Differences between revisions 143 and 209 (spanning 66 versions)
Revision 143 as of 2017-09-20 12:18:04
Size: 4235
Editor: EnzoTapia
Comment:
Revision 209 as of 2018-11-21 19:00:39
Size: 4208
Editor: MarkBarton
Comment:
Deletions are marked like this. Additions are marked like this.
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== December 2018 vent ==
 * Look for cracks in F0 blades.
 * Install new yaw F0 stepper mechanism (if available).
 * Install new double-sided F0 fishing rod (have all parts except blades).
 * Add more mass to IP to get a lower frequency.
 * Service geophones (one has high noise, one has DC offset).
 * Re-calibrate F0 GAS LVDT.
 * Confirm the positions of the IP LVDTs and Actuators.
 * Tune LBB (adjust table height, damper height) - DON'T BOTHER (unless there's an excuse to open the lower half of the tank).
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== 2017-09-19 ==
(No work Monday 9/18)
== ASAP ==
 * --(Get picomotor drivers back on line.)--
 * --(Debug BS BIO connections, especially PI IP.)--
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 * --(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 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.
 * Necessary for phase-I★★★
  * --(Modify IP LVDT damping filters to include set point.)--
  * --(TFs.)--
  * '''''EXCHANGE YAW/VERT FRs at F0'''''
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 * Necessary for phase-II★★
  * Debug BS geophones.
  * Flip circuit boards in BS geophones to make them the same as SRx.
  * Calibrate IP LVDT actuation against IP LVDT sensing. (Klog 3553? http://klog.icrr.u-tokyo.ac.jp/osl/?r=3553)
  * Design PI Sensor blending filter.
  * Tune the LVDT sensitivity
  * Measure IP period; adjust ballast mass.
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 * 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).
 * At some point (remotely)★
  * Improve OL offloading.
  * Improve GAS offloading.
  * Spectral analysis of Oplev.
  * Design, install angular lock servo using OL. (Almost done for phase-I)
  * Adjust gains and debug damping for IM OSEMs and GAS LVDTs. (Almost done for phase-I)
  * Subtract DC level of Geophones.
  * Spectra analysis of PI sensors (PI LVDTs and Geophones).
  * Calibrate IP LVDT sensing against IP LVDT actuation, IP FRs.
  * Set all EQ stops to TBD clearance.
  * Modify the model for IP coil driver control
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=== 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.
=== Documentation and Operation Manual ===
 * Add useful info from Enzo's notebook to BSData.
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 * --(Move safety bars from BS AF area to SR2 area.)--
 * Update circuit diagram.
 * (Time permitting) Try adding mass to IP.
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 * Get pico drive screens fixed (Miyo-kun)  * Figure out how to make PI yaw adjustment reliable.
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 * Get clean bag laundered.
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 * 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.
 * --(Return/replace temporary ballast mass (dog clamps).)--
 * Characterize replacement F0.
 * --(Wipe/clean arc weights that were rained on.)--
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<<Anchor(elec)>>
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 * 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).
 * Update BS Circuit diagram, D1503600
  * --(Note removal of LED/PD on TM OSEMs.)--
  * Organize stepper reset system and watchdog BIO.
  * Include information on assignment of channels to feedthrough positions.
  * Reflect gender-changers and non-flipping feedthrough adapters.
  * Reflect actual cable lengths.
  * Include LVDT pin size (1 mm).
  * Include Stepper pin size (1.6 mm).
  * --(Undo renumbering of IP items.)--
  * --(Page 10: "DIO Card # 0" should be "DIO Card # 1")--
  * --(Include OutConfigBoards on OL page (Sheet 18).)--
  * --(Update HPCD section to reflect:)--
   * --(All three GAS channels are on HPCD #1 and DIO Card #2, CNB cables, Sheet 13.)--
   * --(Three IP channels are on HPCD #0 and DIO Card #2, CNA cables, Sheet 15.)--
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 * 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

December 2018 vent

  • Look for cracks in F0 blades.
  • Install new yaw F0 stepper mechanism (if available).
  • Install new double-sided F0 fishing rod (have all parts except blades).
  • Add more mass to IP to get a lower frequency.
  • Service geophones (one has high noise, one has DC offset).
  • Re-calibrate F0 GAS LVDT.
  • Confirm the positions of the IP LVDTs and Actuators.
  • Tune LBB (adjust table height, damper height) - DON'T BOTHER (unless there's an excuse to open the lower half of the tank).

ASAP

  • Get picomotor drivers back on line.

  • Debug BS BIO connections, especially PI IP.

Main Assembly Sequence

  • Necessary for phase-I★★★
    • Modify IP LVDT damping filters to include set point.

    • TFs.

    • EXCHANGE YAW/VERT FRs at F0

  • Necessary for phase-II★★
    • Debug BS geophones.
    • Flip circuit boards in BS geophones to make them the same as SRx.
    • Calibrate IP LVDT actuation against IP LVDT sensing. (Klog 3553? http://klog.icrr.u-tokyo.ac.jp/osl/?r=3553)

    • Design PI Sensor blending filter.
    • Tune the LVDT sensitivity
    • Measure IP period; adjust ballast mass.
  • At some point (remotely)★
    • Improve OL offloading.
    • Improve GAS offloading.
    • Spectral analysis of Oplev.
    • Design, install angular lock servo using OL. (Almost done for phase-I)
    • Adjust gains and debug damping for IM OSEMs and GAS LVDTs. (Almost done for phase-I)
    • Subtract DC level of Geophones.
    • Spectra analysis of PI sensors (PI LVDTs and Geophones).
    • Calibrate IP LVDT sensing against IP LVDT actuation, IP FRs.
    • Set all EQ stops to TBD clearance.
    • Modify the model for IP coil driver control

Documentation and Operation Manual

  • Add useful info from Enzo's notebook to BSData.

Tasks Not To Forget

Major Tasks

  • Move safety bars from BS AF area to SR2 area.

  • Update circuit diagram.
  • (Time permitting) Try adding mass to IP.
  • 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

Mechanical

  • Put pointy-tipped screw in RM trolley for BS
  • Return/replace temporary ballast mass (dog clamps).

  • Characterize replacement F0.
  • Wipe/clean arc weights that were rained on.

Electrical

  • Update BS Circuit diagram, D1503600
    • Note removal of LED/PD on TM OSEMs.

    • Organize stepper reset system and watchdog BIO.
    • Include information on assignment of channels to feedthrough positions.
    • Reflect gender-changers and non-flipping feedthrough adapters.
    • Reflect actual cable lengths.
    • Include LVDT pin size (1 mm).
    • Include Stepper pin size (1.6 mm).
    • Undo renumbering of IP items.

    • Page 10: "DIO Card # 0" should be "DIO Card # 1"

    • Include OutConfigBoards on OL page (Sheet 18).

    • Update HPCD section to reflect:

      • All three GAS channels are on HPCD #1 and DIO Card #2, CNB cables, Sheet 13.

      • Three IP channels are on HPCD #0 and DIO Card #2, CNA cables, Sheet 15.

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.

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