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ID Date Author Type Category Subject Text   17555   Thu Apr 20 23:51:14 2023 Anchal Update ALS DFD demod normalized by amplitude I did offline analysis with the available data. We were only saving signals at 2048 Hz rate, so analysis can not be done on 1.4      17554   Thu Apr 20 12:00:34 2023 rana Update ALS DFD demod normalized by amplitude how about the other idea of downloading the I & Q channels and doing the analysis offline? I'm curious if its better or      17553   Wed Apr 19 22:46:17 2023 Paco Update ALS DFD demod normalized by amplitude [Anchal, Paco] We updated the LSC model to use the amplitude as a normalization (analogous      17552   Wed Apr 19 17:32:11 2023 Alex Update IMC Beam offset calculation for MC1,2,3 from dither results Today, we ran dither lines on the MC1,2,3 mirrors in YAW from 136598007 to 1365981967 and similarly      17551   Wed Apr 19 17:02:48 2023 Yehonathan Summary SUS Coil dewhitening check for BS and ITMX [Yehonathan, Paco] Repeated the coil dewhitening check for BS. Attachment #1 show      17550   Wed Apr 19 15:12:01 2023 yuta Summary SUS Coil dewhitening check for PRM [Mayank, Paco, Yohanathan, Yuta] We checked if coil dewhitening switch is working by measuring transfer function      17549   Wed Apr 19 11:35:20 2023 Yehonathan Update BHD PRMI estimated noise budget First, simple stuff. We estimate the noise budget with total input and output noises. Later, we will break it down (ADC, DAC, whitening,      17548   Wed Apr 19 09:52:50 2023 Radhika Update NeuralNet Rayleigh spectrograms Attached are the Rayleigh spectrograms of the error/control signal channels associated with the NN nonlinear control of IMC  6x    17547   Tue Apr 18 19:29:43 2023 yuta Update BHD LO phase noise measurements in ITMX single bounce, MICH and FPMI [Anchal, Yuta] We have repeated LO phase noise measurement      17546   Tue Apr 18 17:37:58 2023 rana Summary ASC RL controller left for overnight Anchal and I turned on another RL policy (ninedwarfs) with Chris's help. It looks to be performing great,      17545   Fri Apr 14 07:31:28 2023 JC Update General Accelerometer for Tours I was able to get this accelerometer going for the next Lab tours. I want to get this guy up on a big screen to give people a nice      17544   Thu Apr 13 17:58:16 2023 Paco Update ALS Moku Phasemeter calibration and ALS noise Ditto of 40m/17543 but for XBEAT >> Calibrated to 0.3061 +/-      17543   Thu Apr 13 11:38:50 2023 Anchal Update ALS Moku Phasemeter calibration I calibrated the moku phasemeter setup for reading beatnote fluctuations today. The calibration is referred to the DFD output      17542   Wed Apr 12 21:32:22 2023 yuta Summary LSC PRMI BHD power measurements [Paco, Yuta] We measured the power around BHD PDs to see if the numbers make sense.      17541   Wed Apr 12 16:11:41 2023 Radhika Summary LSC PRMI sensing matrix and RF demodulation phase tuning [Yuta, Radhika] We copied the coil balancing procedure found in /scripts/SUS/coilStrengthBalancing/AS1/CoilStrengthBalancing.ipynb      17540   Tue Apr 11 19:46:45 2023 Radhika Update ALS X end green now indefinitely locking I measured the OLTF of the XAUX-PDH loop [Attachment 1] now that the green laser is stably locking. I injected an excitation (100mVpp)      17539   Fri Apr 7 16:28:34 2023 Radhika Summary LSC PRMI sensing matrix and RF demodulation phase tuning [Paco, Radhika] To determine the PRM angle-to-length coupling for PRCL, we want to inject pitch/yaw      17538   Thu Apr 6 21:09:12 2023 Koji Summary NeuralNet Testing neural network controller during day time I'm going to get into the PSL enclosure. Also turn on the HEPA for a while during the intrusion.      17537   Thu Apr 6 11:49:45 2023 Anchal Summary NeuralNet Testing neural network controller during day time I've turned on NN controller for MC WFS PIT loops. One can disable this controller and go back to linear controller by      17536   Wed Apr 5 16:44:31 2023 Radhika Summary LSC PRMI sensing matrix and RF demodulation phase tuning [Paco, Radhika] We calibrated the PRM oplev.      17535   Tue Apr 4 11:10:19 2023 Anchal Summary NeuralNet Testing neural network controller during day time I ran two recently trained neural network controllers today between 10 am and Noon. Each test comprised of four segments:      17534   Tue Apr 4 11:03:35 2023 JC Summary Electronics SR560: reworking <p>I purchased some more of these from DigiKey. These parts are currently in the EE shop. These are replacements for the NDP5565 part      17533   Mon Apr 3 12:01:59 2023 Radhika Summary LSC PRMI sensing matrix and RF demodulation phase tuning [Paco, Radhika] We locked PRMI in carrier. We      17532   Thu Mar 30 16:45:09 2023 Paco Summary LSC PRMI gain estimates and expected flashing at BHD and POP ports Here are our best estimates for the optic transmission (power) coefficients.      