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IDup Date Author Type Category Subject Text Attachments
  5841   Tue Nov 8 17:48:21 2011 MirkoUpdateCDSDolphin weirdnessHad since yesterday evening some trouble
with getting a channel from rfm on c1sus
to oaf on c1lsc via dolphin. Several restarts
 Dolphn_TF.png 
  5842   Tue Nov 8 18:06:43 2011 MirkoUpdateAdaptive FilteringNoise injections to MC1-3 PIT & YAWWith fancy analysis tools approaching usability
I looked some more into noise projections
from PIT,YAW motion of the MC mirrors to
 7x 
  5843   Tue Nov 8 19:08:21 2011 MirkoHowToComputersNew DV[quote]To use the new ligoDV (previously GEO
DV) to look at 40m data, open up a matlab,
set up for mDV as usual,
  
  5844   Wed Nov 9 07:57:39 2011 steveUpdateSUSETMX oplev is down and sus damping restoredThe ETMX oplev returning beam is well centered
on the qpd. We lost this signal 2 days ago.
I will check on the qpd. 
 etmxtripped.pngetmxOpl.png 
  5845   Wed Nov 9 10:35:30 2011 jamieUpdateSUSETMX oplev is down and sus damping restored

    

       
            
  
  5846   Wed Nov 9 12:05:08 2011 KatrinUpdateGreen LockingYARM error signal and feedback signalerror signal = signal measured behind the
low-pass filter
feedback signal = output of the gain
 fluctuation_test.png 
  5847   Wed Nov 9 13:44:04 2011 MirkoUpdateComputersNDS1 missing channels in matlabThe Matlab NDS1 access seems to only work
for some channels. With other  channels it
just hangs 'Busy' and does nothing. 
  
  5848   Wed Nov 9 14:23:35 2011 JenneUpdateAdaptive FilteringOAF MC Delay MeasurementAs described in elog
2063 and the mevans
document, we need to measure the TF of
 OAF-MCL-Delay-9Nov2011.pdf 
  5849   Wed Nov 9 14:49:07 2011 kiwamuSummaryLSCCharacterization of the Power Recycled MichelsonEDIT
by KI:
 contour_loss.pngcontour_MM.png 
  5850   Wed Nov 9 16:03:21 2011 kiwamuSummaryGeneralGoal this weekGoal of this week : 
ALS on the Y arm
  
  5851   Wed Nov 9 16:29:36 2011 KojiSummaryLSCCharacterization of the Power Recycled MichelsonDifficult to understand.
The mode matching does not change
the recycling gain. It changes the coupling
  
  5852   Wed Nov 9 16:49:17 2011 kiwamuUpdateGreen LockingY end laser temperature with slow input connectedIndeed it is strange. I took a quick look
at it.
In
  
  5853   Wed Nov 9 17:41:17 2011 JenneUpdateComputersETMX restoredJamie did computer magic.  I burt
restored scxepics, and restored ETMX damping.
  
  5854   Wed Nov 9 18:02:42 2011 jamieUpdateCDSISCEX front-end working again (for the moment...)The c1iscex IO chassis seems to be working
again, and the iscex front-end is running
again.
  
  5855   Wed Nov 9 19:08:18 2011 SureshUpdateelogrestarted elogElog was not responding and was restarted.   
  5856   Wed Nov 9 20:35:58 2011 MirkoUpdateAdaptive FilteringSeismic noise injection into the MCVery elaborated measurement ;-)
On 11-11-08:
18:40 Stomp near STS1 for 2mins
 8x 
  5857   Wed Nov 9 21:21:30 2011 SureshUpdateIOOMC WFS: Output matrix determined with loops closed.With the loops closed I ran the $SCRIPTS/MC/WFS/senseWFSoutMATRX
script and analysed the lockin outputs with
  
  5858   Wed Nov 9 21:32:38 2011 MirkoUpdateAdaptive FilteringPut accelerometers 4-6 on top of MC2 tankPut the accelerometers on top of MC2. Orientated
as the arms,GUR1 and STS1:
 09112011069.jpgCoherence_quiet_time.pngCoherence_quiet_time.fig 
  5859   Wed Nov 9 21:48:43 2011 SureshUpdateIOOWFS Servo included into the MC_AutolockerThe WFS
servo loop will come on 5 seconds after the
MC is locked. 
  
