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 * Type B Past Week Summary
  * Mark (with Enzo) did initial TFs on the BF.
   * Did fixed-sine TFs on individual OSEMs at low frequency to check actuator polarity (klog [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=2176 | 2176]] and [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=2182|2182]]).
   * Set gains in the COILOUTF block to compensate for actuator polarity.
  * Mark (with Enzo) did a free-swing measurement on the BS after earthquake of 11/22 (klog [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=2182|2182]]).
   * Results suspicious (noted by Shoda-san): too much difference between OSEMs - horizontal showing much less motion than vertical.
   * Possible rubbing in horizontal.
   * May need a trip to Kamioka.
  * Mark (with Enzo) made corrections and improvements to many of the MEDM screens (klog [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=2176 | 2176]] and [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=2182|2182]]).
   * Main overview screen was not generic in many places, and links to GDS_TP screens were broken.
   * ADC monitor screen referenced bad channels with LIGO-style names.
   * DAC monitor screen was not generic and did not support IM OSEMs.
   * Watchdog IM OSEM AC band limit filter screen was a copy of the TM one.
   * Watchdog TM OSEM AC band limit filter screen appears to be getting OL signals as input - needs model changes to fix.
   * The zoomed screens for IM OSEM centering were called incorrectly and did not work.
   * Various screens had LIGO-style channel names as labels.
  * Mark did a draft of D1603600-v12, including:
   * New assignment of IM OSEMs to DAQ channels (#4-9 are now V1, V2, V3, H1, H2, H3 rather than H1, H2, ...) from last Friday (the wiring was changed to reflect the model so as to remain consistent with PRx).
   * Information on how to identify the wires from the steppers and LVDTs so that the adapter cables can be plugged in properly.
  * Mark worked on schedule.
  * Hirata-san did drawings for new 8-mm maraging wires for Type A.
  * Hirata-san worked on PR/SR mirror box modifications with Shoda-san.
  		 === Type B (Mark) ===
==== Past week report ====
At Kamioka (Mark, Fabian, Enzo, Perry, Hirata-san):
 * We set things up again after the floor coating work.
 * We moved the PI into the second floor of the cleanbooth:
  * We cleared a path for the forklift (moving the portable cleanroom, worktable, power cables, vacuum pumps and other obstacles).
  * We got Saito-sensei to move the PI to the +Y side of the cleanbooth.
  * We washed and cling-wrapped a pallet.
  * We got Miyoki-san to disconnect the cables and curtain blocking the crane slot (and reconnect them afterwards).
  * We added some temporary crossbars in the top of the assembly frame and stored the SF cap on them to get it out of the way.
  * We craned in the pallet and set it up to bridge three floor joists.
  * We craned in the PI using Saito-san's adapter.
   * We couldn't find the original screws for the three PI transport plates so we substituted some others - fortunately there was no galling.
   * We had to connect the adapter to the crane with a sling because the ring for the hook was slightly too small).
 * We did a lot of cabling work:
  * We routed all the BF cables over the BF cap, up through the cable clamp on the SF-BF rod and up to the SF. (We had to redo a few because the Type 3 cable was at the flange end instead of the Type 1.)
  * We connected up the SF LVDT and FR stepper.
  * We started on rebalancing the BF (which had been perturbed by the weight and tension of all the cables). We got it rather better, but it needs more work.
  * We made another batch of anti-feedthrough adapters.

==== Plan for coming weeks ====
For more detail, see [[KAGRA/Subgroups/VIS/TypeB/ToDo]].

Week of 4/10:
 * Hirata-san does scissor lift training 4/10.
 * Perry in Tokyo 4/10.
 * Debug/fix dead OSEM channel, TM-H4.
 * Debug BF/SF LVDTs.
 * Adjust BF pitch/roll.
 * Do TF from SF LVDT actuation.
 * Install temporary ballast mass in SF.
 * Lift SF/BF/... section and check total weight and SF balance.
 * Continue swap of PI LVDT connectors (female->male)
 * Start preparing LBB spring units.
 * Install pico drivers in rack, create MEDM interface (with Miyo-kun), and undo temporary connection of picos to old controller and joystick.
Week of 4/17:
 * Crane in PI.
 * Connect SF/BF... section.
 * Temporarily remove PI and adjust SF ballast if necessary.
 

Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

Type B (Mark)

Past week report

At Kamioka (Mark, Fabian, Enzo, Perry, Hirata-san):

  • We set things up again after the floor coating work.
  • We moved the PI into the second floor of the cleanbooth:
    • We cleared a path for the forklift (moving the portable cleanroom, worktable, power cables, vacuum pumps and other obstacles).
    • We got Saito-sensei to move the PI to the +Y side of the cleanbooth.
    • We washed and cling-wrapped a pallet.
    • We got Miyoki-san to disconnect the cables and curtain blocking the crane slot (and reconnect them afterwards).
    • We added some temporary crossbars in the top of the assembly frame and stored the SF cap on them to get it out of the way.
    • We craned in the pallet and set it up to bridge three floor joists.
    • We craned in the PI using Saito-san's adapter.
      • We couldn't find the original screws for the three PI transport plates so we substituted some others - fortunately there was no galling.
      • We had to connect the adapter to the crane with a sling because the ring for the hook was slightly too small).
  • We did a lot of cabling work:
    • We routed all the BF cables over the BF cap, up through the cable clamp on the SF-BF rod and up to the SF. (We had to redo a few because the Type 3 cable was at the flange end instead of the Type 1.)
    • We connected up the SF LVDT and FR stepper.
    • We started on rebalancing the BF (which had been perturbed by the weight and tension of all the cables). We got it rather better, but it needs more work.
    • We made another batch of anti-feedthrough adapters.

Plan for coming weeks

For more detail, see KAGRA/Subgroups/VIS/TypeB/ToDo.

Week of 4/10:

  • Hirata-san does scissor lift training 4/10.
  • Perry in Tokyo 4/10.
  • Debug/fix dead OSEM channel, TM-H4.
  • Debug BF/SF LVDTs.
  • Adjust BF pitch/roll.
  • Do TF from SF LVDT actuation.
  • Install temporary ballast mass in SF.
  • Lift SF/BF/... section and check total weight and SF balance.

  • Continue swap of PI LVDT connectors (female->male)

  • Start preparing LBB spring units.
  • Install pico drivers in rack, create MEDM interface (with Miyo-kun), and undo temporary connection of picos to old controller and joystick.

Week of 4/17:

  • Crane in PI.
  • Connect SF/BF... section.
  • Temporarily remove PI and adjust SF ballast if necessary.

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