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ID Date Author Type Category Subject Text   16786   Mon Apr 18 17:53:45 2022 Paco Summary BHD Part IIa of BHR upgrade - POY11 debugging [Paco, Ian] We aligned the X-arm IR laser First fix pointing on the      16788   Tue Apr 19 18:10:10 2022 Paco Update BHD Part V of BHR upgrade - POX11 path, LO path, and ITMX Oplev [Yuta, Paco] We set up POX11 beam path from ITMX chamber to the ITMX in-air table. To      16789   Wed Apr 20 08:20:22 2022 Paco Update BHD Part V of BHR upgrade - PR2 weirdness Yesterday, I tried tuning the PR2 damping gains by increasing the gain until the damping gave the ~5 oscillations (by watching the      16797   Thu Apr 21 16:49:01 2022 Paco Update BHD Part V of BHR upgrade - BS Oplev + LO1 offset [Paco, JC, Yuta] We aligned the BS oplev using the new BSOL mirror pair. The main change is      16821   Sat Apr 30 13:29:33 2022 Paco Update BHD POX Beam issues --- fixed, ASL alignment on vertex chamber [Paco, Anchal, Yuta] We opened the BSC and ITMX chamber in the morning (Friday) to investigate POX11      16844   Tue May 10 18:25:43 2022 Paco Update BHD Green Transmission path [Yuta, Paco] We installed GRX_SM1, GRX_SM2, and finished aligning      16847   Thu May 12 17:20:08 2022 Paco Update Alignment POP Beam on CCD [Paco] Got POP beam centered on camera and nominally on the two PDs. Attachment      16852   Fri May 13 18:42:13 2022 Paco Update Alignment ITMX and ITMY sat amp failures [Yuta, Anchal, Paco] As described briefly by JC, there were multiple failure modes going during      16861   Wed May 18 08:30:29 2022 Paco Update BHD SRM OpLev [Paco] The SRM Oplev injection and detection paths interfere heavily with the POY11. Due      16864   Thu May 19 08:51:40 2022 Paco Update BHD SRM OpLev [Paco, Ian] After agreement from Yuta/Anchal, I moved POYM1 yaw to clear the aforementioned      16868   Fri May 20 20:03:48 2022 Paco Update BHD ITMY chamber work finished - LO and AS overlapped [Paco, Anchal, Yuta] Today, in short we: Recovered alignment of      16869   Mon May 23 13:16:59 2022 Paco Update BHD End of vent - checks [Paco, Yuta] Prep for closing and pump down. Aligned IFO to maximize      16874   Wed May 25 16:56:44 2022 Paco Configuration BHD IFO recovery - IMC alignment [Yuta, Paco] We aligned IMC to recover the IFO progressively. First step was to center the      16881   Fri May 27 17:46:48 2022 Paco Summary Computers CDS upgrade visit, downfall and rise of c1lsc models [Paco, Anchal-remote, Yuta, JC] Sometime around noon today, right after cds upgrade planning tour, c1lsc FE      16885   Wed Jun 1 12:56:44 2022 Paco Summary Electronics STEMlab 125 handout [Paco, Deeksha] Yesterday I handed Deeksha a red pitaya (stemlab 125 - 10) to begin her summer      16887   Fri Jun 3 12:13:58 2022 Paco Configuration CDS Fix RFM channels [Paco, Yuta] We tried fixing the issue of LSC_TRY and LSC_TRX channels not working. We first      16890   Sun Jun 5 19:46:40 2022 Paco Update LSC Fixed IMC Trans sum issue [Paco] Fixed the issue below:      16892   Mon Jun 6 13:35:11 2022 Paco Update LSC First calibrated spectra of MICH at AS55 Q [Paco, Yuta] On the topic of high AS55_Q RFPD offset, it seems it stems from a small residual      16924   Thu Jun 16 18:23:15 2022 Paco Configuration BHD Recovering LO beam in BHD DCPDs [Paco, Yuta] We recovered the LO beam on the BHD port. To do this, we first tried reverting      16945   Fri Jun 24 17:16:59 2022 Paco Update ALS XAUX cable in control room [JC, Paco] We took the long BNC cable that ran from ETMX to ETMY and ran it from ETMX      16956   Tue Jun 28 16:59:35 2022 Paco Summary ALS ALS beat allan deviation (XARM) [Paco] I took ~ 7 minutes of XALS beatnote data with the XAUX laser locked to the XARM      16962   Wed Jun 29 14:28:06 2022 Paco Summary ALS ALS beat allan deviation (XARM) I guess it didn't make sense since f_beat can be arbitrarily moved, but the beat is taken around the PSL freq ~ 281.73      16965   Thu Jun 30 18:06:22 2022 Paco Update ALS Optimum ALS recovery - part I [Paco] In the morning I took some time to align the AUX beams in the XEND table.      