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ID Date Author Type Category Subject Text   9420   Thu Nov 21 10:24:50 2013 Koji Update SUS beam dumps You don't need the fourth glass piece on the diamond beam dump.      15930   Wed Mar 17 11:57:54 2021 Paco, Anchal Update SUS Tested New Input Matrix for MC1 [Paco, Anchal] Paco accidentally clicked on C1:SUS-MC1_UL_TO_COIL_SW_1_1 (MC1 POS to UL Coil Switch) and clicked it      7358   Fri Sep 7 09:37:20 2012 Steve Update Cameras baffle plate for SOS                                7375   Wed Sep 12 17:02:00 2012 Steve Update Cameras baffle plate hole getting larger                                9419   Thu Nov 21 09:56:15 2013 Steve Update SUS green glass beam dumps  Green welding glass  is used in these Koji      15160   Mon Jan 27 21:35:06 2020 Yehonathan Update PSL Ringdown measurements Zeroth order IMC ringdown setup Following      15617   Wed Oct 7 16:56:23 2020 anchal Summary ALS ALS noise budget update - Updated AUX PDH Loop values AUX PDH Loop update I used D1400293 to get the latest logged details about the      11926   Tue Jan 12 03:03:55 2016 ericq Update LSC Frequently making noise Gautam will soon follow up with detailed analysis, but here is a brief summary of some of our activities and findings.      11924   Sat Jan 9 00:39:15 2016 gautam Update LSC AUX Y Freq Noise re-measured      11925   Mon Jan 11 19:01:56 2016 gautam Update LSC PLL Marconi Investigation EDIT 01/12/2016 6PM: I've updated the plots of the in-loop  6x    11929   Tue Jan 12 19:38:31 2016 gautam Update LSC Frequently making noise EDITS 15Jan: Schematic      15290   Wed Apr 1 00:51:41 2020 gautam Update Wiener Slightly improved MCL FF Summary: Retraining the MCL filters resulted in a slight improvement in the performance.      15619   Thu Oct 8 11:59:52 2020 rana Summary ALS ALS noise budget update - Updated AUX PDH Loop values For all the loops where we drive the NPRO PZT, there is some notch/resonance feature due to the PZT mechanical resonance. In the      3290   Mon Jul 26 10:04:24 2010 steve Update General Initial Crane Inspection reveals flaws: wiring, oil and imbalance                                3312   Wed Jul 28 16:42:21 2010 steve Update General Crane gear box cheched                                3378   Fri Aug 6 17:47:36 2010 steve Summary General cranes load tested at 1998 lbs                                15177   Thu Jan 30 15:24:10 2020 ? Update General delay line frequency discriminator for PM yes, its fine to use this with a level 3 or level 7 mixer; let's      2438   Mon Dec 21 07:30:58 2009 ??? Update ASS OAF Model update and build instructions  What does OAF stand for? The entry doesn't say that. Also the acronym is not in the abbreviation page of the wiki.      12153   Tue Jun 7 17:21:13 2016 Aakash Update General SURF 2016 Hi! I am Aakash Patil. I will be working at the 40m lab as a SURF student with Gautam      12160   Thu Jun 9 09:57:06 2016 Aakash Update General Seismometer Enclosure Development Me and Gautam yesterday opened the tilt-free seismometer enclosure to see if we could use the thermocouples      12163   Thu Jun 9 18:54:40 2016 Aakash Update General About Acromag | SURF 2016 Today I tried to setup Acromag Busworks card. I was able to calibrate and test it over USB but I couldn't test it over      12172   Mon Jun 13 19:30:58 2016 Aakash Update General EPICS Installation | SURF 2016 About acquiring data: Initially I couldn't start with proper Acromag setup as the Raspberry pi had a faulty SD card slot. Then Gautam      12224   Tue Jun 28 22:54:43 2016 Aakash Update General Seismometer Enclosure Development | SURF 2016 The existing enclosure for seismometer at LIGO 40m lab is a cylindrical stainless steel can placed upside down over the seismometer.      12225   Wed Jun 29 00:09:36 2016 Aakash Update General Things from past | SURF 2016 I have taken out the heaters and temperature sensors from the enclosure which was made by Megan last summer. Soon I will test and      12236   Fri Jul 1 01:52:54 2016 Aakash Update General Seismometer Enclosure Development | SURF 2016 I have transferred most of the temperature measurement stuff from the front area to seismometer at the end of Y-arm.  While      12253   Wed Jul 6 16:40:09 2016 Aakash Update General Seismometer Enclosure Development | SURF 2016 I am using AD592CNZ temperature transducer ICs for measuring temperature inside as well as outside the enclosure.      