EXC Recovery(20240404)
- Suspension health check (Takahashi, Ushiba)
- A01: Cable check
https://klog.icrr.u-tokyo.ac.jp/osl/?r=28840 -> please update.
- Other data are expected to be normal.
- A02 Porality Check
- impossible to change. so no problem.
- Cable disconnection happened, but they were recovered.
- Replaced magnets was checked by TF etc.
- A03 Rubbing Check
- A04: Range and Calibration
- The stepper motor range was checked.
- Calibration will be the same.
- A05: Watchdog Setting: Skip
- A06: Height Measurement
- Setpoint change after the height setting. So the height could be changed.
- If we believe LVDT values, we believe the height would not change in the orders of mm.
A08: Calibration:skip
- A09: Spectrum(spectra of IM/MN photosensors.)
- A10: Transfer Function
OK as modeling: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29100, https://klog.icrr.u-tokyo.ac.jp/osl/?r=29106
Phase delay in R -> R, but no such delay in other DoFs. The data in the air tends to have such phase delay in the DoFs. No influence on IFO/Sensitivity.
BF resonance has changed from 0.3 to 0.6Hz. Assuming this changes, the TF can be explained. https://klog.icrr.u-tokyo.ac.jp/osl/?r=28990, https://klog.icrr.u-tokyo.ac.jp/osl/?r=29106
- We need change the filter shape according to these changes. UGF was set around 0.01Hz. So a fine tune is necessary.
- A01: Cable check
- Oplev Check (Yokozawa, Akutsu)
- TM: Easy to find. SI should be cared. Will be don in Monday.
- PF: Easy to find. SI should be cared. Will be don in Monday.
- Green flash at REFL and Trans PD
- REFL: OK
- TMSX: No beam on PD. will be done on Monday. No CCD and PD at present.
- Flash can be seen in Tcam.
- X-Pcal homeworks
The spec loss at PBS can be comparable with the mysterious loss: Loss of power of ~ 4 %: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29081
Cleaning inside was done: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29091
- Windows Cleaning
- Blanck ports:
- check whether bolts have holes or not.
Tcam (Yokozawa and ChenDan, and Yamamoto)
Consistent with CAL data: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28830
- Grenn image can be seen.
- No problems from the Pcal side.
- TMSX optical system (Akutsu and his selected persons)
- TMSX vibration isolation system (Akutsu and his selected persons)
- Baffle PDs (Yokozawa and his selected persons):
- Check on Monday.
- A power supplier is ready?
- NAB, WAB (Akutsu)
- Vacuum system (Kimura-san / Uchiyama-kun and their selected persons)
- tie rod adjustment between EXC and TMSX to avoid stress when the only EXC side is pumped down.
- Replaced flange
- Nasty air parts were replaced.
- Vacuum alert recovery after pumping down.
- GV interlock will be tried after pumping down.
- The broken cc-10 was replaced.
- N2 purge is necessary for EXV.
- Cryo-system (Kimura-san and his selected persons)
- All temp signals are obtained?
- Connector change is required for the heat link suspensions.
- Cryocon alert to slack after cooling.
- No interlock for TMP around the Cryostat.