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ID Date Author Type Category Subject Text   4408   Sun Mar 13 04:00:53 2011 rana Update CDS ETMY Sim work I did some work on the ETMY      4409   Sun Mar 13 16:46:48 2011 josephb Update CDS ETMY Sim work 4. The blue Output Filters  section has been changed to agree with the new filter of matrices row, column labeling.  My      13101   Sat Jul 8 17:09:50 2017 gautam Update General ETMY TRANS QPD anomaly About 2 weeks ago, I noticed some odd behaviour of the LSC TRY data stream. Its DC value seems to be drifting ~10x more than TRX.      13102   Sun Jul 9 08:58:07 2017 rana Update General ETMY TRANS QPD anomaly Indeed, the whole point of the high/low gain setup is to never use the QPDs for the single arm work. Only      367   Mon Mar 10 20:46:41 2008 John Configuration LSC ETMY Trans PD & QPD I've placed a 10% reflector in the path from ETMY to the trans and quadrant photodiodes.      2287   Tue Nov 17 21:21:30 2009 rob Update SUS ETMY UL OSEM Had been disconnected for about two weeks.  I found a partially seated 4-pin LEMO cable coming from the OSEM PD interface board.       12486   Tue Sep 13 11:00:59 2016 Lydia Update SUS ETMY UL glitch returned        12350   Thu Jul 28 22:43:03 2016 rana Update General ETMY UL magnet broke off I'd recommend replacing the wire and grinding down the clamp to prevent cutting the wire. Since we have almost never replaced      12445   Fri Aug 26 11:35:44 2016 gautam Update SUS ETMY UL sensor problematic I've been noticing that the ETMY UL sensor output has been erratic  over the last few days. It seems to be jumping      12446   Fri Aug 26 14:05:38 2016 Steve Update SUS ETMY UL sensor problematic This problem has existed well before the vent        12447   Fri Aug 26 14:09:46 2016 ericq Update SUS ETMY UL sensor problematic We do indeed have a box of clean spare OSEMs, it should be out with all of the other boxes of clean stuff we had for the suspension      12449   Sun Aug 28 21:40:11 2016 gautam Update SUS ETMY UL sensor problematic I wanted to observe the UL coil for any excursions over the weekend. Looking at the 2 day trend, something is definitely wrong.      12450   Mon Aug 29 09:37:05 2016 gautam Update SUS ETMY UL sensor problematic It looks like the problem is indeed in the Satellite box. Attachment #1 shows the second trend for the last 12 hours (~930pm      242   Wed Jan 16 18:24:41 2008 rana Update SUS ETMY Watchdog Because [COLOR=purple][B]Steve keeps complaining about ETMY[/B][/COLOR], I looked at some minute trend to see if there was something      2204   Sun Nov 8 14:18:25 2009 Alberto Update SUS ETMY Watchdogs tripped This afternoon I re-enabled the ETMY coils after I found that the watchdogs for the mirror had      17376   Sat Dec 31 19:27:32 2022 Paco Summary Calibration ETMY actuation strength cal with 5 lines Calibrated ETMY actuation strength using ALS. Attachment #1 shows the result, in close agreement with this      17377   Sat Dec 31 20:00:03 2022 rana Summary Calibration ETMY actuation strength cal with 5 lines how much frequency dependent variation in the transfer function do we expect? Are there resonances in the mechanical suspension      14551   Thu Apr 18 22:35:23 2019 gautam Update SUS ETMY actuator diagnosis [rana, gautam] Rana did a checkout of my story      2255   Thu Nov 12 15:40:27 2009 josephb, koji, peter Update Computers ETMY and Megatron test take 1 We connected megatron to the IO chassis which in turn was plugged into the rest of the ITMY setup.  We had manually turned      15653   Mon Nov 2 12:44:25 2020 gautam Update General ETMY and OMC chamber heavy doors off [koji, rana, gautam] This morning, we did the following; Removed the ETMY chamber      755   Tue Jul 29 13:54:08 2008 rana Update SUS ETMY and PRM have EQ related problems The attached trend shows that ETMY and PRM both had large steps in their sensors around the time of the EQ and didn't return      756   Tue Jul 29 14:38:02 2008 rob Update SUS ETMY and PRM have EQ related problems [quote]The attached trend shows that ETMY and PRM both had large steps in their sensors around the time of the EQ and didn't return      12434   Tue Aug 23 19:35:38 