VIS Type B To-Do List

Archived items are at ../ToDoOld.

Every Week

Coming Weeks

Every Week

Facilities

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

• Get stuff from ../WishList

2019-01-07,14,21

BS (top priority)

• Check that the suspension is floating.
• Re-center OL and log value to capture yaw position.
• Look for cracks in F0 blades.

• Install new double-sided F0 fishing rod (need to get blades) and (if necessary) auxiliary CuBe spring.

• Check that current defective yaw adjuster is at least locating the suspension in yaw.
• Remove and service or swap out geophones (one has high noise, one has DC offset, all have flipped pinouts). Could use new geophones originally intended for SRM to save time.
• Replace geophones and add more arc weights to IP to get a lower frequency.
• Re-calibrate F0 GAS LVDT.
• Adjust amount of mass on F0 keystone to get correct height, and secure in place.
• Confirm the positions of the IP LVDTs and Actuators, and update T1707205 if necessary.
• Install camera viewport???

SRM

• Test new yaw mechanism.
• Adjust F0 keystone mass to give desired height and secure weights in place.
• Measure height of RM/TM relative to SS and height of SS relative to tank or Telada-san's reference. Raise suspension on jacks if necessary.
• Borrow LED from SR2 and check/adjust optic pitch; return LED to SR2.
• Install Enomoto-kun's beam target plate (if available).
• Seal geophones.
• Install geophones and arc weights.
• Center and tune IP.
• Install OL viewport (already available).
• Install camera viewport if available. (At a minimum, remove flange cover temporarily and check that there is a good view of the HR surface.)
• Hook LBB and add just enough ballast to have it bouncing.
• Add additional ballast to LBB to set desired height (only if someone will be putting stuff on it).
• Set up OL (needs various parts).

SR3

• Install/test new yaw mechanism.
• Adjust height.
• Realign OL.
• Install camera viewport (already available).
• Measure height of RM/TM relative to SS and height of SS relative to tank or Telada-san's reference. Raise suspension on jacks if necessary.
• Add additional ballast to LBB to set desired height (only if someone will be putting stuff on it).

SR2

• Adjust height.
• Remove tape, writing etc on PI and PI items.
• Add new feedthrough to lower part of tank (with Izumi-san-tachi)?
• Install cable for MIF pico on LBB (with Izumi-san-tachi)?
• Add ballast mass to LBB.
• Measure height of RM/TM relative to SS and height of SS relative to tank or Telada-san's reference. Raise suspension on jacks if necessary.

Tasks To Be Scheduled

BS

• Tune BS LBB (adjust table height, damper height) - DON'T BOTHER (unless there's an excuse to open the lower half of the tank).
• Replace BS F0 thrust bearing and yaw adjuster - BIG JOB, DON'T BOTHER (unless lack of yaw adjustment becomes a major problem).

SR2

SR3

SRM

• Find two geophone cables used by Okutomi-san. (I looked in the second floor EXV room but didn't find them - Mark.)
• Find one geophone cable ordered for SRM but missing.
• Rearrange miswired geophone cable.
• Rebuild defective geophone cable.

Tunnel

• Get at least one BIO Converter chassis fully connected (CONTEC BIO card, WD and stepper motor chassis) for implementation and test of stepper motor reset function.
• Check SR2, SR3 TM coil gains for magnet polarity compensation.
• Replace chipped magnets (12x12x12 mm) in SR3 IP, H1 and H2.

Mitaka or remotely

• Write generic Type B Guardian; make BS and SR3 inherit from it; make analog WD optional for now (all suspensions will get them eventually).
• (Continue to) soak the sapphire prisms off the dummy BS for reuse on the SRM metal mass.
• Install damping filters for SR2.
• Review DAC channel requests.
• Split SRx real-time models?

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.