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ID Date Author Type Category Subject Text   3730   Fri Oct 15 21:25:23 2010 Suresh Update IOO 2W NPRO laser output power drop question   The power meter used in the measurements of elog entries 2822, 3698 and 3709 was the Ophir PD300-3W.  This power head has      3725   Thu Oct 14 23:33:45 2010 Suresh Update IOO 2W NPRO laser output power versus temperature Steve measured an apparent power drop in the 2W NPRO output from 2.1W to 1.6W(elog entry      3726   Fri Oct 15 00:15:52 2010 Koji Update IOO 2W NPRO laser output power versus temperature From the plot, you observed the reduction of the output power only by 1% between 25deg to 45deg.      3041   Wed Jun 2 22:58:04 2010 Kevin Update PSL 2W Second Reflected Beam Profile [Koji, Kevin] The profile of the Innolight 2W was previously measured by measuring the reflected      2837   Sat Apr 24 15:05:41 2010 Kevin Update PSL 2W Vertical Beam Profile The vertical beam profile of the Innolight 2W laser was measured at eight points along the axis of the laser.      2883   Wed May 5 16:58:21 2010 Koji Update PSL 2W hooked up to the interlock service Ben, Steve, and Koji Ben came to the 40m and hooked up a cable to the main interlock service.      3676   Fri Oct 8 07:41:42 2010 steve Configuration SAFETY 2W laser shutter is closed The 2 W Innolight shutter is closed and enclosure door removed. Beam path blocked. Do not change this condition.      3677   Fri Oct 8 10:38:03 2010 steve Configuration SAFETY 2W laser shutter is closed                                1872   Mon Aug 10 14:58:01 2009 Jenne Update PEM 2nd set of Guralp channels plugged into ADCU The second set of Guralp channels is now plugged into the PEM ADCU, into channels which are confirmed to be working.       1882   Mon Aug 10 18:12:25 2009 Jenne Update PEM 2nd set of Guralp channels plugged into ADCU                                5970   Mon Nov 21 16:08:04 2011 kiwamu Update Green Locking 2nd trial of Y arm ALS noise budget : broad band noise gone                                17113   Tue Aug 30 15:21:27 2022 Tega Update Computers 3 FEs from LHO got delivered today [Tega, JC] We received the remaining 3 front-ends from LHO today. They each have a timing card      17111   Mon Aug 29 15:15:46 2022 Tega Update Computers 3 FEs from LLO got delivered today [JC, Tega] We got the 3 front-ends from LLO today. The contents of each box are:      9549   Mon Jan 13 11:08:48 2014 Steve Update PSL 3 good days of IOO pointing  Three good days of IOO pointing: Friday, Sat and Sun    What was changed?  May be the clamping on      15929   Wed Mar 17 10:52:48 2021 Jordan Update SUS 3" Ring Adpater for SOS I have added a .1", 45deg chamfer to the bottom of the adapter ring. This was added for a new placement of the eq stops,      8526   Fri May 3 08:55:55 2013 Steve Update PEM 3.2 M earthquake        580   Thu Jun 26 22:08:33 2008 Jenne Update Electronics 3.7MHz bandstop filter in MC Servo The 3.7MHz elliptical bandstop filter that I made during my SURF summer is now installed in the MC servo loop to reduce the noise      1433   Thu Mar 26 04:27:26 2009 Yoichi Update Locking 3.8kHz peak as a function of the arm power During the power ramp-up, I actuated CARM using ETMs and measured the transfer functions to the PO_DC at several arm powers.      1450   Wed Apr 1 16:14:36 2009 Yoichi Update Locking 3.8kHz peak does not change with SRC offset Yoichi, Peter We suspected that maybe the 3.8kHz peak is      1449   Wed Apr 1 15:47:48 2009 Yoichi Update Locking 3.8kHz peak looks like a real optical response of the interferometer Yoichi, Peter To see where the 3.8kHz peak comes from,      9115   Fri Sep 6 09:27:10 2013 Steve Update VAC 31 days after pumpdown                                4151   Thu Jan 13 16:34:02 2011 josephb Update Computers 32 bit matlab updated There was a problem with running the webview report generator in matlab on Mafalada.  It      2126   Tue Oct 20 16:35:24 2009 rob Configuration LSC 33MHz Mod depth The 33MHz mod depth is now controlled by the OMC (C1:OMC-SPARE_DAC_CH_15).  