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ID Date Author Type Category Subject Text   14057   Thu Jul 12 14:06:39 2018 keerthana Update elog Finesse and Analytical solution - Comparison I tried to compare the cavity scan data we get from the Finesse simulation and that we expect from the Analytical solution. The      14336   Fri Dec 7 19:42:47 2018 rana Frogs elog can't upgrade DokuWiki because of PHP / SL7 All of our wikis (except the 40m one which unfortunately got turned into ligo.org mess) use DokuWiki. This now has an auto-upgrade      15274   Fri Mar 13 12:48:47 2020 Larry Wallace Update elog Cert Renewal Updated the cert in /etc/httpd/ssl. The new cert is good until March 12, 2022.      16041   Fri Apr 16 11:31:00 2021 rana Update elog elog stuck ~10 AM today found it unresponsive. Restarted fine using procedure documented in wiki      8606   Tue May 21 17:03:45 2013 Steve Update endtable upgrade enclosure tops are sealed                                8628   Thu May 23 12:02:48 2013 Steve Update endtable upgrade ETMY - oplev  Temporary oplev in place. The spot on the qpd is still big. My two lens solution did not work.      8655   Thu May 30 11:10:00 2013 Steve Update endtable upgrade ETMY - oplev                                8660   Thu May 30 20:45:53 2013 Annalisa Update endtable upgrade ETMY - oplev                                8662   Fri May 31 11:15:01 2013 Annalisa Update endtable upgrade ETMY - Mode Matching for green - new calculation  Since the beam waist after the Faraday had changed since the last time I measured it (maybe alignment changed a bit), I made      8669   Tue Jun 4 10:44:13 2013 Steve Update endtable upgrade PI pzt holders are ready The PI pzt holders are back from the shop. They are numbered 1, 2 & 3 and machined to match.      8685   Thu Jun 6 09:58:13 2013 Steve Update endtable upgrade enclosure to chamber connection    Thin wall connector from McMCarr#55275K25      8746   Tue Jun 25 19:18:07 2013 gautam Configuration endtable upgrade plan of action for PZT installation   This entry is meant to be a sort of inventory check and      8800   Wed Jul 3 21:19:04 2013 gautam Configuration endtable upgrade plan of action for PZT installation  This is an update on the situation as far as PZT installation is concerned. I measured the required cable (PZT driver      8804   Mon Jul 8 13:45:19 2013 gautam Configuration endtable upgrade Driver board verification With the help of an expansion card,  I verified that the + 15V and + 24V from the eurocrate in the slot I've identified      8823   Wed Jul 10 22:41:06 2013 gautam Configuration endtable upgrade PZT Driver Board  I did the following with the       8827   Thu Jul 11 09:15:10 2013 Steve Update endtable upgrade ETMY optable grounded ETMY optical table top was grounded to the ETMY chamber through 1 Mohms this morning. I  also strain releifed      8845   Mon Jul 15 11:51:18 2013 gautam Configuration endtable upgrade DAC at 1Y4-Max Output and Power Spectrum  Summary: I measured the maximum output of the DAC at 1Y4 as well as its power spectrum.      8846   Mon Jul 15 13:51:17 2013 Koji Configuration endtable upgrade DAC at 1Y4-Max Output and Power Spectrum We need the unit of the voltage power spectrum density to be V/sqrt(Hz).      8848   Mon Jul 15 15:54:20 2013 gautam Configuration endtable upgrade DAC at 1Y4- Power Spectrum -with the right units                                8852   Mon Jul 15 17:20:43 2013 Jenne Configuration endtable upgrade DAC at 1Y4- Power Spectrum -with the right units Those 'peaks' for the oscillations seem ridiculously broad.  I think you should look again, really quickly, with smaller      8853   Mon Jul 15 17:59:31 2013 gautam Configuration endtable upgrade DAC at 1Y4- Power Spectrum -6.4kHz bandwidth                                8857   Tue Jul 16 14:51:09 2013 gautam Configuration endtable upgrade AI Board-D000186-Modified notches  I tried shifting the notch frequencies on the D000186-revision D board given to me by Koji. The existing notches were at      8873   Thu Jul 18 19:09:08 2013 gautam Configuration endtable upgrade QPD Calibration for PZT Calibration Summary  I have been working on setting up a QPD which can eventually be used to calibrate      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      8875   Thu Jul 18 