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ID Date Author Type Category Subject Text   8100   Mon Feb 18 21:43:05 2013 Koji Update Alignment POP path set up but AS55 is broken I undertook the investigation of the AS55 PD. I found the PD is not broken.      8101   Mon Feb 18 23:41:15 2013 Sendhil Update Alignment Aligned IPPOS, IPANG and OPLEVS [Yuta, Sendhil] We aligned IPPOS, IPANG and all OPLEVs (except for ETMX and SRM).      8113   Wed Feb 20 01:40:37 2013 Manasa Update Alignment Final IFO alignment- in progress [Yuta, Sendhil, Jamie, Jenne, Rana] 1. After the MC centering, we tried      8114   Wed Feb 20 03:13:10 2013 yuta Update Alignment clipping centering checklist I attached clipping/centering checklist for the alignment. Blue      8115   Wed Feb 20 10:13:41 2013 yuta Update Alignment PRC flashing brighter than last week After in-vac alignment work last night, PRC is flashing brighter than PRMI alignment last week.      8116   Wed Feb 20 18:35:42 2013 Jenne Update Alignment New in-vac alignment procedure I have updated the vacuum checklist for in vacuum alignment.  Please take a look (https://wiki-40m.ligo.caltech.edu/vent/checklist)      8117   Wed Feb 20 18:53:48 2013 Jenne Update Alignment IFO ready for doors, then pumping [Yuta, Manasa, Sendhil, Jenne, Steve, Jamie, Koji, Evan]      8118   Wed Feb 20 19:20:50 2013 Evan Update Alignment AS camera alignment [Manasa, Evan] Manasa and I are trying to get the AS beam onto the AS camera with a focusing      8119   Wed Feb 20 19:48:16 2013 yuta Update Alignment BS table oplev re-arranged [Sendhil, Yuta] After aligning IFO and putting the      8120   Wed Feb 20 19:58:59 2013 rana Update Alignment BS table oplev re-arranged Please confirm the SRM OL beam is not too bad and also find where the mis-aligned SRM puts its beam. WE want to be sure that there      8121   Wed Feb 20 20:15:29 2013 yuta Update Alignment SRM oplev status Currently, SRM is misaligned in pitch so that SRM reflected beam hits on the top edge of SR3 (not on the mirror, but on the cage      8122   Wed Feb 20 20:58:37 2013 yuta Update Alignment clipping centering checklist Blue ones are the ones we checked yesterday. Green      8123   Wed Feb 20 21:12:37 2013 rana Update Alignment clipping centering checklist    Is the beam going towards the OMC going to cause backscatter because of      8124   Wed Feb 20 21:56:08 2013 yuta Update Alignment clipping centering checklist I'm not sure about the OMC situation at 40m. I think there are no direct beam reflected back into IFO from OMC path. There must be      8157   Mon Feb 25 15:30:29 2013 yuta Update Alignment Y arm locked, both colors [Koji, Yuta] We aligned Y arm to Y green and tweaked      8158   Mon Feb 25 17:58:28 2013 rana Update Alignment Y arm locked, both colors    That's good news. I was ready to give up and say we should vent and remove      8162   Mon Feb 25 21:25:14 2013 yuta Update Alignment both arms locked in IR [Jenne, Evan, Yuta] After Y alignment, X arm is aligned      8164   Mon Feb 25 22:42:32 2013 yuta Summary Alignment current IFO situation [Jenne,Yuta] Both arms are aligned starting from      8244   Wed Mar 6 18:51:07 2013 Annalisa Update Alignment Auxiliary laser installed for FSR and TMS measurement of the PRC We want to measure the g-factor of the PRC using the beat note of the main laser with an auxiliary NPRO laser.      8252   Thu Mar 7 18:12:03 2013 yuta Update Alignment Input beam drift ~ 0.1 mrad/h in pitch [Jenne, Manasa, Yuta] We temporarily centered the beam on      8260   Fri Mar 8 16:02:52 2013 Jenne Update Alignment Getting closer to beam centering on Yarm I'm working on getting the input beam centered on the Yarm optics.  To do this, I measured the spot positions, move the tip tilts, realign      8262   Fri Mar 8 20:51:00 2013 Manasa Update Alignment Input beam drift - investigation **IMPORTANT** Checking the drift in input pointing (TT2 is the main suspect)      8267   Mon Mar 11 12:29:25 2013 Manasa Update Alignment Input beam drift - weekend trend I centered ipang and ippos on the QPDs (using only the steering mirrors) and wanted to see the drift over the weekend.      