The setting to give us the same modulation depth      11010   Thu Feb 12 03:43:54 2015 ericq Update LSC 3F PRMI at zero ALS CARM I have been able to recover the ability to sit at zero CARM offset while the PRMI is locked on RELF33 and CARM/DARM are on      10668   Wed Nov 5 01:58:54 2014 ericq Update LSC 3F RFPD RF spectra Given the checkout of the aLIGO BBPDs happening (aLOG link), wherein the PDs were acting funny,      10669   Wed Nov 5 11:09:44 2014 Koji Update LSC 3F RFPD RF spectra If you look at the intermodulation at 14 (4+10) and 16 (6+10), 15 (5+10) would make any problem, thanks to the notch at 1f and      10673   Wed Nov 5 22:25:42 2014 ericq Update LSC 3F RFPD RF spectra   Now that I have followed the chain, the PD signal is indeed being amplified at      10675   Thu Nov 6 01:58:55 2014 Koji Update LSC 3F RFPD RF spectra Where is the PD out spectrum measured with the coupler???       10679   Thu Nov 6 11:49:58 2014 ericq Update LSC 3F RFPD RF spectra                                10682   Thu Nov 6 14:41:49 2014 Koij Update LSC 3F RFPD RF spectra That's not what I'm asking. Also additional cables are left connected to the      10683   Fri Nov 7 02:21:12 2014 ericq Update LSC 3F RFPD RF spectra   After some enlightening conversation with Koji, we figured that the RF amplifier      10685   Fri Nov 7 14:41:18 2014 ericq Update LSC 3F RFPD RF spectra                                10686   Fri Nov 7 16:15:53 2014 Jenne Update LSC 3F RFPD RF spectra I have found an SHP-150, but no SHP-175's (also, several 200's, and a couple of 500's). Why do you say the SHP-150 isn't      10689   Sat Nov 8 11:35:05 2014 rana Update LSC 3F RFPD RF spectra    I think 'saturation' here is a misleading term to think about.      10692   Mon Nov 10 18:11:57 2014 ericq Update LSC 3F RFPD RF spectra  Jenne and I measured the situation using a SHP-150 directly attached to the REFL165 RF output, and at first glance, the      10696   Tue Nov 11 03:48:46 2014 Jenne Update LSC 3f DRMI I was able to lock the DRMI on 3f signals this evening, although the loops are not stable,      10698   Tue Nov 11 21:41:09 2014 Koji Update LSC 3f DRMI sensing mat Sensing matrix calculation using DTT + Matlab Note: If the signal phase is, for      10701   Wed Nov 12 03:22:23 2014 Jenne Update LSC 3f DRMI sensing mat Koji pointed out something to me that I think he had told me ages ago, and Rana alluded to last night:  Since I'm not tuning  8x    5401   Wed Sep 14 01:19:20 2011 Anamaria Configuration LSC 3f PD Install in Progress I have reconfigured the refl beam path on the AP table to include REFL33 and REFL165. Would be done if we hadn't prepared P BSs      9976   Tue May 20 16:48:52 2014 ericq Update LSC 3f Stability So, I really should have done this as soon as Manasa measured the arm lengths... I've      9977   Tue May 20 22:42:28 2014 ericq Update LSC 3f Stability  Here's the angles of MICH and PRCL from the my earlier plot by themselves; this shows that the individual demod angles in      5377   Sat Sep 10 14:55:28 2011 Keiko Update LSC 3f demodulation board check  To check the demodulation boards for REFL33 and REFL165, a long cable from ETMY (SUS-ETMY-SDCOIL-EXT      5378   Sat Sep 10 16:10:42 2011 Keiko Update LSC 3f demodulation board check There is a LP filter just after the RF input of an demodulation board (its schematic can be found as D990511-00-C on DCC). I have      5380   Sat Sep 10 18:57:52 2011 Keiko Update LSC 3f demodulation board check The phase delay due to the RF input filter on the demodulation board will not bother the      5385   Sun Sep 11 22:36:32 2011 Keiko Update LSC 3f demodulation board check Filters at the RF inputs of REFL33 and REFL165 demodulation boards were measured again. The filters will      5386   Mon Sep 12 13:24:07 2011 Keiko Update LSC 3f demodulation board check I also quickly checked the orthogonality of the demodulation board for REFL33 and REFL165 using function generators      5387   Mon Sep 12 16:27:01 2011 Keiko Update LSC 3f demodulation board check Wait. I am checking the whitening filters of the 33 and 165 demodulation boards. Also,       5388   Mon Sep 12 18:40:35 2011 Keiko Update LSC 3f demodulation board check LSC-REFL33-I-IN1(IN2, OUT) and      5394   Tue Sep 13 15:00:25 2011 Keiko Update LSC 3f demodulation board check Whitening filters for the REFL33 & 165 demodulated channels were measured and confirmed that they are working. They can      5399   Tue Sep 13 23:08:51 2011 Keiko Update LSC 3f demodulation board check Keiko, Jamie , Kiwamu The

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