2016 gautam Update SUS ETMY back in IFO [johannes, gautam]  10x    12444   Thu Aug 25 21:11:43 2016 gautam Update SUS ETMY back in IFO There was some confusion as to the order in which we should go about trying to recover the Y arm.      1412   Fri Mar 20 12:07:19 2009 Yoichi Configuration ASC ETMY beam centering I forgot to put this in the elog. Last Sunday night, I centered the beam on the ETMY because it was too low.      5037   Tue Jul 26 11:38:45 2011 steve Update SUS ETMY bias checked    I test drove ETMY biases. PITCH  worked well in slow and      4932   Fri Jul 1 18:54:34 2011 Jamie Update SUS ETMY binary whitening switching confirmed to be fixed After finally figuring out what was messed up with ETMY I was able to get good measurements      12452   Mon Aug 29 21:53:14 2016 Lydia Update SUS ETMY bounce mode coupling [gautam, johannes, lydia] We decided to try some different approaches on minimizing the ETMY bounce      4060   Wed Dec 15 17:21:20 2010 josephb Update CDS ETMY controls status Status: The c1iscey was converted over to be a diskless      4075   Mon Dec 20 10:06:36 2010 kiwamu Update CDS ETMY damped   Last Saturday I succeeded in damping the ETMY suspension      133   Wed Nov 28 17:15:26 2007 rana Configuration SUS ETMY damping / watchdogs Steve has noted that ETMY was often tripping its watchdog. I saw this again today.      1103   Fri Oct 31 08:52:19 2008 steve Update SUS ETMY damping restored ETMY watchdogs were tripped yesterday morning also. This is a problem that existed some months ago.(?)      2813   Tue Apr 20 08:00:52 2010 steve Update SUS ETMY damping restored ETMY sus damping was restored      4775   Tue May 31 17:30:42 2011 steve Update SUS ETMY damping restored ETMY's watch dogs were found tripped. They were restored.      6643   Mon May 14 08:49:47 2012 steve Update SUS ETMY damping restored ETMY sus damping restored.      9388   Fri Nov 15 08:01:20 2013 Steve Update SUS ETMY damping restored ETMY sus damping restored      9600   Wed Feb 5 09:28:32 2014 Steve Update SUS ETMY damping restored ETMY damping restored.      1572   Sun May 10 13:41:17 2009 steve Update VAC ETMY damping restored, VC1 opened ETMY damping restored. Cryo  interlock closed VC1 ~2 days ago. P1 is 6.3 mTorr. Cryo temp 12K      4068   Fri Dec 17 02:22:06 2010 kiwamu Update CDS ETMY damping: not good   I made some efforts in order to damp ETMY, however it still doesn't      14608   Wed May 15 00:40:19 2019 gautam Update SUS ETMY diagnosis plan I collected some free-swinging data from earlier today evening. There are still only 3 peaks visible in the ASDs, see Attachment      2366   Tue Dec 8 13:03:26 2009 Koji Update COC ETMY drag wiped Jenne, Kiwamu, Alberto, Steve,      8595   Fri May 17 15:38:51 2013 Steve Update 40m upgrading ETMY enclosure is on the way back    It  will arrive around 10 am Monday morning.      8423   Mon Apr 8 16:37:26 2013 Steve Update 40m Upgrading ETMY enclosure wall transmission    Enclosure cover #1 transmission measured  in 1064 nm,  156 mW,       2956   Thu May 20 12:10:44 2010 kiwamu Update Photos ETMY end table  I updated the photo of ETMY end table on the wiki. http://lhocds.ligo-wa.caltech.edu:8000/40m/Optical_Tables      4848   Tue Jun 21 19:10:29 2011 Suresh Update Environment ETMY end table [Suresh, Sonali] There were small pieces of glass, remnants      5163   Wed Aug 10 01:40:40 2011 Koji Update SUS ETMY exploration [Rana Koji Jenne Jamie] - The situation of the ETMY suspension is improved.      5164   Wed Aug 10 02:29:38 2011 Jenne Update SUS ETMY exploration                                1603   Mon May 18 21:34:18 2009 rana Configuration SUS ETMY f2pRatio script run Now that the ETMY optical lever is not so bad, I ran the f2pRatio script and it seems to have worked.      1605   Tue May 19 12:30:41 2009 rob Configuration SUS ETMY f2pRatio script run [quote]Now that the ETMY optical lever is not so bad, I ran the f2pRatio script and it seems to have worked.      16731   Thu Mar 17 11:40:41 2022 Paco Update SUS ETMY green PZT HV supply [Anchal, Paco] We installed a HV kepco power supply for the green PZT steering the YAUX beam.

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