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| * 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? * https://klog.icrr.u-tokyo.ac.jp/osl/?r=28779 * https://klog.icrr.u-tokyo.ac.jp/osl/?r=28839 * https://klog.icrr.u-tokyo.ac.jp/osl/?r=28937 * 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. ---- [[ https://paper.dropbox.com/doc/Installation-Acceptance-Document-for-MCF-and-MCE-in-spring-2021--CLlN4mKPlOUb8YO5qXgdLVeBAg-9a7b8tlqCZ2cxodEcJhGY | 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. |
KAGRA/Recover
X-Pcal Recovery(20240402)
- 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.
- 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
- 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)
- 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 TMS around the Cryostat.
*** Recovery(202404??)
*** Recovery(202404??)
ry2024について、ここに記述してください。