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ID Date Author Type Category Subject Text   16007   Thu Apr 8 17:04:43 2021 Anchal, Paco Update SUS First Successful Coil Balancing Today, we finally crossed the last hurdle and got a successful converging coil balancing run.       565   Wed Jun 25 11:36:14 2008 Max Jones Update Computer Scripts / Programs First Week Update For the first week I have been modifying the noise budget script in caltech/NB to run with 40 m parameters and data. As per Rana's      6879   Wed Jun 27 11:33:28 2012 Masha Update General First Week Update This week I wrote Matlab code, most of which can be found in /users/masha First, I wrote a simulation seismicFilter.m      6878   Wed Jun 27 11:27:49 2012 Liz Update   First Week Update! This week, the other SURF students and I got                3099   Tue Jun 22 20:07:08 2010 Jenne Update 40m Upgrading First attempt at Tip Tilt hanging [Jenne, Steve, Nancy, Gopal] We made an attempt at hanging some of the Tip      5639   Sun Oct 9 17:13:46 2011 kiwamu Update LSC First attempt to estimate mode matching efficiency using interferometer The efficiency of the mode matching (MM) to PRC (Power-Recycling      5640   Mon Oct 10 00:01:26 2011 Koji Update LSC First attempt to estimate mode matching efficiency using interferometer "^2"s are missing in the second equation, but the calculation results seem correct.      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      13250   Thu Aug 24 18:02:16 2017 Gabriele Summary LSC First cavity length reconstruction with a neural network 1) Introduction In brief, I trained a deep neural network (DNN) to recosntuct the cavity length, using as input only the  8x    13251   Thu Aug 24 18:51:57 2017 Koji Summary LSC First cavity length reconstruction with a neural network Phenomenal!      13256   Sat Aug 26 09:56:34 2017 Gabriele Summary LSC First cavity length reconstruction with a neural network Update I included the 55 MHz sideband and higher order modes in my training examples. To keep things simple,      13258   Mon Aug 28 08:47:32 2017 Jamie Summary LSC First cavity length reconstruction with a neural network      12065   Wed Apr 6 17:52:21 2016 gautam Update endtable upgrade First contact cleaning commenced I've begun cleaning the optics that will eventually go back onto the newly installed X-endtable. We decided that First Contact      14613   Thu May 16 13:07:14 2019 gautam Update SUS First contact residue removal I  used a pair of tweezers to remove the stray fiber of first contact. As Koji predicted, this was rather dry and so it      43   Thu Nov 1 01:28:04 2007 waldman Other OMC First digital lock of OMC [Pinkesh, Sam] We locked a fiber based NPRO to the suspended      13932   Fri Jun 8 01:08:22 2018 johannes Update PSL First light of AUX at YEND Among the things that we hadn't taken care of yesterday before beginning to look for transmission signals were the polarization      15534   Thu Aug 20 00:21:51 2020 gautam Update Electronics First look at HV coil driver Summary: A single channel of this board was stuffed (and other channels      15536   Sun Aug 23 23:36:58 2020 gautam Update Electronics First look at HV coil driver Summary: A more careful analysis has revealed some stability problems.       13274   Wed Aug 30 11:04:08 2017 Gabriele Summary LSC First look at neural network reconstruction of PRMI motion Introduction I trained a deep neural network (DNN) to reconstruct MICH and PRCL degrees of freedom in the PRMI configuration.      13674   Thu Mar 8 23:50:27 2018 gautam Update ALS First look at new ALS electronics Locked single arms, dither aligned, and saved offsets to EPICS (slow) sliders in anticipation of having to reboot all vertex      13675   Fri Mar 9 01:07:01 2018 gautam Update ALS First look at new ALS electronics [koji, gautam]      1714   Thu Jul 2 06:31:35 2009 Clara Update PEM First mic in place and connected I clamped Bonnie (microphone) to the top of a chamber near the vertex of the arms and placed Clyde (pre-amp) on the table right      8874   Thu Jul 18 20:20:52 2013 gautam Configuration endtable upgrade First mirror glued to PZT and mounted in modified mounts    Yesterday, I mounted the first PZT in one of the modified      11979   Fri Feb 5 16:50:24 2016 gautam Update Green Locking First pass at mode-matching I've done a first pass at trying to arrive at a mode-matching solution for the X-end table once we swtich the lasers out.      3593   Tue Sep 21 16:05:21 2010 josephb Update CDS First pass at rack diagram I've made a first pass at a rack diagram for the 1X1 and 1X2 racks, attached as png. Gray is old existing boards, power      5157   Tue Aug 9 16:21:59 2011 Manuel, Ishwita Update WienerFiltering First results of our simulations We did the simulation of the stacks by defining a transfer function for one stack  (green      2941   Mon May 17 19:42:11 2010 Jenne Update IOO First steps toward MC mode measuring [Jenne, Kevin, Steve] We made some progress toward getting the MC's beam profile measured.  