= VIS Meeting on 2016/2/19 =
2015/2/19 13:30 -

Room 210

Participants:Takahashi, Hirata, Raffaele, Tanaka, Mark, Fabian, Shoda, Okutomi, Fujii, Aso, Ishizaki, Akutsu

== Schedule ==
 * Schedule status (Aso) ([[https://www.dropbox.com/s/y586flgsr0usmvx/05_VIS-20160212.pdf?dl=0|Chart]])

== PR3 ==
 * PR3 Installation Status (Takahashi)
  * When releasing the IM, one of the flags on the TM was broken (came off).
  * We decided to fix the mirror with respect to the RM. Now the suspension acts as a double-pendulum, damped by the IM.
  * Yaw can be adjusted by the traverser, Pitch can be adjusted by the IM.
  * Transfer functions from IM to IM were measured.
   * Some strange results
   * The vertical resonant frequency is higher than expected
   * Length transfer function has many unknown peaks
 * The frame for the clean bag is bent.
  * Mirapro will come on 22nd to make changes.
 * Pre-installation cleaning of the suspension
  * Vacuum cleaner
  * Wiper-> Ask Hirose-san to send to Kamioka (Aso)
  * Ethanol-> Bring the bottle to the tunnel.
 * Crane will not be available on 2/25 in the morning for the crane upgrade to remote control.

=== Plan for the next week ===
 * Mon: F2F
 * Tue: Re-cabling, LVDT check, fishing rod check, traverser check.
 * Wed: Vacuum installation preparation
 * Thu: Vacuum installation
 * Fri: Post-vacuum installation work

== iKAGRA ETM suspension ==
 * Current status (Ohishi)

== Travel Plans ==
 * Travel (Week of 2/22)
  * Takahashi:Wed - Thu (Fri: Akeno for the acceptance of IP from NIKHEF)
  * Shoda:Tue - Fri
  * Mark:
  * Fabian:
  * Okutomi:Tue - Fri
  * Fujii:Tue - Fri
  * Ishizaki:
  * Hirata:
  * Ohishi:

KAGRA F2F 2/21 - 23

 * Travel (Week of 2/29)
  * Takahashi:
  * Shoda:?
  * Mark:
  * Fabian:
  * Okutomi: ?
  * Fujii:?
  * Ishizaki:
  * Hirata:
  * Ohishi:

== Other Mechanical Issues ==
 * #Production of additional PR winches (Akutsu)
  * Shipping status  (Takahashi, Hirata) -> Wrapped. Will be shipped with IP in the next week.

 * #OSEM assembly status (Akutsu)

 * #List of what should be changed for PR3 hanging
  * People should share ideas whenever they come up with missing thigns.
  * Shoda made a spread sheet for keep tracking the ideas
   * https://docs.google.com/spreadsheets/d/1zZaLObWjDSEOTrr85Hz0ApXxEUChK3xJ_chk0f7r5nY/edit?usp=sharing
   * All the items are now done or being taken care of

 * #Missing items(to be purchased soon)
  * #Traverser motor driver (Shoda)''' ''' -> Will discuss Uraguchi-san. Need a box for stepping motor driver. -> These are for PR2. Will be ordered sometime.

== Electronics ==
 * What are necessary in the next few weeks ?
  * Nothing

 * Watch dog system (Tanaka)
  * Ordered parts to Hokushin

  * About to order PCB to P-ban

 * #Electronics diagram and review
  * Mark: detailed schematics nearly ready to post - [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=3615|D1503615 (full PR3)]], [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4795|D1604795 (iKAGRA PR3)]]
  * Mark: started overview schematic [[attachment:Cabling Overview.graffle.pdf|diagram]],
 * #Need to make Guradian script for PR3. Shoda + Fujii and Okutomi will write one after the mechanical installation is finished.

