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ID Date Author Type Category Subject Text   16950   Mon Jun 27 13:25:50 2022 Cici Update General Characterizing the Transfer Loop [Deeksha, Cici] We first took data of a simple low pass filter, and attempted to perform      16951   Mon Jun 27 13:39:40 2022 Deeksha Update Electronics Setting up the MokuLab [Cici, Deeksha] On Friday Cici and I set up the Mokulab to take readings of our loop. The      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      16953   Tue Jun 28 09:03:58 2022 JC Update General Organizing and Cleaning The plan for the tools in 40m As of right now, there are 4 tool      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      16955   Tue Jun 28 16:26:58 2022 Cici Summary General Vector fitting open loop transfer function/Audio cancellation of optical table enclosure [Deeksha, Cici] We attempted to use vectfit to fit our earlier transfer function data, and      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      16957   Tue Jun 28 17:07:47 2022 Anchal Update Calibration Added Beatnote channels in demodulation of c1cal I added today demodulation of C1:LSC-BEATX/Y_FINE_I/Q in the c1cal demodulation where different degrees of freedom can be dithered. For McCal      16958   Tue Jun 28 18:19:09 2022 Tomislav Update Electronics Electronics noise I measured electronics noise of WFSs and QPD (of the WFS/QPD, whitening, ADC...) by closing PSL and measuring the error signal.      16959   Tue Jun 28 18:53:16 2022 rana Summary ALS ALS beat allan deviation (XARM) what's the reasoning behind using df/f_beat instead of df/f_laser ?      16960   Tue Jun 28 22:27:11 2022 Yehonathan Update BHD Measurement of input and output electronics noise {Yuta, Yehonathan} For MICH noise budgeting we measure the input electronics noise which includes      16961   Tue Jun 28 23:10:34 2022 Yehonathan Update BHD Measurement of AS55 demod board conversion factor {Yuta, Yehonathan} We measured the AS55 demod board conversion from the amplitude of a 55MHz      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      16963   Wed Jun 29 18:53:38 2022 rana Update Electronics Electronics noise this is just the CDS error signal, but is not the electronics noise. You have to go into the lab and measure the noise at      16964   Thu Jun 30 17:19:55 2022 Deeksha Summary Electronics Measured Transfer Functions of the Control Loop, Servo (OLTF); got Vectfit working [Cici, Deeksha] We were able to greatly improve the quality of our readings by changing the      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.      16966   Thu Jun 30 19:04:55 2022 rana Summary PSL PSL HEPA: How what when why For the PSL HEPA, we wanted it to remain at full speed during the vent, when anyone is working on the PSL, or when there is a      16967   Thu Jun 30 19:24:24 2022 rana Summary PEM effect of nearby CES construction For the proposed construction in the NW corner of the CES building (near the 40m BS chamber), they did a simulated construction      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.      16969   Fri Jul 1 12:49:52 2022 Koji Update IOO MC2 seemed misaligned / fixed I found the IMC was largely misaligned and was not locking. The WFS feedback signals were saturated and MC2 was still largely      16970   Tue Jul 5 14:34:39 2022 yuta Update LSC Actuator calibration of ETMX and ETMY ETMX and ETMY actuators were calibrated using single arm lock by taking the actuation efficiency ratio between ITMs. Below is the      16971   Tue Jul 5 17:36:03 2022 yuta Update LSC Actuator calibration of MC2 using Yarm MC2 actuator calibration was also done using Yarm in the same way as we did in 40m/16970.      16972   Tue Jul 5 20:05:06 2022 Tomislav Update Electronics Whitening electronics noise For whitening electronics noise for WFS1, I get (attachment). This doesn't seem right, right?      16973   Wed Jul 6 15:28:18 2022 Tega Update SUS Output matrix diagonalisation : F2P coil balancing git repo : https://git.ligo.org/40m/scripts/-/tree/main/SUS/OutMatCalc local dir:       16974   Wed Jul 6 18:51:20 2022 Deeksha Update Electronics Measuring the Transfer Function of the PZT Yesterday, we set up the loop to measure the PZT of the transfer function - the MokuLab sends an excitation (note - a swept sine      16975   Wed Jul 6 19:58:16 2022 Paco Summary NoiseBudget XARM noise budget [Anchal, Paco, Rana] We locked the XARM using POX11      16976   Wed Jul 6 22:40:03 2022 Tega Summary CDS Use osem variance to turn off SUS damping instead of coil outputs I updated the database files for the 7 BHD optics to separate the OSEM variance trigger and the LATCH_OFF

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