= Agenda/Minutes of the VIS Meeting on 2016/6/24 =
2016/6/24 13:30 - 15:00 @ Room 210

Participants:Fabian, Mark, Ohishi, Aso, Sato, Ishizaki, Tanaka, Hirata, Shoda, Raffaele, Akutsu

== Progress report ==
Schedule Chart ([[https://www.dropbox.com/s/jcjn7pladconq3n/VIS%20Overall%20Schedule%2020160617.pdf?dl=0|PDF]],[[https://www.dropbox.com/s/aymck60fpnqgj2x/VIS%20Overall%20Schedule%2020160617.mpp?dl=0|MPP]])

=== Type-A (Takahashi) ===
 * [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/VIS/TypeA|Minutes of Type-A Meeting]]
 * Simulation
  * '''Deadline is the end of June (Okutomi)'''
 * 5 blades for BF -> "The filters in Virgo are different from the GAS filters (no compression). 3 + 2 combination is no problem." (by E. Majorana)

=== Type-B (Mark) ===
 * Type B Past Week Summary
  * Mark and Fabian worked at Kamioka:
   * All the parts for the security structure were located. The clamp pieces for the IM are being taken back to Mitaka to have extra screw holes added.
   * The BS/PR2/SR2 area was cleaned and tidied to allow floor removal and assembly frame construction.
   * 21 "Type 1" cables (PI-Flange, Signal) and 15 "Type 5" cables (OSEM) were tested. They all passed. Sufficient tested "Type 2" cables (PI-Flange, Motor) were located in the PR3 area.
  * Hirata-san worked on the Inventor assembly, adding views (originally defined by Mark) of the different phases of construction.
  * Hirata-san shipped 7 SFs and some parts to Kamioka.
  * Hirata-san made assembly drawings of the damper rings and cable clamps for SR.
  * Hirata-san liaised with Mirapro about the frame assembly.
 * Type B ongoing issues
  * Wires
   * Need to decide RM wire thickness and order BS and RM wires. Lead time is a few days from Nilaco.
  * OSEMs
   * Akutsu-san is working to get wide-mouth OSEMs
  * Longer cables for BF->PI and SF->PI.
   * Takahashi-san has ordered extra connectors (due any day) and will get a company to make the cables.
  * Feedthrough Adapters
   * Need large quantity of male and female D-Sub 9, IDC ribbon connectors - Takahashi-san is getting a quote.
  * Can we make SR wire breakers bigger?
   * Fukushima-san will start on machining test soon (as of 5/27).
  * Installation stuff
   * Crane scale - RECEIVED
  * Ballast masses for payload
   * Initial batch received - ordered extra smaller ones to allow for adjustments.
  * Lower breadboard stuff
   * Installation to be incorporated into the procedure document. Mark/Takahashi to discuss.
   * Breadboard springs (in manufacture, expected end of July)
   * Nail-head parts: quote from Mirapro received, not urgent, will be combined with assembly frame order.
  * 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]]

=== Type-Bp (Shoda) ===
 * Designed the additional masses for the IM [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5301|JGWdoc]](Shoda)
 * Created the 3D model of the vacuum tank with the PR suspensions also for PR2, 3, and M. [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5309|Sectional View of PRs]](Shoda)
 * Checked if the suspension parts clip any beams. Found the POX and POY beams are clipped at the RM. (Shoda)
 * Ckecked also the OpLev beam path inside the chamber except for PR2. Found that we cannot have the OpLev beam spot at the center of the PR3 optic. [[https://granite.phys.s.u-tokyo.ac.jp/svn/LCGT/trunk/VIS/CAD/|SVN]](Shoda)
 * Summarized the information of iKAGRA PR3 measurement. [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5316|Report]](Fujii)
  * Now comparing the simulation and the measurement.

 * Design for the modification of the optical bench suspension points is on going. (Shoda)
  * We need the additional machining at the intermediate stage of the optical bench.
 * Design for the installation jigs for the optical bench is on going. (Shoda)
 * Detailed simulation for the modified Type-Bp is on going. (Fujii)
  * Created the Type-Bp model in both the SUMCON and simulink.
  * Checked the almost all the modes are damped within 1 min.
  * Design for the control filters are on going.

 * I asked Kasuya-san @ Somiya group to join the Type-Bp installation. And she agrees. How far she will be involved is under discussion.

=== IMMT (Ohishi) ===
 * No report

=== Watchdog system (Tanaka) ===
 * I'm working on experiment for stability of PhotoMos Relay.
  . (I will be reported at the next meeting(Maybe..).
 * Above 10Hz, the resistance fluctuation seems small (1e-7 Ohm/rtHz level)
 * In the 20min time scale, the resistance is fluctuating with the amplitude of 0.5mOhm or so.
 * '''We will get more detailed report in the next week'''

=== Safety ===
 * No issue

== Issues ==
 * LVDT for BF damping (Shoda, Raffaele)
  * Will have a meeting with Virgo on 6/27 from 4PM
   * '''Shoda will give an overall presentation '''
    * Show the fit check drawings
   * Discussion about the electronics. '''Ask Virgo people if they can give a short presentation on electronics (Raffaele)'''
  * Available size around the BFs (Shoda, Sato)
   * Type-Bp: 6 of them will fit if we rotate the vertical ones around the wire axis.
   * Type-A: We need to use the openings for the flanges in the cross-tube
  * Length to pitch coupling simulation (Okutomi)
 * Dummy payloads for Type-A (Takahashi, Aso)
  * Dummy payload interferometer: unlikely to happen
  * Need to think about how to test the Type-A performance without Michelson.

== Site work plan for the next week ==
 * Mon:Mark and Fabian for BS preparation, Fujii for accelerometer, Akutsu and Simon for BS length sensing OpLev
 * Tue: Mark and Fabian for BS preparation, Fujii for accelerometer, Akutsu and Simon for BS length sensing OpLev
 * Wed: Mark and Fabian for BS preparation, Fujii for accelerometer
 * Thu: Mark and Fabian for BS preparation.
 * Fri: Mark and Fabian for BS preparation.

== Travel Plans ==
 * Travel (Week of 6/27)
  * Takahashi:
  * Shoda:
  * Mark:27 - 7/1
  * Fabian: 27 - 7/1
  * Okutomi:
  * Fujii: 27-29
  * Ishizaki:
  * Hirata:
  * Ohishi:
  * Sato:
  * Akutsu: 27-28
  * Simon: 27-28

 * Travel (Week of 7/4):
  * Takahashi: 4-7 (extended chief meeting, site check for the installation of Type-A)
  * Shoda: 4 (extended chief meeting)
  * Mark:4-6 (preparation for BS installation)
  * Fabian:
  * Okutomi:
  * Fujii:
  * Ishizaki:5-7 (site check for the installation of Type-A)
  * Hirata:4-6 (preparation for BS installation)
  * Sato: 5-7 (site check for the installation of Type-A)
  * Ohishi:

Mark is away: July 8-20

== Next meeting ==
2016/7/1(Fri) 13:30 -

Next F2F 7/8