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  * Fabian and Hirata-san 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 better screws from Misumi and have additional machining done on them.   * 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.

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

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

Participants:

Progress report

Schedule Chart (PDF,MPP)

Type-A (Takahashi)

Type-B (Mark)

KAGRA/Subgroups/VIS/MeetingNAOJ

  • 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 wiped one set each of wires for the BS and RM (addition 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 was received.
    • 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
  • 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)

  • Put a report here

Watchdog system (Tanaka)

  • Put a report here

Safety

  • Any issue ?

Discussion

  • Inertial Sensors for Type-B (Fabian)
  • Wide OSEM production and test plan (Akutsu, Aso)
    • Steps
      • Test assemble a few (Akutsu)
      • Noise check (Who ?)
        • Change the supply current of a satellite amplifier (find the optimal value for the wide OSEM).
        • Calibration
        • Noise measurements
      • Mass production of wide OSEMs (Akutsu)
        • Calibration and simple noise check
      • Ship to Kamioka
      • Change the supply current of the satellite amplifiers (who ?)
    • Deadline for delivery ?
  • LVDT test

Site work plan for the next week

  • Mon:
  • Tue:
  • Wed:
  • Thu:
  • Fri:

Travel Plans

  • Travel (Week of 7/25):
    • Takahashi:
    • Shoda:
    • Mark: 25-29 ?
    • Fabian: 25-29 ?
    • 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 -

KAGRA/Subgroups/VIS/VISMinutes20160722 (last edited 2016-07-27 14:40:36 by YoichiAso)