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ID Date Author Type Category Subject Text   9808   Mon Apr 14 17:59:05 2014 Jenne Configuration PEM New T-240 cable As payment for borrowing 2 of our seismometers, Zach has made us a new Trillium cable, to go from the granite station to the readout      9807   Mon Apr 14 13:20:45 2014 Jenne Update LSC IFO Configure screen updated, CARM / DARM scripts added I have compressed the IFO Configure screen.  All PRMI things (sideband lock and carrier lock) are in the PRMI button, all arm things      9806   Mon Apr 14 11:19:55 2014 Jenne Update LSC MC WFS found off I'm not sure why, but the WFS were turned off when I came in this morning.  The MC was not staying locked, and even during      9805   Sun Apr 13 13:03:34 2014 rana Update LSC   That's a very smooth DARM transition - its good news that the dALS signals don't have a huge offset w.r.t the real error signal.      9804   Fri Apr 11 18:55:28 2014 manasa Update LSC arm length measurements Arm lengths were measured using ALS      9803   Fri Apr 11 16:04:31 2014 Koji Update LSC congratulation It's just one of the stepping stones, but not yet a mile stone.      9802   Fri Apr 11 14:57:53 2014 steve Update LSC congratulation          9801   Fri Apr 11 12:32:33 2014 ericq Update LSC CARM and DARM both on IR signals!!!!!!!!!                                9800   Fri Apr 11 12:21:27 2014 Koji Update LSC CARM and DARM both on IR signals!!!!!!!!! About the ADC range, According to the elogs, DARM = AS55Q/400. So in the current level, the error has +/-40cntpp      9799   Fri Apr 11 11:58:24 2014 Jenne Update LSC CARM and DARM both on IR signals!!!!!!!!!  A few time series from last night's data.  300 seconds, starting from 1081240100,      9798   Fri Apr 11 10:30:48 2014 jamie Update LSC CARM and DARM both on IR signals!!!!!!!!!                                9797   Fri Apr 11 02:09:31 2014 Jenne Update LSC CARM and DARM both on IR signals!!!!!!!!! [EricQ, Jenne] A few more details on our work for the evening, of       9796   Fri Apr 11 01:02:07 2014 Jenne Update LSC CARM and DARM both on IR signals!!!!!!!!! [EricQ, Jenne] We're still working, but I'm really excited, so here's our news:       9795   Thu Apr 10 16:09:29 2014 Steve Update VAC RGA scan at 75% pumping speed                                9794   Thu Apr 10 10:52:15 2014 manasa Summary IOO MC2_TRANS path in WFS servo                                9793   Thu Apr 10 01:56:05 2014 Jenne Update LSC CARM transitioned to IR error signals! [Jenne, EricQ] This      9792   Wed Apr 9 16:08:33 2014 Jenne Update LSC CARM loop gains vs. CARM offset I have taken EricQ's simulation results for the CARM plant change vs.  CARM offset, and put that together with the CM and CARM  8x    9791   Wed Apr 9 02:34:20 2014 Jenne Update LSC Jumping over the CARM resonance point Koji was right, and I was using much too large of a CARM offset.       9790   Tue Apr 8 23:04:14 2014 manasa Update LSC arm length measurements                                9789   Tue Apr 8 19:10:39 2014 rana Update LSC arm length measurements  Since we don't have an arm length precision measurement (i.e. better than centimeters), why not just do as Koji suggests and use      9788   Tue Apr 8 10:44:53 2014 Koji Update LSC Playing with PRMI + 2 arms I vaguely remember that the ALS count (Phase Tracker output) is converted to Hz@532nm by a factor  ~20kHz/cnt.      9787   Tue Apr 8 01:58:53 2014 Jenne Update LSC Playing with PRMI + 2 arms I played around with the PRMI + 2 arms situation again this evening.  (I'm not ready to call it "PRFPMI" until      9786   Mon Apr 7 15:26:32 2014 jamie, ericq Update CDS aborted attempt to update c1sus machine with second CPU This morning we attempted to replace the c1sus front end machine with a spare that had been given a second CPU, and therefore      9785   Fri Apr 4 18:51:29 2014 ericq Summary LSC MORE CARM related modeling In today's ISC call, Kiwamu was comparing two ways to approach resonance:      "C-Type": The  9x    9784   Thu Apr 3 18:55:10 2014 ericq Summary LSC Some CARM related modeling  The other day, Jenne and I were comparing my MIST simulation to her Optickle simulation for the CARM transfer functions I posted      9783   Thu Apr 3 18:09:54 2014 ericq Update LSC Attempt at PRMI+2 arms So, here's the basic: "We reduced the CARM offset and saw more TRY" plot.       9782   Thu Apr 3 17:05:52 2014 Steve Update VAC Maglev controller swapped                                9781   Thu Apr 3 03:06:34 2014 Jenne Update LSC Attempt at PRMI+2 arms [EricQ, Jenne] Much more success later!  