8276   Tue Mar 12 00:58:05 2013 Manasa Update Alignment Yarm - Spot positions centered [Jenne, Manasa]      8279   Tue Mar 12 14:02:22 2013 Jenne Update Alignment Beam drift - mystery partially solved? Steve just told those of us in the control room that the custodian who goes into the IFO room regularly steps on the blue support      16846   Thu May 12 13:46:59 2022 Jc Update Alignment POP Beam [Tega, JC] Tega and I went in to adjust the POP being in the ITMX Table. The beam entered      16847   Thu May 12 17:20:08 2022 Paco Update Alignment POP Beam on CCD [Paco] Got POP beam centered on camera and nominally on the two PDs. Attachment      16851   Fri May 13 14:26:00 2022 JC Update Alignment LO2 Beam [Yehonathan, JC] Yehonathan and I attempted to align the LO2 beam today through the BS chamber      16852   Fri May 13 18:42:13 2022 Paco Update Alignment ITMX and ITMY sat amp failures [Yuta, Anchal, Paco] As described briefly by JC, there were multiple failure modes going during      1984   Fri Sep 11 17:07:45 2009 Jenne Update Adaptive Filtering Minor changes to ASS_TOP_PEM screen. There was some uncertainty as to which channels were being input into the Adaptive Filtering screen, so I checked it out to      1988   Wed Sep 16 11:58:11 2009 Jenne Update Adaptive Filtering New Filters for Adaptive Filtering When Sanjit and I were looking at the adaptive filtering system on Monday and Friday, we noticed that turning on the Accelerometers      2001   Fri Sep 25 16:10:17 2009 Jenne Update Adaptive Filtering Some progress on OAF, but more still to be done [Jenne, Sanjit] It seems now that we are able to get the OAF system to do a pretty good job      2004   Fri Sep 25 19:55:59 2009 Jenne Update Adaptive Filtering Subtraction of the microseism using Adaptive Filtering! [Rana, Jenne] The OAF system did something useful today!  Attached is a plot.  Black      2029   Wed Sep 30 17:49:21 2009 Jenne Update Adaptive Filtering New UP/DOWN scripts for OAF [Sanjit, Jenne] The up and down scripts accessible from the OAF (still C1:ASS-TOP) screen are      2054   Mon Oct 5 18:34:26 2009 Jenne Update Adaptive Filtering Attempts to take a TF of the OAF system [Jenne, Sanjit] As per Matt's instructions in his OAF document (elog      2058   Tue Oct 6 11:13:53 2009 Jenne Update Adaptive Filtering Attempts to take a TF of the OAF system                    2061   Wed Oct 7 03:49:49 2009 rana Update Adaptive Filtering Attempts to take a TF of the OAF system  Here's a plot of the spectra of the seismometers and MCL. The coherence shows which axes are aligned right now: MC1_X is      2063   Wed Oct 7 07:42:55 2009 rana Update Adaptive Filtering Attempts to take a TF of the OAF system I remeasured the OAF time delay using the OAF-TF template      2065   Wed Oct 7 19:23:49 2009 Jenne Update Adaptive Filtering (Final?) PEM cabling changes                    2066   Wed Oct 7 20:32:21 2009 rana Update Adaptive Filtering extra delay and noise in PEM -> ASS/OAF system [Rana, Jenne] There is some craziness going on with the delay in the PEM path for the OAF.       2074   Fri Oct 9 03:53:56 2009 Jenne Update Adaptive Filtering Remaking the ASS The c1ass computer, which is now used for the OAF system, has many remnants from the days when it was actually used as an ASS.       2116   Mon Oct 19 11:31:55 2009 Jenne Update Adaptive Filtering extra delay and noise in PEM -> ASS/OAF system                    2121   Mon Oct 19 19:37:39 2009 Sanjit, Jenne Update Adaptive Filtering extra delay and noise in PEM -> ASS/OAF system Rana pointed out that the delay may be caused by the 110B DAQ, as it integrates over 2ms (5 clock cycles at 2048Hz on the      2125   Tue Oct 20 11:38:10 2009 rana, rolf Update Adaptive Filtering extra delay and noise in PEM -> ASS/OAF system An email from Rolf about the delay in the 110Bs:       2143   Mon Oct 26 17:45:34 2009 Jenne Update Adaptive Filtering New changes to the OAF fe code [Alex, Jenne, Sanjit] Alex came to the 40m today, and did several awesome things in OAF-land.      2159   Thu Oct 29 18:04:02 2009 Jenne Update Adaptive Filtering More work on saving coeffs on the OAF screen [Sanjit,Jenne] Sanjit has been working today on trying to get the OAF coefficients to save      2160   Thu Oct 29 18:25:33 2009 Sanjit Update Adaptive Filtering More work on saving coeffs on the OAF screen                    2171   Mon Nov 2 21:09:15 2009 Sanjit Update Adaptive Filtering More work on saving coeffs on the OAF screen   I made some changes in the code (all commented in the installed and SVN version)      2199   Fri Nov 6 19:25:31 2009 Sanjit, Jenne, Joe Update Adaptive Filtering More work on saving coeffs on the OAF screen           2232   Wed Nov 11 00:55:47 2009 Jenne Update Adaptive Filtering Terms put on some ADC inputs Mostly a note to self:  I have put terminators on the ADC inputs which are usually the PEM-SEIS-GUR2_(XYZ) channels.  Since

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