Diff for "KAGRA/Recovery2024"

Differences between revisions 2 and 3

KAGRA/Recover

IMC recovery(20240322)

Suspensions(R.Takahashi)
- Mechanical Motion
  - Smooth pico motion and its default position
    - MCi/o: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28907 -> A.I. upload pitch pico pictures (R.Takahashi), or taking picture for pitch pico. -> https://klog.icrr.u-tokyo.ac.jp/osl/?r=28941
    - MCe: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28909 -> A.I. upload pitch, yaw pico pictures (R.Takahashi), or taking picture for pitch, yaw pico. -> https://klog.icrr.u-tokyo.ac.jp/osl/?r=28941
  - Gaps between magnets and coils -> MCo upper is the minimum, but this is the best effort.
  - Gaps between EQ stoppers and mirrors -> confirmed less than 1mm.
    - MCe: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28915
    - MCi/o: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28913
- Electrical wirings
  - Coil resistances and inductances -> A.I. Inductances should refer the past data if the coil did not change, or it will be measured again (Wasimi, 3/24(Monday morning)
    - MCo: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28668 -> A.I. MCo H4 looks high, it could be disconnection. It should be measured again (Wasimi, 3/24(Monday morning).
    - MCi/e: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28696 -> One of the MCi resistances is low, but low may have no problem. If it is high, it may have some disconnection.
  - Isolation of Wiring from coils to flanges(pico and mag-coil) -> MCi could not be accessed.
    - MCo: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28911 -> improved
    - MCe: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28910 -> improved
    - POM: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28914 -> This does not matter for the suspension.
  - Fixing on tables is tight and reliable?
- Smooth Mag-coil motion and balance and TFs
  - balance can be adjusted after closing?
  - MCi: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28938
  - MCo: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28939
  - MCe: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28940 -> A.I. Peak of pitch-shifted to higher frequency from the result of Feb.2. Needs remote centering for the Oplev first (Ushiba).
Mirror conditions(Y.Aso)
- Clean around the center?
  - MCe has a spot near the center. But its influence is expected to be small.
  - Inspection: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28856
Alignment(T.Akutsu, T.Ushiba, T.Yokozawa)
- TEM00 flashing
  - https://klog.icrr.u-tokyo.ac.jp/osl/?r=28912
- The IMC trans beam is the same as before?
- Beam positions on each mirror
  - They should be the same because the IMC trans was recovered in MCio?
  - How about on MCe? MCE tra QPD can be the reference.
- QPD path and centering
- Gaps between magnets and coils again
- IP1/2 dynamic range check for the IMC injection?
- Beam paths for IMC REFL.
Beam dump(T.Akutsu)
- Beam shield reinstallation
  - https://klog.icrr.u-tokyo.ac.jp/osl/?r=28927
  - https://klog.icrr.u-tokyo.ac.jp/osl/?r=28926
- Beam dumps were additionally added?
  - In basic, No. Relocation was done. https://klog.icrr.u-tokyo.ac.jp/osl/?r=28931 -> Inside of beam duct between PSL and iMC looks shining.
Vacuum, etc (N.Kimura, T.Uchiyama, S.Miyoki)
- Cleaning
  - No dust inside, especially on the bottom? -> A.I. before closing.
- Leak point was fastened tightly? -> A.I. when closing.
  - It will be done when the bellows are attached by Mirapro.
- MCE trans flange rotation (the past activity is in https://klog.icrr.u-tokyo.ac.jp/osl/?r=28326) -> it will be done on Mon.
- Lift-up tool check for bellows installation. (past accident https://klog.icrr.u-tokyo.ac.jp/osl/?r=28344)
- Flange surface check to avoid leaking especially on GV_mcf
- FFU stop for the MCE/MCREFL optical table and reconstruction of the window shield (MCE, MCF?). -> measurement of length of legs.

one of templates for IMC closing by Akutsu-kun in 2021.

Summary

TF of MCe had a shift of peak frequency on the pitch. Ushiba-kun will measure it again with the well-centered oplev. It will be reported at the recovery meeting or later.
All others should be OK for closing IMC chambers.
- The resistance of the Coil of MCo H4 looked high. Washimi-kun will measure it again on Monday, but it won't stop closing anyway.
- Washimi-kun will measure inductances again on Monday.
- Check no dust inside, especially on the bottom before closing.
- Check the leak points are fastened tightly when closing.

X-Pcal Recovery(20240402)

Dan's presentation files
- Path2 drift is concerns. However, we expect we can compensate for the drift by using pico-mirrors.
- 5% power loss is concerned. It should be checked on 3~4 April. --> klog#29065
- Pcal-X noise in the Cal line is OK? --> klog#29075

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.
  - https://klog.icrr.u-tokyo.ac.jp/osl/?r=29100
- A03 Rubbing Check
  - ttps://klog.icrr.u-tokyo.ac.jp/osl/?r=29100
- A04: Range and Calibration
  - The stepper motor range was checked.
  - Calibration will be the same.
- A05: Watchdog Setting: Skip
- A06: Height Measurement
  - Done: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28780
  - 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.)
  - OK https://klog.icrr.u-tokyo.ac.jp/osl/?r=29102
  - OK https://klog.icrr.u-tokyo.ac.jp/osl/?r=29107
- 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.
Oplev Check (Yokozawa, Akutsu)
- MN: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28905
- 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
- Done: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28976,
- 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)
Baffle PDs (Yokozawa and his selected persons):
- Check on Monday.
- A power supplier is ready?
NAB, WAB (Akutsu)
- NAB: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28757
- WAB: https://klog.icrr.u-tokyo.ac.jp/osl/?r=28758, https://klog.icrr.u-tokyo.ac.jp/osl/?r=28627
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 TMS around the Cryostat.

*** Recovery(202404??)

ry2024について、ここに記述してください。

-  ⇤ ← Revision 2 as of 2024-04-06 07:33:18 → 
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+   ← Revision 3 as of 2024-04-06 07:33:42 → ⇥
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