Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

• Type B Past Week Summary
  • Mark did a Type B schedule presentation at the Extended Chiefs Meeting. It was decided to order a second assembly frame so that the BS/SR2/SR3/SRM installations can overlap more.

  • Mark and Hirata-san helped Mirapro construct the assembly frame (photos).

  • Mark and Hirata-san took the jacks and adapter plates off the frame, and cleaned them to remove as much of the original grease as possible. Takahashi-san has offered to re-grease them with vacuum grease.
  • Mark and Hirata-san wiped down the assembly frame and put the clean bag on it.
  • Saito-san, Ohishi-san and several people from Mirapro adjusted the position of the BS chamber.
  • Mark plugged the geophones back into the PR2 rack and checked that the repaired cable was working.
  • Fabian did more pre-assembly of the RM/IM/IRM.
  • Takahashi-san ordered 10 mm diameter x 10 mm long magnets for the IM flags.
  • Mark inspected the SR2 section of the clean booth to see where SR2 assembly could be done. The slot in the ceiling for the crane runs in the ±X direction (at right angles to that for the BS), and there are suitable space on both the +X and the -X sides of the SR2 tank.
  • Hasegawa-san (of Hirose-san's lab) took delivery of the cup for removing the prisms on the dummy BS. It fits well.

  • Tatsumi-san ordered modifications to the BS gluing jig to make it easier to remove the pieces holding the flags after the flags are attached. The parts are expected Fri 7/8. He also ordered more EP30, but this won't arrive until the week of 7/18.

• Type B ongoing issues
  • Wires
    • Need to decide RM wire thickness and order BS and RM wires. Lead time is a few days from Nilaco.
  • 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)
    • Nail-head parts - RECEIVED.
  • Documents

    • BS Assembly Procedure E1504235, E1504235 draft

  • To-do list for Fabian/Hirata-san during Mark's vacation
    • Finish assembly of BS IM, RM and IRM (Fabian).
    • Weigh IM/RM/IRM (Fabian, Hirata)
    • Pack/ship IM/RM/IRM to Kamioka (Hirata/Fabian).
    • Analyze geophone data (Mark, Shoda)
    • Remove glue from dummy BS face (Fabian).
    • Remove prism from dummy BS (Hirose, Fabian?)
    • Reglue flags and prisms (Tatsumi, Fabian)
    • Buy wire for BS and RM (Hirata)
    • Clean wire for BS and RM (Hirata)
    • 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)
    • Apply vacuum grease to jacks for BS assembly frame (Takahashi)
    • 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)