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ID Date Author Type Category Subject Text   11892   Fri Dec 18 17:37:04 2015 rana Update LSC Uncooperative AUX X Here's how we should diagnose the EX laser: Compare IR RIN of laser      11891   Thu Dec 17 16:44:03 2015 gautam Update CDS ALS Slow control MEDM screen updated      11890   Thu Dec 17 14:02:05 2015 gautam Update CDS IPC channels for beat frequency control set up I've set up two IPC channels that take the output from the digital frequency counters and send them to the end front-ends (via      11889   Thu Dec 17 01:55:16 2015 ericq Update LSC Uncooperative AUX X [ericq, Gautam] We were not able to fix the excess frequency noise of the AUX X laser by the      11888   Wed Dec 16 23:15:28 2015 ericq Update Green Locking Green beat channels temporarily set up as IR beat channels With the IR beats going to the nominal ALS channels as Gautam left them, we're able to measure the free running frequency      11887   Wed Dec 16 18:34:40 2015 gautam Update Green Locking Green beat channels temporarily set up as IR beat channels Since there are a few hours to go before the locking efforts tonight, I've temporarily borrowed      11886   Wed Dec 16 10:56:22 2015 gautam Update CDS hard reboot of FB [ericq,gautam] Forgot to submit this yesterday... While we were trying to get the      11885   Wed Dec 16 10:22:14 2015 Steve Update IOO this morning c1sus and c1ioo were restarted. PMC locked.        11884   Tue Dec 15 18:08:22 2015 Max Isi Update General Summary archive cleaning cron job I have added a new cron job in pcdev1 at CIT using the 40m shared account. This will run the /home/40m/DetectorChar/bin/cleanarchive      11883   Tue Dec 15 11:22:53 2015 gautam Update CDS c1scx and c1asx crashed I noticed what I thought was excessive movement of the beam spot on ITMX and ETMX on the control room monitors, and when      11882   Mon Dec 14 23:56:29 2015 ericq Update CDS c1pem reverted To get C1PEM data back into the frames, I removed the new BLRMS blocks, recompiled, reinstalled, re-enabled it in daqd, restarted.      11881   Mon Dec 14 23:49:03 2015 ericq Update Optical Levers Calibration of oplevs for ITMX/ETMX      11880   Mon Dec 14 16:46:42 2015 ericq Update WienerFiltering Noise Subtraction Puzzler Here's something to ponder. Our online MCL feedforward uses perpendicular vertex T240 seismometer signals      11879   Mon Dec 14 16:27:11 2015 gautam Update Green Locking Y-end AUX PDH noise breakdown Summary: I've attached the results from my measurements      11878   Mon Dec 14 14:08:49 2015 Steve Update SUS Ruby wire standoffs update Two companies are willing to  make the ruby grooves and the third one is still working on their quote.      11877   Sun Dec 13 21:55:28 2015 gautam Update Green Locking Y end laser (Lightwave) PZT calibration Summary: After the discussions at the Wednesday meeting,      11876   Fri Dec 11 23:12:09 2015 Koji Summary COC Loss map measurement document Yutaro left detailed slides for his loss map measurement https://dcc.ligo.org/LIGO-G1501547      11875   Fri Dec 11 16:16:36 2015 yutaro Update Optical Levers Calibration of oplevs for ITMX/ETMX Based on calibration measurement I have done (elog 11785, 11831), I      11874   Fri Dec 11 15:37:50 2015 yutaro Update LSC Power recycling gain estimation from arm loss measurement Attached is the plot of relation between the average arm round trip loss and power recycling gain. 2 % loss due to PR3      11873   Fri Dec 11 13:28:36 2015 Koji Update LSC Power recycling gain estimation from arm loss measurement Can I ask you to make a plot of the power recycling gain as a function of the average arm loss, indicating the current loss value?      11872   Fri Dec 11 09:35:44 2015 yutaro Update LSC Power recycling gain estimation from arm loss measurement I took PR3 AR reflectivity and calculated PRG (PR3 is flipped and so AR surface is inside PRC).      11871   Thu Dec 10 19:53:22 2015 yutaro Update LSC strange behavior of ASDC To check if the strange behavior of ASDC is caused by SR2/SR3 or not, I did the following measurement:      11870   Thu Dec 10 12:33:04 2015 yutaro Update LSC strange behavior of ASDC I did additional tests for the strange behavior of ASCD. ETMY, ETMX and ITMY were misaligned so that only light reflected by      11869   Wed Dec 9 23:16:13 2015 rana Update Computer Scripts / Programs Nodus security NDS2 and the usual ports so that we can use optimus as a comsol server.      11868   Wed Dec 9 19:01:45 2015 jamie Update CDS back to fb1 I spent this afternoon trying to debug fb1, with very little to show for it.  