= VIS Meeting on 2016/2/12 =
2015/2/12 13:30 -15:30

Kamioka TV conference room + !SeeVogh

Participants:Takahashi, Mark, Hirata, Fabian, Shoda, Fujii, Aso, Sekiguchi, Akutsu, Okutomi

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

== PR3 ==
 * PR3 Installation Status (Takahashi)
  * Wire breaker groove problem
   * Wrong surface was glued on the mirror side. So no groove is present where the wires touch.
   * Put alminum foil between the prism and the wires
  * Current status (http://klog.icrr.u-tokyo.ac.jp/osl/?r=756)
   * IM and the bottom filter is connected.
   * Adjusting the weight of the IM
  * #Traverser repair: Repair of the broken ones at Mitaka -> Uraguchi-san is working on it.
  * #Screws to fix the front and back rings the RM were too long, or the tapping in the holes were too short. Couldn't use M5x40. Ordered M5x35 with vent holes. -> Delivered. '''Remember to replace them'''
 * The frame for the clean bag is bent.
  * Reinformcement design by Mirapro
   * [[https://www.dropbox.com/s/l8er09c3d7lmsgr/VP5904-A_Bag%20Frame%20Assy.pdf?dl=0|2D Drawing]]
   * [[https://www.dropbox.com/s/j8rcpvytin0qft6/Bag%20Frame.stp?dl=0|STEP]]
   * [[https://www.dropbox.com/s/llu99rjj0gnesz2/Bag%20Assy.png?dl=0|Assembly image]]
   * [[https://www.dropbox.com/s/zsrizfnzx9xuovp/Bag%20Assy.stp?dl=0|Assembly STEP]]
  * Tell Mirapro to go ahead (Aso)
  * Mirapro will come on 22nd to make changes.
 * Crane will be not available on 2/25 for the crane upgrade to remote control. We need to coordinate with Uchiyama-san if we want to do the vacuum installation on 25th.

=== Plan for the next week ===
 * Mon: IM hanging
 * Tue: IMRM hanging
 * Wed: IM alignment
 * Thu: OSEM setup
 * Fri:

== iKAGRA ETM suspension ==
 * Assembly of the suspension (Ohishi)
 * Missing parts (Tatsumi, Takahashi)
  * Insulation tubes for picomotor connectors
   * Tubes were delivered on Wed.
   * Cable ties are not yet delivered -> check the delivery date (Takahashi)
 * Suspension Test (Ohishi)
 * Coil winding (Takahashi)
  * Made 13 coils in total.
  * Need to send 3 bobins to the coil winding company
 * TAMA PRM transportation (Tatsumi) -> done today.

=== Plan for the next week ===
== Travel Plans ==
 * Travel (Week of 2/15)
  * Takahashi:Mon-Thu
  * Shoda:Mon-Thu
  * Mark:
  * Fabian:
  * Okutomi:Mon-Thu
  * Fujii:Mon-Thu
  * Ishizaki:
  * Hirata:
  * Ohishi:
  * Sekiguchi: Mon-Thu

VIS F2F 2/19

KAGRA F2F 2/21 - 23

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

== Other Mechanical Issues ==
 * Rotation angle of the PR3 mirror
  * 0.786deg counter clockwise from the line connecting the centers of the PR3 and BS chambers.
  * 0.619deg counter clockwise with respect to the chamber ([[https://www.dropbox.com/s/073wcbz652i016a/VM5920_KAGRA真空容器PR3_Type-Bp.pdf?dl=0|schematic]])
   * Currently the mirror is rotated by 0.65deg (measured at the time of the test hanging).
   * This is well within the actuation range of the traverser. -> Will not make any further adjustment.
 * #Wire winches
  * Now in the ATC clean room.
  * Asked Ikenue-san to repair it (Takahashi)

 * #Clean work procedure
  * Will be discussed at F2F.

 * #BF Optimal Weight (Takahashi)
  * #Balast masses: Delivered to Mitaka. Will send them to Kamioka (Hirata)
 * #IM wire clamps
  * #Need to send the wire clamps used for the test hanging to I-ject: it was sent to I-ject (Takahashi)
 * #Traverser actuation check (Shoda)

 * #Wire cleaning (Hirata)
  * Hirata will order 20m more wires. -> Delivered. Will wipe in the next week. -> Finished. Will send to Kamioka soon.
  * Will wash Tungsten wire delivery status -> Delivered. Will wipe in the next week ->  Finished. Will send to Kamioka soon.

 * #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

 * 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.
 * Watch dog system (Tanaka)

 * #LVDT distributor connector problem
  * Miyakawa-san circulated a design of the conversion cable (D9-D15): [[attachment:ESB-K003-G004-01A.pdf|drawing]]

 * #Digital System (Okutomi, Fujii)

 * #Cable status (Takahashi)
  * Need to send more PTFE cable to finish the remaining two -> '''Will do it in the next week '''
  * Need to send the cables used for the test hanging once it is finished. -> '''Will send them once the test hanging is disassembled. '''

 * #Cable check
  * Liu-kun Zhao-kun finished checking all the cables. They found another broken cable.

  * Will send the broken cables together with the other cable related items (Takahashi).

== 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: Continue discussion (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)
 * 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
   * 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)
  * Shorter flag is desirable ?
  * Mark will sort out the ideas and organize a specialized meeting.-> will present an updated version in the next meeting.
 * IP base clamp (Fabian): [[attachment:image.png|Picture]] -> Reduce the number of clamps-> Hirata-san finished 2D drawings. Trying to get quotation now.
 * Bread board spring (Takahashi): Hirata-san is getting quotations.
 * #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)

 * #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 ==
 * PRM traverser
  * Postpone the production to the next FY until we know the details of the modification.
  * Tell Uraguchi-san about the above plan (Takahashi) -> done
 * #PR2 Wire breaker problem
  * Prism removal from PR2 (Hirose, Mark)
   * Not yet ready

== Other ==
 * Safety
  * No incident

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

== Next meeting ==
2015/2/19 (Fri) 13:30 - @ Mitaka