  5860   Thu Nov 10 05:54:23 2011 kiwamuUpdateGreen LockingBeat-note detected : PSL vs Y arm[Katrin / Kiwamu]
The beat-note
 DSC_3606_small.jpg 
  5861   Thu Nov 10 11:52:00 2011 JenneUpdateCDSRFM signal transferringI am not so happy with the control signals
that are coming into the OAF via the RFM/Dolphin/shmem. 
The MCL/MCF signal travels via RFM
 OAF_rfm_signals_MCL.pdfOAF_rfm_signals_MICH.pdfOAF_rfm_signals_PRCL.pdfOAF_rfm_signals_GUR1X.pdf 
  5862   Thu Nov 10 12:28:31 2011 JenneUpdateSUSMC2 is being a little wild...WFS to blameMirko and  Den are measuring MC_F,
which they will report about later, but I
noticed that MC2 is totally crazy right now. 
 WFSscreenshot.png 
  5863   Thu Nov 10 16:26:46 2011 MirkoUpdateComputersFirefox kills elogHad to restart the elog many times. For
some reason firefox 8 on Win 7 kills the
elog pretty consistently when trying to make
  
  5864   Thu Nov 10 16:44:54 2011 MirkoUpdateAdaptive FilteringLooking into MC_F & PSL misalignment [Den, Mirko]
While doing the things below we accidentally
misaligned the PSL laser. Thanks to Suresh
 10112011076.jpg10112011073.jpg 
  5865   Thu Nov 10 19:41:24 2011 JenneUpdateSUSMusings on SUS dewhitening, and MC ELP28'sThe
following will be a stream-of-consciousness,
approximately chronological story of my last
  
  5866   Thu Nov 10 20:20:57 2011 SureshUpdateIOOMC Spot positions have shifted after accelerometer installation on MC2 chamber[ Jenne, Suresh ]
We were tying the fix the WFS and
noticed that the PSL --> MC alignment
  
  5867   Thu Nov 10 22:00:38 2011 MirkoUpdateAdaptive FilteringLooking into MC_F & PSL misalignment


   
        
            
 6x 
  5868   Fri Nov 11 00:18:53 2011 ZachUpdateElectronicsPrecision temperature controllerI have made   
  5869   Fri Nov 11 00:55:53 2011 DenUpdateAdaptive FilteringMC_F[Mirko, Den]
Not satisfactory work of adaptive
filtering make us to think about the signals
 mcl_sim.jpgmcl_real.jpg 
  5870   Fri Nov 11 00:58:19 2011 DenUpdateelogrestarted elogElog suspended 2 times for 1 hour. Too
high frequency.
Restarted.
  
  5871   Fri Nov 11 10:30:27 2011 ranaUpdateAdaptive FilteringMC_F 
 There should be a whitening
filter in the Pentek Generic DAQ board (Eurocard
  
  5872   Fri Nov 11 12:32:45 2011 KatrinUpdateGreen Lockingbeat PSL - YARM laser [Suresh, Katrin]
Measured frequency fluctuation of
the beat between PSL and YARM lasers.
 beat_psl_y.png 
  5873   Fri Nov 11 13:26:24 2011 jamieUpdateSUSMusings on SUS dewhitening, and MC ELP28's

    

       
            
  
  5874   Fri Nov 11 13:35:19 2011 KatrinUpdateGreen LockingFeedback to ETMY[Kiwamu, Katrin]
 20111111_freq_supp.png 
  5875   Fri Nov 11 14:55:47 2011 kiwamuSummaryLSCCharacterization of the Power Recycled Michelson : take 2

