40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log, Page 288 of 341  Not logged in ELOG logo
ID Date Author Typedown Category Subject Text Attachments
  11171   Wed Mar 25 18:27:34 2015 KojiSummaryGeneralSome maintainance- I found that the cable for the AS55 LO
signal had the shielding 90% broken. It was
fixed.
  
  11173   Wed Mar 25 18:48:11 2015 KojiSummaryLSC55MHz demodulators inspection[Koji Den EricG]

We inspected the {REFL, AS, POP}55
demodulators.
  
  11180   Fri Mar 27 20:32:17 2015 KojiSummaryLSCLocking activity- Adjutsed the IMC WFS operating point.
The IMC refl is 0.42-0.43.

- The arms are aligned with ASS
  
  11235   Wed Apr 22 11:48:30 2015 manasaSummaryGeneralDelay line frequency discriminator for FOL error signalSince the Frequency counters have not been
a reliable error signal for FOL PID loop,
we will put together an analog delay line
  
  11236   Wed Apr 22 14:56:18 2015 manasaSummaryGeneralDelay line frequency discriminator for FOL error signal[Koji, Manasa]

Since the bandwidth of the fiber
PD is ~ 1GHz, we could design the frequency
  
  11245   Fri Apr 24 21:31:20 2015 KojiSummaryCDSautomatic mxstream resettingWe were too much annoyed by frequent stall
of mxstream. We'll update the RCG when
time comes (not too much future).
  
  11252   Sun Apr 26 00:56:21 2015 ranaSummaryComputer Scripts / Programsproblems with new restart procedures for elogd and apacheSince the nodus upgrade, Eric/Diego changed
the old csh restart procedures to be more
UNIX standard. The instructions are in the
  
  11267   Fri May 1 20:33:31 2015 ranaSummaryComputer Scripts / Programsproblems with new restart procedures for elogd and apacheSame thing again today. So I renamed the   
  11268   Sun May 3 01:04:19 2015 ranaSummaryPEMSeismo signals are badhttps://ldas-jobs.ligo.caltech.edu/~max.isi/summary/day/20150502/pem/seismic/

Looks like some of our seismometers
are oscillating, not mounted well, or something
  
  11270   Mon May 4 10:21:09 2015 manasaSummaryGeneralDelay line frequency discriminator for FOL error signalAttached is the schematic of the analog
DFD and the plot showing the zero-crossing
for a delay line length of 27cm. The bandwidth
 DFD.pngDFD_resp.png 
  11272   Mon May 4 12:42:34 2015 manasaSummaryGeneralDelay line frequency discriminator for FOL error signalKoji suggested that I make a cosine fit
for the curve instead of a linear
fit.
 DFD_cosfit.png 
  11300   Mon May 18 14:46:20 2015 manasaSummaryGeneralDelay line frequency discriminator for FOL error signalMeasuring the voltage noise
and frequency response of the Analog Delay-line
Frequency Discriminator (DFD)
 DFDnoise.pngDFDnoise_AC.pngFreqResp.pngDFD.zip 
  11368   Mon Jun 22 12:57:09 2015 ericqSummaryLSCX/Y green beat mode overlap measurement redoneI took measurements at the green beat setup
on the PSL table, and found that our power
/ mode overlap situation is still consistent
  
  11370   Mon Jun 22 14:53:37 2015 ranaSummaryLSCX/Y green beat mode overlap measurement redone
Why is there a factor of 20 power
difference? Some of it is the IR laser power
difference, but I thought that was just a
  
  11384   Tue Jun 30 11:33:00 2015 JamieSummaryCDSprepping for CDS upgradeThis is going to be a big one.  We're
at version 2.5 and we're going to go
to 2.9.3.
  