 * #Digital System (Okutomi, Fujii)

== bKAGRA preparation ==
 * Three big categories of the tasks
  * Type-A: Leader = Takahashi: Task list, team members
  * Type-B (BS and SRC): Leader = Mark: Task list, team members
  * Type-Bp modification: Leader = Shoda (Aso, Raffaele)

== Common Issues ==
== Type-B ==
 * Task list[[KAGRA/Subgroups/VIS/TypeB/TaskList]]
  * Kick off meeting within February (Mark)
 * BS prism preparation (Mark)
  * 5mm prism [[attachment:JGW-D1604796.pdf|drawing]]
  * Confirmed with Hirata-san that BS can use same 5 mm prism as SR (grooves, wire clearance all OK).
  * Confirmed with Tatsumi-san that not a big deal to use smaller BS prism as long as secondary position not changed.
  * Submitted 5 mm prism drawing to company that did LIGO HSTS prism (except grooves), waiting on response.
  * Second company that did LIGO groove cutting not interested in quoting - exploring other US companies.
  * Should contact Shinko-sha again (Takahashi)
   * Asked a quotation to Shinko-sha, gave the new drawing. Will ask about anealing (Takahashi)
   *
 * Can we make SR wire breakers bigger ?
  * Check what happens if we widen the slit by 3.75mm and make a new M5 (Hirata) -> [[https://www.dropbox.com/sh/f5lnexvb6k9bovo/AABEYf4_C19GXYEuJZZiy7cqa?dl=0|Result]]
   * Two concerns
    * The rework may bend the wing shaped parts.
    * The P.C.D. of the new screw holes may not coincide exactly with the other existing holes
   * Consult with Fukushima-san again. Takahashi will contact Fukushima-san
    * 型振り放電加工機 may be better
    * Will test machine the dirty recoil mass. Will have another meeting with Fukushima-san (Takahashi)
   * Do we need to widen the slits for PRC RMs ? -> Depends on how difficult it is to rework the RM.
   * Wider cuts will break the horizontal balance. Need to check how much compensation mass is reduced (Hirata) -> 2mm reduction will be necessary. We can do this.
 * Flag design (Mark)
  * [[attachment:kagraseis01414flagredesign.zip|Mark's drawings]]
  * Make shorter by small changes
  * Widen the OSEM opening (Akutsu)
 * BS dummy optics design (Fabian)
  * http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4811
  * Finalizing the design by the end of next week
 * IP base clamp (Fabian): Reduce the number of clamps-> Hirata-san finished 2D drawings. Trying to get quotation now.-> Still waiting for the quotation.
 * Bread board spring (Takahashi): Hirata-san is getting quotations.Asked quotation with the above one all at once.
 * #BS Assembly Frame Design (Aso, Hirata)
 * #BS gluing jigs (Tatsumi)
 * #Not enough crane height problem (Hirata, Saito)
 * #BS clean bag (Aso)

== Type A ==
 * [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4792|Task list]] (Takahashi)
 * Need to decide members

 * #Type-A Filters Optimal Load Measurements
  * #Takahashi will make a plan for the optimal load check and ask ATC.-> Check two filters per month from April 2016. -> Will be presented to the ATC steering committee.
  * #How to manufacture the long maraging wires ?
   * One prototype was machined by Ojima
   * Aoshima can do the heat treatment for the long rod. Will ask them soon (Takahashi) -> Still waiting for a quotation.
   * How to test it ?
    * We can use the prototype assembly frame in TAMA.

== Type-Bp modification ==
 * PR2 Wire breaker problem
  * Prism removal from PR2 (Hirose, Mark)
   * We need to send the spare mirror and the containers back to Kashiwa soon.
   * Bring out the spare mirror and two containers out from the tunnel on 24th.
   * Need to ask someone for loading help
   * Bring back CLIO suspension too (Takahashi)

== Other ==
 * Safety
  * No incident for VIS
  * Some injuries in other groups

 * #GAS blade inspection by Virgo (Takahashi)
  * Shipped the blades. Will get results in 1-2 months.

== Next meeting ==
2015/2/26 (Fri) 13:30 -

Next F2F 2016/4/1