16975   Wed Jul 6 19:58:16 2022 Paco Summary NoiseBudget XARM noise budget [Anchal, Paco, Rana] We locked the XARM using POX11      16988   Mon Jul 11 19:29:23 2022 Paco Summary General Finalizing recovery -- timing issues, cds, MC1 [Yuta, Koji, Paco] Restarting CDS We were having      16994   Tue Jul 12 19:46:54 2022 Paco Summary ALS How (not) to take NPRO PZT transfer function [Paco, Deeksha, rana] Quick elog for this evening: Rana disabled MC servo      16997   Wed Jul 13 12:49:25 2022 Paco Summary SUS SUS frozen [Paco, JC, Yuta] This morning, while investigating the source of a burning smell, we turned      17007   Fri Jul 15 19:13:22 2022 Paco Summary LSC FPMI with REFL/AS55 demod phase adjust [Yuta, Paco] We first zero the offsets in ASDC, AS55, REFL55, POX11, and POY11 when      17012   Mon Jul 18 16:39:07 2022 Paco Summary LSC FPMI locking procedure using REFL55 and AS55 [Yuta, Paco] In summary, we locked FPMI using REFL55_I, REFL55_Q, and AS55_Q. The key to      17021   Wed Jul 20 11:58:45 2022 Paco Summary General Jenne laser kaput? [Paco, Yehonathan, JC] We were trying to setup the Jenne laser to characterize the response of three      17022   Wed Jul 20 14:12:07 2022 Paco Summary General Jenne laser kaput! [Koji, Yehonathan, Paco] Koji pointed out that this laser was always driven with a current driver (which      17024   Wed Jul 20 18:07:52 2022 Paco Update BHD BHD MICH test [Paco, Yuta, JC] We did some easy tests on the BHD readout in preparation for BHD MICH. With      17030   Mon Jul 25 09:05:50 2022 Paco Summary General Testing 950nm laser found in trash pile [Paco, Yehonathan] ==== Late elog from Friday ==== Koji provided us with a QFLD-950-3S      17037   Tue Jul 26 20:54:08 2022 Paco Update BHD BHD MICH test - LO phase control [Yuta, Paco] TL;DR Successfully      17102   Wed Aug 24 12:02:24 2022 Paco Update SUS ITMX SUS is sus UL glitches? [Yehonathan, Paco] This morning, while attempting to align the IFO to continue with noise-budgeting,      17104   Thu Aug 25 15:24:06 2022 Paco HowTo Electronics RFSoC 2x2 board -- fandango [Paco, Chris Stoughton, Leo -- remote] This morning Chris came over to the 40m lab to help us get the RFSoC board      17133   Tue Sep 6 17:39:40 2022 Paco Update SUS LO1 LO2 AS1 AS4 damping loop step responses I tuned the local damping gains for LO1, LO2, AS1, and AS4 by looking at step responses in the DOF basis (i.e. POS, PIT, YAW, and      17142   Thu Sep 15 21:12:53 2022 Paco Update BHD LO phase "dc" control Locked the LO phase with a MICH offset=+91. The LO is midfringe (locked using the A-B zero crossing), so it's far from being      17143   Mon Sep 19 17:02:57 2022 Paco Summary General Power Outage 220916 -- restored all Restore lab [Paco, Tega, JC, Yehonathan] We followed the instructions       17145   Tue Sep 20 07:03:04 2022 Paco Summary General Power Outage 220916 -- restored all [JC, Tega, Paco ] I would like to mention that during the Vacuum startup, after the AUX pump was      17150   Wed Sep 21 17:01:59 2022 Paco Update BHD BH55 RFPD installed - part I [Radhika, Paco] Optical path setup We realized the DCPD - B beam path was already      17159   Mon Sep 26 11:39:37 2022 Paco Update BHD BH55 RFPD installed - part II [Paco, Anchal] We followed rana's suggestion for stress relief on the SMA joint in the      17160   Tue Sep 27 10:50:11 2022 Paco Update BHD calibrated LO phase noise Locked LO phase to ITMX single bounce beam at the AS port, using the DCPD (A-B) error point and actuating on LO1 POS. For this      17161   Wed Sep 28 16:37:26 2022 Paco Update BHD calibrated LO phase noise; update [yuta, paco] Update; the high frequency ( > 100 Hz) drop is of course not real and comes      17163   Wed Sep 28 21:54:08 2022 Paco Update BHD calibrated LO phase noise; update Repeated the LO phase noise measurement, this time with the LO - ITMY single bounce, and a couple of fixes Koji      17167   Fri Sep 30 20:18:55 2022 Paco Update BHD LO phase noise with different actuation points [Paco, Koji] We took lo phase noise spectra actuating on the for different optics-- LO1,      17171   Mon Oct 3 15:19:05 2022 Paco Update BHD LO phase noise and control after violin mode filters [Anchal, Paco] We started the day by taking a spectrum of C1:HPC-LO_PHASE_IN1,      17206   Mon Oct 24 18:01:00 2022 Paco Summary BHD BHD actuation measurements [Yuta, Paco] Today we calibrated the actuation on BHD suspended      17209   Tue Oct 25 09:57:34 2022 Paco Configuration PEM Auto Z on trillium interface board I pressed the Auto-Z(ero) button for ~ 3 seconds at ~9:55 local (pacific) time on the trillium interface on 1X5.      17211   Tue Oct 25 14:29:56 2022 Paco Summary SEI Earthquake tripped SUS [Yuta, Paco, JC] This eq  potentially tripped ETMY, PR2,

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