CAL Meeting on 2016/9/28 15:00
Participants: Kanda, Yamamoto, Kokeyama, Suzuki, Tomaru, Inoue, Ushiba, Miyamoto(CRYp), Haino
- Next meeting will be some time in 10/20-11/8
Minutes
- Rick's visit of Kashiwa and Kamioka (Sep./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 ?
- Periscope
- Transmitter module
- We will need a beam shutter in order to avoid exciting high frequency resonance before the Optical follower locks
- Schedule
- Optimization of beam positions
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 - 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
- Suspension transfer function - SUMCOM
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