Differences between revisions 156 and 183 (spanning 27 versions)
⇤ ← Revision 156 as of 2017-06-09 13:44:22 →
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← Revision 183 as of 2017-09-01 13:47:28 → ⇥
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Editor: MarkBarton
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Deletions are marked like this. Additions are marked like this.
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At Kamioka (Mark, Fabian, Enzo, Hirata-san):
 * Hirata-san and Mark reversed the support ring for the LBB damper to match the reversed suspension.
 * Hirata-san did a trial assembly of the magnet ring for the LLB damper and placed magnets on it with the template.
 * Hirata-san and Mark put the base pieces for the Cu ring in the chamber. However it turns out that the holes for attaching the joint pieces are incompletely threaded and we will have to run a tap through them.
 * We tested the geophones. At first one didn't work at all. This turned out to be a broken wire in one of the in-vacuum adapter cables. For the test we replaced the adapter with an old-style one (and removed the matching descrambler). A second geophone mostly works but saturates at a suspiciously low number of counts at the ADC (2000 instead of 20000).
 * We tested the PI horizontal LVDTs. The #1 (H2) one works but cable swaps showed that #0 and #2 have issues both at the tank end and at the card.
 * We decided on a final location for the stepper and pico drivers on the second floor. We moved the cables for the stepper drivers (using the outside cable trays) and laid new LAN and AC cables for the picos.
 * We recounted the used and spare cables now that the in-vacuum cabling appears to be final.		 At Kamioka (Mark, Ohishi-san, Fabian, Enzo, Hirata-san, Yoshioka-kun, Kozu-kun):
 * We solved the problem with the OSEMs: cables had been plugged into the confusingly named "PD current monitor" outputs (actually LED current monitors), not the "OSEM outputs".
 * We solved a problem with the real-time model freezing which turned out to be the IO chassis having lost power.
 * We took some mass off the IM to allow for the weight of the cables, and readjusted it in pitch and roll.
 * We aligned the IRM to the IM and set the OSEMs to mid-range.
 * We added ballast to the BF.
 * We changed the receptacles for the SF-BF rod. The low receptacle did not fit properly into the BF keystone and Hirata-san had to file it.
 * We fixed a broken wire on the BF yaw pico, retested the pico and added the BF cap.
 * We cabled and tested the BF cap picos.
 * We lifted the BF and weighed and balanced it.
 * We installed the SF ring and brought in the SF.
 * We cabled the SF LVDT and did a quick test (not a full calibration).
 * We replaced non-vacuum compatible cables in the PI, removed various sticky labels and wiped it with ethanol.
 * We tried to hook the SF-BF rod but found the hole in the hex cable clamp was too small for the 8 mm rod head. We enlarged the hole but then found the PEEK pieces were too loose. We tried using foil, but then managed to lose a PEEK piece into the BF, so we will need to remove the cap of the BF to get it.
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==== Plan for coming weeks ====
For more detail, see [[KAGRA/Subgroups/VIS/TypeB/ToDo]].		 ==== 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.
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Week of 6/12:
 * Cabling:
  * Debug/fix PI vertical LVDTs #0 and #2.
  * Calibrate PI vertical LVDT.
  * Debug/fix geophone #1.
  * Set yoke on PI vertical LVDT (if necessary).
  * Cable and test PI yaw stepper.
  * Cable and test PI vertical stepper.
  * Cable and test PI horizontal steppers.
  * Cable and test PI horizontal LVDTs.
  * Calibrate PI horizontal LVDTs.
 * Prepare LBB.
  * Attach LBB outriggers and rod receptacles.
 * Prepare LBB Cu ring.
  * Remove from tank, fix incompletely threaded holes, reinstall in tank.
  * Lay down spacers to protect magnets (in next step).
 * Prepare LBB magnet ring.
  * Disassemble.
  * Pass pieces into tank.
  * Reassemble on top of Cu ring.
 * Install LBB damper.
  * Bind LBB damper rings together with slings.
  * Remove vacuum tank lid and ring.
  * Crane rings up to install height, hook LBB magnet ring and support LBB Cu ring by TBD method.
 * Crane suspension into tank.
 * Hook LBB Cu ring.
 * Hook LBB.
 * Crane vacuum tank lid+ring black on.
 * Remove vacuum tank lid (only).
 * Remove port covers where feedthroughs will go, move feedthroughs from assembly frame and install on vacuum tank ring.
 * Reconnect in-air cables.		 ==== 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, Fabian, Enzo, Hirata-san, Yoshioka-kun, Kozu-kun):

  • We solved the problem with the OSEMs: cables had been plugged into the confusingly named "PD current monitor" outputs (actually LED current monitors), not the "OSEM outputs".
  • We solved a problem with the real-time model freezing which turned out to be the IO chassis having lost power.
  • We took some mass off the IM to allow for the weight of the cables, and readjusted it in pitch and roll.
  • We aligned the IRM to the IM and set the OSEMs to mid-range.
  • We added ballast to the BF.
  • We changed the receptacles for the SF-BF rod. The low receptacle did not fit properly into the BF keystone and Hirata-san had to file it.
  • We fixed a broken wire on the BF yaw pico, retested the pico and added the BF cap.
  • We cabled and tested the BF cap picos.
  • We lifted the BF and weighed and balanced it.
  • We installed the SF ring and brought in the SF.
  • We cabled the SF LVDT and did a quick test (not a full calibration).
  • We replaced non-vacuum compatible cables in the PI, removed various sticky labels and wiped it with ethanol.
  • We tried to hook the SF-BF rod but found the hole in the hex cable clamp was too small for the 8 mm rod head. We enlarged the hole but then found the PEEK pieces were too loose. We tried using foil, but then managed to lose a PEEK piece into the BF, so we will need to remove the cap of the BF to get it.

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)