Differences between revisions 289 and 291 (spanning 2 versions)
Revision 289 as of 2018-06-01 11:49:44
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Editor: MarkBarton
Comment:
Revision 291 as of 2018-06-08 13:31:14
Size: 2355
Editor: MarkBarton
Comment:
Deletions are marked like this. Additions are marked like this.
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 * 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.
 * Enzo and Mark debugged the BS BIO connections and finally got it working. There were a total of four issues identified:
  * A wrong block used in the BS real-time model.
  * The real-time model deciding to treat the cards as numbered backwards from the slot order or the jumper settings.
  * Two unlabeled cables that may have been swapped.
  * The GAS coil driver and associated cables had been labeled HPCD #1 whereas it had been #0 in the diagram.
 * Hirata-san and Kozu-kun received the final F0 blades, characterized 6 of them and, with help from Takahashi-san, installed a matched set of 3 into PI #3. It appears to be 6 kg short of the load capacity that was targeted, but still with 4 kg of margin. It is close to having a good frequency but needs another round of tuning.
 * Mark and Terrence fixed an issue with the security structure - due to a screenshot of the CAD not updated from the BS procedure to the SR one, the BF ring had been placed 180° off in yaw. We suspended the BF from the load gauge adapter, reconfigured the BF jacks to support the ring instead of the BF, and rotated the ring. Mark corrected the procedure.
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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.)
==== Plan for week of 6/11 ====
 * Mark Enzo, Hirata-san, Kozu-kun, Terrence at Kamioka Tue-Fri (Mon is compensation day for f2f.)
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==== 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.
 * Build up security structure to SF level.
 * Crane in SF and remove cap.
 * Hook BF and adjust total ballast.
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 * Add minimal ballast mass to SF (rough balance only) and weigh SF/... section.
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 * Add budgeted ballast mass to SF and weigh SF/... section.
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 * 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.)
 * --
 * Rebuild F0 #3 for SR3.
 * Add calculated ballast to SF.
 * Finish tuning F0 #3 for SR3.
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 * Make LBB blade sets (or at least 3 of 9).  * Move F0 #1 to "factory" area (in front of SRM) and start rebuild.

==== Plan for week of 6/18 ====
 * Mark Enzo, Hirata-san, Kozu-kun, Terrence at Kamioka Mon-Fri.
 * --
 * Install PI.
 * Suspend SF/... section.
 * Lots of cabling.

Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

Type B (Mark)

Report for week of 5/28

  • Enzo and Mark debugged the BS BIO connections and finally got it working. There were a total of four issues identified:
    • A wrong block used in the BS real-time model.
    • The real-time model deciding to treat the cards as numbered backwards from the slot order or the jumper settings.
    • Two unlabeled cables that may have been swapped.
    • The GAS coil driver and associated cables had been labeled HPCD #1 whereas it had been #0 in the diagram.
  • Hirata-san and Kozu-kun received the final F0 blades, characterized 6 of them and, with help from Takahashi-san, installed a matched set of 3 into PI #3. It appears to be 6 kg short of the load capacity that was targeted, but still with 4 kg of margin. It is close to having a good frequency but needs another round of tuning.
  • Mark and Terrence fixed an issue with the security structure - due to a screenshot of the CAD not updated from the BS procedure to the SR one, the BF ring had been placed 180° off in yaw. We suspended the BF from the load gauge adapter, reconfigured the BF jacks to support the ring instead of the BF, and rotated the ring. Mark corrected the procedure.

Plan for week of 6/11

  • Mark Enzo, Hirata-san, Kozu-kun, Terrence at Kamioka Tue-Fri (Mon is compensation day for f2f.)
  • --
  • Route cables through SF-BF flying saucer up to bottom of SF.
  • Add minimal ballast mass to SF (rough balance only) and weigh SF/... section.
  • Adjust BF trim mass.
  • Readjust payload.
  • Take TFs.
  • Cable, test SF LVDT and FR.
  • Add calculated ballast to SF.
  • Finish tuning F0 #3 for SR3.
  • Park F0 #1 (for SR2) in top of SR3 assembly frame.
  • Move F0 #3 behind SR3.
  • Move F0 #1 to "factory" area (in front of SRM) and start rebuild.

Plan for week of 6/18

  • Mark Enzo, Hirata-san, Kozu-kun, Terrence at Kamioka Mon-Fri.
  • --
  • Install PI.
  • Suspend SF/... section.
  • Lots of cabling.

To-Do Lists, Schedule

Vacation Info

KAGRA/Subgroups/VIS/TypeB/Minutes (last edited 2022-07-29 13:18:56 by fabian.arellano)