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ID Date Author Typeup Category Subject Text Attachments
  9337   Mon Nov 4 14:11:23 2013 GabrieleSummaryLSCSimulation of REFL_3f signal when the arms come in

    

       
            
  
  9430   Wed Nov 27 18:31:26 2013 KojiSummaryLSCAdittion of the ALS error signals to the LSC input matrixThe
Phase tracker outputs (= ALS X/Y error signals)
are now conveyed to the LSC model.
  
  9440   Wed Dec 4 15:43:13 2013 JenneSummaryLSCPut LSC DAQ channels backLast week, Koji cleaned up the LSC model
to make it much more readable, while he was
working on piping the ALS signals to the
  
  9476   Sun Dec 15 20:37:41 2013 ranaSummaryTreasureThere is a Wagonga in the container that Steve does not believe inFrom Linda and Bram:  WagSu.pdfWagonga.jpgMandehlingMedStrong.jpg 
  9490   Wed Dec 18 17:28:50 2013 GabrieleSummaryLSCEstimate of the PRC length errorMeasurement 
Looking back at what I did in april
(see log
 data_fit2.pngdata_kick.pngpop110_vs_dL.pngpop110_vs_dL.png 
  9493   Thu Dec 19 12:51:57 2013 JenneSummaryLSCEstimate of the sign of the PRC length errorMy hunch is that the PRC is SHORT
by a few cm, not long. 
In my Optickle simulation, the sidebands
 DesignLength.pngPlus5cm.pngMinus5cm.png 
  9495   Thu Dec 19 18:33:25 2013 GabrieleSummaryLSCEstimate of the sign of the PRC length errorMaybe I'm getting confused,
but I still believe there is no way to decide
the direction from yesterday's measurement.
  
  9498   Fri Dec 20 00:16:39 2013 KojiSummaryCDSRCG parsing bug?A
while ago, I noticed that the most significant
bits of the LSC whitening DOs are not toggling.
 Bit2Word1.pngBit2Word2.png 
  9503   Fri Dec 20 11:40:13 2013 JamieSummaryCDSRCG parsing bug?I submitted a bug report for this:
https://bugzilla.ligo-wa.caltech.edu/bugzilla3/show_bug.cgi?id=553
However, given how old our RCG version
  
  9505   Fri Dec 20 18:00:02 2013 KojiSummaryCDSRCG parsing bug?The bug is still there but the incorrect
bits are now overridden.
 Screenshot-c1lsc-LSC.png 
  9511   Tue Dec 31 23:19:58 2013 KojiSummaryGenerallinux1 RAID crash & recoveryDec 22 between 6AM and 7AM, physical or
logical failure has occure on the 4th disk
in the RAID array on linux1.
  
  9512   Wed Jan 1 15:01:29 2014 KojiSummaryGeneralIFO recoveryIFO restart after the recovery of
linux1
Machine recovery in the following
  
  9513   Thu Jan 2 10:15:20 2014 JamieSummaryGenerallinux1 RAID crash & recoveryWell done Koji!  I'm very impressed
with the sysadmin skillz.
  
  9516   Fri Jan 3 11:18:41 2014 SteveSummaryVACpower supply replaced with a short vent

    

       
            
 rebootVENT.png 
  9517   Fri Jan 3 15:19:39 2014 ranaSummaryPSLPSL pointing monitoring This  PSL_pointing_2013.png 
  9518   Fri Jan 3 18:21:45 2014 ranaSummaryPSLPSL pointing monitoring 
 I went to the PSL table to
re-align the input pointing to the IMC. After
  
  9519   Mon Jan 6 16:30:31 2014 JenneSummaryPSLPSL pointing monitoringI'm not sure which pointing Rana wanted
to fix today, but here's a measurement of
the MC spots.  They actually look pretty
 MCspots_6Jan2014.png 
  9520   Mon Jan 6 16:32:40 2014 KojiSummaryGenerallinux1 RAID crash & recoverySince this configuration change, the daily
backup was speeded up by factor of more than
two.
  
  9537   Wed Jan 8 13:01:48 2014 GabrieleSummaryLSCEffect of PRC length mismatch on error signalsI
ran a simulation of a double cavity with
a PRC length mismatched w.r.t. the modulation
 REFL_vs_PRClength.pdf 
  9539   Wed Jan 8 16:08:52 2014 ericqSummaryLSCEffect of PRC length mismatch on error signals [ericq,Gabriele]
So, we want an relatively quick measurement
of the PRC length error (with sign!) at the
 phaseVlength.pdf 
  9541   Wed Jan 8 19:05:30 2014 GabrieleSummaryLSCEffect of PRC length mismatch on error signals [Gabriele,
EricQ]
 
 as11.pngas55.png 
  9544   Thu Jan 9 17:58:31 2014 ericqSummaryLSCEffect of PRC length mismatch on error signals[ericq, Gabriele, Manasa]
 We wanted to perform the PRC
length measurement today with an AS11 signal,
  
  9546   Fri Jan 10 15:31:07 2014 ranaSummaryLSCEffect of PRC length mismatch on error signals 
 Its very doubtful that the
MC yaw drift matters for the IFO. That's
  
  9548   Sun Jan 12 09:57:24 2014 GabrieleSummaryLSCEffect of PRC length mismatch on error signals

    

       
            
  
  9551   Mon Jan 13 19:31:04 2014 GabrieleSummaryLSCPRMI locking[Gabriele, EricQ]
We wanted to try the PRC length measurement,but
we ended up spending all the afternoon to
  
  9554   Tue Jan 14 19:05:48 2014 GabrieleSummaryLSCPRMI locked on sideband[Gabriele, EricQ] 
Finally, we managed to lock PRMI
on sidebands:
  
