= Agenda/Minutes of the VIS Meeting on 2018/2/9 =

2018/2/9 13:30 - 15:00

Participants: Mark, Hirata, Fabian, Izhizaki, Aso, Takahashi, Ohishi, Shoda, Tanaka, Sato, Okutomi, Akutsu

== Progress report ==
=== Schedule Chart ===
Type-A  : ([[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7320|PDF/MPP]])

Type-B: ([[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7779|PDF/MPP]])

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

[X-front]
  * The delivery of the maraging rod was deley. We didn't go to hunging by the short rod.
  * Attached magnets to the primary coils and made interconnect cables.
  * Installed the protection net into the cross tube.
  * Opened the top chamber.
  * Installed the frame lock.
  * Attached the corn bellows onto the bottom of top chamber.
  * Assembling the side stoppers for SFs.
  * The optimal load of BF (190kg) is not acceptable for the cryo-payload. Designing an additional FR.

[X-end]
  * Attached the additional vacuum gauge to the top chamber. The pressure was 0.16Pa.
  * Checked the connection for LVDT on the F0-BF.

[Y-end]
  * The position of IP was corrected so that the torsion mode frequency can be the lowest. 
  * Started the cool down of EYC cryostat on 7th.

[Broken blades]
  * Franco reported about the sample of broken blades. The sample has two different zones.
  * Checked dimensions of some blades. The width was the same, but the thickness was different.
  * Dismounted the blade for SRM from the arc jig.
  * Nikhef can investigate the broken blade too.
  * No information from the maker.
  * Asking the companies about the optimal thickness as material for new blades.
 
==== Plan for coming weeks ====
  * Hung the DP by the short rod.
  * Attached the additional FR and tune the BF again.

=== Type B (Mark) ===
==== Report for week of 2/5 ====
 * Mark made two sets of in-air pico splitter cables (each with a triple for IM and a double for BF) for SR2 and SR3.
 * Fabian, Hirata-san and Kozu-kun worked on cabling and testing the IM pitch/roll/yaw picos, the BF FR and the BF LVDT. The LVDT connections were initially unreliable and Hirata-san had to redo the pins on the coil wires.
 * Fabian installed ballast masses in the BF.
 * Mark worked on schedule.
 * Mark did inventory of the stepper motor drivers (many were not accounted for on the wiki and/or JGWDoc and one is missing) and reserved two for SR3.
 * We emptied out the external cleanroom in preparation for installing SS sheet.

==== Plan for week of 2/13 ====
 * No work Monday (建国記念の日の振替休日)
 * Enzo on vacation
 * Hirata-san at Mitaka Tue (self-evaluation interview).
 * Shoda-san at Mitaka.
 * All others at Kamioka.
 * -
 * Build IRM around IM.
 * Cable/test/adjust IM OSEMs.
 * Do TFs from IM OSEMs to IM OSEMs, OL pitch/yaw.
 * Send OSEM parts back to Mitaka so that Shoda-san can assemble them in Mitaka.

==== Plan for week of 2/19 ====
 * Enzo back from Tuesday.
 * Shoda-san at Mitaka.
 * Hirata-san at Mitaka Mon+Tue (to receive and wash parts).
 * All others at Kamioka.
 * -
 * Lift BF/... section and check total mass and balance.
 * Cable and test BF picos.
 * Add section of SS up to SF ring.
 * Bring in SF.
 * Hook BF/... section.
 * Route cables up to under SF.
 * Check/adjust total mass of BF/... section. 

==== Plan for week of 2/26 ====
 * Shoda-san at Mitaka.
 * -
 * Add Cu segments to SF cap.
 * Lift SF/... section and check total mass and balance.

==== Vacation Info ====
 * Enzo 1/30-2/19.
 * Fabian 4/2-4/27 vacation (then gone). 
=== Type-Bp (Shoda) ===
==== Past week report ====
 * Simon and Arai-kun have set up length Oplev for PRM.
==== Plan for coming weeks ====
 * Arai-kin, Miyo-kun, and Ohishi-san(?) will close the tank of PRM in order to release SF GAS.

=== OMMT & OSTM (Ohishi) ===
==== Past week report ====
 * Ordered 4 custom-made small bellows for vertical vibration isolation.
 * Some drawings of the hanging jig parts were not updated.
   need to reorder some mechanical parts.  
==== Plan for coming weeks ====
 * OSEM test
=== Watchdog system (Tanaka) ===
==== Past week report ====

 *Preparation for assembly of mass products.-->Ongoing.

 *Adjustment and approval to vendors(Implementation adjustments and approvals for circuit boards.)-->Ongoing.
			*The scheduled delivery date is 22th Feb(final).-->Adjusting.

==== Plan for coming weeks ====

 *Preparation for assembly of mass products.

 *Adjustment and approval to vendors(Implementation adjustments and approvals for circuit boards.)

=== Other site works ===
 * Feb 18: Black out of the Mozumi buildings
 * 2/26 - 3/9 Construction of the walls to isolate the arms better (for cleanliness)
 * 3/12 - 3/16 Installation of the control systems for the large GVs

=== Safety ===
 * Incidents: no incident

 * Foreseen risks
  * Type-A: Crane works
  * Type-B: No crane work foreseen
  * Type-Bp: Crane works

== Discussion ==
 * Next FY budget
  * OMMT+OSTM: 14,000KJPY
  * TF(SR, BS, Type-A) replacement blades: 5,000KJPY
  * TF Yaw fishing rod modification: 300KJPY
  * Type-A fishing rod CuBe blades: 100KJPY
  * Mirror disassembly jig for BS: 300KJPY
  * Damper ring for SR: 4,000KJPY  (2 sets)
  * SR ballast masses: 1,500KJPY
  * In-Vacuum Cable Assembly: 400KJPY
  * ETM PI Geophones: 3,000KJPY (6sets including pods)
  * Maraging rods: 2MJPY (For Type-A and B SF Damper rings. 12 rods)
  * Feedthrough: 3MJPY (11 more need to be purchased.)


== Travel Plans ==
 * Travel (Week of 2/12):
  * Takahashi: 13-16
  * Okutomi: 13-16
  * Sato: 13-16
  * Ishizaki: 13-16
  * Mark: 13-16
  * Fabian: 13-16
  * Hirata: 14-16
  * Enzo:
  * Shoda:
  * Ohishi:
  * Fujii:
  * Tanaka:
  * Kozu (ICRR): 13-16
  * Arai (ICRR): 13-16


 * Travel (Week of 2/19):
  * Takahashi: 19 - 23
  * Okutomi: 19 - 23
  * Sato: 19 - 23
  * Ishizaki: 19 - 23
  * Mark: 19 - 23
  * Fabian: 19 - 23
  * Hirata: 21 - 23
  * Enzo: 20 - 23
  * Shoda: 
  * Ohishi: 
  * Fujii:
  * Tanaka:
  * Kozu (ICRR): 19 - 23
  * Arai (ICRR): 

== Next meeting ==
On 2018/2/16(Fri)