Differences between revisions 149 and 210 (spanning 61 versions)

VIS Type B BS Near Term To-Do List

This list has been merged into the common Type B list: ../ToDo.

Archived BS To-Do Items

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

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-[[../ToDoSR|SR To-Do Items]]

[[#EveryWeek |Every Week]]

[[#ComingWeeks |Coming Weeks]]

<<Anchor(EveryWeek)>>

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

<<Anchor(ComingWeeks)>>

== 2017-09-25 ==

=== 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.
 * 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 ===

<<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]]).
 * 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.