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ID Dateup Author Type Category Subject Text Attachments
  1415   Sun Mar 22 22:39:24 2009 ranaSummaryLSCCalibration of the ITM and ETM ActuationI used the following procedure to calibrate
the ITMX actuation signal.
 free.png 
  1416   Sun Mar 22 22:47:58 2009 ranaUpdateDMFseisBLRMS compiled but still dyingLooks like seisBLRMS was restarted ~1 AM Friday
morning but only lasted for 5 hours. I just
restarted it on megatron;
  
  1417   Sun Mar 22 23:16:41 2009 ranaDAQComputer Scripts / Programstpman restartCould get testpoints but couldn't start excitations.
Restarted tpman on daqawg. Works now.
  
  1418   Mon Mar 23 15:50:44 2009 ranaConfigurationLSCfilters deleted, lsc rebootedThe LSC time had gone too high. I deleted
~20 filters and rebooted. CPU time came down
to 50 usec.
  
  1419   Tue Mar 24 03:05:25 2009 YoichiUpdateLockingLocking tonightMC1 issue:
The MC1 seems to be drifting still. I found
it was off from the SUS drift-mon reference
  
  1420   Tue Mar 24 09:04:02 2009 steveUpdateSUS4.8 mag earthquakeSRM, ITMX, ETMX, ITMY and ETMY lost damping
at 4:55am this morning from 4.8 magnitude
earthquake.
  
  1421   Tue Mar 24 13:10:07 2009 AlbertoConfigurationPSLnew mirror installed on the AP tableNew flipping mirror installed on the AP
table on the beam path to the REFL199 PD.
If you're missing the double demod
  
  1422   Tue Mar 24 13:54:49 2009 JenneUpdateSUSOp Levs CenteredITMX, ITMY, BS, SRM, PRM op levs were all
recentered.  ETM's looked okay enough
to leave as-is. 
  
  1423   Tue Mar 24 19:55:24 2009 JenneUpdateLSCNew PO DC[Rana, Jamie, Jenne]
SPOB DC hasn't been so good lately,
so we installed a new PO DC PD on the PO
  
  1424   Tue Mar 24 23:23:05 2009 ranaUpdateLSCNew PO DCWe also found that the SPOB RF cable was going
through a splitter before going into the
SPOB demod board. The other
  
  1425   Wed Mar 25 01:37:35 2009 rana, yoichiSummaryIOONo Reference Cavity RequiredWe were wondering if we need to have a reference
cavity. One possible reason to have one is
to reduce the free running
  
  1426   Wed Mar 25 04:18:28 2009 YoichiUpdateLockingTuesday LockingAfter the new PO_DC PD was installed, I tweaked
several gains to make the locking scripts
work right.
 AO-Loop-p9.png 
  1427   Wed Mar 25 09:55:45 2009 steveUpdateIOOglitching sensors of MCSUS-MC1_SENSOR_SIDE and SUS-MC2_SENSOR_UL
are glitching
Yesterday's 4.8mag earthquake at
 glitchesofMC.jpg 
  1428   Wed Mar 25 17:22:58 2009 YoichiUpdateIOOMC lock without FSSI made 40k:4k passive filter in a POMONA box
and connected it to IN1 (not TEST IN1) of
the FSS box.
 MC-loop-gain.png 
  1429   Wed Mar 25 20:41:43 2009 JenneUpdateIOOMode Cleaner Servo Board Transfer Functions (to be updated)When all things fail (netgpibdata.py is
giving me weird data.  When I plot the
data it has saved from the 4395A, it's some
 MCwithBoxsmall.JPGMCnoBoxsmall.JPGPomonaBoxforMCsmall.JPG 
  1430   Thu Mar 26 00:45:24 2009 JenneUpdateIOOMode Cleaner Servo Board Transfer Functions (to be updated)


   
        
            
 MCwithandwithoutfilter25Mar2009.pngPomonaBoxMCfilter25Mar2009.pngMCServoData25Mar2009.tar.gz 
  1431   Thu Mar 26 04:01:24 2009 YoichiUpdatePSLFSS Open Loop GainYoichi, Peter, Jenne

Attached is the open loop transfer function
 OpenLoopTF.png 
  1432   Thu Mar 26 04:09:38 2009 YoichiUpdateIOOSingle X arm lock spectra with different MC lock schemesThe attached plots show MC_F, FSS_FAST_F and
XARM IN/OUT spectra with different MC locking
modes.
 XarmSpectra.pdfXarmSpectraZoom.pdf 
  1433   Thu Mar 26 04:27:26 2009 YoichiUpdateLocking3.8kHz peak as a function of the arm powerDuring the power ramp-up, I actuated CARM
using ETMs and measured the transfer functions
to the PO_DC at several arm powers.
 CARM-PODC.pdf 
  1434   Thu Mar 26 09:08:18 2009 KakeruUpdateoplevsarm cavity oplev calibrationI uploaded a document about my oplev calibration.
/cvs/cds/caltech/users/kakeru/oplev_calibration/oplev.pdf
  
