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ID Date Author Typeup Category Subject Text Attachments
  11032   Sat Feb 14 22:14:02 2015 KojiSummaryLSC[HOW TO] 3f modulation cancellationWhen I finished my measurements, the modulation
setup was reverted to the conventional one.
If someone wants to use the 3f cancellation
 freq_gen_box.JPGdelay_line.JPGcable_spec.pdf 
  11033   Sun Feb 15 16:20:44 2015 KojiSummaryLSC[ELOG LIST] 3f modulation cancellationSummary
of the ELOGS

3f
modulation cancellation theory 
  
  11034   Sun Feb 15 20:55:48 2015 ranaSummaryLSC[ELOG LIST] 3f modulation cancellationI wonder if DRMI can be locked on 3f using
this lower 55 MHz modulation depth. It seems
that PRMI should be unaffected, but that
  
  11035   Mon Feb 16 00:08:44 2015 KojiSummaryLSC[ELOG LIST] 3f modulation cancellationThis KTP crystal has the maximum allowed
RF power of 10W (=32Vpk) and V_pi = 230V.
This corresponds to the maximum allowed
  
  11036   Mon Feb 16 01:45:12 2015 KojiSummaryLSCmodulation depth analysisBased on the measured modulation profiles,
the depth of each modulation was estimated.
Least square sum minimization of the
 modulation_nominal.pdfmodulation_3f_reduced.pdf 
  11106   Fri Mar 6 00:59:13 2015 ranaSummaryIOOMC alignment not drifting; PSL beam is driftingIn the attached plot you can see that the
MC REFL fluctuations started getting larger
on Feb 24 just after midnight. Its been bad
 MCdrfit.png 
  11109   Fri Mar 6 13:48:17 2015 dark kiwamuSummaryIOOtriple resonance circuitI was asked by Koji to point out where
a
schematic of the triple resonant circuit
  
  11112   Fri Mar 6 19:54:15 2015 ranaSummaryIOOMC alignment not drifting; PSL beam is driftingMC Refl
alignment follow up: the alignment from last
 Untitled.png 
  11134   Wed Mar 11 19:15:03 2015 KojiSummaryLSCROUGH calibration of the darm spectrum during the full PRFPMI lockI made very rough calibration of
the DARM spectra before and after the transition
for the second lock on Mar 8.
 150308_DARM_ROUGH_CALIB.pdf 
  11147   Thu Mar 19 16:58:19 2015 SteveSummaryIOOMC alignment not drifting; PSL beam is driftingPolaris mounts ordered.




 driftingInputBeam2.jpg 
  11148   Thu Mar 19 17:11:32 2015 steveSummarySUSoplev laser summary updated          
March  19, 2015   2 
new  JDSU 1103P, sn P919645 & P919639
  
  11149   Fri Mar 20 10:51:09 2015 SteveSummaryIOOMC alignment not drifting; PSL beam is driftingAre the two  visible small srews holding
the adapter plate only?

If yes, it is the weakest point
 eom4.jpgeom3.jpg 
  11158   Mon Mar 23 09:42:29 2015 SteveSummaryIOO4" PSL beam path postsTo achive the same beam height each components
needs their specific post height.

 .75odSSpost.pdfMC_mml_trans_clamp.jpgPMCmmLn.jpg 
  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 
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