Agenda/Minutes of the VIS Meeting on 2018/6/1
2018/6/1 13:30 -
Participants:
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.
- 2D drawing for SRM is done. Waiting for Hirata-san's check.
- Confirmed the stepping motor actuation on IP stage via medm using BS.
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
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:
- Foreseen risks
- Type-A:
- Type-B:
- Type-Bp:
Discussion
Travel Plans
- Travel (Week of 6/4):
- Takahashi:
- Okutomi:
- Sato:
- Ishizaki:
- Mark:
- Hirata:
- Enzo:
- Shoda:
- Ohishi:
- Fujii:
- Tanioka:
- Tanaka:
- Kozu (ICRR):
- Arai (ICRR):
- Travel (Week of 6/11):
- Takahashi:
- Okutomi:
- Sato:
- Ishizaki:
- Mark:
- Hirata:
- Enzo:
- Shoda:
- Ohishi:
- Fujii:
- Tanioka:
- Tanaka:
- Kozu (ICRR):
- Arai (ICRR):
Next meeting
On 2018/6/8(Fri)