Differences between revisions 134 and 137 (spanning 3 versions)
Revision 134 as of 2017-09-14 16:23:42
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Editor: MarkBarton
Comment:
Revision 137 as of 2017-09-19 08:27:56
Size: 4046
Editor: MarkBarton
Comment:
Deletions are marked like this. Additions are marked like this.
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== 2017-09-11 ==

=== Main Assembly Sequence ===
 * Debug BF LVDT actuation.
 * --(Debug other actuation.)--
 * --(Remove F0-SF rod and reinstall with hex cable clamp.)--
 * --(Route cables up past hex cable clamps.)--
 * --(Adjust SF trim mass for pitch/roll/vertical.)--
 * --(Route all SF/... cables through to the flange and test.)--
 * --(Cable all PI items through to the flange.)--
 * --(Disconnect the SS from the AF.)--
 * --(Recheck/adjust SF/... yaw.)--
 * --(Roughly level the PI so as to make the SS vertical.)--
 * --(Unlock the IP and adjust the level of the PI and the horizontal FRs to center the IP.)--
 * Check F0 yoke height (top of coil former should be 37.5 mm above bottom of recess in top of baseplate).
 * Test all PI items:
  * Yaw stepper.
  * F0 LVDT sensing
  * F0 LVDT actuation
  * --(Horizontal steppers)--
  * Horizontal LVDT sensing
  * Horizontal LVDT actuation
  * --(Geophones)-- (except one cable broken: #1)
 * Lock the F0 and SF keystones and measure the resonance frequency of the BF GAS.
 * --(Lock the F0 and BF keystones and measure the resonance frequency of the SF GAS.)-- 425 mHz
 * Lock the SF and BF keystones and measure the resonance frequency of the F0 GAS.

=== In parallel, time permitting ===
 * --(Fix links to ADC_MONITOR screens.)--
 * --(Check that all Take/Restore Safe.snap buttons work.)--
 * --(Check that we still have all LBB parts (there was an issue with borrowed lock nuts).)--
 * --(Wipe LLB damper parts with ethanol.)--
 * Figure out how to tighten PI yaw return spring.
 * --(Install LBB Cu damper ring in tank (less Cu for now).)--
 * --(Apply magnets to LBB Magnet rings.)--
 * --(Clean rust from screw holes in LBB magnet ring.)--
 * Fix #1 geophone adapter cable.
 * Fix broken pico adapter cable.
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 * Attach Cu segments to LBB damper ring (needs Cu segments and BUMAX countersunk screws, expected 9/20).
 * Pass halves of LBB magnet ring into tank, join, and make sandwich for craning.
 * Crane tank lid off.
 * Crane LBB damper rings to top of tank and suspend.
=== Main Assembly Sequence ===
 * Debug BF LVDT actuation. ???
 * Check F0 yoke height (top of coil former should be 37.5 mm above bottom of recess in top of baseplate).
 * Test all PI items:
  * Yaw stepper (tested, not clearly working).
  * F0 LVDT sensing
  * F0 LVDT actuation
  * Horizontal LVDT sensing
  * Horizontal LVDT actuation
  * Geophones (issues with driver, cables, descramblers)
 * Lock the F0 and SF keystones and measure the resonance frequency of the BF GAS.
 * Lock the SF and BF keystones and measure the resonance frequency of the F0 GAS.
 * Double check BS pitch with OL.
 * Adjust SF damper ring to correct gap.
 * Install lock nuts on F0 GAS FR at TBD positions.
 * Lock BF and F0 keystones (but ''not'' SF keystone).
 * Lock RM to BS and IRM to IM.
 * Lock RM, IRM and BF (but not SF) to security structure.
 * Lock IP.
 * Remove F0 keystone top plate (including yaw stepper) and immobilize SF/... in yaw.
 * Attach lifting fixture.
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 * Lock BF and F0 keystones (but ''not'' SF keystone).
 * Remove F0 keystone top plate; attach lifting fixture.
=== Tank Preparation Sequence ===
 * Attach Cu segments to LBB damper ring.
 * Pass halves of LBB magnet ring into tank, join, and make sandwich for craning.
 * Crane tank lid off.
 * Crane LBB damper rings to top of tank and suspend.
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 * Add ballast  * Unlock suspension and readjust.
 * Move in-air cabling and feedthroughs and reconnect in-vacuum cables (through Cu O-rings).
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=== Main Assembly Sequence ===

== Dates ==
 * BUMAX countersunk screws for LBB Cu (by 9/20)
 * SDC screws for LBB half rings: 9/15 (Fri) (have Ag-coated as backup)
 * LBB Cu segments: 9/19-20
=== In parallel, time permitting ===
 * Fix issue with geophone distributor.
 * Fix #1 geophone adapter cable (and replace borrowed one).
 * Fix broken pico adapter cable.
 * Figure out how to tighten PI yaw return spring or otherwise make yaw adjustment reliable.

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

2017-09-19

(No work Monday 9/18)

Main Assembly Sequence

  • Debug BF LVDT actuation. ???
  • Check F0 yoke height (top of coil former should be 37.5 mm above bottom of recess in top of baseplate).
  • Test all PI items:
    • Yaw stepper (tested, not clearly working).
    • F0 LVDT sensing
    • F0 LVDT actuation
    • Horizontal LVDT sensing
    • Horizontal LVDT actuation
    • Geophones (issues with driver, cables, descramblers)
  • Lock the F0 and SF keystones and measure the resonance frequency of the BF GAS.
  • Lock the SF and BF keystones and measure the resonance frequency of the F0 GAS.
  • Double check BS pitch with OL.
  • Adjust SF damper ring to correct gap.
  • Install lock nuts on F0 GAS FR at TBD positions.
  • Lock BF and F0 keystones (but not SF keystone).

  • Lock RM to BS and IRM to IM.
  • Lock RM, IRM and BF (but not SF) to security structure.
  • Lock IP.
  • Remove F0 keystone top plate (including yaw stepper) and immobilize SF/... in yaw.
  • Attach lifting fixture.
  • Remove BF- and SF-level crossbars.
  • Remove geophones for craning.
  • Disconnect in-vacuum cables from feedthrough and coil neatly for craning.
  • Attach lifting plates.

Tank Preparation Sequence

  • Attach Cu segments to LBB damper ring.
  • Pass halves of LBB magnet ring into tank, join, and make sandwich for craning.
  • Crane tank lid off.
  • Crane LBB damper rings to top of tank and suspend.
  • Crane suspension out of assembly frame.
  • Attach LBB upper rods to LBB blade tips and rotate suspension 45° clockwise.
  • Crane suspension into tank and connect upper rods to LBB Cu ring.
  • Unclamp LBB ring "sandwich" so LBB Cu ring is suspended on upper rods.
  • Install LBB lower rods and hook LBB.
  • Measure required ballast for LBB.
  • Unlock suspension and readjust.
  • Move in-air cabling and feedthroughs and reconnect in-vacuum cables (through Cu O-rings).

In parallel, time permitting

  • Fix issue with geophone distributor.
  • Fix #1 geophone adapter cable (and replace borrowed one).
  • Fix broken pico adapter cable.
  • Figure out how to tighten PI yaw return spring or otherwise make yaw adjustment reliable.

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)

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)