Differences between revisions 159 and 180 (spanning 21 versions)
⇤ ← Revision 159 as of 2017-06-23 20:28:14 →
Size: 2225
Editor: MarkBarton
Comment:
← Revision 180 as of 2017-08-25 13:48:16 → ⇥
Size: 1874
Editor: MarkBarton
Comment:
Deletions are marked like this. Additions are marked like this.
Line 7: Line 7:
At Kamioka (Mark, Fabian, Enzo, Hirata-san):
 * We disconnected the in-vacuum and in-air cabling from the feedthroughs.
 * We removed crossbars below BF and SF.
 * We set the SF damper to 4 mm clearance.
 * We adjusted the jacks to nominal height.
 * We removed the geophones and PI yaw stepper for craning.
 * We craned the suspension into the tank, and hooked the LBB Cu ring.
 * We replaced the geophones etc.
 * We unlocked all but the IP and adjusted the jacks until the pendulum was centered in the security structure.
 * We unlocked the IP and adjusted to to center with the jacks and fishing rods.
 * We craned the vacuum tank lid+ring back on, and then removed just the lid (only).
 * We unclamped the LBB damper rings and removed the spacers.
 * We removed the blocks and shims supporting the LBB, inserted the long screw feet and hooked the LBB to the Cu damper ring.
 * We added 2*31.5 kg of ballast to the LBB, which got the blades to the point where firm pressure would depress the tips.
 * We reconnected the in-vacuum cabling. In ≈15 places we opted to omit the Type 1 cable and use a F-F gender bender.
 * We reconnected all but four of the in-air cables.		 At Kamioka (Mark, Ohishi-san, Enzo, Yoshioka-kun):
 * We installed the cut-down ballast mass under the IM and tweaked the IM height and balance.
 * We checked the range of the BF FR.
 * We adjusted the BF yoke by 2.5 mm to make it give ≈0 output for nominal height.
 * We found a good gain setting for the LVDT driver and calibrated the BF LVDT.
 * We set up the optical sensors facing the RM.
 * We assembled the IRM (with OSEMs) around the IM and got it mostly adjusted.
 * We changed the k1visbs model to restore the as-designed mapping of OSEMs to DAQ channels.
 * We confirmed that the BF LVDT actuation coil and the TM OSEM coils were working.
 * We connected up the IRM OSEMs (with the new Type 5-1.7 cables) but found there was an electrical issue: all the OSEMs are reading back the same constant value, around 1115.
 * We left the suspension in a state suitable for TFs from BF GAS actuation to sensing (in vertical) and from RM OSEM actuation to the optical sensors (in horizontal) over the weekend.
At Mitaka (Hirata-san):
 * Hirata-san did 2D drawings of the SR LBB rods and sent off an RFQ.
 * Hirata-san did several cost-reduction negotiations with Mirapro.
Line 24: Line 22:
==== Plan for week of 6/26 ====
Mark and Enzo at Kamioka:
 * Double-check where gender-benders were used.
 * Finish connecting in-air cabling.
 * Debug all cabling.
 * Work with Simon to set up LSOL.
Fabian at Mitaka:
 * Design final ballast masses for IM, BF and SF assuming no BF rebuild (needs to be adaptable).
 * Check all items for BS flag/prism gluing are available (prisms, flags, jigs, mirror box, glue, scale, mixing tools etc).
Hirata-san at Mitaka:
 * Do new 3D CAD:
  * BS Test Hang build, with top of tank, full suspension, and LBB damper all reversed.
  * Final BS build, as above, but with everything BF down rotated back to original.
   * In-tank version.
   * On-assembly-frame version. (Adjust jack positions if possible, or leave for Mark to do.)
  * SR2 on BS assembly frame. (Adjust jack positions if possible, or leave for Mark to do.)
==== Plan for week of 8/28 ====
Kamioka: Mark (except Tue), Ohishi-san, Fabian (except Tue), Enzo (except Tue), Hirata-san, Yoshioka-kun (Fri), Kozu-kun (Thu, Fri).
 * Fix/adjust IRM OSEMs.
 * Add BF cap; cable and test BF-1 and BF-2 picos.
 * Lift and weigh BF/IRM/IM/RM/BS; adjust ballast mass.
 * Crane in SF.
 * Suspend BF/IRM/IM/RM/BS.

==== Plan for week of 9/4 ====
 * Install SF cap; route cables.
 * Lift and weigh SF/BF/IRM/IM/RM/BS.
 * Adjust SF ballast.

==== Vacation Info ====
Mark: TBD Mid-Oct

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, Enzo, Yoshioka-kun):

  • We installed the cut-down ballast mass under the IM and tweaked the IM height and balance.
  • We checked the range of the BF FR.
  • We adjusted the BF yoke by 2.5 mm to make it give ≈0 output for nominal height.
  • We found a good gain setting for the LVDT driver and calibrated the BF LVDT.
  • We set up the optical sensors facing the RM.
  • We assembled the IRM (with OSEMs) around the IM and got it mostly adjusted.
  • We changed the k1visbs model to restore the as-designed mapping of OSEMs to DAQ channels.
  • We confirmed that the BF LVDT actuation coil and the TM OSEM coils were working.
  • We connected up the IRM OSEMs (with the new Type 5-1.7 cables) but found there was an electrical issue: all the OSEMs are reading back the same constant value, around 1115.
  • We left the suspension in a state suitable for TFs from BF GAS actuation to sensing (in vertical) and from RM OSEM actuation to the optical sensors (in horizontal) over the weekend.

At Mitaka (Hirata-san):

  • Hirata-san did 2D drawings of the SR LBB rods and sent off an RFQ.
  • Hirata-san did several cost-reduction negotiations with Mirapro.

Plan for week of 8/28

Kamioka: Mark (except Tue), Ohishi-san, Fabian (except Tue), Enzo (except Tue), Hirata-san, Yoshioka-kun (Fri), Kozu-kun (Thu, Fri).

  • Fix/adjust IRM OSEMs.
  • Add BF cap; cable and test BF-1 and BF-2 picos.
  • Lift and weigh BF/IRM/IM/RM/BS; adjust ballast mass.
  • Crane in SF.
  • Suspend BF/IRM/IM/RM/BS.

Plan for week of 9/4

  • Install SF cap; route cables.
  • Lift and weigh SF/BF/IRM/IM/RM/BS.
  • Adjust SF ballast.

Vacation Info

Mark: TBD Mid-Oct

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