Differences between revisions 162 and 191 (spanning 29 versions)
⇤ ← Revision 162 as of 2017-06-30 13:54:45 →
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Editor: MarkBarton
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← Revision 191 as of 2017-09-15 13:27:49 → ⇥
Size: 3359
Editor: MarkBarton
Comment:
Deletions are marked like this. Additions are marked like this.
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At Kamioka (Mark, Enzo, Simon, Type Bp team):
 * Mark remade the BF pico adapter cable which was poorly made and had also been damaged.
 * The Type Bp team tided up the BS rack and made new labels for many cables (thanks!).
 * Enzo connected up the in-air cables for the picos and steppers.
 * Mark and Enzo renumbered the PI LVDTs, geophones and LVDTs to make a consistent scheme working anticlockwise.
 * Enzo and Mark debugged all the cables. The only problem we couldn't solve was that the actuator coil for PI LVDT #0 is open-circuit at the connector on the LVDT. (It has been intermittent but worked before the craning.) We may have to redo the connector or replace the LVDT. Limited TFs will be possible in the next week.
 * Simon set up the LSOL and was easily able to get a return beam from the mirror on the dummy BS.
 * Shoda-san copied over the LSOL section of the PR3 real-time model into the BS model and made other improvements (thanks!).
 * Mark brought home		 At Kamioka (Mark, Ohishi-san, Fabian, Enzo, Hirata-san, Yoshioka-kun, Kozu-kun):
 * We disconnected the SF/... section and reinstalled the F0-SF rod with the hex cable clamp attached.
 * We debugged an issue with the actuation (the real-time model needed rebooting).
 * We routed all the SF/... cables up to the bottom of the PI, and then to the feedthroughs.
 * We unlocked the F0 keystone and experimented to find the amount of mass needed on the SF (≈845 g).
 * We attached the SF trim mass, adjusting it laterally so that the SF was level in pitch and roll.
 * We corrected some errors on the MEDM screens (some broken links and Take/Restore Safe.snap buttons).
 * We cabled all the PI items through to the rack and did very basic testing.
 * We disconnected the security structure from the assembly frame and adjusted the PI till the SS was vertical.
 * We unlocked the IP and adjusted the PI jacks and FRs till the IP was centered.
 * We passed the halves of the LBB Cu damping ring (less the Cu) into the chamber and joined them.
 * We put the magnets on the LBB damper ring using the template.
 * We locked various combinations of keystones and measured the vertical resonance frequencies of the unlocked filters.
 * We spent time on getting the geophones working. The original descrambler adapters had gone missing, so Enzo created three new ones. We borrowed a cable to replace one that had broken. The geophone distributor (S1402167) failed (no power on the negative rail), and a replacement borrowed from SR3 (S1605513) kept switching off.
Line 17: Line 22:
At Mitaka (Fabian, Hirata-san):
 * Fabian finished designing final trim masses for IM/BF/SF for the final hang of the BS and passed it to Hirata-san to make drawings and get quotes.
 * Hirata-san requested quotes for the replaceable-jaw version of the BS wire clamps.
 * Fabian and Hirata-san gathered needed items for the BS prism/flag gluing.
 * Hirata-san designed receptacles for the new rods with 8 mm heads and requested quotes.		 ==== Plan for week of 9/19 ====
No work Mon 9/18 (敬老の日)<<BR>>
Mark, Fabian, Enzo, Ohishi-san, Hirata-san, Yoshioka-kun (Tue, Wed, Thu, Fri), Kozu-kun
 * Double check BS pitch with OL.
 * Adjust SF damper ring to correct gap.
 * Install lock nuts on F0 GAS FR at TBD positions.
 * Lock BF and F0 keystones (but ''not'' SF keystone).
 * Lock RM to BS and IRM to IM.
 * Lock RM, IRM and BF (but not SF) to security structure.
 * Lock IP.
 * Remove F0 keystone top plate (including yaw stepper) and immobilize SF/... in yaw.
 * Attach lifting fixture.
 * Remove BF- and SF-level crossbars.
 * Remove geophones for craning.
 * Disconnect in-vacuum cables from feedthrough and coil neatly for craning.
 * Attach lifting plates.
 * Attach Cu segments to LBB damper ring (needs Cu segments and BUMAX countersunk screws, expected 9/20).
 * Pass halves of LBB magnet ring into tank, join, and make sandwich for craning.
 * Crane tank lid off.
 * Crane LBB damper rings to top of tank and suspend.
 * Crane suspension out of assembly frame.
 * Attach LBB upper rods to LBB blade tips and rotate suspension 45° clockwise.
 * Crane suspension into tank and connect upper rods to LBB Cu ring.
 * Unclamp LBB ring "sandwich" so LBB Cu ring is suspended on upper rods.
 * Install LBB lower rods and hook LBB.
 * Measure required ballast for LBB.
 * Unlock suspension and readjust.
 * Move in-air cabling and feedthroughs and reconnect in-vacuum cables (through Cu O-rings).
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==== Plan for week of 7/3 ====
 * Do prism/flag gluing on real BS at Kashiwa (whole team).
 * Do new 3D CAD (Hirata-san):
  * SR2 on BS assembly frame. (Adjust jack positions if possible, or leave for Fabian/Mark to do.)
  * Final BS build, SS/PI/SF as for Test Hang but with BF/IRM/IM/BS/RM down rotated back to original direction.
   * On-assembly-frame version. (Adjust jack positions if possible, or leave for Mark to do.)
   * In-tank version.
 * Solve arc weight versus magic wand problem.
 * Do mass budget for LBB - design ballast masses (Fabian)
 * Run TFs, make improvements to real-time model (Mark, Enzo).		 ==== Plan for week of 9/25 ====
TBD
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==== Plan for week of 7/10 ====
Mark and Enzo at Kamioka:
 * Fix broken LVDT actuator coil.
 * Learn how Miyo-kun's pico driver software works and make improvements.
 * Test picos and steppers more fully.
 * Finish tidying rack and labeling cables.
Fabian and Hirata-san at Mitaka.
 * Design SR assembly frame.
 * Inventory for SR.		  * Debug cabling.
 * Run TFs.
 * Install LSOL?

