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Size: 1776
Comment:
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Size: 1850
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
| Line 31: | Line 31: |
| * The number of opening flange should be minimized. It must be listed up. |
Minute of KAGRA commissioning meeting
- Date: 2018/7/24 11AM~12PM
- Attendance: Miyakawa, Aso, Enomoto, Yokozawa, Kozakai
- eZuce: Miyoki, Suzuki, Nakano, Shoda, Ushiba, Yamamoto, Kimura, Uchiyama
LAS (Nakano)
- 40W laser started working on last Friday.
- Limite 1W will be used to alignment or so.
- Remote desktop will be installed on Windows PC for 40W laser control.
- Monitor of laser power should be displayed on door or something.
PSL, IOO
- MZ of single arm mode matching is much better now. No Lager-Gaussian is seen.
- MZ contrast is 99.4% and 96.9%. Second one has 3m arm length difference.
- Lock wil be tried soon. Common mode servo will be used to control MZ.
- RAM(residual amplitude monitor) monitor will be installed.
- ISS TF model and measurement were done. Model still does not have phase delay at high frequency.
- RIN is limited by PD dark noise up to 1kHz. Shotnoise is almost comparable.
- UGF is currently 10kHz. Above 1kHz, suppression is not enough. It will be limited to 50kHz max in future by a commercial AOM driver of speed of variable attenuator..
Check list for IXC
- Meeting will be assigned on one of 8/15,16,17.
- WAB, NAB are the additional items.
- Mirror position should be in the item list.
- WAB PD will be installed at the sometime.
- The number of opening flange should be minimized. It must be listed up.
ETMX (Miyamoto)
Geophone
To fix BS GeoPhone, we should open the chamber.
TMS GeoPhone looks fine, but some strange coupling can be seen in the TF measurement.
- Feedback bandwidth is limited ~10Hz.
DGS
- DAC is almost out of stock. We should think to start using old DAC used in CLIO.
rack cleaning
Others
- Next meeting: 7/31.