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 * Type B Past Week Summary
  * Fabian, Mark, Yokogawa-kun and Kuwahara-kun did BS installation at Kamioka:
   * Calculated BS pitch correction ([[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5630|JGW-T1605630]])
   * Hung dummy optic and set pitch.
   * Prepared RM for hanging (adding OSEMs etc). One OSEM (#24) had wobbly leads and was brought back to Mitaka for rework.
   * Placed vacuum feedthroughs on assembly frame and cleaned initial batch (4) of D-Sub cables.
   * Decided position of BS rack with Miyakawa-san.
   * Measured various maraging rods and the rod holders on the SF.
   * Placed safety rails, rearranged floor panels, cleaned new floor panels, and otherwise improved safety.
  * Hirata-san:
   * Made new 3D models of the maraging rods for PRx and SRx
   * Made new collet design for PRx and SRx (3D and 2D).
   * Made new IM flag design for PRx and SRx (3D and 2D).
   * Washed lots of Type A BF parts and OSEM parts.
   * Cleaned the BS BF-IM maraging rod and organized the rest of the stock of rods.
   * Measured some BF part dimensions.
   * Pre-assembled parts for BFs.
 * Type B ongoing issues
 * Longer term to-do list
  * Do Inventor assembly for SR2 in chamber and on assembly frame (Hirata) - NEARLY DONE.
   * Part "disk security" top has to be modified - screw positions do not match.
  * Write more of payload assembly procedure (Fabian) - ONGOING
  * Write more of BS Assembly Procedure [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4235| E1504235]], [[https://onedrive.live.com/redir?resid=D5CCFA70A378E0D0!195&authkey=!AM_usynuo9QI57g&ithint=folder,webloc|E1504235 draft]] (Mark) - ONGOING
  * Lower breadboard installation to be incorporated into the procedure document.
  * Work on BS simulation (Fabian)
  * Do BS Simulink model (Mark, Kokeyama)
  * Do 2D drawings of SR2 parts (Hirata)
  * Redesign SRx IM wire clamps for larger prisms, remachined RMs
  * Order SRM/PRM parts (Hirata/Shoda)
  * Order SRx fasteners (Hirata)		 === Type B (Mark) ===
==== Past week report ====
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.
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  ==== Plan for coming weeks ====
For more detail, see [[KAGRA/Subgroups/VIS/TypeB/ToDo]].

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.

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, 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.

Plan for coming weeks

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

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.

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