We're back to running from fb.      11867   Wed Dec 9 18:45:58 2015 Koji Summary General Network Topology Check [Eric Q, Gautam, Koji] We went through the network connections to produce the mapping of the instruments.      11866   Wed Dec 9 11:25:55 2015 Steve Update VAC normal RGA scan at day 435-436 Glitches are gone. Rga scan is good        11865   Tue Dec 8 23:24:08 2015 gautam Update Green Locking Y end laser (Lightwave) PZT calibration Summary: I measured the PZT actuator gain for the Lightwave      11864   Tue Dec 8 15:57:16 2015 yutaro Summary LSC Power recycling gain estimation from arm loss measurement I estimated power recycling gain with the results of arm loss measurement. From elog      11863   Tue Dec 8 15:40:48 2015 Steve Update VAC glitchy RGA scan at day 434 The noise floor of the Rga scan is glitching less today        11862   Tue Dec 8 15:18:29 2015 ericq Update Computer Scripts / Programs Nodus security I've done a couple things to try and make nodus a little more secure. Some have worried that nodus may be susceptible to      11861   Tue Dec 8 11:24:45 2015 yutaro Summary Computer Scripts / Programs Scripts for loss map measurement Here I explain usage of my scripts for loss map measurement. There are 7 script files in a same directory /opt/rtcds/caltech/c1/scripts/lossmap_scripts. With      11860   Mon Dec 7 15:56:35 2015 yutaro Update LSC XARM lock with ITMX actuated and related change on ASS I changed the snapshot file for ASS, /opt/rtcds/caltech/c1/scripts/ASS_DITHER_ON.snap as follows:      11859   Mon Dec 7 11:25:10 2015 jamie Update CDS daqd is mad      11858   Mon Dec 7 11:17:51 2015 Steve Update VAC noisy RGA scan at day 433        11857   Mon Dec 7 11:11:25 2015 yutaro Summary LSC round trip loss of X arm On the day before yesterday and in this morning, I measured loss map of ETMX. I reported the method I used to change the beam spot      11856   Mon Dec 7 10:45:21 2015 ericq Update CDS daqd is mad Since removing c1pem from the daqd master file, daqd has not crashed. I suppose we're running into the stability issue that motivated      11855   Mon Dec 7 10:40:09 2015 yutaro Update Computer Scripts / Programs Added 1 line to UNFREEZE_DITHER.py I added 1 line to one of the ASS scripts, UNFREEZE_DITHER.py like this: L29>   ez.cawrite('C1:ASS-'+dof+'_GAIN',      11854   Mon Dec 7 00:45:28 2015 ericq Update CDS daqd is mad I glanced at the summary pages and noticed that, since Friday around when we first loaded up the new BLRMS parts, daqd has crashing      11853   Sat Dec 5 21:57:32 2015 yutaro HowTo Cameras When image capture does not work... I don't know if just running "modprobe" will work or not, because I didn't try it...  When the same problem happens      11852   Sat Dec 5 21:28:33 2015 Koji HowTo Cameras When image capture does not work... Do we need "make" everytime? Do you mean just running "modprobe" didn't work?      11851   Sat Dec 5 12:02:25 2015 yutaro HowTo Cameras When image capture does not work... Today image capture did not work again, though it had worked 3 days before. I also found that red indicator light on the      11850   Fri Dec 4 23:02:13 2015 yutaro Update LSC Beam on POX11 is possibly not centered well [yutaro, Koji] Now, the beam on POX11 PD is well centered and well focused.      11849   Fri Dec 4 18:20:36 2015 gautam Update CDS BLRMS for IMC setup [ericq, gautam] BLRMS filters have been set up for the coil outputs and      11848   Fri Dec 4 13:12:41 2015 ericq Update CDS c1ioo Timing Overruns Solved I had noticed for a while that the c1ioo frontend model had much higher variability than any of the other other 16k models, and      11847   Fri Dec 4 12:33:52 2015 yutaro Update LSC Beam on POX11 is possibly not centered well To focus POX beam on POX11 PD, I added an iris and a lens before POX11 PD as you can see in Attachment 1.      11846   Fri Dec 4 10:18:33 2015 yutaro Update ASS Offset in the dither loop of XARM vs beam spot shift on ETMX As I did for YARM (elog 11779), I measured the relation between offsets added just after the demodulation      11845   Thu Dec 3 19:10:28 2015 yutaro Update LSC XARM lock with ITMX actuated and related change on ASS To avoid the strange kicking of ETMX, I locked XARM with ITMX actuated instead of ETMX so that I changed elements of C1LSC_OUTPUT_MTRX;      11844   Thu Dec 3 18:18:48 2015 gautam Update CDS BLRMS for optics suspensions - library block In order to be consistent with the naming conventions for the new BLRMS filters, I made a library block that takes all the input      11843   Thu Dec 3 10:05:07 2015 yutaro Update Optical Levers Calibration of oplevs for ITMX/ETMX I updated the figures. I think it's easier to read now.

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