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Size: 2002
Comment:
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Size: 2602
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
| Line 5: | Line 5: |
| * A01: Cable check | * A01: Cable check -> accept |
| Line 12: | Line 12: |
| * According to Ushiba-kun's picture, they show that all the poraries are correct -> accept | |
| Line 17: | Line 18: |
| * A06: Height Measurement | * A06: Height Measurement -> accept |
| Line 20: | Line 21: |
| * A09: Spectrum(spectra of IM/MN photosensors.) | * A09: Spectrum(spectra of IM/MN photosensors.) -> accept |
| Line 22: | Line 23: |
| * 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. Some bumps or moving peaks exist. 3rd graph shows it can be removed when evacuated. | * 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 25: | Line 28: |
| * 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 |
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| Line 26: | Line 31: |
| Line 28: | Line 34: |
| * Green flash at REFL and Trans PD * |
* Green flash at REFL and Trans PD : https://klog.icrr.u-tokyo.ac.jp/osl/?r=29135 * Flash was seen -> accept |
IYC Recovery(20240407)
- Suspension health check (Takahashi, Ushiba)
A01: Cable check -> accept
- Re-cabling of BF damper
- A02 Porality Check
- Magnet gluing
According to Ushiba-kun's picture, they show that all the poraries are correct -> accept
- A03 Rubbing Check
- judge by the transfer functions
- A04: Range and Calibration
- A05: Watchdog Setting: Skip
A06: Height Measurement -> accept
A08: Calibration:skip
A09: Spectrum(spectra of IM/MN photosensors.) -> accept
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
- Oplev Check (Yokozawa, Akutsu)
path check: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29098
Green flash at REFL and Trans PD : https://klog.icrr.u-tokyo.ac.jp/osl/?r=29135
Flash was seen -> accept
- 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.