40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log, Page 154 of 346  Not logged in ELOG logo
ID Date Author Type Category Subject Text Attachments
  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
  
  9690   Wed Mar 5 09:52:31 2014 JenneUpdateSUSOplev Tuning - Cartoon cost functionNot a whiteboard, but here's a cartoon
of my oplev cost function cartoon. 
For the "maximize this area" and
 CostFunctionOplev.pdf 
  9689   Tue Mar 4 17:07:27 2014 SteveUpdatePEM floor cleaning under racks

    

       
            
  
  9688   Mon Mar 3 23:16:06 2014 ranaUpdateLSCY Arm Loop Shape found to be weird: changed now I was getting the Y Arm ready for
Eric Q's loss measurements and so I looked
at the noise and loop shape. The loop shape
 Yarm_sweep_140303.pdfYarm_sweep_140303b.pdfyarm.pdf 
  9687   Mon Mar 3 22:21:43 2014 KojiSummaryLSCPRMIsb locked with REFL165I&QSuccessful
PRMIsb locking with REFL165I/Q
My
  
  9686   Mon Mar 3 21:50:35 2014 JenneUpdateComputer Scripts / ProgramsDropbox installed on WorkstationsI have installed Dropbox on the 40m workstations,
using the foteee account. 
I put it in /users/Dropbox.
  
  9685   Mon Mar 3 17:35:10 2014 KojiUpdateLSCVarious demod phase measurementI wanted to check how the refl signals
looked like. 
I decided to measure the demod phase
  
  9684   Mon Mar 3 11:55:39 2014 KojiUpdateCDSfb timing was offWe need to correctly setup crontab or rc.local
for the frontend machines.
  
  9683   Mon Mar 3 10:42:53 2014 JenneUpdateCDSfb timing was off...yet again.
lsc and sus needed mxstream restarts
after I restarted the ntp on fb.
  
  9682   Thu Feb 27 22:25:29 2014 ranaUpdateSUSOplev Tuning Party - round 1 commentary  in order to Win in Loop Tuning,
you must draw a 
  
  9681   Thu Feb 27 13:11:13 2014 steveUpdatesafetysafety audit correction

    

       
            
 noDaisyChaining.jpgZbThumbnail.info 
  9680   Thu Feb 27 01:02:57 2014 JenneUpdateSUSOplev Tuning Party - round 1[Jenne, Vivien]
We
had an oplev tuning party this afternoon. 
 PRM_oplevTuning_26Feb2014.pdf 
  9679   Wed Feb 26 23:14:07 2014 JenneUpdateCDSfb timing was off....fb timing issue happened again.
I thought that it was the thing that
Koji and I saw the other day, where it was
  
  9678   Wed Feb 26 10:08:14 2014 SteveUpdateIOOIOO trend 
 The MC is happy 
 IOOtrend3&24h.png 
  9677   Wed Feb 26 02:20:35 2014 JenneUpdateIOOMC unhappyI've asked Manasa and Q to have a look
at the MC in the morning.  Rana and
I have found it to be slightly uncooperative
  
  9676   Wed Feb 26 01:49:08 2014 JenneUpdateLSCChanging PRCL offset changes REFL 165 degeneracyI have measured the sensing matrix at a
variety of PRCL offset values.
 DemodPhaseSeparation.pdfPOP_AS_PDvalues.pdf 
  9675   Tue Feb 25 23:38:05 2014 rana, jenneUpdatePEMGUR1 Z channel excess noise: oscillating Z channelLast night we noticed an excess in the
GUR1Z seis BLRMS on the StripTool. It was
in the 0.1 - 0.3 Hz band. The rumor in the
 gur1z.pdf 
  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 
  9673   Tue Feb 25 17:27:41 2014 JenneUpdateLSCREFL signals calibratedI have recalibrated the REFL signals.
I first adjusted the demod phases
until the I-signals lined up with the I-phase
 SensMat_25Feb2014.pngCalibrated_25Feb2014.pdf 
  9672   Tue Feb 25 16:54:57 2014 steveUpdatesafetysafety audit 2014 
 We had our annual safety inspection
today.  
  
  9671   Tue Feb 25 16:07:33 2014 ericqUpdateLSCChanging PRCL offset changes REFL 165 degeneracy And glossing over the MICH offset,
here's the PRC offset plots in displacement,
rather than radians.
 MICHvPRCLangle_wOffset.pdfMICHvPRCLangle_wOffset_fullscale.pdf 
  9670   Tue Feb 25 14:48:49 2014 ericqUpdateLSCChanging PRCL offset changes REFL 165 degeneracyAfter speaking with Jenne and Gabriele,
I did a little bit of simulating based on
my earlier code that looked at the angle
 MICHvPRCLangle_wOffset.pdfSBprclPeaks.pdf 
  9669   Tue Feb 25 02:46:38 2014 rana, jenneUpdateLSCChanging PRCL offset changes REFL 165 degeneracy[Jenne, Rana]
We put offsets in the PRCL and MICH
loops, and measured sensing matrices for
 PRC_offsetCheck_24Feb2014.pdf 
  9668   Tue Feb 25 00:00:01 2014 rana, jenneUpdateLSCreasons that the REFL signals may be degenerate nowWe're exploring some effects which may
give some funny macroscopic detuning and
cause a near phase degeneracy in the REFL
  
  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
  
  9666   Mon Feb 24 17:59:31 2014 RANAUpdateElectronicsMeasured REFL165 demod board  
 Demod boards should be at 90
deg, not 82.7 or 12 or 
  
  9665   Mon Feb 24 17:21:42 2014 SteveUpdateGreen Lockinggreen fiber status today

    

       
            
 6x 
  9664   Mon Feb 24 16:26:14 2014 JenneUpdateCDSNTP fell out of sync on front end machines - fixed[Koji, Jenne]
Koji noticed that the time on the
front-end detail screens was not correct,
  
  9663   Mon Feb 24 15:25:29 2014 JenneUpdateCDSComputer weirdness with c1lsc machineThe LSC machine isn't any better, and now
c1sus is showing the same symptoms. 
Lame.
  
