Differences between revisions 1 and 148 (spanning 147 versions)
Revision 1 as of 2017-03-12 19:19:05
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Editor: MarkBarton
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Revision 148 as of 2017-09-20 20:51:55
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Editor: MarkBarton
Comment:
Deletions are marked like this. Additions are marked like this.
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= VIS Type B Near Term To-Do List = = VIS Type B BS Near Term To-Do List =
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To-Do List 2017-03-13 [[../ToDoOldBS|Archived BS To-Do Items]]
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== Facilities ==
 * Vacuum and roll floor (All)
 * Wipe ladders (All)
 * Tidy tools, parts (All)
 * Find missing light lent to Kokeyama-san (Mark)
 * Mark/photograph/count peeling patches on the floor.
 * Mark/photograph/count pillars with bare concrete bases.
[[../ToDoSR|SR To-Do Items]]
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== Electronics == [[#EveryWeek |Every Week]]
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 * Wire up BF roll/pitch picos (Enzo)
 * Work with Miyo-kun to get pico drivers added to BS rack and screens (Enzo, Mark)
 * Grab remaining cables etc per E1605111 and update document (Enzo)
 * Update E1503600 with DIO card for HPCDs, etc, etc. (Enzo)
 * Decide final length for BS OSEM cables (Enzo, Mark, Fabian)
 * Send list of required in-vacuum cables to Takahashi-san (Enzo, Mark)
 * Debug 900 Hz noise on BF LVDT output (Enzo, Mark)
 * Debug excess noise on TM-H3 OSEM (Enzo, Mark)
[[#ComingWeeks |Coming Weeks]]

<<Anchor(EveryWeek)>>

== Every Week ==
=== Facilities ===
 * Vacuum and roll floor.
 * Wipe ladders.
 * Tidy tools, parts.
 * Get stuff from [[../WishList]]

<<Anchor(ComingWeeks)>>

== 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))-- 36mm.
 * Test all PI items:
  * Yaw stepper (tested, not clearly working).
  * --(F0 LVDT sensing)--
  * --(F0 LVDT actuation)--
  * --(Calibrate F0 LVDT.)--
  * 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)-- 2 Measurements: f1=0.443 Hz, f2=0.454 Hz.
 * --(Lock the SF and BF keystones and measure the resonance frequency of the F0 GAS)-- 2 Measurements: f1=0.208 Hz, f2=0.210 Hz.
 * --(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, IRM to IM and IM to RM.)--
 * --(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.)--
 * Fix poorly seated head.
 * 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.

<<Anchor(RealBSHang)>>
== 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 [[https://dcc.ligo.org/LIGO-T1100378/public|LIGO-T1100378]]).
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 * Make spreadsheet on Google Docs or the like with in-vacuum cable inventory (Hirata)

== PI Prep ==
 * Inspect PI, compare to CAD and 2D drawings (Hirata, Mark)
 * Identify missing PI parts (Hirata, Mark)
 * Find and reattach repaired LVDT coil(s) (???)

== Hanging BF/IRM/IM/RM/BS ==
 * Correct orientation of SF cap (Mark, Fabian, Perry)
 * Correct orientation of SF (Mark, Fabian, Perry)
 * Find/attach cable clamps for SF (Fabian)

== Real-time and SUMCON models ==
 * Update SUMCON model of full BS (Perry?, Okitomi?, Mark?)
 * Do cut-down SUMCON model of just payload hanging from fixed BS (Perry?, Okitomi?, Mark?)
 * Compare measured TFs to cut-down model
 * Create a proper DAC Monitor MEDM screen
 * Improve ADC Monitor MEDM screen
 * 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.

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) 36mm.

  • Test all PI items:
    • Yaw stepper (tested, not clearly working).
    • F0 LVDT sensing

    • F0 LVDT actuation

    • Calibrate F0 LVDT.

    • 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 2 Measurements: f1=0.443 Hz, f2=0.454 Hz.

  • Lock the SF and BF keystones and measure the resonance frequency of the F0 GAS 2 Measurements: f1=0.208 Hz, f2=0.210 Hz.

  • 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, IRM to IM and IM to RM.

  • 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.

  • Fix poorly seated head.
  • 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.

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)