Agenda/Minutes of the VIS Meeting on 2017/8/18

2017/8/18 13:30 -

Participants:

Progress report

Schedule Charts

• Type-A, Bp: PDF,MPP

• Type-B: MPP, PDF

Schedule summary

• Type-A:
• Type-B:
• Type-Bp:

Type-A (Takahashi)

Past week report

[X-end]

16th(Wed)

• Assembled the end plate for F2.
• Prepared for the F2.
• Extended the EQ stop to the F2 stage.
• Put the F2 onto the end plate. The F3 was suspended from the F2.
• Removed a ballast from the F3.

17th(Thu)

• Checked the ACCs.

18th(Fri)

• Closed the F3 cap.

Plan for coming weeks

• Installation of the Filter2 in X-end.

Type B (Mark)

Past week report

At Kamioka (Mark, Ohishi-san, Enzo, Yoshioka-kun, Kozu-kun):

• We removed the LBB damper rings from the tank and passed them to Takahashi-san for recleaning. Unfortunately two screws galled, one holding on a Cu segment, and one holding on a joint piece.
• We removed the LBB blade units from the PI, removed the blades and shipped them off for rework.
• We pulled out all the old in-air cabling.
• We laid about 9 new in-air cables.
• We wrapped/labelled the BS mirror box, the winch system, the trolley adapters, and many other tools that we do not expect to use any time soon.
• We connected up, tested and calibrated the BF LVDT.
• We adjusted the ballast mass on the IM to make it hang level and at the right height. However we had to reduce the weight by a further 686 g relative to the plan of 2017-08-09. We found a combination that was good except for the fact that it used round masses on the bottom corners, so we decided to have the 641 g rectangular masses cut down by 60 g each. Mesco was able to do this within 24 hours. We will reclean the parts on Friday afternoon and swap them in on Monday.

At Mitaka (Hirata-san:

• Hirata-san got a quotation about optical bench from Mirapro and contacted them about reducing cost.
• He asked Suzuki-san (Tokyo university) to order them (delivery date is 10/24, so far).
• He modified SR assembly frame design (from Fabian) and asked Mirapro for quotation.
• He liaised with Koshin-shoko about modification of BS LBB blade springs.
• He asked ATC for making t4.5 ballast mass for PR. He washed them and sent them to Kamioka with the PR thrust bearing.
• He worked on the 3D model of SR3 SUS wires, and making a list for quotation.

Plan for week of 8/21

Vacation: Fabian (Mon)
Internship: Kozu-kun (Mon-Fri)

Kamioka: Mark, Ohishi, Fabian (Tue-Fri), Enzo, Yoshioka-kun (Tue, Wed, Fri).

• Swap in new IM ballast masses; readjust height and levelness.
• Install side panels of IRM and OSEMs.
• Route IRM OSEM cables, test/adjust IRM OSEMs.
• Add BF cap; cable and test BF-1 and BF-2 picos.
• Lift and weigh BF/IRM/IM/RM/BS; adjust ballast mass.
• Crane in SF.
• (Time permitting) Try TFs with optical sensors.

Mitaka: Hirata-san.

• SR stuff.

Plan for week of 8/28

Kamioka: Mark, Ohishi, Fabian, Enzo, Hirata-san, Yoshioka-kun (Tue, Wed, Fri), Kozu-kun.

• Suspend BF/IRM/IM/RM/BS.
• Install SF cap; route cables.
• Lift and weigh SF/BF/IRM/IM/RM/BS.
• Adjust SF ballast.

Vacation Info

Fabian: Fri 8/4 through Mon 8/21 Mark: TBD Mid-Oct

Type-Bp (Shoda)

Past week report

• Hanged RM
  • We inserted the RM around the mirror, and hanged the RM.
  • Since the number of the RM ballast masses is wrong, we asked ATC and MESCO to machine the thinner ballast masses. They were delivered almost at the same time. Now we have 2 spare ballast masses.
  • The EQ stop below the RM was assembled.
• DGS/Circuits preparation
  • DGS people added one more field rack for PRM, but the length of the cables between the AA/AI chassis and the IO chassis was too short to set the AA/AI chassis inside the PRM field rack. We did re-cabling.
• Top plate and Traverser were assembled and placed next to the PR3 chamber. We have silver coated screws to fix the Traverser on the Top plate, but they do not fit well. Waiting for the SDC screws.
• BF bearing was replaced by Mark. Thanks!
• BF LVDT calibration is ongoing.

Plan for coming weeks

• Hang IM/IRM

IMMT (Ohishi)

Past week report

Plan for coming weeks

Watchdog system (Tanaka)

Past week report

Plan for coming weeks

Other site works

• 8/23-24 Draft Chamber Installation
• 8/28 11:30 - 12:30 crane inspection
• End of Aug. to Nov.: Mozumi entrance will be closed

Safety

• Incidents:
• EP-30 safety
• Foreseen risks
  • Type-A:
  • Type-B:
  • Type-Bp:

Discussion

• When to install the middle flange for ETMX

Travel Plans

• Travel (Week of 8/21):
  • Takahashi: 21-25
  • Okutomi: 21-25
  • Sato: 21-25
  • Ishizaki: 21-25
  • Mark: 21-25
  • Fabian: 22-25
  • Hirata:
  • Enzo: 21-25
  • Shoda: 21-25
  • Ohishi:
  • Fujii:
  • Tanaka:
  • Hashimoto(Hosei): 21-25 ?
  • Yoshioka (Toyama): 22,23,25
  • Kozu (ICRR):
  • Arai (ICRR): 21-25
  • Kasuya (TITECH): 21-25
• Travel (Week of 8/28):
  • Takahashi: 28 - 9/1
  • Okutomi: 28 - 9/1
  • Sato: 28 - 9/1
  • Ishizaki: 28 - 9/1
  • Mark: 28 - 9/1
  • Fabian: 28 - 9/1
  • Hirata: 28 - 9/1
  • Enzo: 28 - 9/1
  • Shoda: 28 - 9/1
  • Ohishi:
  • Fujii:
  • Tanaka:
  • Hashimoto(Hosei): 28 - 9/1
  • Arai (ICRR): 28 - 9/1
  • Yoshioka (Toyama): 29,30,9/1
  • Kozu (ICRR): 28 - 9/1

Next meeting

On 2017/8/25(Fri)