= Agenda/Minutes of the VIS Meeting on 2016/9/16 =
2016/9/16 13:30 - @ Room 210

Participants: Mark, Fabian, Hirata, Takahashi, Sato, Ishizaki, Tanaka, Okutomi, Raffaele

== Progress report ==
Schedule Chart ([[https://www.dropbox.com/s/jllfk16zuxy5e8w/VIS%20Overall%20Schedule-20160916.pdf?dl=0|PDF]],[[https://www.dropbox.com/s/kaay9ibfqzs5mb0/VIS%20Overall%20Schedule-20160916.mpp?dl=0|MPP]])

=== Type-A (Takahashi) ===
 * [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/VIS/TypeA/Meeting|Minutes of Type-A Meeting]]
 * EQ stop, release sensor, dummy payload: Open bidding was on 13th. Meet with the company person on 16th.
 * Bottom Filter: Assembly of BFs was started on 7th. Some of bearings washed previously were rusted. -> ordered new parts.-> '''Will buy more to prepare for replacing bearings in the existing BFs. (Takahashi)'''. 
 * BF damper: Specification document will be prepared with the drawings soon. Test of LVDT prototype is on going.
 * Maraging wire: Asking new design around head to ATC. Tensile test is in preparation.
 * Foot hold: Considering the type used in ATC, which is ready made and folded.

==== Type B Past Week Summary ====
 * Type B Past Week Summary
  * Fabian, Mark, Yokogawa-kun and Kuwahara-kun did BS installation at Kamioka:
   * Hung RM.
   * Did permanent routing of RM OSEM cables to IM.
   * Did temporary routing of RM OSEM in-vacuum cables to flange (4 channels).
   * Did semi-permanent routing of all OSEM external cables to satellite amps (10 channels) 
   * Did temporary routing of RM OSEMs to PR2 rack (4 channels). 
   * Took data with geophones connected but immobilized and then stored geophones in boxes.
   * Tested signals from first satellite amp getting to digital system.
   * Weighed mirror box.
   * Did fit check of flag holders for stub flags. Very minor adjustments will be needed.
   * Covered everything in preparation for modifications to clean booth roof (9/20-21).
  * Hirata-san:
   * Finished 3D CAD of SR2 and SR3 in tanks, with optical layout included.
   * Started 3D CAD for SRM.
   * Checked flag design.
   * Assembled a bottom filter (ongoing).
   * Cleaned maraging rods.
 * Type B ongoing issues
 * Longer term to-do list
  * Do Inventor assembly for SRx in chamber and on assembly frame (Hirata) - SR2/SR3 DONE, SRM ongoing.
   * 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-Bp (Shoda) ===
 * Modification Parts
  * Structure Analysis is checked. The purchacing parts can be proceeded, while the method of a part of the analysis is not proper.
  * Wire dimensions for the BFRM is fixed as same as BF/IM maraging rod.
  * Waiting for the quatation with the proper format together with other additional orders.

 * Mirapro
  * Mirapro sent us a report about the optical bench wires. The top wires should be re-designed. Wires for PRs and BS will be ordered together.
  * Preparing for the order.

 * Mirror preparasion
  * 1st wire breakers for PRs is not found even in Kashiwa. They should be ordered together with new flags.
  * Made the rough jigs for removing the current flags from the PR3 and spare mirrors togher with Hirose-san.
   flag detaching will be done in November.

 * F7 LVDT
  * Magnetic coupling noise induced by the magnets on F7 LVDT is calculated with the same way of Shimoda-kun's calculation. (Only in length direction.)
   Current design is well enough for PRs.

=== IMMT (Ohishi) ===
 * Put a report here

=== Watchdog system (Tanaka) ===
 * Conference material.Measures for the inrush current and final design for Power supply part(Regulation type).[[http://gwdoc.icrr.u-tokyo.ac.jp/DocDB/0056/E1605659/001/Project_Power_pert_Re-design_3.pdf|PDF]]

=== Safety ===
 * No issue 

== Discussion ==
 * Maraging and SUS rod issue follow up.
  * Safety margin: No information from Virgo. '''Will ask them again (Takahashi)'''.
  * SUS rod FEA [[https://www.dropbox.com/s/pr4hiwtxm1cy5ik/ESP52195_%E5%86%85%E8%87%93%E7%89%A9%E6%87%B8%E6%9E%B6%E7%94%A8%E3%83%AF%E3%82%A4%E3%83%A4%E3%83%BC%E3%81%AE%E3%83%AF%E3%82%A4%E3%83%A4%E3%83%BC%E5%BE%84%E3%81%AB%E3%81%8A%E3%81%91%E3%82%8B%E6%A4%9C%E8%A8%8E%E5%A0%B1%E5%91%8A%E6%9B%B8.docx?dl=0|report]].
   * We will redesign the top rods for the optical bench suspensions.
   * For PR, Shoda will ask Mirapro to re-design. For BS and SR, Takahashi and Hirata will do the re-design.
   * PR+BS will be ordered with the PR assembly frame. SR rods will be ordered with the SR assembly.
  * Check with Ojima if more than 8mm nail head is possible or not: not yet asked. '''Will ask today (Takahashi)'''

 * Temperature sensors on the suspensions ?
  * Temperature sensor on the Type-A BF may be necessary to monitor the temperature gradient from the cryogenic part.
   * We need to know what precision is necessary -> '''consult with CRY (Takahashi)'''
  * For Type-B and Bp, we may want to put a sensor on the top plate. It is possible to add those sensors after the installation. '''Considering the current work load, we will postpone the preparation until the next year'''.

== Site work plan for the next week ==
 * Mon: 
 * Tue: BS clean booth cross-bar cutting (Aso)
 * Wed: BS clean booth cross-bar cutting (Aso)
 * Thu: 
 * Fri: 

== Travel Plans ==

 * Travel (Week of 9/19):
  * Takahashi: 
  * Shoda: 
  * Mark: 
  * Fabian: 
  * Okutomi: 
  * Fujii:
  * Ishizaki:
  * Hirata:
  * Sato: 
  * Ohishi:

 * Travel (Week of 9/26):
  * Takahashi: 28 -30 (Accelerator check)
  * Shoda:
  * Mark: 26- 30
  * Fabian: 26- 30 
  * Okutomi: 28 -30 (Accelerator check)
  * Fujii:
  * Ishizaki:
  * Hirata:
  * Sato: 28 -30 (Accelerator check)
  * Ohishi:

== Next meeting ==
2016/9/30(Fri) 13:30 -