Differences between revisions 158 and 159
Revision 158 as of 2017-06-16 13:36:45
Size: 2949
Editor: MarkBarton
Comment:
Revision 159 as of 2017-06-23 20:28:14
Size: 2225
Editor: MarkBarton
Comment:
Deletions are marked like this. Additions are marked like this.
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 * Hirata-san and Sekine-san moved the tank lid and service port ring to the pallet with the crane and covered the open tank with the spare clean bag.
 * Hirata-san and Mark got the LBB damper rings assembled and installed. A joint part for the Cu ring needed to have holes enlarged because the hole pattern did not quite match that on the half-ring. The magnet ring is hanging in the chamber and the Cu ring is attached below it with clamps, ready to receive the rods that will hang down from the PI.
 * Hirata-san recounted all the unused cables.
 * Hirata-san installed the outrigger parts on the LBB, which will receive the rods coming down from the damper ring.
 * Enzo and Mark tested all the stepper motors.
 * Enzo and Mark debugged the PI horizontal LVDTs. One LVDT had a flaky connection and one card in the LVDT driver had three dead channels. Enzo created a fully working driver using parts from another driver that also had a faulty card.
 * Fabian adjusted the ballast mass on the SF to get good pitch/roll/vertical adjustment and attached it with screws.
 * Fabian set up the optical lever again (the PR2 team had repossessed the breadboard we had been using but Akutsu-san supplied another one).
 * Enzo and Mark tested the pico motors. The software is very unreliable, but we we able to confirm that the IM pitch pico works.
 * The whole team wrapped items and shut down equipment ahead of the power outage.
==== Plan for coming weeks ====
For more detail, see [[KAGRA/Subgroups/VIS/TypeB/ToDo]].
 * We disconnected the in-vacuum and in-air cabling from the feedthroughs.
 * We removed crossbars below BF and SF.
 * We set the SF damper to 4 mm clearance.
 * We adjusted the jacks to nominal height.
 * We removed the geophones and PI yaw stepper for craning.
 * We craned the suspension into the tank, and hooked the LBB Cu ring.
 * We replaced the geophones etc.
 * We unlocked all but the IP and adjusted the jacks until the pendulum was centered in the security structure.
 * We unlocked the IP and adjusted to to center with the jacks and fishing rods.
 * We craned the vacuum tank lid+ring back on, and then removed just the lid (only).
 * We unclamped the LBB damper rings and removed the spacers.
 * We removed the blocks and shims supporting the LBB, inserted the long screw feet and hooked the LBB to the Cu damper ring.
 * We added 2*31.5 kg of ballast to the LBB, which got the blades to the point where firm pressure would depress the tips.
 * We reconnected the in-vacuum cabling. In ≈15 places we opted to omit the Type 1 cable and use a F-F gender bender.
 * We reconnected all but four of the in-air cables.
Line 21: Line 24:
Week of 6/12:
 * Cabling:
  * Debug/fix PI vertical LVDTs #0 and #2.
  * Calibrate PI vertical LVDT.
  * Debug/fix geophone #1.
  * Set yoke on PI vertical LVDT (if necessary).
  * Cable and test PI yaw stepper.
  * Cable and test PI vertical stepper.
  * Cable and test PI horizontal steppers.
  * Cable and test PI horizontal LVDTs.
  * Calibrate PI horizontal LVDTs.
 * Prepare LBB.
  * Attach LBB outriggers and rod receptacles.
 * Prepare LBB Cu ring.
  * Remove from tank, fix incompletely threaded holes, reinstall in tank.
  * Lay down spacers to protect magnets (in next step).
 * Prepare LBB magnet ring.
  * Disassemble.
  * Pass pieces into tank.
  * Reassemble on top of Cu ring.
 * Install LBB damper.
  * Bind LBB damper rings together with slings.
  * Remove vacuum tank lid and ring.
  * Crane rings up to install height, hook LBB magnet ring and support LBB Cu ring by TBD method.
 * Crane suspension into tank.
 * Hook LBB Cu ring.
 * Hook LBB.
 * Crane vacuum tank lid+ring black on.
 * Remove vacuum tank lid (only).
 * Remove port covers where feedthroughs will go, move feedthroughs from assembly frame and install on vacuum tank ring.
 * Reconnect in-air cables.
==== Plan for week of 6/26 ====
Mark and Enzo at Kamioka:
 * Double-check where gender-benders were used.
 * Finish connecting in-air cabling.
 * Debug all cabling.
 * Work with Simon to set up LSOL.
Fabian at Mitaka:
 * Design final ballast masses for IM, BF and SF assuming no BF rebuild (needs to be adaptable).
 * Check all items for BS flag/prism gluing are available (prisms, flags, jigs, mirror box, glue, scale, mixing tools etc).
Hirata-san at Mitaka:
 * Do new 3D CAD:
  * BS Test Hang build, with top of tank, full suspension, and LBB damper all reversed.
  * Final BS build, as above, but with everything BF down rotated back to original.
   * In-tank version.
   * On-assembly-frame version. (Adjust jack positions if possible, or leave for Mark to do.)
  * SR2 on BS assembly frame. (Adjust jack positions if possible, or leave for Mark to do.)

Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

Type B (Mark)

Past week report

At Kamioka (Mark, Fabian, Enzo, Hirata-san):

  • We disconnected the in-vacuum and in-air cabling from the feedthroughs.
  • We removed crossbars below BF and SF.
  • We set the SF damper to 4 mm clearance.
  • We adjusted the jacks to nominal height.
  • We removed the geophones and PI yaw stepper for craning.
  • We craned the suspension into the tank, and hooked the LBB Cu ring.
  • We replaced the geophones etc.
  • We unlocked all but the IP and adjusted the jacks until the pendulum was centered in the security structure.
  • We unlocked the IP and adjusted to to center with the jacks and fishing rods.
  • We craned the vacuum tank lid+ring back on, and then removed just the lid (only).
  • We unclamped the LBB damper rings and removed the spacers.
  • We removed the blocks and shims supporting the LBB, inserted the long screw feet and hooked the LBB to the Cu damper ring.
  • We added 2*31.5 kg of ballast to the LBB, which got the blades to the point where firm pressure would depress the tips.
  • We reconnected the in-vacuum cabling. In ≈15 places we opted to omit the Type 1 cable and use a F-F gender bender.
  • We reconnected all but four of the in-air cables.

Plan for week of 6/26

Mark and Enzo at Kamioka:

  • Double-check where gender-benders were used.
  • Finish connecting in-air cabling.
  • Debug all cabling.
  • Work with Simon to set up LSOL.

Fabian at Mitaka:

  • Design final ballast masses for IM, BF and SF assuming no BF rebuild (needs to be adaptable).
  • Check all items for BS flag/prism gluing are available (prisms, flags, jigs, mirror box, glue, scale, mixing tools etc).

Hirata-san at Mitaka:

  • Do new 3D CAD:
    • BS Test Hang build, with top of tank, full suspension, and LBB damper all reversed.
    • Final BS build, as above, but with everything BF down rotated back to original.
      • In-tank version.
      • On-assembly-frame version. (Adjust jack positions if possible, or leave for Mark to do.)
    • SR2 on BS assembly frame. (Adjust jack positions if possible, or leave for Mark to do.)

KAGRA/Subgroups/VIS/TypeB/Minutes (last edited 2022-04-22 13:34:51 by fabian.arellano)