VIS Type B BS Near Term To-Do List

Archived BS To-Do Items

SR To-Do Items

Every Week

Coming Weeks

Every Week

Facilities

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

• Get stuff from ../WishList

December 2018 vent

• Look for cracks in F0 blades.
• Install new yaw F0 stepper mechanism (if available).
• Install new double-sided F0 fishing rod (have all parts except blades).
• Add more mass to IP to get a lower frequency.
• Service geophones (one has high noise, one has DC offset).
• Re-calibrate F0 GAS LVDT.
• Confirm the position of the IP-LVDTs and Actuators.
• Tune LBB (adjust table height, damper height).

ASAP

• Get picomotor drivers back on line.

• Debug BS BIO connections, especially PI IP.

Main Assembly Sequence

• Necessary for phase-I★★★

  • Modify IP LVDT damping filters to include set point.

  • TFs.

  • EXCHANGE YAW/VERT FRs at F0

• Necessary for phase-II★★
  • Debug BS geophones.
  • Flip circuit boards in BS geophones to make them the same as SRx.

  • Calibrate IP LVDT actuation against IP LVDT sensing. (Klog 3553? http://klog.icrr.u-tokyo.ac.jp/osl/?r=3553)

  • Design PI Sensor blending filter.
  • Tune the LVDT sensitivity
  • Measure IP period; adjust ballast mass.
• At some point (remotely)★
  • Improve OL offloading.
  • Improve GAS offloading.
  • Spectral analysis of Oplev.
  • Design, install angular lock servo using OL. (Almost done for phase-I)
  • Adjust gains and debug damping for IM OSEMs and GAS LVDTs. (Almost done for phase-I)
  • Subtract DC level of Geophones.
  • Spectra analysis of PI sensors (PI LVDTs and Geophones).
  • Calibrate IP LVDT sensing against IP LVDT actuation, IP FRs.
  • Set all EQ stops to TBD clearance.
  • Modify the model for IP coil driver control

Documentation and Operation Manual

• Add useful info from Enzo's notebook to BSData.

Tasks Not To Forget

Major Tasks

• Move safety bars from BS AF area to SR2 area.

• Update circuit diagram.
• (Time permitting) Try adding mass to IP.
• 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).
• Figure out how to make PI yaw adjustment reliable.

Minor Tasks

Mechanical

• Put pointy-tipped screw in RM trolley for BS

• Return/replace temporary ballast mass (dog clamps).

• Characterize replacement F0.

• Wipe/clean arc weights that were rained on.

Electrical

• Update BS Circuit diagram, D1503600

  • Note removal of LED/PD on TM OSEMs.

  • Organize stepper reset system and watchdog BIO.
  • Include information on assignment of channels to feedthrough positions.
  • Reflect gender-changers and non-flipping feedthrough adapters.
  • Reflect actual cable lengths.
  • Include LVDT pin size (1 mm).
  • Include Stepper pin size (1.6 mm).

  • Undo renumbering of IP items.

  • Page 10: "DIO Card # 0" should be "DIO Card # 1"

  • Include OutConfigBoards on OL page (Sheet 18).

  • Update HPCD section to reflect:

    • All three GAS channels are on HPCD #1 and DIO Card #2, CNB cables, Sheet 13.

    • Three IP channels are on HPCD #0 and DIO Card #2, CNA cables, Sheet 15.

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.