Differences between revisions 43 and 408 (spanning 365 versions)
⇤ ← Revision 43 as of 2016-07-27 11:08:35 →
Size: 3207
Editor: MarkBarton
Comment:
← Revision 408 as of 2019-03-29 12:45:57 → ⇥
Size: 2199
Editor: MarkBarton
Comment:
Deletions are marked like this. Additions are marked like this.
Line 2: Line 2:
Line 5: Line 4:
 * Type B Past Week Summary
  * Mark and Fabian went to Kashiwa to clean up glue residue on the dummy BS and do a fit/function test of Tatsumi-san's modified tooling.
   * Most of the remaining glue came off with soaking in acetone, but there is still some in the machining grooves in the Al surface. Probably more work is required.
   * A set of cleanroom shoes borrowed from the ATC disintegrated when worn (the plastic had perished from age), which put small pieces of foam all over the floor in Hirose-san's cleanroom and required a lot of clean-up with a sticky roller! Cleanroom suits and shoes for use by Type B team at Mitaka/Kashiwa have been ordered, but will take another week to arrive.
   * The flag holding parts are now much easier to place and remove, much reducing the risk of breaking flags after gluing.
   * The sapphire and metal prisms from both the first BS gluing and the PR3 hanging test mirror were brought back to Mitaka for ultrasonic cleaning to remove glue, so they can be reused.
  * Hirata-san found the SR versions of the screws for immobilizing the IM and IRM. These fit much better than the BS ones (despite being the same design) and will be used for the BS.
 * Type B ongoing issues
  * OSEMs
   * Akutsu-san is working to get wide-mouth OSEMs ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=1853|2 assembled]]; first 4 expected to be assembled and washed by 8/8)
  * Longer cables for BF->PI and SF->PI.
   * Connectors RECEIVED, cables being made.
  * SR machining test ongoing.
  * Lower breadboard stuff
   * Installation to be incorporated into the procedure document. Mark/Takahashi to discuss.
   * Breadboard springs (in manufacture, expected end of July)
  * Documents
   * 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]]
 * To-do list during Mark's vacation
  * Weigh IM/RM/IRM (Fabian, Hirata) - DONE but anomalies found.
  * Pack/ship IM/RM/IRM to Kamioka (Hirata/Fabian).
  * Analyze geophone data (Fabian/Shoda) - data taken by Shoda-san; Fabian to find calibration factors.
  * Remove glue from dummy BS face (Fabian) - partly done.
  * Reglue flags and prisms (Tatsumi, Fabian)
  * Clean wire for BS and RM (Hirata) - DONE
  * Get new winch parts for new wire diameters - design received from Ikenoue-san
  * Do fit/function test of winches (Fabian/Hirata)
  * Ship winches to Kamioka (Hirata/Fabian)
  * Work on BS simulation (Fabian)
  * Do Inventor assembly for SR2 in chamber and on assembly frame (Hirata) - ONGOING.
  * Write more of payload assembly procedure (Fabian)
  * Write more of main assembly procedure (Mark)
 * Longer term to-do list
  * 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)
  * Check SR RM machining test progress (Hirata)		 === Type B (Mark) ===
==== Report for the week of 3/25 ====
 * Mark and Fabian helped Fujii-kun with PR2. The problem turned out to be two broken flags. Hirata-san drew up a design for a jig to help reglue the flags in situ.
 * Fabian documented the height budget for the Type B suspension in the wiki ([[KAGRA/Subgroups/VIS/OpsManual/TypeB/SR3Data]] etc).
 * Terrence wrote up the final version of his OL diagonalization scheme.
 * Terrence worked on L2P decoupling for the TM.
 * Terrence and Mark edited the Type B Guardian to turn on the payload damping later in the sequence, after IP and GAS, to help ensure that the OSEMs are not touching by the time they're needed (which can happen if the BF is buoyancy compensated for vacuum but the suspension is vented).
 * Mark started on a big tidy-up of the cleanbooth.
 * Mark asked LIGO colleagues about use-by dates for EP30-2. Masterbond says it's good for 6 months in cartridge form and 12 months in jar form (although presumably only if the jars are not opened). If it's too old it may remain tacky after curing. The batch that Type B has was manufactured 2017-11-02 and KEK has a batch from early 2018.

==== Plan for week of 3/25 ====
 * Mark, Fabian at Kamioka Mon-Fri.
 * Assist with PR2.
 * Work on Type B paper.
 * Modify RT models and/or Guardian to revert to the SAFE state under control in all but the most extreme emergency situations (rather than suddenly shutting off all output).
 * Tidy up.
  * Gather and clean tools.
  * Gather and organize unused parts and fasteners.
  * Return all unused cables to tent.
  * Tidy up cables in rear of SR2 rack.

==== Vacation/Travel Info ====
 * Enzo's last day 3/29.
 * Terrence's last day for now, 3/29.
 * Mark compensation day for 3/21: 3/29. (He is not really typing these minutes, and anyone who sounds like him in the meeting is an impostor!)
 * Type B going-away party for Terrence/Enzo, 3/29 in Tokyo.
 * Terrence's next visit from 4/18.
 * Fabian's vacation 4/26 to 5/10.
 * Mark's vacation from about 5/22 to 6/11 (TBD).
 * Mark's final day 6/28.

Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

Type B (Mark)

Report for the week of 3/25

  • Mark and Fabian helped Fujii-kun with PR2. The problem turned out to be two broken flags. Hirata-san drew up a design for a jig to help reglue the flags in situ.

  • Fabian documented the height budget for the Type B suspension in the wiki (KAGRA/Subgroups/VIS/OpsManual/TypeB/SR3Data etc).

  • Terrence wrote up the final version of his OL diagonalization scheme.
  • Terrence worked on L2P decoupling for the TM.
  • Terrence and Mark edited the Type B Guardian to turn on the payload damping later in the sequence, after IP and GAS, to help ensure that the OSEMs are not touching by the time they're needed (which can happen if the BF is buoyancy compensated for vacuum but the suspension is vented).
  • Mark started on a big tidy-up of the cleanbooth.
  • Mark asked LIGO colleagues about use-by dates for EP30-2. Masterbond says it's good for 6 months in cartridge form and 12 months in jar form (although presumably only if the jars are not opened). If it's too old it may remain tacky after curing. The batch that Type B has was manufactured 2017-11-02 and KEK has a batch from early 2018.

Plan for week of 3/25

  • Mark, Fabian at Kamioka Mon-Fri.
  • Assist with PR2.
  • Work on Type B paper.
  • Modify RT models and/or Guardian to revert to the SAFE state under control in all but the most extreme emergency situations (rather than suddenly shutting off all output).
  • Tidy up.
    • Gather and clean tools.
    • Gather and organize unused parts and fasteners.
    • Return all unused cables to tent.
    • Tidy up cables in rear of SR2 rack.

Vacation/Travel Info

  • Enzo's last day 3/29.
  • Terrence's last day for now, 3/29.
  • Mark compensation day for 3/21: 3/29. (He is not really typing these minutes, and anyone who sounds like him in the meeting is an impostor!)
  • Type B going-away party for Terrence/Enzo, 3/29 in Tokyo.
  • Terrence's next visit from 4/18.
  • Fabian's vacation 4/26 to 5/10.
  • Mark's vacation from about 5/22 to 6/11 (TBD).
  • Mark's final day 6/28.

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