Differences between revisions 304 and 305
Revision 304 as of 2018-07-20 13:48:01
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Revision 305 as of 2018-07-27 14:19:43
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Deletions are marked like this. Additions are marked like this.
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==== 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.
==== Report for week of 7/23 ====
 * We finished adding cable clamps to the SR2 PI and SF.
 * We craned in the SR2 PI and installed the PI-SF rod. As expected, there was not quite enough load capacity for even a 2 Cu-segment SF.
 * We changed the CuBe spring on the SR2 PI from an F2 type to an F1 and got about an extra 2 kg, which is plenty for 2 Cu segments.
 * We moved the feedthroughs from the SR3 assembly frame to the SR3 tank. Mirapro then moved the assembly frame to the SRM area. Mirapro also moved the duct on the +Y side of the SR3 tank to give us access to that side.
 * We laid a new set of SR3 in-air cables running directly to the tank. (We will repurpose the original set for SRM.)
 * We reconnected the SR3 cables on both sides of the feedthroughs. We had to adjust the routing of the in-vacuum ones several times to stop them touching the tank, but we finally found a good solution.
 * With help from Ohishi-san we removed the First Contact and then unlocked the whole suspension by stages. We need to check the optic pitch and do a little more mechanical adjustment but we were able to take TFs and implement IM and GAS control filters.
 * Hirata-san and Fujii-kun received most of the SRM metal mass parts, did inventory and practiced some of the key steps in the assembly, especially inserting the Sol-Black coated parts without touching the delicate surfaces.
 * Mark did inventory of the BIO stuff for the WD and of the OL parts.
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==== 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).
==== Plan for week of 7/30 ====
 * Mark, Enzo, Hirata-san, Fabian, Kozu-kun, Terrence, Panwei at Kamioka Mon-Fri.
 * Kozu-kun works at Mozumi Mon, Fri, and Thu afternoon.
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 * Unlock suspension.
 * Rearrange cables.
 * Test.
 * Finalize optic pitch, OSEM alignment.
 * Hook LBB, add ballast mass, set up temporary OL (horizontal beam, pitch/yaw only).
 * Identify/acquire items required for final OL (steering mirrors, second QPD, lens, collimator).
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 * Finish PI prep.
 * Crane into AF, suspend.
 * Start cable routing.
 * Fix issue with PI/SS/chain alignment.
 * Put magnets on SR damper ring (2 Cu segment pattern).
 * Remove PI-SF rod temporarily, install Cu segments and damper ring.
 * Do vertical height budget; choose optimum F0 keystone height.
 * Add estimated final ballast mass.
 * Do PI cable routing.
 * Adjust ballast/trim mass, with reserve for cables.
 
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 * 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.
 * Set up filter tuning area.
 * Tune F0 for SRM.
 * Add LBB blade units, cable clamps etc.
 * Check PI coil connections, IP LVDT magnets.
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 * 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 7/23

  • We finished adding cable clamps to the SR2 PI and SF.
  • We craned in the SR2 PI and installed the PI-SF rod. As expected, there was not quite enough load capacity for even a 2 Cu-segment SF.
  • We changed the CuBe spring on the SR2 PI from an F2 type to an F1 and got about an extra 2 kg, which is plenty for 2 Cu segments.

  • We moved the feedthroughs from the SR3 assembly frame to the SR3 tank. Mirapro then moved the assembly frame to the SRM area. Mirapro also moved the duct on the +Y side of the SR3 tank to give us access to that side.
  • We laid a new set of SR3 in-air cables running directly to the tank. (We will repurpose the original set for SRM.)
  • We reconnected the SR3 cables on both sides of the feedthroughs. We had to adjust the routing of the in-vacuum ones several times to stop them touching the tank, but we finally found a good solution.
  • With help from Ohishi-san we removed the First Contact and then unlocked the whole suspension by stages. We need to check the optic pitch and do a little more mechanical adjustment but we were able to take TFs and implement IM and GAS control filters.
  • Hirata-san and Fujii-kun received most of the SRM metal mass parts, did inventory and practiced some of the key steps in the assembly, especially inserting the Sol-Black coated parts without touching the delicate surfaces.
  • Mark did inventory of the BIO stuff for the WD and of the OL parts.

Plan for week of 7/30

  • Mark, Enzo, Hirata-san, Fabian, Kozu-kun, Terrence, Panwei at Kamioka Mon-Fri.
  • Kozu-kun works at Mozumi Mon, Fri, and Thu afternoon.

SR3
  • Finalize optic pitch, OSEM alignment.
  • Hook LBB, add ballast mass, set up temporary OL (horizontal beam, pitch/yaw only).
  • Identify/acquire items required for final OL (steering mirrors, second QPD, lens, collimator).

SR2
  • Fix issue with PI/SS/chain alignment.
  • Put magnets on SR damper ring (2 Cu segment pattern).
  • Remove PI-SF rod temporarily, install Cu segments and damper ring.
  • Do vertical height budget; choose optimum F0 keystone height.
  • Add estimated final ballast mass.
  • Do PI cable routing.
  • Adjust ballast/trim mass, with reserve for cables.

SRM
  • Set up filter tuning area.
  • Tune F0 for SRM.
  • Add LBB blade units, cable clamps etc.
  • Check PI coil connections, IP LVDT magnets.

To-Do Lists, Schedule

Vacation Info

  • 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)