  11390   Wed Jul 1 19:16:21 2015 JamieSummaryCDSCDS upgrade in progressThe CDS upgrade is now underway

Here's
what's happened so far:


Installed and linked in
  
  11392   Tue Jul 7 17:22:16 2015 JessicaSummary Time Delay in ALS CablesI measured the transfer functions in the
delay line cables, and then calculated the
time delay from that.
 cableA_fit.jpgcableA_resid.jpgcableB_fit.jpgcableB_resid.jpg 
  11393   Tue Jul 7 18:27:54 2015 JamieSummaryCDSCDS upgrade: progress!After a couple of days of struggle, I made
some progress on the CDS upgrade today:

 2.9-RTS-OK.pngC1X04_GDS_TP.png 
  11395   Wed Jul 8 17:46:20 2015 JessicaSummaryGeneralUpdated Time Delay PlotsI re-measured the transfer function for
Cable B, because the residuals in my previous
post for cable B indicated a bad fit. 
 resid_CableA.pngresid_CableB.png 
  11396   Wed Jul 8 20:37:02 2015 JamieSummaryCDSCDS upgrade: one step forward, two steps backAfter determining yesterday that all the
daqd issues were coming from the frame writing,
I started to dig into it more today. 
  
  11397   Wed Jul 8 21:02:02 2015 JamieSummaryCDSCDS upgrade: another step forward, so we're back to where we started (plus a bit?)Koji did a bit of googling to determine
that 'Wrong Network' status message
could be explained by the fb myrinet 
  
  11398   Thu Jul 9 13:26:47 2015 JamieSummaryCDSCDS upgrade: new mx 1.2.16 installedI rebuilt/installed mx 1.2.16 to use "ether-mode",
instead of the default MX-10G:


controls@fb
  
  11400   Thu Jul 9 16:50:13 2015 JamieSummaryCDSCDS upgrade: if all else fails try throwing metal at the problemI roped Rolf into coming over and adding
his eyes to the problem.  After much
discussion we couldn't come up with any
  
  11402   Mon Jul 13 01:11:14 2015 JamieSummaryCDSCDS upgrade: current assessmentdaqd is still behaving unstably. 
It's still unclear what the issue is.

The current failures look like
  
  11404   Mon Jul 13 18:12:50 2015 JamieSummaryCDSCDS upgrade: left running in semi-stable configurationI have been watching daqd all day and I
don't feel particularly closer to understanding
what the issues are.  However, things
  
  11406   Tue Jul 14 09:08:37 2015 JamieSummaryCDSCDS upgrade: left running in semi-stable configurationOvernight daqd restarted itself only about
twice an hour, which is an improvement:


controls@fb /opt/rtcds/caltech/c1/target/fb
  
  11408   Tue Jul 14 10:28:02 2015 ericqSummaryCDSCDS upgrade: left running in semi-stable configurationThere remains a pattern to some of the
restarts, the following times are all
reported as restart times. (There are others
  
  11409   Tue Jul 14 11:57:27 2015 jamieSummaryCDSCDS upgrade: left running in semi-stable configuration


  
  11412   Tue Jul 14 16:51:01 2015 JamieSummaryCDSCDS upgrade: problem is not disk accessI think I have now determined once and
for all that the daqd problems are NOT due
to disk IO contention.
  
  11414   Tue Jul 14 17:14:23 2015 EveSummarySummary PagesFuture summary pages improvementsHere is a list of suggested improvements
to the summary pages. Let me know if there's
something you'd like for me to add to
  
  11415   Wed Jul 15 13:19:14 2015 JamieSummaryCDSCDS upgrade: reducing mx end-points as last ditch effortI tried one last thing, suggested by Keith
and Gerrit.  I tried reducing the number
of mx end-points on fb to zero, which should
  
  11417   Wed Jul 15 18:19:12 2015 JamieSummaryCDSCDS upgrade: tentative stabilty?Keith Thorne provided his eyes on the situation
today and had some suggestions that might
have helped things
  
  11427   Sat Jul 18 15:37:19 2015 JamieSummaryCDSCDS upgrade: current statusSo it appears we have found a semi-stable
configuration for the DAQ system post upgrade:

 cds-good.pngsus-damped.png 
  11437   Wed Jul 22 22:06:42 2015 EveSummarySummary PagesFuture summary pages improvements- CDS Tab

