Differences between revisions 90 and 162 (spanning 72 versions)
⇤ ← Revision 90 as of 2016-12-02 10:18:30 →
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 * Type B Past Week Summary
  * Mark worked on task lists and schedule.
  * Mark worked on an update of the BS Electronic Items doc ([[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5111|E1505111]]) and started a SRx Electronics Items doc ([[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5886|E1605886]]).
  * Mark did a summary spreadsheet of Takahashi-san's cable orders to see what needed to be ordered immediately (new BS TM OSEM cables; geophone adapters) and later (for SRx).
  * Mark worked on an update of the In-Vacuum Cable doc ([[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=3901|E1503901]]), including information on final lengths that Fabian and Hirata-san had decided when making adapter cables.
  * Mark considered an alternative cabling scheme for the geophones (with a different adapter cable to put the signals and power on different lines and a matching unscrambler) but ended up concluding that the existing design would probably be OK. See [[attachment:00 Revised Geophone-v2.PDF]].
  * Fabian worked on a redesign of the EQ stops for the BS (2 of 4 screws under the RM are opposite large holes and there are no screws to restrain the RM front/back at either top or bottom).
  * Hirata-san worked on PR/SR mirror box modifications with Shoda-san (on-going).
  * Hirata-san partially assembled a bottom filter for use in fit tests of the PRx BF recoil mass.		 === Type B (Mark) ===
==== Past week report ====
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
Line 15: Line 17:
   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 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 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.

Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

Type B (Mark)

Past week report

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 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 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 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.

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