• KAGRA
• Subgroups
• VIS
• VISMinutes20160106

VIS special meeting on iKAGRA ETM and PR2

2016/1/6 14:00 - 15:45

Participants: Fabian, Tatsumi, Suzuki, Raffaele, Shoda, Takahashi, Tomaru, Aso, Mark, Akutsu, Fujii

Agenda Items

• Proposed plans (Aso)

  • Slides

  • Two descoping options are proposed
    • Use TAMA PRM with TAMA suspension as iKAGRA ETMs
    • Use fixed PR2
• TAMA suspension status (Takahashi)
  • There exist 5 TM type suspensions in TAMA
  • Two of them have coils, others not.
  • Two suspensions with coils will be used for the filter cavity experiment
  • We need to make coils and associated parts
  • Some of the suspensions were stored in the air for a long time. We need to clean them first.
  • Tatsumi-san already got a quotation for coil bobins: delivery date 1/25
  • We can use D-sub instead of BNC, so that we can also use in-vac cables prepared for ETMs.

  • One of the TAMA PRMs is used for the filter cavity experiment. If we use this mirror, they need something instead -> LISM mirror (ask Ohashi-san)

Conclusions

• VIS team agrees to the two descoping plans proposed by SEO
• ETM
  • NAOJ will take care of the preparation of the TAMA suspensions back to the original state. The rest of the installation work should be led by other people (e.g. Uchiyama-san). Aso will consult with SEO about this responsibility separation.
  • The following items are identified as the NAOJ tasks for the suspension preparation
    • Check the current status
    • Wash existing parts
    • Order missing parts
    • Coil winding
    • Send parts to Kamioka
    • Assemble the suspensions at Kamioka
  • The task assignment was discussed between Aso and Takahashi. They will contact people to get their agreement. Then the task assignment will be announced soon.
  • The filter cavity experiment needs a replacement mirror for the PRM. Aso will ask Ohashi-san about the LISM mirror.
• PR2
  • The preparation and installation of the fixed mirror will not be done by the VIS people.

  • We need to consider how to effectively use the released man power for the preparation of bKAGRA suspensions -> to be discussed at the regular VIS meeting.

  • We need to secure and cover up the current PR2 assembly set up (Mark, Fabian)