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ID Date Author Type Category Subject Text   16911   Mon Jun 13 20:26:09 2022 yuta Update ASC Yarm ASS re-tuning in progress -part 2- [Anchal, Yuta] We are still in the progress of re-commissioning      16914   Tue Jun 14 19:34:06 2022 yuta Update SUS Resonant frequency identification from the free swing test [JC, Anchal, Yuta] We are working on resonant frequency idendification from the free swing test done  7x    16919   Wed Jun 15 15:45:37 2022 yuta Update SUS LO1 LLCOIL now working, it was loose connection We tracked the issue of LO1 LLCOIL not actuating LO1, and found that the DB9 cable from the coil driver to the sat amp was loose.      16920   Wed Jun 15 17:03:17 2022 yuta Update SUS ITMY ULCOIL issue solved, loose connection in sat amp box [Anchal, Yuta] We fixed the issue of ITMY ULCOIL      16922   Thu Jun 16 15:29:03 2022 yuta Update PSL PMC input beam aligned again, IMC [Paco, Tomislav, Yuta] Somehow, when we were trying to measure      16929   Fri Jun 17 16:22:21 2022 yuta Update LSC Actuator calibration of BS. ITMX, ITMY, updated MICH displacement spectra from c1cal Following what we have done in 2013 (40m/8242), actuator calibration was done using MICH.  6x    16932   Tue Jun 21 14:17:50 2022 yuta Configuration BHD BHD DCPDs re-routed to c1sus2 After discussing with Anchal, we decided to route BHD related PD signals directly to ADC of c1sus2, which handles our new suspensions      16935   Tue Jun 21 21:17:16 2022 yuta Update BHD RTS models for BHD added but PCIE error remaining [Anchal, Yuta] RTS models for BHD homodyne phase control (c1hpc)      16940   Wed Jun 22 18:55:31 2022 yuta Update LSC Daily alignment work; POY trouble solved [Koji, Yuta] I found that Yarm cannot be locked      16949   Mon Jun 27 12:32:45 2022 yuta Update IOO WFS issues fixed        16952   Mon Jun 27 18:54:27 2022 yuta Update LSC Modulation depths measurement using Yarm cavity scan [Yehonathan, Yuta] EDITED by YM on 22:11 June 27, 2022 to correct for      16954   Tue Jun 28 14:24:23 2022 yuta Update BHD BHD DC PD signals now also sent to c1lsc to circumvent IPC error [JC, Yuta] To circumvent IPC error sending BHD DC PD signals from c1sus2 to c1lsc, DB9      16968   Fri Jul 1 08:50:48 2022 yuta Summary LSC FPMI with REFL/AS55 trial [Anchal, Paco, Yuta] We tried to lock FPMI with REFL55 and AS55 this week, but no success yet.      16977   Thu Jul 7 18:18:19 2022 yuta Update LSC Actuator calibration of ETMX and ETMX (This is a complete restore of elog 40m/16970 from July 5, 2022 at 14:34)      16978   Thu Jul 7 18:22:12 2022 yuta Update LSC Actuator calibration of MC2 using Yarm (This is also a restore of elog 40m/16971 from Jul 5, 2022 at 17:36)      17002   Thu Jul 14 00:10:08 2022 yuta Summary LSC FPMI with REFL/AS55 trial continued [Paco, Koji, Yuta] We managed to lock MICH using REFL55_Q by setting the demodulation phases and offsets      17014   Mon Jul 18 17:07:12 2022 yuta Update LSC x4.12 added to ETMX coil outputs to balance with ETMY To balance the actuation on ETMX and ETMY, x4.12 was aded to C1:SUS-ETMX_(UL|UR|LR|LL|SD)COIL      17018   Tue Jul 19 16:00:34 2022 yuta Configuration BHD Fast channels for BHD DCPDs now available in c1lsc but not in c1hpc [Paco, Anchal-remote-support, Yuta] We added fast channels to BHD DC PDs.      17020   Tue Jul 19 18:41:42 2022 yuta Update BHD Contrast measurements for Michelson and ITM-LO [Paco, Yuta] We measured contrast of Michelson      17028   Fri Jul 22 17:46:10 2022 yuta Configuration BHD c1sus2 watchdog update and DCPD ERR channels [Tega, Yuta] We have added C1:HPC-DCPD_A_ERR and      17040   Wed Jul 27 18:30:50 2022 yuta Update BHD LO beam power at BHD DCPDs is significantly lower than expected [Paco, Yehonathan, Yuta] We measured power and counts at BHD DCPDs with LO beam only and ITM single      17056   Wed Aug 3 16:00:51 2022 yuta Update BHD BHD fringe aligned with reduced LO and AS beam clipping Last week, we could find an alignment which realizes LO beam and AS beam both unclipped, but it was not consistent with an alignment      17067   Tue Aug 9 15:33:12 2022 yuta Update BHD BHD fringe contrast improved from 43% to 74% [Anchal, Yehonathan, Yuta] We did the constrast measurement with      17069   Tue Aug 9 19:54:31 2022 yuta Summary LSC FPMI locking tonight [Tega, Anchal, Yuta] We resored FPMI locking settings.      