Differences between revisions 151 and 152
Revision 151 as of 2017-10-01 21:14:28
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Editor: MarkBarton
Revision 152 as of 2017-10-01 21:21:03
Size: 2799
Editor: MarkBarton
Deletions are marked like this. Additions are marked like this.
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 * Calibrate all LVDTs (Enzo, Mark). --(BF)--, --(SF)--, --(PI-GAS)--, PI-H1, PI-H2, PI-H3
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 * Remove old OL stuff; add link to new OL stuff.
 * Remove unused screens.
 * Sort out SVN.
Line 68: Line 72:
 * 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).

VIS Type B BS Near Term To-Do List

Archived BS To-Do Items

SR To-Do Items

Every Week

Coming Weeks

Every Week


  • Vacuum and roll floor.
  • Wipe ladders.
  • Tidy tools, parts.
  • Get stuff from ../WishList


SR2 stuff

  • Replace BS service port covers, or reinforce foil with tape.
  • Cling-wrap or move:
    • White plastic table
    • Writing table
    • Tall metal table

Main Assembly Sequence

  • Check for bubble level and other tools in tank.
  • Remove stickers on IP and clean with ethanol (some were missed last time).
  • Wipe rusty screws on IP LVDTs and surrounding area with ethanol-soaked wipe.
  • Check that all in-air cables are labeled.
  • Fix broken pico adapter cable?
  • If possible, reroute cable to eliminate need for with feedthrough.
  • Debug all electronics, especially actuation.
  • Check IP yaw.
  • Recheck centering of suspension in assembly frame.
  • Measure IP period; adjust ballast mass.
  • Calibrate all LVDTs (Enzo, Mark). BF, SF, PI-GAS, PI-H1, PI-H2, PI-H3

  • Calibrate IP LVDT sensing against IP LVDT actuation, IP FRs.
  • Get ready for full TFs.


  • Enter new IP matrices and do safe.snap.
  • Get pico drive screens fixed (Miyo-kun)
  • Update real-time model to number channels from #0.
  • Remove old OL stuff; add link to new OL stuff.
  • Remove unused screens.
  • Sort out SVN.

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).
  • Figure out how to make PI yaw adjustment reliable.

Minor Tasks


  • 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.


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.

KAGRA/Subgroups/VIS/TypeB/ToDoBS (last edited 2019-01-04 15:21:23 by MarkBarton)