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• VISMinutes20160722

Agenda/Minutes of the VIS Meeting on 2016/7/22

2016/7/22 13:30 - @ Room 210

Participants:Hirata, Takahashi, Okutomi, Mark, Ishizaki, Tanaka, Sato, Shoda, Fabian, Aso, Ohishi

Progress report

Schedule Chart (PDF,MPP)

Type-A (Takahashi)

• Minutes of Type-A Meeting

• Simulation (Okutomi)
  • Will calculate the requirements for the sensor noise
  • Will calculate the requirements for the actuator coupling and coil driver noise
• Type-A installation procedure review in the second week of August.

Type-B (Mark)

KAGRA/Subgroups/VIS/MeetingNAOJ

• Discussion
  • Next week, Type-B team will stay in Tokyo to finish remaining tasks
• Type B Past Week Summary
  • Hirata-san wiped one set each of wires for the BS and RM (additional sets pending).
  • Hirata-san washed remachined locking parts for the IM and screws for jacks.
  • Hirata-san liaised with Ikenoue-san of ATC to get new winch parts designed for the new wire thicknesses. Ikenoue-san provided updated designs for checking.
  • Hirata-san worked on the Inventor 3D assembly of the SR2.
  • The scale for checking the masses of the IM parts arrived.
  • Fabian and Hirata-san assembled the IRM and identified an issue with the Teflon-coated lock screws between the IM and IRM. The screws were slightly too large, and correcting the size with a die caused large flakes of the black coating to come off. (These screws were ordered before the current screw policy was instituted.) Hirata-san will order SDC-coated screws from Misumi and have additional machining done on them.

  • Fabian tracked down the calibration factors for the geophones and generated a calibrated plot.

• Type B ongoing issues
  • OSEMs

    • Akutsu-san is working to get wide-mouth OSEMs (2 assembled; first 4 expected to be assembled and washed by 8/8)

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

  • 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
  • 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.
  • Reglue flags and prisms (Tatsumi, Fabian)
  • Clean wire for BS and RM (Hirata) - DONE
  • Get new winch parts for new wire diameters - design received from Ikenoue-san
  • Do fit/function test of winches (Fabian/Hirata)
  • Ship winches to Kamioka (Hirata/Fabian)
  • Work on BS simulation (Fabian)
  • Do Inventor assembly for SR2 in chamber and on assembly frame (Hirata) - ONGOING.
  • 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)

• Basic Design Review minute

• Contacted with some companies. (Cost estimate will be done by ATC.)

IMMT (Ohishi)

• In negotiation with a company for CAD modeling

Watchdog system (Tanaka)

• Working on the software

Safety

• No issue

Discussion

• Inertial Sensors for Type-B (Fabian)

  • Fabian's plot https://dl.dropboxusercontent.com/u/99018438/Geophone_Kamioka.png

  • Plot the theoretical noise of geophone
• Wide OSEM production and test plan (Akutsu, Aso)
  • Steps
    • Test assemble a few (Akutsu)
    • Noise check (Type-B team)
      • Change the supply current of a satellite amplifier (find the optimal value for the wide OSEM).
      • Calibration
      • Noise measurements
      • Deadline for the noise check: by the end of September
      • Wide OSEM noise should be checked in Kamioka using the digital system. Type-B team will do it when they come to Kamioka.
      • Akutsu will give Type-B team a wide OSEM and test setup.
    • Mass production of wide OSEMs (Akutsu)
      • Assembly (call for shift)
      • Wash (Hirata ?)
      • Calibration and simple noise check(call for shift)
      • A/I: Akutsu will write an assembly procedure document. Make a call for shift to start the mass production asap.
    • Ship to Kamioka
    • Change the supply current of the satellite amplifiers (talk to AEL: Aso)
• LVDT test
  • Takahashi and Shoda will discuss about this
  • Points to be clarified: purpose of the test (what kind of information we want to obtain to design the new LVDTs ?)
  • Deadline for the new LVDTs: the end of August.

Site work plan for the next week

• Mon:
• Tue:
• Wed:
• Thu:
• Fri:

Travel Plans

• Travel (Week of 7/25):
  • Takahashi:
  • Shoda:
  • Mark: Kashiwa on some day
  • Fabian: Kashiwa on some day
  • Okutomi:
  • Fujii:
  • Ishizaki:
  • Hirata:
  • Sato:
  • Ohishi:
• Travel (Week of 8/1):
  • Takahashi:
  • Shoda:
  • Mark: 1 - 5 ?
  • Fabian: 1 - 5 ?
  • Okutomi:
  • Fujii:
  • Ishizaki:
  • Hirata:
  • Sato:
  • Ohishi:

Next meeting

2016/7/29(Fri) 13:30 -