In      2942   Tue May 18 01:40:56 2010 Koji Update IOO First steps toward MC mode measuring OK. Don't worry. This is just an initial confusion which we also had for the suspensions a while ago.      2945   Tue May 18 12:04:13 2010 rob Update IOO First steps toward MC mode measuring                                2949   Tue May 18 16:44:35 2010 Koji Update IOO First steps toward MC mode measuring Here is the upadted list http://lhocds.ligo-wa.caltech.edu:8000/40m/Upgrade_09/Optics      15926   Tue Mar 16 19:13:09 2021 Paco, Anchal Update SUS First success in Input Matric Diagonalization After jumping through few hoops, we have one successful result in diagonalizing the input matrix for MC1, MC2 and MC3.      10959   Fri Jan 30 02:57:03 2015 Jenne Update Modern Control First try with PRCL ASC Wiener filtering [Aside - How do you rotate plots in the new elog?  It's showing them correctly in the attachments list below the entry,  9x    6882   Wed Jun 27 14:18:30 2012 Yaakov Summary STACIS First week summary The beginning of my first week was spent at various orientations and safety meetings, some for general SURF and some more specific      16373   Mon Oct 4 15:50:31 2021 Hang Update Calibration Fisher matrix estimation on XARM parameters [Anchal, Hang] What: Anchal and I measured the XARM OLTF last Thursday.      16486   Mon Nov 29 15:24:53 2021 Hang HowTo General Fisher matrix vs length of each FFT segment We have been discussing how does the parameter estimation depends on the length per FFT segment. In other words, after we collected      5015   Thu Jul 21 23:36:51 2011 Jenny Update   Fitting beam waist with MATLAB I am starting work on the PSL table at the 40m. My goal is to lock  the laser coming from the nearby table to the FP cavity and      512   Tue Jun 3 02:15:29 2008 Andrey Summary Cameras Fitting results There have been a lot of work going on related to the processing of images captured by the      16467   Tue Nov 16 11:37:26 2021 Hang HowTo SUS Fitting suspension model--large systematic errors One goal of our sysID study is to improve the aLIGO L2A feedforward. Our algorithm currently improves only the statistical uncertainty      14439   Thu Feb 7 17:27:53 2019 Koji Summary Tip-TIlt Five FiveNine Optics Optics delivered 5 PR3/SR3 optics from FiveNine Optics were delivered. The data sheets were scanned and uploaded to the following wiki page. https://wiki-40m.ligo.caltech.edu/Aux_Optics      14442   Fri Feb 8 00:20:56 2019 gautam Summary Tip-TIlt Five FiveNine Optics Optics delivered They have been stored on the 3rd shelf from top in the clean optics cabinet at the south end. EX      16274   Tue Aug 10 17:24:26 2021 paco Update General Five day trend Attachment 1 shows a five and a half day minute-trend of the three temperature sensors. Logging started last Thursday ~ 2 pm when      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      4868   Thu Jun 23 21:35:46 2011 Jamie, Rana, Kiwamu Update SUS Fix calibration for sus sensors We have fixed the counts-to-micron (cts2um) calibration for the suspension sensor filters.  Each suspension sensor filter bank (e.g.      8325   Thu Mar 21 12:04:05 2013 Manasa Update Computers Fixed All FE computers are back. Restart procedure: 0a. Restart frame builder:      8326   Thu Mar 21 12:33:51 2013 rana Update Computers Fixed Please stop power cycling computers. This is not an acceptable operation (as Jamie already wrote before). When you don't know      8453   Sun Apr 14 17:30:14 2013 Manasa Update Locking Fixed TRY path fixed and ready for normalization. I used 2" BS at R=50 and R=98      8455   Sun Apr 14 23:20:42 2013 Den Update Locking Fixed                                8463   Thu Apr 18 21:12:56 2013 Manasa Update Locking Fixed [Den, Manasa] TRY & TRX power measurement was      8055   Mon Feb 11 13:07:17 2013 Max Horton Update Summary Pages Fixed A Calendar Bug Understanding the Code:  Documented more functions in summary_pages.py.  Since it is very difficult and slow to understand      11480   Wed Aug 5 17:15:08 2015 Eve Update Summary Pages Fixed ASC Tab I've fixed the ASC tab on the summary pages to populate the graphs with data without causing an error.

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