  9555   Tue Jan 14 19:10:51 2014 GabrieleSummaryLSCPRC length measurement [EricQ, Gabriele]
We could carry out the measurement
of PRC length. The AS110 photodiode was plugged
  
  9557   Wed Jan 15 18:18:15 2014 GabrieleSummaryLSCPRC length measurement analysis I analyzed the data we took yesterday,
both using AS11 and AS55. For each value
of the phase I estimated the Q/P ratio using
 experimental_data_as11.pdfexperimental_data_as55.pdfsimulation_phase_difference.pdf 
  9561   Fri Jan 17 11:44:25 2014 GabrieleSummaryLSCMore length measurements, more confusion I analyzed the data taken yesterday. 
The AS11 data in PRMI configuration
is very bad, while the AS55 seems good enough:
 results_as11.pdfresults_as55.pdf 
  9562   Tue Jan 21 17:26:59 2014 JenneSummaryVACRebooted RGA computer and reset RGA settings[Jenne, Steve]
Steve noticed that the RGA was not
logging data and that not all the correct
  
  9565   Wed Jan 22 15:24:11 2014 SteveSummaryVACRga scan after reboot

    

       
            
 Rgascan169dwarmingup.pngBlankMedmMustBeFixed.png 
  9585   Wed Jan 29 16:36:37 2014 KojiSummaryGeneralHigh power beam blasting of the aLIGO RFPD [Rich, Jay, Koji]
We blasted the aLIGO RF PD with a
1W IR beam. We did not find any obvious damage.
  
  9586   Wed Jan 29 21:01:03 2014 GabrieleSummaryLSCPRC length measurement analysis [Manasa,
EricQ, Gabriele]
We
 map.pdfscript.zip 
  9588   Thu Jan 30 19:00:25 2014 GabrieleSummaryLSCPRC length changed [Manasa,
EricQ, Gabriele]
Today
 map_jan30.pdfsurvey_v3_jan30.m 
  9590   Fri Jan 31 19:29:36 2014 GabrieleSummaryLSCPRC and SRC lengths Today we measured the missing distance
to reconstruct SRC length.
I also changed the way the mirror
 map_jan31st.pdfsurvey_v3.zip 
  9613   Fri Feb 7 17:52:41 2014 KojiSummaryGeneralSome cleaning up
    Adjusted the PMC alignment

   Adjusted the IMC length offsets for
the MC servo and the FSS servo
   
  
  9634   Thu Feb 13 19:36:36 2014 KojiSummaryLSCPRM 2nd/4th violin filter addedJenne and I noticed high pitch sound from
our acoustic interferometer noise diagnostic
system.
  
  9667   Mon Feb 24 23:43:10 2014 ranaSummaryGeneralToDo1) Fixup REFL165: remove ND filters, get
box for PD, dump diode reflections, put less
light on diode, change DC transimpedance
  
  9674   Tue Feb 25 18:16:22 2014 JenneSummaryLSCEven more violin filtersA new violin mode at 1303 Hz was ringing
up this afternoon.  Rana and I added
a notch for this.
 PRMvio2.png 
  9687   Mon Mar 3 22:21:43 2014 KojiSummaryLSCPRMIsb locked with REFL165I&QSuccessful
PRMIsb locking with REFL165I/Q
My
  
  9691   Wed Mar 5 11:33:10 2014 KojiSummaryLSC2 arm ALS->LSC transition - road mapStep by step description of transition
from 2arm ALS to Common/Differential LSC
for FPMI
  
  9694   Wed Mar 5 19:15:39 2014 JenneSummaryLSCALS offset moving script modified

    

       
            
  
  9698   Thu Mar 6 11:15:32 2014 KojiSummaryLSCStuck at step 2You don't need to make transition from
ALS X/Y to ALS C/D. Just stabilize the arms
with ALS C/D from the beginning.
  
  9708   Mon Mar 10 21:12:30 2014 KojiSummaryLSCComposite Error Signal for ARms (1)The ALS error (i.e. phase tracker output)
is linear everywhere, but noisy. 
The 1/sqrt(TR) is linear and less
 composite_linear_signal.nb.zip 
  9709   Mon Mar 10 21:13:43 2014 nicolasSummaryLSC Composite Error Signal for ARms (2)In order to better understand how the composite
signal would behave in the presence of noise,
I decided to do a simple analysis of the
 rawsigs.pngerrorsigs.pngoptimalweights.pngcompositenoise.png 
  9710   Mon Mar 10 21:14:58 2014 ericqSummaryLSCComposite Error Signal for ARms (3)Using Koji's mathematica notebook, and
Nic's python work, I set out to run a time
domain simulation of the error signal, with
 model.pngsimSweep.pdfalsSweep.pdf 
  9711   Mon Mar 10 21:16:13 2014 KojiSummaryLSCComposite Error Signal for ARms (4) The LSC model was modified for CESAR.
A block called ALSX_COMBINE was made
in the LSC block. This block receives the
 ss1.pngss2.pngCESAR_OFFSETS.pdf 
  9712   Mon Mar 10 21:16:56 2014 KojiSummaryLSCComposite Error Signal for ARms (5) After making the CDS modification, CESAR
was tested with ALS.
First of all, we run CESAR with threshold
  
  9713   Tue Mar 11 14:49:01 2014 KojiSummaryLSCImportant notice on the XARM servoThe nominal gain
of the XARM for the POX11 error signal is
  
  9715   Tue Mar 11 15:14:34 2014 denSummaryLSCComposite Error Signal for ARms (1)

    

       
            
  
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