• KAGRA
• Subgroups
• CAL
• Meeting
• 160928

CAL Meeting on 2016/9/28 15:00 - 16:40

Participants: Kanda, Yamamoto, Kokeyama, Suzuki, Tomaru, Inoue, Ushiba, Miyamoto(CRYp), Haino

• Next meeting will be around 10/20-11/8 (to be determined)

Minutes

• Rick's visit of Kashiwa (8/31-9/15) and Kamioka (9/9-10) - Inoue
  • Visited of X-end
  • Discussed on -
    • Periscope design (EXA chamber)
    • Power standard (Tomaru-san)
    • Camera

    • Elastic deformation (LIGO -> KAGRA)

    • LIGO Pcal+alpha

• Pcal design G1605702 - Inoue

  • Optimization of beam positions
    • To be discussed if we really need two beams
  • Beam monitoring (view camera)
    • Collaboration work with AOS
    • For the first step, independent system with slow (manual) taking
    • How to monitor the mirror edges ? and how to determine absolute position ?

    • GigE camera could also monitor the mirror position ? E1504237

  • Periscope
  • Transmitter module
    • We will need a beam shutter in order to avoid exciting high frequency resonance before the Optical follower locks
  • Schedule

• Power standard G1605704 - Tomaru

  • Inter-institute comparison is not done so often (only every ~10 years) and discrepancy of ~1%
  • Firstly share the same standard between LIGO and KAGRA and then investigate more on the systematics later
  • Discussions from theory/analysis side are needed for the impact and requirement on the absolute amplitude

• Type-A simulation G1605703 - Miyamoto and Inoue

  • Suspension transfer function - SUMCOM
    • Cross-check between Minamoto-San and Okutomi-san
  • Actuator noise budget estimation - MATLAB
  • Time schedule - mid.Oct.
    • For CAL check the transfer function with the control chain

• iKAGRA post-run calibration KAGRA logbook 2016/9/6 - Yamamoto

  • We need to transfer back data from Kashiwa to Kamioka to put in DGS
  • All the necessary transfer functions should be exported from DGS to frame file for the offline calibration
• Up-coming activities
  • Haino : 10/3 - 10/11 visit EGO/Virgo (learn commissioning and Virgo week in 10/10)
  • Haino : Oct.-Nov. visit Annecy to discuss about Virgo Pcal
  • Inoue : 10/21 - 11/10 LHO (Camera and Pcal discussion with Rick)
  • 2017/1/15 - 1/16 : Kajita-san comes to Taiwan for Physical Society meeting
  • 2017/1/15 - 1/22 : Rick comes to Taiwan for Physical Society meeting
    • Calibration meeting in Taiwan-Japan with Rick in this period ?
• AOB
  • In the chief meeting on 10/11, Inoue will briefly mention about Pcal idea
  • CAL meeting will be held every ~1 month with dates to be determined flexibly