Differences between revisions 7 and 192 (spanning 185 versions)
⇤ ← Revision 7 as of 2016-04-21 14:52:06 →
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← Revision 192 as of 2017-09-22 13:57:37 → ⇥
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Editor: MarkBarton
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 * Hirata-san produced a near-final Inventor assembly of the BS on the assembly frame, for use in writing the assembly procedure.
  * Includes assembly frame modifications suggested by Mirapro, including feet, wheels, lifting eyes, thicker crossbars under BF, IM etc.
  * Includes final rail system except for interface plate to mirror box.
  * Includes full PI with ballast masses.
  * Includes cable clamps.
  * Includes correct versions of BF and SF.
  * Includes new BF pushrod parts to work around different placement of blade screws in new version of BF.
  * Includes cleanbag support bars.
  * Includes key parts of mirror box (enough to check for interference) - needs more work.
  * Does not include various invisible duplicate assemblies.
 * Got status from Miyakawa-san on electronics - there should be enough of the boxes AEL is supplying.
 * Cleanbag design was finalized; Aso-san is ordering: [[attachment:160419-ﾁｬﾝﾊﾞｰｶﾊﾞｰⅡ型.pdf]]
 * Quote for flags and prisms was received, but expensive - may drop rigid flag design.
 * The mirror box will require only very minor modifications for flags and prisms - Tatsumi-san will arrange immediately.
 * Fabian worked on understanding Sekiguchi-san's control design to help decide optimum wire thickness.
 * Mark worked on install procedure and schedule.
 * Takahashi-san enquired with NIKHEF about oscillator cards for LVDT chassis - lead time would be 3-4 months.
 * 		=== Type B (Mark) ===
==== Past week report ====
At Kamioka (Mark, Ohishi-san, Fabian, Enzo, Hirata-san, Yoshioka-kun, Kozu-kun):
 * We put lock nuts on the F0 FR and calibrated the F0 LVDT against FR position and keystone height.
 * Enzo traced the issue with the geophones to a specific cable.
 * We measured the BF and F0 GAS resonant frequencies.
 * We adjusted the spacing of the SR damper.
 * We double-checked the BS pitch with the OL.
 * We debugged the PI yaw mechanism. We managed to get the return spring properly adjusted, but the stepper motor tends to jam because of the strange design.
 * '''We prepared the suspension for lifting and craned it into the tank.'''
 * Hirata-san fixed an issue with one of the nailheads on the LBB intermediate ring support rods not properly seating, by removing the rod and reinstalling it upside down (with the problem nailhead in a less critical position).
 * Enzo and team moved all the in-air cables from the assembly frame to the tank.
 * Fabian and Ohishi-san unlocked the bottom section of the suspension and got it hanging freely.
 
==== Plan for week of 9/25 ====
Mark, Fabian, Enzo (Mon, Tue), Ohishi-san (Tue, Fri), Hirata-san, Yoshioka-kun (Tue, Wed, Fri), Kozu-kun
 * Finish moving in-air cabling and feedthroughs and reconnect in-vacuum cables (through Cu O-rings).
 * Unlock rest of suspension and readjust.
 * Debug electronics.
 * Unclamp LBB ring "sandwich" so LBB Cu ring is suspended on upper rods.
 * Install LBB lower rods and hook LBB.
 * Adjust LBB damper Cu-magnet gap.
 * Measure required ballast for LBB.
 * Remove First Contact, try OL.
 * Prepare for SR2 work.

==== Plan for week of 10/2 ====
Kamioka: Mark, Enzo, Fabian, Ohishi-san.
 * TFs etc.
Mitaka: Hirata-san?
 * SF design/purchasing.

==== Vacation Info ====
Mark: 10/16-24
Enzo: 9/27-29

Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

Type B (Mark)

Past week report

At Kamioka (Mark, Ohishi-san, Fabian, Enzo, Hirata-san, Yoshioka-kun, Kozu-kun):

  • We put lock nuts on the F0 FR and calibrated the F0 LVDT against FR position and keystone height.
  • Enzo traced the issue with the geophones to a specific cable.
  • We measured the BF and F0 GAS resonant frequencies.
  • We adjusted the spacing of the SR damper.
  • We double-checked the BS pitch with the OL.
  • We debugged the PI yaw mechanism. We managed to get the return spring properly adjusted, but the stepper motor tends to jam because of the strange design.

  • We prepared the suspension for lifting and craned it into the tank.

  • Hirata-san fixed an issue with one of the nailheads on the LBB intermediate ring support rods not properly seating, by removing the rod and reinstalling it upside down (with the problem nailhead in a less critical position).
  • Enzo and team moved all the in-air cables from the assembly frame to the tank.
  • Fabian and Ohishi-san unlocked the bottom section of the suspension and got it hanging freely.

Plan for week of 9/25

Mark, Fabian, Enzo (Mon, Tue), Ohishi-san (Tue, Fri), Hirata-san, Yoshioka-kun (Tue, Wed, Fri), Kozu-kun

  • Finish moving in-air cabling and feedthroughs and reconnect in-vacuum cables (through Cu O-rings).
  • Unlock rest of suspension and readjust.
  • Debug electronics.
  • Unclamp LBB ring "sandwich" so LBB Cu ring is suspended on upper rods.
  • Install LBB lower rods and hook LBB.
  • Adjust LBB damper Cu-magnet gap.
  • Measure required ballast for LBB.
  • Remove First Contact, try OL.
  • Prepare for SR2 work.

Plan for week of 10/2

Kamioka: Mark, Enzo, Fabian, Ohishi-san.

  • TFs etc.

Mitaka: Hirata-san?

  • SF design/purchasing.

Vacation Info

Mark: 10/16-24 Enzo: 9/27-29

KAGRA/Subgroups/VIS/TypeB/Minutes (last edited 2022-10-28 10:02:46 by fabian.arellano)