Reconnect in-air cables.
• Calibrate PI vertical LVDT.
• Set yoke on PI vertical LVDT (if necessary).
• Calibrate PI horizontal LVDTs.

Real-time and SUMCON models

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

Real BS Hang Tasks

Major Tasks

• Final ballast mass design/production for BF and SF (Fabian, Hirata-san).
• Get final OSEM cables (six of 1.7 m, two of 2.2 m, two of 2.4 m; Sato-san).
• Possible rebuild of BF and/or SF
  • Set up filter build/test stand.
  • Get filter test weights.
  • Find spare BF blade(s).
• Prepare real BS:
  • Coordinate with Hirose-san.
  • Book transport of mirror (Kashiwa to KAGRA)
  • Gather mirror box, gluing supplies, prisms, magnets, new flags, new flag jigs.
  • Solve problem of lack of scribe line on one side of BS (Mark, Hirata-san).
  • Organize cleanroom gear for Kashiwa trip(s).
  • Put magnets in flags.
  • Glue flags/prisms at Kashiwa.
• Reclean stuff:
  • PI (remove Kapton tape etc, etc).
  • LLB damper stuff, especially Cu segments.

Minor Tasks

Mechanical

• Swap out temporary ballast mass in BF, SF.
• Return/replace borrowed parts:
  • Lock washers for LBB dampers
  • Temporary ballast mass (dog clamps) in BF.
  • 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.
• Swap in new F0-SF maraging rod (with 8-mm heads) and new receptacles to match.
• Check inside SF for lost ruler.
• Tighten PI yaw return spring.
• Get Cu O-rings for feedthroughs.

Electrical

• Get pico drive screens fixed (Miyo-kun)
• Decide final in-vacuum and in-air cable routing (Enzo).
• Calibrate all LVDTs (Enzo, Mark).
• 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 6 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.

SR Prep Tasks

Design/Purchasing

• Do rough mass budget for SR2/SR3/SRM.
• Design SR assembly frame.
• Get another D-Sub breakout (Hirata).
• Design final SF ballast masses (Fabian).
• Finish/post assembly drawing for LBB and LBB damper ring (Hirata).
• Try rearranging arc weights to make room for magic wand (3D CAD or actual weights; Fabian or Hirata).
• If needed based on previous, order longer threaded rods for arc weights on PI (Hirata).