We've had the arms locked on ALS      9780   Thu Apr 3 00:30:52 2014 Jenne Update LSC Attempt at PRMI+2 arms [EricQ, Jenne] We started out this evening by locking the PRMI, on different REFL PDs,      9779   Wed Apr 2 23:08:51 2014 Koji Summary ASC New PRM ASC is running The new PRM ASC design Pitch FM1: zero at 0Hz, pole at 2000Hz,      9778   Wed Apr 2 20:13:04 2014 Jenne Update PEM More Chile EQs 2 more earthquakes in Chile:  a M6.4 and a M7.8.  We got them about 15 minutes ago      9777   Wed Apr 2 19:50:12 2014 Koji Summary ASC New PRM ASC is running As the designed ASC filters in this entry had too little phase margins (~10deg), I had to compromise the servo design.      9776   Wed Apr 2 16:34:15 2014 Steve Update VAC Maglev controller needs service                                9775   Wed Apr 2 09:31:22 2014 Steve Update PEM local 3.0M earthquake                                9774   Wed Apr 2 01:18:30 2014 Jenne Update LSC Attempt at PRMI+2 arms I was trying to lock PRMI+2 arms, but I'm losing patience with the MC losing lock.  It's mostly well-behaved, but every now and      9773   Tue Apr 1 22:03:44 2014 Koji Summary ASC New PRM ASC is running [Koji Jenne] New PRM ASC was implemented. [to be cnt'd]      9772   Tue Apr 1 21:45:01 2014 Jenne Summary LSC PRM violin notch not at correct freq? Koji and I have the PRMI locked right now, and we hear a very strong violin mode ringing up, at 628Hz.  This is, according to      9771   Tue Apr 1 20:56:27 2014 Jenne Update PEM No noticeable effect from Chile's M8.2 earthquake Koji locked the MC, arms, and PRMI, with no troubles, after the M8.2 earthquake off the coast of Chile, that happened about 4      9770   Tue Apr 1 17:37:57 2014 Evan Update Computer Scripts / Programs Comsol 4.4 upgrade Comsol 4.4 is now installed under /cvs/cds/caltech/apps/linux64/COMSOL44.  I've left the other installations alone.      9769   Mon Mar 31 23:57:22 2014 Koji Summary ASC PRM ASC characterization / design A series of measurements / calculations for the PRM ASC characterization and servo design  7x    9768   Mon Mar 31 21:23:30 2014 Gabriele Summary LSC MICH sensing oddities in REFL 3F                                9767   Mon Mar 31 17:47:57 2014 ericq Summary LSC MICH sensing oddities in REFL 3F Last week, while I had the PRMI locked on REFL33, I did some poking around with mirror excitation to RFPD quadrature transfer      9766   Mon Mar 31 13:26:23 2014 manasa Update LSC LSC model modified I have included Yarm CESAR to the LSC model. It was just a copy paste of the Xarm CESAR. Since we are now meditating about implementing      9765   Mon Mar 31 13:15:55 2014 manasa Summary LSC Alignment update                                9764   Mon Mar 31 11:34:00 2014 manasa Summary IOO MC2 moved                                9763   Mon Mar 31 08:11:00 2014 Steve Update SUS recovery from earthquakes                                9762   Sat Mar 29 00:11:39 2014 Koji Configuration General NTP setting on nodus FB: /etc/ntp.conf was updated as below such that it refers nodus and also caltech server when nodus is not available      9761   Fri Mar 28 23:28:13 2014 Koji Configuration General NTP setting on nodus [Koji Rana] We are looking at NTP settings. I looked at nodus.      9760   Fri Mar 28 22:10:00 2014 rana, koji Update SUS recovery from * EQ Southeast of LA around 45 minutes ago. Callum and I felt it.      9759   Fri Mar 28 20:23:02 2014 rana Summary IOO MC2 moved I aligned MC2 suspension by 0.01 in pit and yaw to align the MC better to the PSL beam. Then I turned the WFS back on. The

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