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