We want to monitor the status of the
  
  11441   Thu Jul 23 20:57:15 2015 JessicaSummaryGeneralApplying Pre-filter to data before IIR Wiener FilteringI updated my bandpass filter and have  BodePlot.pngacc_bandpass.pngmcl_seis.png 
  11456   Tue Jul 28 20:42:50 2015 JessicaSummaryGeneralNew Seismometer Data CoherenceI was looking at the new seismometer data
and plotted the coherence between the different
arms of 
 Coherence1.pngCoherence2.png 
  11457   Wed Jul 29 10:34:42 2015 IgnacioSummaryLSCCoherence of arms and seismometersJessica and I took 45 mins  (  8x 
  11458   Wed Jul 29 11:15:21 2015 JessicaSummaryLSCPSDs of Arms with seismometer subtractionIgnacio and I downloaded data from the
STS, GUR1, and GUR2 seismometers and from
the mode cleaner and the x and y arms. The
 Arms_PSD.pngXArm_PSD.pngYArm_PSD.png 
  11461   Wed Jul 29 21:40:39 2015 KojiSummaryCDSStatus of the frame data syncingThe trend data hasn't been
synced with LDAS since Jul 27 5AM local.

40m:
  
  11465   Thu Jul 30 11:47:54 2015 KojiSummaryCDSStatus of the frame data syncingToday it was synced at 5AM but
that was all.

40m:
  
  11502   Thu Aug 13 12:06:39 2015 Jessica SummaryIOOBetter predicted subtraction did not work as well OnlineYesterday I adjusted the preweighting of
my IIR fit to the transfer function of MC2,
and also managed to reduce the number of
 6x 
  11509   Fri Aug 14 23:49:34 2015 KojiSummaryGeneralB&K Shaker fixedI fixed a shaker that was claimed to be
broken. I had to cut the rubber membrane
to open the head.
 IMG_1947.JPG 
  11524   Sat Aug 22 15:48:32 2015 KojiSummaryLSCArm locking recoveryAs per Ignacio's request, I restored
the arm locking.

- MC WFS relief
  
  11551   Tue Sep 1 02:44:44 2015 KojiSummaryCDSc1oaf, c1mcs modified for the IMC angular FF[Koji, Ignacio]

In order to allow us to work on
the IMC angular FF, we made the signal paths
 c1oaf_screenshot1.pngc1oaf_screenshot2.pngc1mcs_screenshot.pngOAF_MEDM1.pngOAF_MEDM2.png 
  11569   Thu Sep 3 19:52:24 2015 ranaSummarySUSSUS drift monitorSince Andrey's SUS Drift mon screen
back in 2007, we've had several versions
which used different schemes and programming
 07.png 
  11590   Thu Sep 10 09:37:34 2015 IgnacioSummaryIOOFilters left on MCL static moduleThe following MCL filters
were left loaded in the T240-X and T240-Y
  
  11597   Tue Sep 15 01:14:10 2015 ranaSummaryLSCneed to check LSC Whitening switch logic ... againTonight we noticed that the REFL_DC signal
has gone bipolar, even though the whitening
gain is 0 dB and the whitening filter is
  
  11598   Tue Sep 15 15:01:23 2015 ranaSummaryLSCdisabling the LSC AA filters + mod to whiteningWhile investigating the BIO situation with
the LSC machine and the iscaux2 processor
last night, we wondered if maybe the Anti-Aliasing
  
  11599   Tue Sep 15 15:10:48 2015 gautam, ericq, ranaSummaryLSCPRFPMI lock & various to-do's[SIZE=3]I was observing Eric while he was
attempting to lock the PRFPMI last night.
The handoff from ALS to LSC was not very
 powerSpec0915.pdf 
  11601   Tue Sep 15 18:35:21 2015 ericqSummaryLSCsome further notesAbout the analog CARM control with ALS:

We're looking at using a Sigg
designed remotely switchable delay line box
  
ELOG V3.1.3-