Differences between revisions 303 and 304
Revision 303 as of 2018-07-13 13:30:17
Size: 2432
Editor: MarkBarton
Comment:
Revision 304 as of 2018-07-20 13:48:01
Size: 1648
Editor: MarkBarton
Comment:
Deletions are marked like this. Additions are marked like this.
Line 6: Line 6:
==== Report for week of 7/9 ====
 * We cleaned up after the heavy rain. There was no significant damage but some cardboard boxes of parts got wet and the contents needed to be moved to other containers and the boxes discarded. Water collected on the SR2 crane slot cover and had to be vacuumed away before the cover could be opened. A new section of corrugated roof was installed to minimize the problem for the future.
 * Enzo and team got all of the in-vacuum and in-air cables for the SF/... and PI properly routed and tested except (so far) for the geophones.
 * Hirata-san and team finished tuning of the F0 for SR2 and moved the PI into the SR2 cleanbooth. It turns out to be about 8 kg weaker than for SR3, whereas the SR2 chain is only 3 kg lighter, so we will have to do some combination of decompression, removing Cu segments and using a stronger CuBe spring (e.g., a Type A F0 FR blade instead of the F2 one in SR3). We closed the floor in the SRM area for safety, but we will probably reopen it as soon as next week for the SRM F0 build.
 * Hirata-san opened the SR3 tank, craned the LBB damper ring sandwich up to the top of the tank and suspended it.
 * Enzo and team corrected a lot of flipped connections on the SR3 PI LVDTs (primary<->secondary on the horizontal, primary<->actuation on the F0).
 * We added the arc weights and geophones and re-centered the IP. It seems stable and very soft, which is good.
==== Report for week of 7/17 ====
 * We checked the polarity of the IP LVDTs and flipped coil connections to get the standard arrangement.
 * We debugged an issue where one of the LVDT actuators had half the magnets in backwards resulting in no force.
 * We calibrated all the PI LVDTs.
 * We set the SF damper ring gap.
 * We prepped the suspension for craning, moved it into the tank and hooked the LBB damper ring rods.
 * Type A merged the SRM F0 with the correct IP, and we moved it out of the way (to the second floor behind the SRM tank).
 * We installed more cable clamps on the SR2 PI.
Line 14: Line 15:
==== Plan for week of 7/9 ====
==== Plan for week of 7/16 ====
 * Monday 7/16 is Sea Day.
 * Mark, Enzo, Hirata-san, Kozu-kun, Terrence at Kamioka Tue-Fri.
===== Main Sequence =====
 * Check/restore alignment of payload, especially optic pitch.
 * Testing, TFs.
 * Lock suspension.
 * Crane into tank.
==== Plan for week of 7/23 ====
 * Mark, Enzo, Fabian, Kozu-kun, Terrence, Panwei at Kamioka Mon-Fri.
 * Hirata-san at Kamioka Mon-Thu.
 * Mirapro moves assembly frame ≈7/25 (Wed).

===== SR3 =====
Line 26: Line 24:

===== F0/LBB Stuff =====
 * Install correct IP in PI #2.
 * Crane PI #2 to second floor.
 * Rebuild top filter of PI #2.
===== SR2 =====
 * Finish PI prep.
 * Crane into AF, suspend.
 * Start cable routing.
===== SRM =====
 * Prepare to assemble SRM metal mass (most parts due Wed 7/25).
 * Help Mirapro with AF move.
 * Start rebuild of top filter of PI #2.
Line 38: Line 39:
 * Hirata-san at Mitaka 7/27.

Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

Type B (Mark)

Report for week of 7/17

  • We checked the polarity of the IP LVDTs and flipped coil connections to get the standard arrangement.
  • We debugged an issue where one of the LVDT actuators had half the magnets in backwards resulting in no force.
  • We calibrated all the PI LVDTs.
  • We set the SF damper ring gap.
  • We prepped the suspension for craning, moved it into the tank and hooked the LBB damper ring rods.
  • Type A merged the SRM F0 with the correct IP, and we moved it out of the way (to the second floor behind the SRM tank).
  • We installed more cable clamps on the SR2 PI.

Plan for week of 7/23

  • Mark, Enzo, Fabian, Kozu-kun, Terrence, Panwei at Kamioka Mon-Fri.
  • Hirata-san at Kamioka Mon-Thu.
  • Mirapro moves assembly frame ≈7/25 (Wed).

SR3
  • Unlock suspension.
  • Rearrange cables.
  • Test.

SR2
  • Finish PI prep.
  • Crane into AF, suspend.
  • Start cable routing.

SRM
  • Prepare to assemble SRM metal mass (most parts due Wed 7/25).
  • Help Mirapro with AF move.
  • Start rebuild of top filter of PI #2.

To-Do Lists, Schedule

Vacation Info

  • Hirata-san at Mitaka 7/27.
  • Terrence: 8/24-26 f2f, then returns to Hong Kong.
  • Enzo: 9/14 JPS, 9/15 through 10/8 vacation in Chile.

KAGRA/Subgroups/VIS/TypeB/Minutes (last edited 2022-07-01 13:49:37 by fabian.arellano)