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== CAL Meeting on 2017/3/21 9:30- ==

CAL Meeting on 2017/1/20 13:00- 14:30

Participants : Inoue, Michiura, Shishido, Tomaru, Ushiba, Yamamoto, Yokozawa, Haino

Minutes

  • Pcal/camera developments (Inoue) slides

    • YI will go to LIGO Hanford to finalize the Pcal design and have a review (end of Feb. ~ beginning of March)
    • Prototype setup of Pcal and camera is made at KEK
    • The detailed schedule was already submitted to SEO and in general approved (a few adjustments needed with other subsystems)
    • 20w fiber LASER was already ordered
    • Transmitter/Receiver modules will be ordered in the next fiscal year
    • To do things by June
      • Camera window, Holes position, Weight scale, Wide-range mirror, In-vacuum stage

  • Measurement of the transfer function of AA/AI filters (Yamamoto,Yokozawa)横澤pdf

    • AA/AI filters are used for all the ADC/DAC so it is important to make sure there is no individual variation
    • A setup has been made in Dec./2016 for the measurement of the transfer function of AA,AI,whitening filters
    • The measurements are on-going by Kamioka staff and data are being analyzed by Yamamoto-san

  • Review of iKAGRA calibration (Michimura) iKAGRACalibrationSummary.pdf

    • iKAGRA calibration was done very quickly so the information (e.g. channel names) was not well shared
    • For bKAGRA calibration, we should have plans in advance to be shared by related groups/people
    • Calibration lines (80, 135 Hz) in iKAGRA were decided with no specific reason, but just to be close to UGF ~100 Hz
    • The actuator efficiency of iKAGRA was measured for the X,Y combined system for DARM instead of each X and Y
      • It was known that there was a delay between X and Y actuation but it was turned out to be small (by Yokozawa-san)
    • The models were taken from CLIO ones; It is needed to make new models for bKAGRA
    • Measurements/modeling of transfer functions for type-A suspension (room temperature part) is expected to be done by VIS (Okutomi-san); but to be confirmed
    • Measurements/modeling of transfer functions for cryopayload will be done by CRY (Miyamoto-san)
  • AOB
    • Yokozawa-san officially joined the Calibration subsystem to work on digital system, hardware injection study, and so on

KAGRA/Subgroups/CAL/Meeting/170120 (last edited 2017-03-21 11:03:38 by SadakazuHaino)