17531   Thu Mar 30 09:51:41 2023 Paco Update ALS XALS / YALS power normalized and noise spectra After the XAUX - XARM lock was recovered the C1:ALS-TRX_GAIN was set from 0.002 to 0.0006 to normalize the green transmission      17530   Wed Mar 29 19:19:41 2023 Koji Update ALS X end green now indefinitely locking Stable lock of the X End green laser was recovered. - The biggest issue  6x    17529   Wed Mar 29 17:00:23 2023 Anchal Update IOO MC Length feedback is present but not visible in MEDM I confirmed that MC Length feedback path to MC2 position is present and has been turned off in recent history. Feedback filter module      17528   Wed Mar 29 16:36:04 2023 Paco Summary BHD "On why BH55 senses the LO phase, a finesse adventure of loss and residual DARM offsets" I repeated the calculations but with FPMI (last case was all MICH). The qualitative behavior      17527   Wed Mar 29 15:59:01 2023 Anchal Update IOO c1ioo model updated to add sensing to optic angle matrices I've updated c1ioo model with adding WFS sensor to optic angle matrix and output filter module option. The output filter modules      17526   Tue Mar 28 10:58:03 2023 rana Summary BHD "On why BH55 senses the LO phase, a finesse adventure of loss and residual DARM offsets" but what about including the DC reflectivity imbalance of the arms? there would be another BH55 term from that field maybe.      17525   Mon Mar 27 20:28:57 2023 Paco Summary BHD "On why BH55 senses the LO phase, a finesse adventure of loss and residual DARM offsets" Yuta pointed out that the BH55 signal was weirdly never going to zero, so I actually tuned the demod angle and made sure I was      17524   Sun Mar 26 19:13:48 2023 yuta Summary LSC PRMI sensing matrix and RF demodulation phase tuning that is really a lot of high precision for the REFL_11 demod phase... for this kind of measurement, I      17523   Fri Mar 24 15:05:41 2023 yuta Summary LSC PRMI sensing matrix and RF demodulation phase tuning PRMI sensing matrix was measured under PRMI locked with REFL55_I and Q. MICH actuator is 0.5*ITMX-0.5*ITMY      17522   Fri Mar 24 12:54:51 2023 yuta Summary LSC Actuator calibration of PRM using PRY PRM actuator was calibrated using PRY by comparing the actuation ratio between ITMY. It was measured to be      17521   Thu Mar 23 19:15:39 2023 yuta Summary LSC PRMI locked using REFL55 [Paco, Yuta] We locked PRMI in sideband using REFL55_I and      17520   Thu Mar 23 17:47:53 2023 Paco Update NoiseBudget LO phase noise budget (BH55_Q) I drafted a calibrated LO Phase noise budget using diaggui whose template is saved under /opt/rtcds/caltech/c1/Git/40m/measurements/BHD/LO_PHASE_cal_nb.xml      17519   Thu Mar 23 16:21:10 2023 rana Update IMC Beam offset calculation for MC1,2,3 from dither results I have changed the MC SUS output matrices by a few % for some A2L decoupling - if it causes trouble, please feel free to revert.      17518   Thu Mar 23 14:20:29 2023 Koji Summary BHD "On why BH55 senses the LO phase, a finesse adventure of loss and residual DARM offsets" This is interesting. With the FPMI, the DARM phase shift is enhanced by the cavity. Therefore, I suppose the effect on the BH55      17517   Wed Mar 22 18:38:54 2023 Paco Summary BHD "On why BH55 senses the LO phase, a finesse adventure of loss and residual DARM offsets" [Paco, Yehonathan] I took over the finesse calculations Yehonathan had set up for BHD. The notebook      17516   Wed Mar 22 15:51:44 2023 Alex Update IMC Beam offset calculation for MC1,2,3 from dither results I have organized the resulting data from running dither lines on MC1,2,3. The data has been collected from diaggui as shown      17515   Tue Mar 21 18:41:12 2023 Alex Update IMC Dither Lines set on MC1, MC2, MC3 for the night With Anchal's help, I have setup dither lines for Rana on MC1,2,3 that will be running overnight. The oscilations were set on MC1,2,3,      17514   Mon Mar 20 20:27:30 2023 yuta Update BHD LO phase noise contribution in MICH BHD [Paco, Yuta] MICH was locked with balanced homodyne readout with LO phase locked using BH55_Q      17513   Fri Mar 17 17:27:58 2023 Alex, Tomohiro Update IMC Arm Cavity Noise injection with WFS1/2 PIT and YAW Tomohiro and I performed some tests under Rana's guidance to find cross corelations between WFS1 and WFS2 output signals in both  8x    17512   Thu Mar 16 13:31:25 2023 Tomohiro Update IMC Diagonalizing YAW output matrix using a different method Purpose To adjust the components of the WFS2 column in the YAW output      17511   Tue Mar 14 18:44:39 2023 yuta Update BHD LO phase noise measurements in ITMX single bounce, MICH and FPMI [Anchal, Yuta] We have measured LO phase noise in      17510   Tue Mar 14 15:46:06 2023 Tomohiro Update IMC Diagonalizing YAW output matrix using a different method Alex, Anchal, and I adjusted the number of the MC2-TRANS column in the YAW output matrix. We used the same method in 40m/17504 but      17509   Tue Mar 14 13:59:11 2023 Anchal Update IMC IMC WFS aligned and offsets reset The WFS loops were not maximizing the IMC transmission. The transmission counts remained stuck at around 12500 counts. The reflection      17508   Tue Mar 14 11:38:44 2023 Anchal Update IMC Turned on 6:3lead FM7 on WFS1 and WFS2 YAW loops I realized that for more phase margin, rana added 6:3lead filter on WFS PIT loops.      17507   Tue Mar 14 11:34:05 2023 Alex HowTo Computer Scripts / Programs Summary Pages Restart If the summary pages go down, it could be from a break in the script or some small error. The first remedy for fixing this can      17506   Mon Mar 13 19:53:36 2023 yuta Update BHD FPMI BHD sensing matrix measurement with individual lines FPMI BHD sensing matrix was measured by an updated method with updated RF demodulation phases for REFL55 and AS55.

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