    

       
            
 rec_gain.pngrefl.pngpbu.pngMM.pngloss.png 
  5877   Fri Nov 11 21:09:30 2011 SureshUpdateSUSMC2 is being a little wild...WFS to blame


   
        
            
 LOCKMC_screen.png 
  5878   Fri Nov 11 22:07:43 2011 SureshUpdateIOOTried to recover the MC alignment of 4th Nov: partial success, PSL beam clippingI have recovered the yaw values pretty
much .  As the PZT1 rails in this direction
perhaps this is the more relevant of the
  
  5879   Sat Nov 12 02:00:36 2011 MirkoUpdateAdaptive FilteringMC-F and other signalsRegarding http://nodus.ligo.caltech.edu:8080/40m/5867
and http://nodus.ligo.caltech.edu:8080/40m/5869
:
 Compare_signals_at_all_places.pngOAF-MCL-Delay-9Nov2011.pdfCompare_signals_at_all_places.figChannels_attached_to_the_PEM_ADC.pngChannels_attached_to_the_PEM_ADC.fig 
  5880   Sat Nov 12 02:27:00 2011 SureshUpdateComputersC1IOO front end suddenly froze. Was restarted remotely[Koji Suresh]
No one was messing with the c1ioo
or any other machine.   The medm
  
  5881   Sat Nov 12 02:44:18 2011 SureshUpdateComputersC1IOO front end suddenly froze. Was restarted remotely


   
        
            
  
  5882   Sat Nov 12 02:46:13 2011 DenUpdateAdaptive Filteringstacks and groundWe measured the coherence between the seismometer
near the MC2 stack and accelerometers on
the vacuum tank where MC2 is. Because accelerometers
 ground_stack.jpgground_stack_coherence.jpg 
  5883   Sat Nov 12 03:46:55 2011 SureshUpdateIOOMC WFS Servo: Open loop gain [Mirko, Suresh]
I closed the WFS loops and measured
the transfer function from IN2 to IN1 testpoints
 WFS1_PIT_servo_filtershape_20111111_1.pngWFS1_PIT_servo_OLG_20111111_1.pngError_signal_WFS1_PIT_20111111_1.png 
  5884   Sat Nov 12 08:09:47 2011 ranaUpdateIOOMC WFS Servo: Open loop gain Somehow, I generically don't like the idea
of lead filters for the WFS loops. We don't
really need so much bandwidth. I think you
  
  5885   Mon Nov 14 11:32:02 2011 kiwamuSummaryGeneralGoal this weekGoal of this week : Noise
budgeting on the Y arm ALS
  
  5886   Mon Nov 14 12:16:41 2011 JenneUpdateComputersOAF model died for unknown reasonI am meditating on the OAF, and had it
running and calculating things.  I had
the outputs disabled so I could take reference
  
  5887   Mon Nov 14 15:46:14 2011 steveUpdateVACTP2's forepump changedThe foreline pressure of TP2 was 1.4 Torr
this morning. This drypump worked well for
ten months.
 drypump.png 
  5888   Mon Nov 14 17:01:14 2011 kiwamuUpdateGreen LockingALS feedback on MC2Leaving a note on the ALS feedback before
I forget:
The
  
  5889   Mon Nov 14 21:22:48 2011 ranaConfigurationComputersprimetime RSYNC slowing down NODUSnodus:elog>w; who ; date
  9:20pm  up 44 day(s), 
5:14,  5 users,  load average:
  
  5890   Mon Nov 14 22:56:31 2011 kiwamuUpdateGreen LockingY end PDH lock : UGF at 17 kHz[Tomotada / Kiwamu]
 
The open loop transfer function of the Y
 YendOLTF.png 
  5891   Tue Nov 15 00:00:15 2011 SureshUpdateIOOMC was realigned to remove beam clipping and to accommodate PZT1 range[Kiwamu, Suresh]
The MC was realigned to readjust
the input beam direction in pitch such that
  
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