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Size: 1119
Comment:
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← Revision 3 as of 2019-05-14 12:45:10 ⇥
Size: 784
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
| Line 14: | Line 14: |
| * ETMY will be used for mass feed back. * Y arm was locked with IR by frequency feedback. * The frequency fluctuation of IR was too much for the mass lock, so IR frequency should be stabilized by X arm. * X arm and Y arm were aligned and resonate at at time. Beam position at ITMY was too high(1-2cm), and beam position at ITMX was too low(~1cm). |
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| Line 22: | Line 16: |
| * What is the configuration for FPMI? * Locked Fabry-Perot? * Engineering run should not fix the configuration to FPMI. Configuration should be flexible. We assume June run as proposed. |
* ETMY will be used for mass feed back. * ETMY has high power coil driver now. * Matrix diagonalization for ETMY seems to be much smoother than ITMY. Not sure the reason but ITMY seems to have more coupling. |
| Line 29: | Line 24: |
| * Next meeting: 5/14. | * Next meeting: 5/21. |
Minute of KAGRA commissioning meeting
- Date: 2019/5/14 11:00AM~11:40AM
- Attendance: Miyakawa, Yamamoto, Stefan, Nakano, Tomura, Miyo, Stefan, Aso, Kokeyama, Oshino, Inoue
- Zoom: Ushiba, Sawada, Takahashi, Uchiyama
Summary of this week
- Height adsustment: Target is ITMY 6mm upper, ITMX 5mm lower.
- One of the stepping motor did not work. It seems current problem. It will be checked today.
- ITMY adjustment was done. ITMX height changed ~2mm.
Discussion
- ETMY will be used for mass feed back.
- ETMY has high power coil driver now.
- Matrix diagonalization for ETMY seems to be much smoother than ITMY. Not sure the reason but ITMY seems to have more coupling.
Others
- Next meeting: 5/21.