==== Vacation Info ====
Mark: 10/16-24

Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

Type B (Mark)

Past week report

At Kamioka (Mark, Ohishi-san, Fabian, Enzo, Hirata-san, Yoshioka-kun, Kozu-kun):

  • We disconnected the SF/... section and reinstalled the F0-SF rod with the hex cable clamp attached.
  • We debugged an issue with the actuation (the real-time model needed rebooting).
  • We routed all the SF/... cables up to the bottom of the PI, and then to the feedthroughs.
  • We unlocked the F0 keystone and experimented to find the amount of mass needed on the SF (≈845 g).
  • We attached the SF trim mass, adjusting it laterally so that the SF was level in pitch and roll.
  • We corrected some errors on the MEDM screens (some broken links and Take/Restore Safe.snap buttons).
  • We cabled all the PI items through to the rack and did very basic testing.
  • We disconnected the security structure from the assembly frame and adjusted the PI till the SS was vertical.
  • We unlocked the IP and adjusted the PI jacks and FRs till the IP was centered.
  • We passed the halves of the LBB Cu damping ring (less the Cu) into the chamber and joined them.
  • We put the magnets on the LBB damper ring using the template.
  • We locked various combinations of keystones and measured the vertical resonance frequencies of the unlocked filters.
  • We spent time on getting the geophones working. The original descrambler adapters had gone missing, so Enzo created three new ones. We borrowed a cable to replace one that had broken. The geophone distributor (S1402167) failed (no power on the negative rail), and a replacement borrowed from SR3 (S1605513) kept switching off.

Plan for week of 9/19

No work Mon 9/18 (敬老の日)
Mark, Fabian, Enzo, Ohishi-san, Hirata-san, Yoshioka-kun (Tue, Wed, Thu, Fri), Kozu-kun

  • Double check BS pitch with OL.
  • Adjust SF damper ring to correct gap.
  • Install lock nuts on F0 GAS FR at TBD positions.

  • Lock BF and F0 keystones (but not SF keystone).

  • Lock RM to BS and IRM to IM.
  • Lock RM, IRM and BF (but not SF) to security structure.
  • Lock IP.
  • Remove F0 keystone top plate (including yaw stepper) and immobilize SF/... in yaw.
  • Attach lifting fixture.
  • Remove BF- and SF-level crossbars.
  • Remove geophones for craning.
  • Disconnect in-vacuum cables from feedthrough and coil neatly for craning.
  • Attach lifting plates.
  • Attach Cu segments to LBB damper ring (needs Cu segments and BUMAX countersunk screws, expected 9/20).
  • Pass halves of LBB magnet ring into tank, join, and make sandwich for craning.
  • Crane tank lid off.
  • Crane LBB damper rings to top of tank and suspend.
  • Crane suspension out of assembly frame.
  • Attach LBB upper rods to LBB blade tips and rotate suspension 45° clockwise.
  • Crane suspension into tank and connect upper rods to LBB Cu ring.
  • Unclamp LBB ring "sandwich" so LBB Cu ring is suspended on upper rods.
  • Install LBB lower rods and hook LBB.
  • Measure required ballast for LBB.
  • Unlock suspension and readjust.
  • Move in-air cabling and feedthroughs and reconnect in-vacuum cables (through Cu O-rings).

Plan for week of 9/25

TBD

  • Debug cabling.
  • Run TFs.
  • Install LSOL?

Vacation Info

Mark: 10/16-24

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