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ID Date Author Type Category Subjectup Text Attachments
  1309   Mon Feb 16 14:12:21 2009 YoichiUpdateLSCFE system rebooted[quote]
I can't restart the MC autolocker on c1susvme2
because it doesn't let me ssh in. I tried
  
  15998   Tue Apr 6 11:13:01 2021 JonUpdateCDSFE testingI/O chassis assembly

Yesterday
I installed all the available ADC/DAC/BIO
modules and adapter boards into the new I/O
  
  1038   Fri Oct 10 00:34:52 2008 robOmnistructureComputersFEs are down
The front-end machines are all down.  Another
cosmic-ray in the RFM, I suppose.  Whoever
  
  1039   Fri Oct 10 10:20:42 2008 AlbertoOmnistructureComputersFEs are down[quote]
The front-end machines are all down.  Another
cosmic-ray in the RFM, I suppose.  Whoever
  
  13385   Tue Oct 17 23:07:52 2017 gautamUpdateCDSFEs unresponsiveWhile working on the IFO tonight, I noticed
that the blinky status lights on c1iscex
and c1iscey were frozen (but those on the
  
  13386   Wed Oct 18 01:41:32 2017 jamieUpdateCDSFEs unresponsive


  
  13387   Wed Oct 18 02:09:32 2017 gautamUpdateCDSFEs unresponsiveI was looking at the ASDC channel on dataviewer,
and toggling various settings like whitening
gain. At some point, the signal just froze.
  
  13388   Wed Oct 18 09:21:22 2017 jamieUpdateCDSFEs unresponsive


  
  13394   Wed Oct 18 23:11:53 2017 gautamUpdateCDSFEs unresponsiveThis happened again just now - it was roughly
this time when this happened last night as
well.
  
  13124   Wed Jul 19 00:59:47 2017 gautamUpdateGeneralFINESSE model of DRMI (no arms)Summary:

I've
been working on improving the 40m FINESSE
model I set up sometime last year (where
 DRMI_sensingMat.pdfDRMI_errSigs.pdf40m_DRMI_FINESSE.zipDRMI_sensingMat_19Jul.pdf 
  10226   Thu Jul 17 02:57:32 2014 AndresUpdate40m Xend Table upgradeFInish Calculation on Current X-arm mode MatchingData and Calculation for the
Xarm Current Mode Matching
 RawDataForTheModeGreenScan.pngResultForModeMatching.pngDataAndCalculationOfModeMismatch.zip 
  10237   Fri Jul 18 16:52:56 2014 AndresUpdate40m Xend Table upgradeFInish Calculation on Current X-arm mode Matching

    

       
            
 OldAndNewSetupPlotsOfDisplacementAndAngleAtTheETM.pngOldSetUpDisplacementAndNewSetup.m.zip 
  1498   Mon Apr 20 05:18:42 2009 YoichiConfigurationLockingFM6 and FM10 of LSC-MC were restoredDuring tonight's locking work, I realized
that FM6 and FM10 (both resonant gains around
20Hz) were actually activated by cm_step.
  
  10273   Fri Jul 25 17:28:31 2014 HarryUpdateGeneralFOL Box and PER Update Purpose
We're putting together a box to go
into the 1X2 rack, to facilitate the frequency
 FOLBox.png 
  10376   Wed Aug 13 16:12:55 2014 HarryUpdateGeneralFOL Layout DiagramPer Q's request, I've made up a diagram
of the complete FOL layout for general reference.
 FOLLayout2.png 
  10352   Fri Aug 8 14:27:18 2014 AkhilUpdateComputer Scripts / ProgramsFOL Scripts The scripts written for interfacing
the FC with R Pi, building EPICS database,
piping data into EPICS channels,PID loop
  