12273   Fri Jul 8 13:01:23 2016 Aakash Update General Acromag is talking ! | SURF 2016 Acromag is talking now, after few changes to the original EPICS configuration and cross compile configuration. Modbus config files      12306   Fri Jul 15 17:44:37 2016 Aakash Summary General Acromag Setup | SURF2016 Aidan has described the physical connections and initial setup here :  https://nodus.ligo.caltech.edu:30889/ATFWiki/doku.php?id=main:resources:computing:acromag#recovering_from_a_terminal_power_communication_outage  .      12308   Mon Jul 18 05:05:05 2016 Aakash Update General Heater for Seismometer Enclosure | SURF 2016 I took off the silicon rubber heaters which were used by a SURF last year for heating the enclosure. The heater data sheet has      12317   Thu Jul 21 05:22:26 2016 Aakash Update General Temperature measurements across the enclosure | SURF 2016 I have measured the transfer function of temperature fluctuations inside the enclosure to that of the temperature fluctuations outside.      12323   Thu Jul 21 21:38:44 2016 Aakash Update General Temperature measurements across the enclosure | SURF 2016 I have made the changes as suggested by Gautam.      12326   Fri Jul 22 05:20:26 2016 Aakash Update General Temperature measurements across the enclosure | SURF 2016 Please find the new attached plots and the new script.      12352   Fri Jul 29 03:44:04 2016 Aakash Summary   About Acromag | SURF 2016 I tried to recompile the modbusApp binary for linux-arm acrhitecture since I suspected someting wrong with it. But still the problem      12360   Mon Aug 1 18:50:29 2016 Aakash Update General Acromag Setup | SURF2016 There were many unknown and unsolved problems with using modbusApp for linux-arm architecture. So I tried to install the necessary files  7x    12366   Wed Aug 3 15:35:19 2016 Aakash Update General Acromag Setup | SURF2016 Lydia helped me to troubleshoot the Accromag connection problems which I was facing previously.  If power goes off/turned off manually, the      3484   Sat Aug 28 08:17:51 2010 Aberto Update Electronics FSS Frequency Generation Box under test I've taken the FSS frequency generation box out of the 1Y1 rack. It's sitting on one of the electronics benches. I'm measuring      161   Mon Dec 3 19:44:58 2007 Accelerometers on new mounts Configuration PEM Andrey I (Andrey) continued today working with new accelerometer mounting. (see entry #151 about      742   Sat Jul 26 15:09:57 2008 Aidan Update Computers Reboot of op440m I was reviewing the PSL Overview screen this afternoon and op440m completely froze when      1205   Mon Dec 29 18:01:07 2008 Aidan Update Auxiliary locking Updated 40m Upgrade Document T080074-00-R Added a paragraph to the 40m Upgrade document describing the fiber stabilization and frequency      1687   Fri Jun 19 13:39:29 2009 Aidan Update General Upper limit measurement of the scatter from the eLIGO beam dumps.        1782   Thu Jul 23 07:34:45 2009 Aidan Update CDS Added C2 MEDM screens to 40m SVN.   See Adhikari eLOG entry: http://nodus.ligo.caltech.edu:8080/AdhikariLab/194      2792   Mon Apr 12 17:48:32 2010 Aidan Update Computer Scripts / Programs elog restarted  The elog crashed when I was uploading a photo just now. I logged into nodus and restarted it.      2793   Mon Apr 12 19:50:30 2010 Aidan Summary Green Locking Temperature sweep of the Lightwave: df/dT = 2.8GHz/K The beams from the Innolight and Lightwave NPROs were both incident on a 1GHZ New Focus PD. Mott and I swept the temperature of the      2807   Mon Apr 19 11:31:04 2010 Aidan Update Green Locking 1W NPRO output profile                                2809   Mon Apr 19 16:27:13 2010 Aidan Update Green Locking Raicol crystals arrived and we investigated them Jenne, Koji and I opened up the package from Raicol and examined the crystals under the microscope. The results were mixed and      2816   Tue Apr 20 11:14:31 2010 Aidan Update Green Locking Raicol crystals arrived and we investigated them    Here is Crystal 724 polished side 2 with all photos      2910   Tue May 11 14:39:17 2010 Aidan Update Green Locking Green Laser Beam Profile    Here's a photo of the set-up used. The beam profile is measured relative      2951   Wed May 19 14:36:46 2010 Aidan HowTo Phase Camera Phase Camera algorithm and stuff  I had a think about the algorithm we might use for the phase camera measurement. MATLAB has an fft function that will allow      2955   Thu May 20 10:06:56 2010 Aidan HowTo Phase Camera Phase Camera- raw data video        2995   Wed May 26 18:54:55 2010 Aidan Summary Green Locking Mounted Crystal 724 in the Doubling Oven Andri and I mounted the Raicol Crystal #724 in one of the new Covesion Ovens. The procedure was the same as before - see

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