Differences between revisions 149 and 150
Revision 149 as of 2017-09-25 08:14:23
Size: 3240
Editor: MarkBarton
Comment:
Revision 150 as of 2017-09-29 08:02:05
Size: 3346
Editor: MarkBarton
Comment:
Deletions are marked like this. Additions are marked like this.
Line 25: Line 25:
 * Move in-air cabling and feedthroughs and reconnect in-vacuum cables (through Cu O-rings).
 * Fix #1 geophone adapter cable.
 * --(Move in-air cabling and feedthroughs and reconnect in-vacuum cables (through Cu O-rings).)--
 * --(Fix #1 geophone adapter cable.)--
Line 28: Line 28:
 * Debug all electronics, starting with IRM OSEMs.
 * Unlock IP; use jacks and FRs to center.
 * Debug all electronics, starting with IRM OSEMs. (half done)
 * --(Unlock IP; use jacks and FRs to center.)--
Line 37: Line 37:
=== LBB Sequence
 *
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.
=== LBB Sequence ===
 * --(
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.)--

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

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.

  • Fix broken pico adapter cable?
  • Debug all electronics, starting with IRM OSEMs. (half done)
  • Unlock IP; use jacks and FRs to center.

  • Check IP yaw.
  • Recheck centering of suspension in assembly frame.
  • Measure IP period; adjust ballast mass.
  • Calibrate IP LVDT sensing against IP LVDT actuation, IP FRs.
  • LBB stuff (see below).

LBB Sequence

  • 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.

In parallel, time permitting

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).
  • Get pico drive screens fixed (Miyo-kun)
  • Figure out how to make PI yaw adjustment reliable.

Minor Tasks

Mechanical

  • 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.

Electrical

  • 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).

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)