17085   Wed Aug 17 07:35:48 2022 yuta Bureaucracy General My wish list for IFO commissioning FPMI related - Better suspension damping HIGH      17201   Thu Oct 20 14:13:42 2022 yuta Summary PSL PMC and IMC sideband frequencies measured I measured the sideband frequencies for PMC and IMC lock (to use it for Mariner PMC and IMC design).      17204   Fri Oct 21 16:15:10 2022 yuta Summary BHD LO phase locking with BH55 audio dither trials [Paco, Yuta] We are still struggling with locking LO phase in MICH or ITM single bounce with      17265   Mon Nov 14 17:45:02 2022 yuta Update BHD BHD DC PD unwhitening and removing cables to c1lsc [Paco, Yuta] We removed splitter to route BHD DC      17270   Tue Nov 15 19:00:56 2022 yuta Summary BHD MICH locked with balanced homodyne readout at some LO phase [Paco, Yuta] MICH was locked with BHD DCPD A-B signal with      17273   Wed Nov 16 15:09:08 2022 yuta Update BHD BHD fringe contrast measured with unwhitening filters BHD fringe visibility was measured again with unwhitening filters on on BHDC_A and B, which removed signal leakage to zero (      17274   Wed Nov 16 18:41:17 2022 yuta Summary BHD Optical gain calibrations for BHD MICH Optical gains of AS55 and BH55 are calibrated for BHD MICH. LO-ITM single bounce:      17279   Thu Nov 17 14:12:58 2022 yuta Summary BHD Optical gain calibrations for BHD MICH with lower UGF [Paco, Yuta] We found that MICH UGF was unexpectedly      17282   Thu Nov 17 20:02:10 2022 yuta Summary BHD MICH optical gain measurements with different LO phases MICH optical gain was measured with different LO phases over ~90 degrees.      17284   Fri Nov 18 13:05:00 2022 yuta Summary BHD Gains adjusted for bandstop filters for BHD optics [Paco, Yuta] We realized that bandstop filters      17285   Fri Nov 18 16:58:39 2022 yuta Summary BHD Actuator calibrations for MICH BHD As there is some confusion in actuator calibration, we have done the measurement again from scratch.  7x    17287   Fri Nov 18 22:46:02 2022 yuta Summary BHD MICH optical gain measurements with different LO phases, with signs MICH optical gain with a sign was measured with different LO phases over ~180 degrees, with      17294   Mon Nov 21 17:44:00 2022 yuta Summary BHD MICH BHD displacement sensitivity with AS55_Q and BHD_DIFF [Paco, Yuta] MICH displacement sensitivity was compared under AS55_Q locking and BHD_DIFF      17296   Mon Nov 21 18:43:46 2022 yuta Update BHD c1hpc and c1lsc modified to send BHD_DIFF and BHD_SUM [Anchal, Yuta] To send BHD signals from c1hpc after      17309   Wed Nov 23 20:58:23 2022 yuta Summary BHD BHD_DIFF sensitivity to BS dither with MICH Offset with different BH55 demodulation phases [Anchal, Paco, Yuta] Attachment #1 is the same plot as       17339   Tue Dec 6 13:09:44 2022 yuta Update BHD c1cal model updates to support sensing matrix for BHD [Anchal, Yuta] We have modified c1cal model to support      17345   Wed Dec 7 16:21:05 2022 yuta Summary BHD Improved MICH BHD alignment [Yehonathan, Yuta] We found that moving AS1 in yaw improves      17347   Thu Dec 8 17:52:39 2022 yuta Summary BHD MICH BHD optical gain measurements at different LO phases, RF+audio dither [Yehonathan, Yuta] Sensing matrix measurements at different LO phases were performed under      17351   Fri Dec 9 13:18:57 2022 yuta Summary BHD MICH BHD optical gain measurements at different LO phases, elliptic fit [Yehonathan, Yuta] Here's a plot using same dataset      17362   Fri Dec 16 18:48:49 2022 yuta Summary General IFO alignment after power loss [Paco, Yuta] We have recovered the IFO alignment      17390   Tue Jan 10 16:06:58 2023 yuta Summary PSL PMC transmission dropped to 0.68 [JC, Paco, Yuta] It seems like PMC transmission (C1:PSL-PMC_PMCTRANSPD) dropped to ~0.68      17392   Wed Jan 11 16:56:57 2023 yuta Summary LSC FPMI BHD recovered, LO phase noise not limiting the sensitivity [Paco, Yuta] We recovered FPMI BHD, and sensitivity  6x    17399   Fri Jan 13 14:20:34 2023 yuta Summary LSC Calibration friendly FPMI BHD [Paco, Yuta] Gains in DARM are corrected to make      17400   Fri Jan 13 18:54:59 2023 yuta Summary LSC Investigations of LO phase locking in FPMI BHD [Paco, Yuta] After several hours of unattended      17401   Tue Jan 17 20:03:19 2023 yuta Summary BHD BH44 installations: IQ demodulator is not orthogonal [Anchal, Paco, JC, Yuta] We have started hardware installations  6x    17405   Thu Jan 19 18:15:48 2023 yuta Summary BHD BH44 RFPD optical path and LO/AS camera [JC, Paco, Anchal, Yuta] - We installed the new BH44 beam path

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