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Size: 2199
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← Revision 6 as of 2018-06-19 11:44:01 ⇥
Size: 1322
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| Deletions are marked like this. | Additions are marked like this. |
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| * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=5224]] | |
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* [[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 == * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=5227]] * Trying to implement an offset using slow output into EXC. |
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| * Next meeting: 6/19. | * Next meeting: 6/26. |
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
Others
- Next meeting: 6/26.