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| Deletions are marked like this. | Additions are marked like this. |
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| * Attendance: Miyakawa, Kokeyama, Aso, Miyoki, Ushiba, Tomaru * eZuce: Suzuki, Uchiyama, Takahaashi, Ohashi, Haino, Shoda, Nakano |
* Attendance: Miyakawa, Yamamoto, Aso * eZuce: Suzuki, Hirose, Yokozawa, Izumi, Ushiba |
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| * 5/28 extension meeting | |
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| == 1. Report of work of the last week and plan of work == | == 1. Discussion after operation == |
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| * Alignment work is mainly done. 3 DOF of alignment is contolled * Typical locking time is ~several hours. Longest was 10 hours or something. * iKAGRA Guardian code was mainly reused and modified. |
* Well done! Duty cycle is 80-90% in 1-5days, and 15-60% in 6-9days. * IMC was quite stable. * ETMY was dominant for stability of IFO in the last 4 days. * Optical gain fluctuated 20~30% due to the contrast defect. * BS coupling between L to P and Y was sometimes dominant for the contrast. * Error of Sunup asymmetry was also dominant by optical gain. |
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| * DAQ * DAC of PR3 was dead. Restarting k1pr3 fixed this problem. We are not sure the cause. * Timing of dc0 sometimes shifted. Restart daqd of k1dc0 fixed this problem. We are not sure the cause. * Diaggui calculates float and sometimes coherence could not be measured. * We switched VIS models to 2kHz to avoid glitches. |
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| == 2. Discussion after the phase 1 including operation == | * Satellite box should be replaced to have more capacitance. |
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| * Well done! * Duty cycle is 80-90% in 1-4days, and 15-60% in 5-9days. * IMC was quite stable. |
== 1. Discussion after phase1 == * == 2. == * |
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| * DAC of PR3 was dead. That was the biggest trouble. |
Minute of KAGRA commissioning meeting
- Date: 2018/5/8 11AM~12PM
- Attendance: Miyakawa, Yamamoto, Aso
- eZuce: Suzuki, Hirose, Yokozawa, Izumi, Ushiba
- 5/28 extension meeting
1. Discussion after operation
- IFO, ETMs: *Izumi, Enomono
- Well done! Duty cycle is 80-90% in 1-5days, and 15-60% in 6-9days.
- IMC was quite stable.
- ETMY was dominant for stability of IFO in the last 4 days.
- Optical gain fluctuated 20~30% due to the contrast defect.
- BS coupling between L to P and Y was sometimes dominant for the contrast.
- Error of Sunup asymmetry was also dominant by optical gain.
- DAQ
- DAC of PR3 was dead. Restarting k1pr3 fixed this problem. We are not sure the cause.
- Timing of dc0 sometimes shifted. Restart daqd of k1dc0 fixed this problem. We are not sure the cause.
- Diaggui calculates float and sometimes coherence could not be measured.
- We switched VIS models to 2kHz to avoid glitches.
- Satellite box should be replaced to have more capacitance.
1. Discussion after phase1
2.
- Troubles:
- ETMY
- ETMX
- IFO
- CAL
- DAQ
- VAC
- CRY
3. Phase 2
- Each stage and target
3. Tasks or discussions
- 5/28 extend chief meeting for looking back phase 1.
Others
- Baffle at ETMX will extracted in the week of 5/7, and it will be black coated.
- Next meeting: 5/8.
1. Discussion after the phase 1 including operation
- IFO
- LSC, CAL etc.
- damping
- DAQ
- Cryogenic
- Vacuum