Differences between revisions 290 and 329 (spanning 39 versions)
⇤ ← Revision 290 as of 2018-06-01 11:52:28 →
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← Revision 329 as of 2018-09-21 17:22:03 → ⇥
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Editor: MarkBarton
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Deletions are marked like this. Additions are marked like this.
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==== 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.		 ==== Report for week of 9/17 ====
 * Monday 9/17 was holiday.
 * We optimized the trim mass on the SF to get more balance torque with less total mass. We now have a reserve of 480 g for the yaw pico.
 * We set the SF damper gap to 6 mm.
 * We set the SR2 pitch with the optic lever, aligned the IRM, and set all the OSEMs to have good clearance and midrange output.
 * We locked the SR2 suspension, craned it into the tank and hooked the LBB damper rings (but not the LBB yet).
 * With help from Ohishi-san, we removed the First Contact from SR2.
 * Mark did an audit of all the electronics boxes and updated the item list and S-number file cards on JGWDoc.
 * Mark added some thin arc weights to the inventory and finalized the number of various types to order (8*38 mm + 9*10 mm).
 * Panwei copied control filters over from the SR3.
 
==== Plan for week of 9/24 ====
 * Monday 9/24 is holiday (Autumn Equinox).
 * Mark, Hirata-san, Fabian, Panwei at Kamioka Tue-Fri.
===== SR2 =====
 * Move SR2 in-air cables.
 * Unlock and realign suspension.
===== SRM =====
 * Set pitch of SRM and RM, tighten clamps, remove winch system.
 * Weigh IM/... section.
 * Build up SS to BF level.
 * Add BF.
 * Suspend IM and tweak height/balance.
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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.
 * 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 10/1 ====
 * Mark, Hirata-san, Fabian, Panwei at Kamioka Mon-Fri.
===== SRM =====
 * Cable/test BF.
 * Install IRM.
 * Install/cable/test IM OSEMs.
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==== 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.		 ==== Plan for week of 10/8 ====
 * Monday 10/8 is Sports Day.
 * Enzo returns Tuesday 10/9.
 * Mark and Terrence (plus TBD) at Kamioka Mon-Fri.
 * Enzo, Hirata-san, Fabian and Panwei at Kamioka Tue-Fri.
===== SR2/SR3 =====
 * Terrence to set up LEN half of SR3 OL and, time permitting, TILT and LEN for SR2.
===== SRM =====
 * Continue installation.
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 * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7779|JGW-L1807779-v1 Type B Schedule (SR)]]  * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7779|JGW-L1807779 Type B Schedule (SR)]]
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==== Vacation Info ==== ==== Vacation/Visitor Info ====
 * Enzo: 9/15 through 10/8 vacation in Chile.
 * Terrence: 10/8-12, 10/29-11/2 at Kamioka.

Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

Type B (Mark)

Report for week of 9/17

  • Monday 9/17 was holiday.
  • We optimized the trim mass on the SF to get more balance torque with less total mass. We now have a reserve of 480 g for the yaw pico.
  • We set the SF damper gap to 6 mm.
  • We set the SR2 pitch with the optic lever, aligned the IRM, and set all the OSEMs to have good clearance and midrange output.
  • We locked the SR2 suspension, craned it into the tank and hooked the LBB damper rings (but not the LBB yet).
  • With help from Ohishi-san, we removed the First Contact from SR2.
  • Mark did an audit of all the electronics boxes and updated the item list and S-number file cards on JGWDoc.
  • Mark added some thin arc weights to the inventory and finalized the number of various types to order (8*38 mm + 9*10 mm).
  • Panwei copied control filters over from the SR3.

Plan for week of 9/24

  • Monday 9/24 is holiday (Autumn Equinox).
  • Mark, Hirata-san, Fabian, Panwei at Kamioka Tue-Fri.

SR2
  • Move SR2 in-air cables.
  • Unlock and realign suspension.

SRM
  • Set pitch of SRM and RM, tighten clamps, remove winch system.
  • Weigh IM/... section.
  • Build up SS to BF level.
  • Add BF.
  • Suspend IM and tweak height/balance.

Plan for week of 10/1

  • Mark, Hirata-san, Fabian, Panwei at Kamioka Mon-Fri.

SRM
  • Cable/test BF.
  • Install IRM.
  • Install/cable/test IM OSEMs.

Plan for week of 10/8

  • Monday 10/8 is Sports Day.
  • Enzo returns Tuesday 10/9.
  • Mark and Terrence (plus TBD) at Kamioka Mon-Fri.
  • Enzo, Hirata-san, Fabian and Panwei at Kamioka Tue-Fri.

SR2/SR3
  • Terrence to set up LEN half of SR3 OL and, time permitting, TILT and LEN for SR2.

SRM
  • Continue installation.

To-Do Lists, Schedule

Vacation/Visitor Info

  • Enzo: 9/15 through 10/8 vacation in Chile.
  • Terrence: 10/8-12, 10/29-11/2 at Kamioka.

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