Diff for "KAGRA/Recovery2024/IYC"

Differences between revisions 9 and 13 (spanning 4 versions)

IYC Recovery(20240407)

Suspension health check (Takahashi, Ushiba)
- A01: Cable check
  - 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
- A02 Porality Check
  - Magnet gluing
  - https://klog.icrr.u-tokyo.ac.jp/osl/?r=28831
- A03 Rubbing Check
  - judge by the transfer functions
- A04: Range and Calibration
- A05: Watchdog Setting: Skip
- A06: Height Measurement
  - https://klog.icrr.u-tokyo.ac.jp/osl/?r=29064
- 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
  - EQ stop: https://klog.icrr.u-tokyo.ac.jp/osl/?r=29087
    - F0 is close to edge, so gain is high. -> accept
    - F1 is within the range enough, we have no explanation why gain is so high. The reason of dip of 8Hz depends on coupling, earthquake might change the coupling. -> accept???
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
- https://klog.icrr.u-tokyo.ac.jp/osl/?r=29128
Tcam (Yokozawa and ChenDan, and Yamamoto)
Baffle PDs (Yokozawa and his selected persons):
NAB, WAB (Akutsu)
- NAB: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28998
- WAB: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28984
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.

-  ⇤ ← Revision 9 as of 2024-04-12 15:27:28 → 
  Size: 1918
  Editor: OsamuMiyakawa
  Comment:
+   ← Revision 13 as of 2024-04-12 15:43:43 → ⇥
  Size: 2284
  Editor: OsamuMiyakawa
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 22:
-   * 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.
+   * 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 26:
+Line 28:
+    * F0 is close to edge, so gain is high. -> accept
    * F1 is within the range enough, we have no explanation why gain is so high. The reason of dip of 8Hz depends on coupling, earthquake might change the coupling. -> accept???