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Size: 1912
Comment:
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Size: 2199
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
| Line 22: | Line 22: |
| * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=5274]] * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=5287]] * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=5292]] |
* [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=5274]] * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=5287]] * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=5292]] |
| Line 26: | Line 26: |
| * Changed titanium screws. * IMMT1 repare was done, with 1cm position accuracy. * 1cm is not enough(Izumi). * IMMT2 repare will be held 7/9~. |
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| Line 27: | Line 32: |
* [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=5295]] |
* [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=5295]] * Offset was implemented. * Whitening will be implemented by daughter board. * Needs gain at low frequency in digital loop. |
Minute of KAGRA commissioning meeting
- Date: 2018/6/19 11AM~12PM
- Attendance: Miyakawa, Aso, Yokozawa, Ohishi, Kokeyama, Miyoki, Tahara, Enomoto, Stefan, Tomura, Ushiyama, Nakano
- eZuce: Ushiba, Izumi, Inoue, Yamamoto(Toyama), Suzuki, Hirose, Shoda
0. Schedule
- k1ix0 will be needed by September for NAB PD.
Laser
- Transmissivity of Faraday Isolator suddenly reduced 60% to 40%.
- Starding Fiber amp failed due to too low power at the sensor.
- We will use spare at Mio labs. We can use current low power laser, so schedule won't be changed so much.
IMMT
- Changed titanium screws.
- IMMT1 repare was done, with 1cm position accuracy.
- 1cm is not enough(Izumi).
- IMMT2 repare will be held 7/9~.
PMC
- Offset was implemented.
- Whitening will be implemented by daughter board.
- Needs gain at low frequency in digital loop.
Useful scripts for RT-models
http://klog.icrr.u-tokyo.ac.jp/osl/?r=5224
- ring on f0 got lower and on the f1 by a few mm.
- f0 TF had no response. Line to coil was cut. It had been repaired before and it was used again.
- It will be fixed around September as 1week work. Whole coil will be replaced.
X arm commissioning/preparation
- WFS target: 10nrad.
Satellite box modification
https://gwdoc.icrr.u-tokyo.ac.jp/DocDB/0083/G1808352/001/G1808352_v1.pdf
- 100nF cap will be implemented to avoid an oscillation. It introduce 41Hz pole.
MC realignment
- MC will be re-aligned today.
FSS BO
- BO card was broken and it was replaced.
- BO check card is still connected between BO card and circuit to break ground loop.
PMC installation, circuits, adding offset
- Trying to implement an offset using slow output into EXC.
Others
- Next meeting: 6/19.