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Size: 1292
Comment:
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Size: 2406
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
| Line 6: | Line 6: |
| * | * Re-cabling of BF damper * https://klog.icrr.u-tokyo.ac.jp/osl/?r=28993 * https://klog.icrr.u-tokyo.ac.jp/osl/?r=29177 |
| Line 8: | Line 10: |
| * | * Magnet gluing * https://klog.icrr.u-tokyo.ac.jp/osl/?r=28831 |
| Line 10: | Line 13: |
| * | * judge by the transfer functions |
| Line 15: | Line 18: |
| * | * https://klog.icrr.u-tokyo.ac.jp/osl/?r=29064 |
| Line 18: | Line 21: |
| * | * ITMY IM/MN photosensors: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29140 * ITMY tower sensor: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29141 * Moving peaks exist, but amplitudes are not so high and frequency is far from controls. -> accept * 2nd and 3rd graph shows it can be removed when evacuated. -> accept, we should check it after the pump down. |
| Line 20: | Line 26: |
| * | * Transsfer function : https://klog.icrr.u-tokyo.ac.jp/osl/?r=29138 * F0 is close to the edge, so the gain is high. -> accept * F1 is within the range enough, we have no explanation for why the gain is so high. The reason for the dip of 8Hz depends on coupling, the earthquake might change the coupling. 1.6Hz peak showed in the new data, but we do not know why. However, no control is applied, so -> accept * EQ stop: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29087 |
| Line 22: | Line 32: |
| * | * path check: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29098 |
| Line 27: | Line 37: |
| * | * https://klog.icrr.u-tokyo.ac.jp/osl/?r=29128 |
| Line 36: | Line 46: |
| * | * NAB: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28998 * WAB: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28984 |
| Line 39: | Line 50: |
| * tie rod adjustment between EXC and TMSX to avoid stress when the only EXC side is pumped down. | |
| Line 43: | Line 53: |
| * The broken cc-10 was replaced. * N2 purge is necessary for EXV. |
* N2 purge is necessary for IYV. |
| Line 48: | Line 57: |
| * Connector change is required for the heat link suspensions. |
IYC Recovery(20240407)
- Suspension health check (Takahashi, Ushiba)
- A01: Cable check
- Re-cabling of BF damper
- A02 Porality Check
- Magnet gluing
- A03 Rubbing Check
- judge by the transfer functions
- A04: Range and Calibration
- A05: Watchdog Setting: Skip
- A06: Height Measurement
A08: Calibration:skip
- A09: Spectrum(spectra of IM/MN photosensors.)
ITMY IM/MN photosensors: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29140
ITMY tower sensor: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29141
Moving peaks exist, but amplitudes are not so high and frequency is far from controls. -> accept
2nd and 3rd graph shows it can be removed when evacuated. -> accept, we should check it after the pump down.
- A10: Transfer Function
Transsfer function : https://klog.icrr.u-tokyo.ac.jp/osl/?r=29138
F0 is close to the edge, so the gain is high. -> accept
F1 is within the range enough, we have no explanation for why the gain is so high. The reason for the dip of 8Hz depends on coupling, the earthquake might change the coupling. 1.6Hz peak showed in the new data, but we do not know why. However, no control is applied, so -> accept
- A01: Cable check
- Oplev Check (Yokozawa, Akutsu)
path check: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29098
- Green flash at REFL and Trans PD
- Windows Cleaning
Tcam (Yokozawa and ChenDan, and Yamamoto)
- Baffle PDs (Yokozawa and his selected persons):
- NAB, WAB (Akutsu)
- Vacuum system (Kimura-san / Uchiyama-kun and their selected persons)
- Nasty air parts were replaced.
- Vacuum alert recovery after pumping down.
- GV interlock will be tried after pumping down.
- N2 purge is necessary for IYV.
- Cryo-system (Kimura-san and his selected persons)
- All temp signals are obtained?
- Cryocon alert to slack after cooling.
- No interlock for TMP around the Cryostat.