  11102   Thu Mar 5 12:27:27 2015 manasaUpdateGeneralFOL fiber box on the PSL tableWorking
around the PSL table

I have put the FOL
  
  11650   Tue Sep 29 19:38:09 2015 gautamUpdateGeneralFOL fiber box revampThe new 2x2 fiber couplers arrived today
so Eric gave me an overview on the changes
to be made to the existing configuration
 IMG_0017.JPGFOL_schematic.pdfIMG_0018.JPGIMG_0016.JPG 
  11652   Wed Sep 30 13:07:13 2015 gautamUpdateGeneralFOL fiber box revampEric pointed out that the 1x2 couplers
that were used in the previous arrangement
and which I recycled, were in fact NOT
 FOL_schematic.pdf 
  11670   Tue Oct 6 16:56:40 2015 gautamUpdateGeneralFOL fiber box revamp[gautam, ericq]

We had a look at the IR beat (PSL+Xarm)
today using the new FOL fiber box, and compared
 20151006_Xbeat_psd.pdf20151006_Xbeat_coherence.pdf 
  11110   Fri Mar 6 14:29:59 2015 manasaUpdateGeneralFOL troubleshooting[EricQ, Manasa]

Domenica:
Since Domenica
  
  11123   Mon Mar 9 14:43:31 2015 manasaUpdateGeneralFOL troubleshootingFiguring out the problem with
frequency counter readouts:

 FOL_trouble.pdfIMAG0341.jpgIMAG0342.jpg 
  11128   Tue Mar 10 17:48:07 2015 manasaUpdateGeneralFOL troubleshooting[Koji, Manasa]

This problem was solved by changing
the Frequency Counter range settings.
  
  11135   Wed Mar 11 19:48:25 2015 KojiUpdateGeneralFOL troubleshootingThere is a frequency counter code written
by the summer student.
The code needed some cleaning up.
  
  11137   Thu Mar 12 11:57:38 2015 KojiUpdateGeneralFOL troubleshootingBTW, during this trouble shoot, we looked
at the IR beatnote spectrum between the Xend
and the PSL.
  
  835   Thu Aug 14 15:51:35 2008 josephbSummaryCamerasFOUND! The Missing Standoff!We used a zoom lens on the GC750 to take this
picture of the standoff while inside a plastic
rubber-glove bag.  The standoff with bag
 standoff.png 
  4180   Thu Jan 20 22:17:12 2011 ranaSummaryLSCFPMI Displacement NoiseI found this old plot in an old elog entry
of Osamu's (original
link).
 osamu-1140657006.pdf 
  17089   Thu Aug 18 14:49:35 2022 YehonathanSummaryLSCFPMI Sensitivity{Yuta, Yehonathan}

We wrote a notebook found on Git/40m/measurements/LSC/FPMI/NoiseBudget/FPMISensitivity.ipynb
for calculating the MICH, DARM (currently
 Sensitivity_Plot_1344133503.pdf 
  17091   Thu Aug 18 18:10:49 2022 KojiSummaryLSCFPMI SensitivityThe overlapping plot of the calibrated
error and control signals gives you an approximately
good estimation of the freerun fluctuation,
  
  6914   Wed Jul 4 21:11:53 2012 yutaUpdateLockingFPMI in vacuum is backI aligned FPMI and greens. There's no recognizable
difference between before and after the vent.
 ALL_1025495266.pngMEDMscreenshotswithCOW_20120704.png 
  8170   Tue Feb 26 11:55:11 2013 ManasaUpdateLockingFPMI locked [Yuta, Manasa]

FPMI locked.
  
  8171   Tue Feb 26 15:32:47 2013 JenneUpdateLockingFPMI locked

    

       
            
  
  9157   Tue Sep 24 22:19:57 2013 ManasaUpdateGeneralFPMI locked [Masayuki, Manasa]
We locked FPMI and measured the FPMI
noise (power spectrum of error signal - MICH_IN1)
  
  7240   Tue Aug 21 01:54:09 2012 JenneUpdateLockingFPMI locked - arms locked with IRI (for the first time personally) locked
the FPMI.  I have data for the POX11I,
POY11I, AS55Q error signals for each arm
  
