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==== Plan for week of 5/28 ====
 * Mark, Enzo at Kamioka Mon-Fri.
 * Hirata-san at Kamioka Tue-Fri. (Mon is monthly Mitaka day.)
 * Matteo at Kamioka from Tue. He may help Type B to get experience.
 * Kozu-kun at Kamioka Mon only. (Rest of week is job interviews.)
 * --
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 * Build up security structure to SF level.  * Crane in security structure disk at SF level.
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 * Add budgeted ballast mass to SF and weigh SF/... section.
 * Cable, test SF LVDT and FR.
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 * Any unfinished SR3 SF/... stuff.
 * Add budgeted ballast mass to SF and weigh SF/... section.
 * Cable, test SF LVDT and FR.
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 * Make LBB blade sets (or at least 3 of 9).

Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

Type B (Mark)

Report for week of 5/28

  • Enzo tested the LVDT driver repaired by Tanaka-san - it was fine.
  • Fujii-kun and Enzo finished assembling a batch of 4 geophones and took test data.
  • Hirata-san modified some Promec masses (drilling out the threads on 2 of 4 holes) so we could use two layers of them inside the BF.
  • Hirata-san installed maraging rod receptacles in the LBB damper rings, and in the bottom of PIs #3 and #1 (for the SF damper rings).
  • After consulting with various people, Hirata-san installed the second half of the LBB top ring in the chamber, simply omitting the pillar and screw associated with the badly threaded hole.
  • Hirata-san took delivery of the screws for the LBB blade units, made up 9 blade units and installed 6 of them on PI #3 and #1 (for SR3 and SR2).
  • Hirata-san made up a set of PI cable clamps and installed them on PI #3 (for SR3).
  • Hirata-san removed the prototype blades from PI #3 to get ready for testing the final blades.
  • We located the #355 disk and #356 poles for the next level of the security structure up to the SF and installed the poles.
  • We installed ballast mass in the BF. After some trial and error we settled on 16 Promec masses (7.1 kg) inside the BF and 5 D1808104-4 and 3 D1808104-5 masses (540 g) on the cap.
  • Enzo and Fujii-kun did several rounds of TFs on the BF/... section of the suspension and debugged a problem with dewhitening filters not being installed in the OSEMINF filter bank.
  • Enzo installed damping filters for the IM OSEMs.

Plan for week of 6/4

  • Mark, Enzo, Hirata-san, Kozu-kun at Kamioka Tue-Fri. (Mon is NAOJ medical checkup.)
  • --
  • Cable and test BF cap picos.
  • Crane in security structure disk at SF level.
  • Crane in SF and remove cap.
  • Hook BF and adjust total ballast.
  • Route cables through SF-BF flying saucer up to bottom of SF.
  • Adjust BF trim mass.
  • Readjust payload.
  • Take TFs.
  • Characterize final F0 blades.

Plan for week of 6/11

  • Mark Enzo, Hirata-san, Kozu-kun at Kamioka Tue-Fri (Mon is compensation day for f2f.)
  • --
  • Any unfinished SR3 SF/... stuff.
  • Add budgeted ballast mass to SF and weigh SF/... section.
  • Cable, test SF LVDT and FR.
  • Rebuild F0 #3 for SR3.
  • Park F0 #1 (for SR2) in top of SR3 assembly frame.
  • Move F0 #3 behind SR3.

To-Do Lists, Schedule

Vacation Info

KAGRA/Subgroups/VIS/TypeB/Minutes (last edited 2022-06-24 12:23:36 by fabian.arellano)