21:12:58 2013 gautam Configuration endtable upgrade AI Board-D000186-All channels modified    I carried some further modifications and tests to the AI Board. Details and observations      8877   Thu Jul 18 23:34:40 2013 gautam Configuration endtable upgrade Coarse adjustment of PZT axes orientation in mount  I have managed to orient the PZT in the mount such that its axes are approximately aligned with      8883   Fri Jul 19 22:51:40 2013 gautam Configuration endtable upgrade Second mirror glued to PZT and mounted   I      8884   Fri Jul 19 23:35:31 2013 gautam Configuration endtable upgrade Preliminary Calibration of PZT  I recalibrated the QPD today as I had shifted its position a little. I then identified the linear range      8892   Mon Jul 22 17:17:30 2013 annalisa Update endtable upgrade End table picture        8896   Tue Jul 23 00:51:46 2013 Koji Update endtable upgrade End table picture The spot on the IPANG QPD was checked. The spot is higher than the center and South side of the lens.      8910   Tue Jul 23 19:37:08 2013 Annalisa Update endtable upgrade End table picture                                8912   Tue Jul 23 20:41:40 2013 gautam Configuration endtable upgrade Full range calibration and installation of PZT-mounted mirrors  Given that the green beam is to be used as the      8930   Sun Jul 28 19:39:04 2013 Annalisa Update endtable upgrade Picture  Yend table picture updated on the wiki page      8932   Mon Jul 29 13:39:25 2013 gautam Configuration endtable upgrade PZT Driver Board-further changes     I have      8935   Mon Jul 29 21:57:45 2013 gautam Configuration endtable upgrade Hardware installed at 1X9  The following hardware      8942   Tue Jul 30 19:40:47 2013 gautam Configuration endtable upgrade DAC-PZT Driver Board Output Signal Chain Tested    [Alex, Gautam]      8943   Tue Jul 30 19:44:05 2013 gautam Configuration endtable upgrade Second mirror glued to PZT and mounted    I have      8967   Mon Aug 5 18:48:44 2013 gautam Configuration endtable upgrade Full range calibration of PZT mounted mirrors for Y-endtable  I had prepared two more PZT mounted mirrors for the Y-end some time back. These are:      9451   Mon Dec 9 11:44:08 2013 Steve Update endtable upgrade ETMY optable got new beam dump Aluminum shield replaced by razor beam dump.      9941   Mon May 12 14:42:25 2014 steve Update endtable upgrade optical table enclosure wall proposal and table at ETMY                                11591   Fri Sep 11 10:56:47 2015 Steve Update endtable upgrade ETMY optical table feedthrough The ETMY enclosure feedthrough - north is installed. The sealing material is hard to work with.      11600   Tue Sep 15 16:49:08 2015 Steve Update endtable upgrade ETMY optical table feedthrough ETMY optical table enclosure feedthrough- south is in. Now it is time to see how air tightness increases performance.      11608   Thu Sep 17 02:22:53 2015 Steve Update endtable upgrade ETMY optical table feedthrough I doubt we'll see any effect until we carefully seal the holes. If there's 1 hole in your boat it still sinks.      11897   Tue Dec 22 16:39:42 2015 Steve Update endtable upgrade ETMY optical table enclosure I think there should be a scientifically based aveluation of the ETMY enclosure so we can make the ETMX better.      12029   Thu Mar 10 16:29:32 2016 gautam Update endtable upgrade Inventory check I did a quick sweep of the lab to find out what hardware has already been acquired for the X-end table upgrade. The attached      12030   Thu Mar 10 16:32:45 2016 rana Update endtable upgrade Inventory check Its not a good idea to use green mounts with green lasers. Steve should be able to get another copy of the EY doubler mount      12033   Mon Mar 14 22:42:23 2016 gautam Update endtable upgrade Inventory check      12051   Mon Mar 28 10:43:18 2016 Steve Update endtable upgrade ETMX 4'x2' optical table pictures          12056   Wed Mar 30 17:38:52 2016 gautam Update endtable upgrade X end table proposed layout Attachment 1: This is a photo of the current X end table optical layout with the beampaths of the various      12057   Thu Mar 31 09:38:41 2016 Steve Update endtable upgrade Y end 4x3 existing layout Beam colors: 1064 nm red, 514 nm green and 633 nm yellow. There should be room for lens in

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