  14926   Wed Oct 2 23:15:02 2019 gautamUpdateLSCFPMI lockingSummary:

I was able to lock the FPMI. The
lock was quite stable. However,
 FPMIlocked.png 
  17012   Mon Jul 18 16:39:07 2022 PacoSummaryLSCFPMI locking procedure using REFL55 and AS55[Yuta, Paco]

In summary, we locked FPMI using
REFL55_I, REFL55_Q, and AS55_Q. The key to
 DARM_07_18_2022_FMPI.pdfCARM_07_18_2022_FPMI.pdfMICH_07_18_2022_FPMI.pdffpmi_darm_nb_2022_07.pdf 
  17016   Mon Jul 18 21:41:42 2022 AnchalSummaryLSCFPMI locking procedure using REFL55 and AS55Now that you have found a working configuration,
I suggest we update CARM and DARM filter
banks so that they are used in locking those
  
  17069   Tue Aug 9 19:54:31 2022 yutaSummaryLSCFPMI locking tonight[Tega, Anchal, Yuta]

We resored FPMI locking settings.
  
  9161   Wed Sep 25 23:15:11 2013 MasayukiSummaryGreen LockingFPMI noise caused by ARM lockingI measured some error signal, OLTFs and
responses for FPMI noise estimation. Especially
we are interested in the noise from in-loop
 fpmibd.pdf 
  9162   Wed Sep 25 23:59:29 2013 MasayukiSummaryGreen LockingFPMI noise caused by ARM locking 
Measurement
 XARM_OLTF.pdfYARM_OLTF.pdfXARM_ITMXresponse.pngYARM_ITMYresponse.pngfree_running.pdf 
  9163   Thu Sep 26 01:49:28 2013 MasayukiSummaryGreen LockingFPMI noise caused by ARM locking 
 Measurement
 MICH_OLTF.pdfBS-RS55Q.pngETMX-RS55.pngETMY-RS55.pngplot.pdf 
  9167   Thu Sep 26 23:02:40 2013 ranaUpdateLSCFPMI noise caused by ARM lockingHidden in Nakano-kun's previous entries
was that the phase margin of the X-Arm was
only 9 degrees!! This extremely close to
 Xarm_sweep_130926.pdflsc.pdferr.png 
  9168   Fri Sep 27 00:48:53 2013 MasayukiUpdateLSCFPMI noise caused by ARM locking

    

       
            
 phase_badget.pngFPMI_noises.png 
  9201   Fri Oct 4 02:08:32 2013 MasayukiUpdateGreen LockingFPMI with ALS arm stabilization[Manasa, Masayuki]
We locked MICH with 2 arms stabilized
by ALS control.
 FPMI_ALS.pdf 
  9261   Wed Oct 23 00:13:30 2013 MasayukiUpdateGreen LockingFPMI with ALS arm stabilizationSummary
In 2arms + MICH configuration, residual
 ALSnoise1.pngALSnoise2.pngOLTF.png 
  17007   Fri Jul 15 19:13:22 2022 PacoSummaryLSCFPMI with REFL/AS55 demod phase adjust[Yuta, Paco]


We first zero the offsets
in ASDC, AS55, REFL55, POX11, and POY11 when
  
  17008   Fri Jul 15 22:36:04 2022 ranaSummaryLSCFPMI with REFL/AS55 demod phase adjustVery nice!   
  16968   Fri Jul 1 08:50:48 2022 yutaSummaryLSCFPMI with REFL/AS55 trial[Anchal, Paco, Yuta]

We tried to lock FPMI with REFL55
and AS55 this week, but no success yet.
  
  17002   Thu Jul 14 00:10:08 2022 yutaSummaryLSCFPMI with REFL/AS55 trial continued[Paco, Koji, Yuta]

We managed to lock MICH using REFL55_Q
by setting the demodulation phases and offsets
 AS55_I.pngAS55_Q.pngREFL55_I.pngREFL55_Q.png 
  11750   Tue Nov 10 19:25:42 2015 gautamUpdateGeneralFS725 Rubidium referenceIn the last few days, with Koji's help,
I have recovered both the FS725 Rubidium
references from W. Bridge, one from
  
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