= Agenda/Minutes of the VIS Meeting on 2018/6/1 =

2018/6/1 13:30 - 14:40

[[https://zoom.us/j/203743987|Zoom Meeting]]

Participants: Tanioka, Tanaka, Takahashi, Sato, Aso, Hirata, Mark, Enzo, Arai, Shoda, Fujii, Ishizaki

== 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 ====

[Y-front]
  * Transported the DP parts, the ballast rings, and the hand lifter from X-end.
  * Transported other items (footholds, hoist tool, etc.) from X-front.
  * Opened the top chamber.
  * Assembled the EQ stop for DP. The release sensors and the side stoppers were attached.
  * Assembled the DP itself. Set the DP on the end plate.
  * Extended the EQ stop for the BF stage.
  * Opened the cross tube. Installed the protection net ring.
  * Installed the EQ stop with the DP into the top chamber.
  * Opened the cup of BF. Cabled the LVDT, the stepping motor, the picomotor and the PT100.
  * Pre-assembled the BF dampers.
  * Closed the cup of BF. Attached the primary coils on the cup.
  * Measured the weight of BF.
  * Attached the cone bellows on the bottom of top chamber.
  * Put the SUS sheet on the floor around the cross tube.

==== Plan for coming weeks ====
  * Install the BF. Tune the BF
  * Go to the F3 stage.
  * Replace the blades for the TF in X-front.

=== Type B (Mark) ===
==== Report for week of 5/28 ====
 * Enzo tested the LVDT driver repaired by Tanaka-san - it was fine.
 * Fujii-kun and Enzo finished assembling a batch of 4 geophones and took test data.
 * Hirata-san modified some Promec masses (drilling out the threads on 2 of 4 holes) so we could use two layers of them inside the BF.
 * Hirata-san installed maraging rod receptacles in the LBB damper rings, and in the bottom of PIs #3 and #1 (for the SF damper rings).
 * After consulting with various people, Hirata-san installed the second half of the LBB top ring in the chamber, simply omitting the pillar and screw associated with the badly threaded hole. 
 * Hirata-san took delivery of the screws for the LBB blade units, made up 9 blade units and installed 6 of them on PI #3 and #1 (for SR3 and SR2).
 * Hirata-san made up a set of PI cable clamps and installed them on PI #3 (for SR3).
 * Hirata-san removed the prototype blades from PI #3 to get ready for testing the final blades.
 * We located the #355 disk and #356 poles for the next level of the security structure up to the SF and installed the poles.
 * We installed ballast mass in the BF. After some trial and error we settled on 16 Promec masses (7.1 kg) inside the BF and 5 D1808104-4 and 3 D1808104-5 masses (540 g) on the cap.
 * Enzo and Fujii-kun did several rounds of TFs on the BF/... section of the suspension and debugged a problem with dewhitening filters not being installed in the OSEMINF filter bank.
 * Enzo installed damping filters for the IM OSEMs.

SRM
 * 2D drawing for SRM is done. Waiting for Hirata-san's check.

BS
 * Eleonora, Midooka-kun, and Arai-kun calibrated length sensing oplev([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=5121|klog21]])
 * Eleonora and Midooka-kun worked on the diagonalization of BS IM. ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=5133|klog5133]])
 * Confirmed the stepping motor actuation on IP stage via medm using BS.
 * Maximum coil output during the initial alignment (later half of Dec. 2017) was 30 mA in IMV, 3 mA in IMH, 60 m A in TM.

==== Plan for week of 6/4 ====
 * Mark, Enzo, Hirata-san, Kozu-kun at Kamioka Tue-Fri. (Mon is NAOJ medical checkup.)
 * Terrence Tsang from CUHK joins from Wed 6/8.
 * --
 * Cable and test BF cap picos.
 * Crane in security structure disk at SF level.
 * Crane in SF and remove cap.
 * Hook BF and adjust total ballast.
 * Route cables through SF-BF flying saucer up to bottom of SF.
 * Adjust BF trim mass.
 * Readjust payload.
 * Take TFs.
 * Characterize final F0 blades.

==== Plan for week of 6/11 ====
 * Mark Enzo, Hirata-san, Kozu-kun at Kamioka Tue-Fri (Mon is compensation day for f2f.)
 * --
 * Any unfinished SR3 SF/... stuff.
 * Add budgeted ballast mass to SF and weigh SF/... section.
 * Cable, test SF LVDT and FR.
 * Rebuild F0 #3 for SR3.
 * Park F0 #1 (for SR2) in top of SR3 assembly frame.
 * Move F0 #3 behind SR3.

==== To-Do Lists, Schedule ====
 * [[KAGRA/Subgroups/VIS/TypeB/ToDoBS]]
 * [[KAGRA/Subgroups/VIS/TypeB/ToDoSR]]
 * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7779|JGW-L1807779-v1 Type B Schedule (SR)]]

==== Vacation Info ====

=== Type-Bp (Shoda) ===
==== Past week report ====
 * PR3 optic was released by Miyo-kun and Arai-kun.
 * Izumi-san reported the mirror slipping during the filter tuning. ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=5136|klog5136]])

==== Plan for coming weeks ====
 * Diagonalization of IM/TM stages.

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

=== LVDT Driver (Tanaka) ===
==== Past week report ====
==== Plan for coming weeks ====

=== Other site works ===

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

 * Foreseen risks
  * Type-A: Crane
  * Type-B: Crane, Blade sprins
  * Type-Bp:

== Discussion ==

=== ITMX connection to DGS ===
 * Plan to do it in the week of June 11th
 * Fujii + Enzo (if available)

=== High power coil driver for Type-B ===
 * Necessary current during in-air alignment work
  * IMV：max~10000cnt~3V~30mA
  * IMH：max~1000cnt~0.3V~3mA
  * TM：max~20000cnt~6V~60mA
 * Will consult with AEL (Aso)

=== Composite SRM ===
 * 2D drawings were made
 * Asked Hirata-san to check them
 * If no problem, we will proceed to getting quotes.

=== New VIS members ===
 * Terrence Tsang from the Chinese University of Hong Kong will join us from June 6th
 * Another student from WIMP will arrive later

=== Remote Desktop ===

 * Two workstations also available
   * k1ctr6: 10.68.10.56 
   * k1ctr7: 10.68.10.57

More info: http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/RemoteDesktop

== Travel Plans ==
 * Travel (Week of 6/4): 
  * Takahashi: 5 - 8
  * Okutomi: 
  * Sato: 5 - 8
  * Ishizaki:
  * Mark: 5 - 8
  * Hirata: 5 - 8
  * Enzo: 5 - 8
  * Shoda:
  * Ohishi:
  * Fujii:
  * Tanioka: 5 - 8
  * Tanaka:
  * Kozu (ICRR): 5 - 8
  * Arai (ICRR): 
  * Terrence: 6 - 8


 * Travel (Week of 6/11):
  * Takahashi: 11 - 15
  * Okutomi: 
  * Sato: 12 - 15
  * Ishizaki: 
  * Mark: 12 - 15
  * Hirata: 12 - 15
  * Enzo: 12 - 15
  * Shoda: 
  * Ohishi: 
  * Fujii: 11 - 15
  * Tanioka:
  * Tanaka:
  * Kozu (ICRR): 12 - 15
  * Arai (ICRR):
  * Terrence: 11 - 15 

== Next meeting ==
On 2018/6/8(Fri)