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Agenda/Minutes of the VIS Meeting on 2016/7/15

2016/7/15 13:30 - @ Room 210

Participants: Barton, Tanaka, Pena, Hirata, Ishizaki, Sato, Okutomi, Akutsu, Shoda, Flaminio, Ohishi, Takahashi

Progress report

Schedule Chart (PDF,MPP)

Type-A (Takahashi)

• Minutes of Type-A Meeting

• Simulation (Okutomi)
  • Translation mode is damped by F0 control. Yaw mode is damped by BF control. The mode with node at BF is not damped well.
• Size of LVDT for BF damping will be decided after checking the sample from VIRGO.
• Large amount of torsion drift would be compensated by motor rotation on the top filter.

Type-B (Mark)

• Type B Past Week Summary
  • Fabian took photos of the cleanroom in the ATC to help decide whether it is a good place to assemble PIs for Type A/B.
  • Hirata-san ordered and received wire for the BS and RM (will be cleaned 7/19).
  • Hirata-san received remachined locking parts for the IM (will be cleaned 7/19).
  • Hirata-san ordered additional Misumi parts to be used with the IM locking parts.
  • Fabian and Hirata-san weighed the masses that they've been constructing in the cleanroom and found a 600 g discrepancy from the Inventor (too light) for the IM. Although the density assumed in the Inventor agrees with spec sheet values, it doesn't match the parts. Adjusting the density to match a few key parts reduces the discrepancy to 60 g. More investigation is planned.
  • Hirata-san ordered a medium-capacity scale to weigh the individual parts more precisely and help locate the discrepancy.
  • Hirata-san organized to do a fit/function test of the BS winches and training session with Ikenoue-san of ATC on 7/25. Unfortunately, Ikenoue-san later advised that they clamp parts should be redesigned to allow for the changed wire diameters.
  • Hirose-san and his team successfully removed the misglued prisms from the dummy BS.
  • Fabian travelled to Kashiwa and removed most of the glue from the face of the dummy BS (where the flags had been). There is still some adhesive remaining on both the face and barrel, which will require more work in a second trip.
  • Shoda-san took a suitable segment of geophone noise data for analysis. Fabian will track down the calibration factors.
  • Hirata-san worked on 2D drawings for the PI cable clamps and the magnetic damper for the lower breadboard.
  • Hirata-san worked on the 3D assembly for SR2.
• Type B ongoing issues
  • OSEMs
    • Akutsu-san is working to get wide-mouth OSEMs

  • Longer cables for BF->PI and SF->PI.

    • Connectors RECEIVED, cables being made.
  • SR machining test ongoing.
  • Lower breadboard stuff
    • Installation to be incorporated into the procedure document. Mark/Takahashi to discuss.
    • Breadboard springs (in manufacture, expected end of July)
  • Documents

    • BS Assembly Procedure E1504235, E1504235 draft

• To-do list during Mark's vacation
  • Apply grease to jacks for assembly frame (Takahashi) - DONE
  • Finish assembly of BS IM, RM and IRM (Fabian) - DONE
  • Weigh IM/RM/IRM (Fabian, Hirata) - DONE but anomalies found.
  • Pack/ship IM/RM/IRM to Kamioka (Hirata/Fabian).
  • Analyze geophone data (Fabian/Shoda) - data taken by Shoda-san; Fabian to find calibration factors.
  • Remove glue from dummy BS face (Fabian) - partly done.
  • Remove prism from dummy BS (Hirose, Fabian?) - DONE
  • Reglue flags and prisms (Tatsumi, Fabian)
  • Buy wire for BS and RM (Hirata) - DONE
  • Clean wire for BS and RM (Hirata) - 7/19
  • Do fit/function test of winches (Fabian/Hirata)

    • Clamp parts are not fit the new wire diameter. Hirata will ask Ikenoue-san to make new parts.

  • Ship winches to Kamioka (Hirata/Fabian)
  • Work on BS simulation (Fabian)
  • Do Inventor assembly for SR2 in chamber and on assembly frame (Hirata) - just started.
  • Write more of payload assembly procedure (Fabian)
  • Write more of main assembly procedure (Mark)
• Longer term to-do list
  • Do BS Simulink model (Mark, Kokeyama)
  • Do 2D drawings of SR2 parts (Hirata)
  • Redesign SRx IM wire clamps for larger prisms, remachined RMs.
  • Order SRM/PRM parts (Hirata/Shoda)
  • Order SRx fasteners (Hirata)
  • Check SR RM machining test progress (Hirata)

Type-Bp (Shoda)

• Type-Bp modification 3D drawings
  • Checked the mass
  • Roughly checked the distorsion (in order to check if there is a possibility to increase the weight on the BF)
• F7 LVDT
  • Our design will be fixed with the current Virgo design. We will make some adapters to mount the new design LVDT.
  • Virgo will send us the information of the coil specification (Not yet recieved).
  • Type-A team will decide the design of our LVDTs.

  • Make schedule to product the coils with Type-A team

• Installation related issues
  • Talked with Mirapro. Recieved the first virsion of the assembly frame.
    • Because of the poor accesibility, I asked the update.
• Simulation

  • The information from iKAGRA PR3 is being summarized: JGWdoc

IMMT (Ohishi)

• Made a schedule.
• 3D model
  • Received a quotation. Discussing details.

Watchdog system (Tanaka)

• Prototype boards are ready now.
• Programming the software using the boards.

Safety

• Not any issue

Discussion

• Inertial Sensors for Type-B (Fabian): no progress

Site work plan for the next week

• Mon:
• Tue:
• Wed:
• Thu:
• Fri:

Travel Plans

• Travel (Week of 7/18):
  • Takahashi:
  • Shoda:
  • Mark:
  • Fabian: 19(Kashiwa)
  • Okutomi:
  • Fujii:
  • Ishizaki:
  • Hirata: 19(Kashiwa)
  • Sato:
  • Ohishi:
• Travel (Week of 7/25):
  • Takahashi:
  • Shoda:
  • Mark: 25-29 ?
  • Fabian: 25-29 ?
  • Okutomi:
  • Fujii:
  • Ishizaki:
  • Hirata:
  • Sato:
  • Ohishi:

Mark is away: July 8-20

Visit by ATC on July 20

Next meeting

2016/7/22(Fri) 13:30 -