= Agenda/Minutes of the VIS Meeting on 2017/11/24 =

2017/11/24 13:30 - 15:00

Participants: Enzo, Shoda, Takahashi, Ohishi, Arai, Sato, Okutomi, Aso, Mark, Hirata, Fabian, Tanaka, Raffaele

== Progress report ==
=== Schedule Chart ===
Type-A  : ([[TBD|PDF]],[[TBD|MPP]])

Type-B: ([[TBD|PDF]],[[TBD|MPP]])

 * Type-A: On schedule for the cable replacement (2 days delay expected in the next week)
 * Type-B: 
 * Type-Bp: 

=== Type-A (Takahashi) ===
==== Past week report ====

[X-end]
  * Recovered from the blackout.
  * Lifted down the EQ stop to release the bottom stopper for BF.
  * Set the F2 stage on the frame lock and cabled between F1 and F2.
  * Suspended the filter chain from the F1, and checked the load for F1.
  * Set the F1 stage on the frame lock and extended the EQ stop.
  * Started the cabling between F0 and F1.
  * Set the top ring onto the frame lock.

==== Plan for coming weeks ====
  * X-end: Installation of the pre-isolaotor and reassembly of the BF damper.
  * Y-end: Connection to the cryo-payload.

=== Type B (Mark) ===
==== Past week report ====

 * Mark worked on SR2 planning.
 * Mark thought through what would be required to swap an optic (e.g., SRM) in situ (JGW-T1707436).
 * Hirata-san tried removing disks from IM flags (so we could reuse them in flag bases and make a complete set for SR2) but only got 1 of 4 out.
 * Hirata-san ordered more disks for IM flags.
 * Hirata-san asked for quotes on SF LBB blades.
 * Hirata-san got a reduced quote for the LBB damper rings.
 * Hirata-san received and cleaned suspension wires for the SR.
 * Fabian worked on the SR mass budget.
 * Fabian worked out the COM of the SR2 optic, and Mark used it to derive the proper prism positions.
 * Enzo and Kozu-kun worked on control filter design and installation.

==== Plan for week of 11/27 ====
 * Fabian at commissioning workshop
 * Hirata-san at Kamioka Tue-Fri to work with Mirapro on SRM LBB installation.
 * All others (Mark, Enzo, Shoda-san, Kozu-kun) at Kamioka to start SR2 assembly.
  * Mark from Mon lunchtime.
  * Kozu-kun from Mon lunchtime through Wed.
  * Mirror gluing.
  * SR2 rack setup.

==== Plan for week of 12/4 ====
 * All at Kamioka
  * IM assembly and pico test.
  * Assembly frame alignment and optical table centering.
  * OL setup.

==== Vacation Info ====
 * Mark 12/22-1/3
 * Enzo TBD, probably 12/22-1/3
 * Fabian 12/22-1/5
 * Hirata-san 12/21-22 (conference)

=== Type-Bp (Shoda) ===
==== Past week report ====
 * Recovered from the power outage
 * PRM tried to be released
  * The suspension hits to the EQ stop. We found that the inner frame was tilted.
  * We inserted the sims below the Traverser top plate.
  * The bellows legs of the tank were not perfectly tightened...??
==== Plan for coming weeks ====
 * PRM release trial again
 * Re-alignment of the main beam

=== OMMT & OSTM (Ohishi) ===
==== Past week report ====
==== Plan for coming weeks ====

=== Watchdog system (Tanaka) ===
==== Past week report ====
 *I want to start ordering mass production version.-->*Waiting. 
                                                     *The execution of the budget was stopped by AEL.
                                                   -->Budget execution was allowed.(Meeting at Kamioka.)

 *Start of order related works.-->Completed(Coop Univ.Tokyo and anther corp.).
 
 *Operation test of the testing tool for mass production equipment.-->Completed.

 *I stay at Toyama on the 19th.And experiment in Kamioka from 20th to 22nd.-->20th I could't experiment by power outage.21th Completed the connection experiment with the digital system.
 22nd The cutoff operation test does not go well.-->
  *DC power supply fault(?).
  *I can't see the driver output and sensor output.

==== Plan for coming weeks ====
 *Plan the operation test again at KAGRA.
 
 *Retest in Mitaka.
 
 *Start ordering mass production version.-->Start preparations.

=== Other site works ===

 * Commissioning Workshop: Nov. 27 to Dec. 1st

=== Safety ===
 * Incidents: Dropped a nut inside the PRM chamber.

 * Foreseen risks
  * Type-A: Crane work
  * Type-B: No heavy work expected
  * Type-Bp: Be careful with the PRM release.

== Discussion ==

=== Brainstorming on how to exchange the payload part without completely disassembling the suspension chain ===

 * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7077|Type-B assembly drawings]]
 *[[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5816|Type-Bp drawings]]

 * Two possible methods
  * Common part: pull out the suspension from the chamber and put it on the assembly frame.
  * Mark's idea: Make smaller winch systems for TM hanging, which can be used with the BF sitting above the IM.
   * How to align the suspension chain with the sliding rails of the assembly frame is a challenge.
  * Shoda-san's idea: Unhook the rod connecting the BF and IM. Then remove the top part (down to BF) and put it temporarily in the chamber.
   * Is unhooking possible ?
   * Alignment of the top part with the payload part when connecting again may be a challenge.
   * IMRM adjustment may be difficult.

 * Conclusion: We should think about the ideas presented today and discuss it again in the next meeting to decide the next action.
 

== Travel Plans ==
 * Travel (Week of 11/27):
  * Takahashi: 27 - 12/1
  * Okutomi: 29 - 12/1
  * Sato: 27 - 12/1
  * Ishizaki: 28 - 12/1 (?)
  * Mark: 27 - 12/1
  * Fabian: 27 - 12/1
  * Hirata: 28 - 12/1
  * Enzo: 27 - 12/1
  * Shoda: 27 - 12/1
  * Ohishi:
  * Fujii:
  * Tanaka:
  * Kozu (ICRR): 27 - 29
  * Arai (ICRR): 27 - 12/1


 * Travel (Week of 12/4):
  * Takahashi: 4 - 8
  * Okutomi: 4 - 8
  * Sato: 4 - 8
  * Ishizaki: 4 - 8
  * Mark: 4 - 8
  * Fabian: 5 - 8
  * Hirata: 4 - 8
  * Enzo: 
  * Shoda: 
  * Ohishi: 
  * Fujii:
  * Tanaka:
  * Kozu (ICRR): ?
  * Arai (ICRR): 

== Next meeting ==
On 2017/12/1(Fri)