  9662   Mon Feb 24 13:40:13 2014 JenneUpdateCDSComputer weirdness with c1lsc machineI noticed that the fb lights on all of
the models on the c1lsc machine are red,
and that even though the MC was locked, there
 Screenshot-Untitled_Window-1.png 
  9661   Mon Feb 24 13:21:00 2014 JenneUpdateElectronicsMeasured REFL165 demod board I measured the REFL 165 demod board's
I/Q separation.  
Our 11MHz signal is currently 11.066092
  
  9660   Fri Feb 21 12:45:57 2014 ericqUpdateLSCEquivalent Displacement Noise from QPD Dark Noise in SQRTINVEQ UPDATE: Measured it wrong the first
time, fixed now.
I measured the spectra of the SQRTINV
 SQRTINVspectra.pdfSQRTINV_DarkNoise.pdf 
  9659   Wed Feb 19 22:47:26 2014 JenneUpdateLSCALS locked using LSC model, Common & Diff transitioned to IR transmission signals[Jenne, Koji, Manasa, EricQ]
Today
we successfully locked the ALS using the
 common_diff_ALS.pdfALS_newVSoldBoosts.pdf 
  9658   Wed Feb 19 18:21:33 2014 manasaUpdateLSCScripts for ALS modified

    

       
            
  
  9657   Wed Feb 19 16:42:08 2014 ericqUpdateLSCSome Simulation EffortsDisregard previous
ELOGs, I had the PRC locked on carrier 
 SBLOCK_PRMISensingAsIs.pdfSBLOCK_MICHvPRCLangle.pdf 
  9656   Wed Feb 19 14:14:46 2014 ericqUpdateLSCSome Simulation Efforts Q EDIT: THIS
IS WRONG. I LOCKED PRC ON THE CARRIER
Koji
noted oddities in the sensing matrix results
 PRMISensingAsIs.pdfPRMISensingCoinc.pdfMICHvPRCLangle.pdf 
  9655   Wed Feb 19 11:45:12 2014 JenneUpdateLSCScripts for ALS being modifiedWe
need to change several scripts for use with
the new ALS-in-the-LSC paradigm:
  
  9654   Wed Feb 19 11:00:16 2014 ericqUpdateLSCSome Simulation Efforts Q EDIT: THIS
IS WRONG. I LOCKED PRC ON THE CARRIER
 As
Koji measured the other day: MICH and
 PRMISensingAsIs.pdfPRMISensingCoinc.pdfMICHvPRCLangle.pdfArmLengthChoice.pdf 
  9653   Wed Feb 19 08:07:01 2014 steveUpdatesafetyannual laser safety glasses check  
 All 40m laser safety glasses
are cleaned and measured this morning. 
 AA2014checked.jpg2014check.jpg 
  9652   Wed Feb 19 03:07:22 2014 JenneUpdateLSCALS locked with LSC!No more progress tonight. 
I am still unable to lock the ALS using the
regular LSC filters.  I went back to
  
  9651   Wed Feb 19 01:33:03 2014 JenneUpdateLSCALS locked with LSC!I am also not able to lock the ALS using
the 'regular' LSC filters.  To figure
out what filters were doing what, I made
 ALS_XARM_LockingFilters.pdfALSvsLSC_AllLockingFilters.pdfLSC_XARM_LockingFilters.pdf 
  9650   Wed Feb 19 00:35:23 2014 KojiUpdateLSCALS locked with LSC!Great. I indeed disabled all of the triggers
and the normalization during my trial but
in vain.
  
  9649   Tue Feb 18 23:55:33 2014 JenneUpdateLSCALS locked with LSC!I'm really excited, so I'm posting this,
even though I'm still working:
  
  9648   Tue Feb 18 23:27:14 2014 JenneUpdateLSCALS not locking with LSC It looks like its somehow a discrepancy
between the TFs of each error signal, because
features are similar, and present, in both
 ALSX_POXvsBeatnote_withEXCtfs.pdf 
  9647   Tue Feb 18 20:31:29 2014 KojiUpdateLSCALS not locking with LSC Hmm. Wierd. Can you look at the TFs between
ETMX-EXC and the error signals so that we
can identify which one has these structures.
  
  9646   Tue Feb 18 18:52:08 2014 JenneUpdateLSCALS not locking with LSC Koji mentioned to me (and elogged) that
he was unsuccessful locking the ALS using
the LSC servos.  He suggested I look
 ALSX_POXvsBeatnote.pdfALSY_POYvsBeatnote.pdfBeatNoteSpectra_ArmsLockedWithIR_28Feb2014.pdfALSvsLSC_LockingFilters.pdf 
  9645   Tue Feb 18 14:28:15 2014 JenneUpdateIOOMC unstable - centering spots helpedAs we've been seeing a bit lately, the
MC will be locked happily for several hours,
but then it will start misbehaving. 
  
  9644   Tue Feb 18 10:38:55 2014 SteveUpdateVACRGA scan at day 13 All normal.
 
 pd77m13d.pngRGAscan13d.png 
  9643   Tue Feb 18 10:10:07 2014 SteveUpdatePEM floor cleaning under racks

    

       
            
  
  9642   Mon Feb 17 20:35:19 2014 ericqUpdateElectronicsTransmon QPD whiteningMy apologies for all of that crap I left
at the Y-end... I cleaned the rest of it
up today. 
 qpdY2whit.pdfETMY_QPD_whitening.zip 
ELOG V3.1.3-