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

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

Zoom Meeting

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

Progress report

Schedule Chart

Type-A : (PDF/MPP)

Type-B: (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(klog21)

• Eleonora and Midooka-kun worked on the diagonalization of BS IM. (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.)
• --
• 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

• 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. (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)