------ 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? * 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. ------ X-Pcal Recovery(20240402) ------ * [[ https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=15709 | 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. --> [[ https://klog.icrr.u-tokyo.ac.jp/osl/?r=29065 | klog#29065 ]] * Pcal-X noise in the Cal line is OK? --> [[https://klog.icrr.u-tokyo.ac.jp/osl/?r=29075 | 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??) ------ ------ *** Recovery(202404??) ------