  1435   Fri Mar 27 02:40:06 2009 peteSummaryIOOMC glitch investigationYoichi, Pete
The MC loses lock due to glitches
in the MC1 coils. 
We do
 MC1_Drift.png 
  1436   Fri Mar 27 02:50:54 2009 YoichiUpdateLockingDD demodulation phase suspiciousI noticed that the gain of PD6_Q (before the
phase rotation) was 0 whereas PD6_I gain
was 15.
  
  1437   Fri Mar 27 15:05:42 2009 YoichiUpdateIOOMC glitch investigationAttached plots are the result of the
MC1 trend measurement.
See the
attachment #1. The first two plots show the
 MC1_Drift.pdfMC2_Drift.pdf 
  1438   Fri Mar 27 17:52:16 2009 YoichiUpdateIOOMC glitch investigationPer Rob's suggestion, I put the probes
across the output resistors of the bias current
buffers instead of measuring the output voltage
  
  1439   Sun Mar 29 13:44:27 2009 steveUpdateSUSETMY sus damping restoredETMY sus damping was found to be tripped.
It was retored.
All fluorecent light were turned
  
  1440   Sun Mar 29 17:54:41 2009 YoichiUpdateSUSMC1 drift investigation continuedThe attached plots show the trend of the MC
OSEM signals along with the voltages across
the output resistors of the bias current
 Drift1.pdf 
  1441   Mon Mar 30 09:07:22 2009 ranaUpdateSUSMC1 drift investigation continued[COLOR=chocolate]Maybe we can temporarily
just disconnect the bias and just use the
SUS sliders for bias if there's enough range?[/COLOR]
  
  1442   Mon Mar 30 12:29:17 2009 YoichiConfiguration MC1 glitches not seen during the weekendThe attached is the MC trend for the past
12 hours.
There is no MC1 glitches in the OSEM signals.
 MC_drift.pdf 
  1443   Mon Mar 30 12:46:36 2009 YoichiConfigurationIOOIOO QPDs were missing the beamWhen I re-locked the MC, I wanted to check
the trend of the IOO QPDs to see if the input
beam pointing has changed.
 IOO-QPDs.pdf 
  1444   Mon Mar 30 13:29:40 2009 YoichiUpdateSUSMC1 drift investigation continued[quote][COLOR=chocolate]Maybe we can temporarily
just disconnect the bias and just use the
SUS sliders for bias if there's enough range?[/COLOR][/quote]
  
  1445   Mon Mar 30 15:51:27 2009 steveUpdateElectronicsHP4291A left the lab to be repairedEric Gustafson is handling the old HP4291A
rehabilitation. Tarac picked both units up
today.
  
  1446   Mon Mar 30 17:02:46 2009 YoichiConfigurationGeneralAP OSA alignedI aligned the AP OSA, which had been mis-aligned
for a while.
  
  1447   Tue Mar 31 09:42:32 2009 steveUpdatePEMETMY sus damping restored againThe Caltech gasoline storage tank is being
upgraded.
They are jack hammering and digging
  
  1448   Wed Apr 1 10:22:13 2009 steveUpdateVACRGA logging is workingThanks to Joe B who made the SRS RGA working
with linux
Last data file logged at 2008 Oct
 rga-090401.png 
  1449   Wed Apr 1 15:47:48 2009 YoichiUpdateLocking3.8kHz peak looks like a real optical response of the interferometerYoichi, Peter

To see where the 3.8kHz peak comes from,
 CARM-ETM-EXC.pngAOpath-TFs.png 
  1450   Wed Apr 1 16:14:36 2009 YoichiUpdateLocking3.8kHz peak does not change with SRC offsetYoichi, Peter

We suspected that maybe the 3.8kHz peak is
  
  1451   Wed Apr 1 23:18:07 2009 rana, kojiSummaryIOONo Reference Cavity RequiredKoji sent us a note about our "No Reference
Cavity Required" entry. I thought that it
nicely summarizes the
  
  1452   Fri Apr 3 10:01:50 2009 steveUpdateVACrgascan with temp plotRga scan of day 231 since pumpdown pd66-m-d231
m stands for maglev pumping speed,
vacuum normal condition of valves,
 pd66tempow.jpgrga-090403scan.png 
  1453   Fri Apr 3 14:52:38 2009 JenneOmnistructurePEMGuralp is finally back!After many, many "it'll be there in
2 weeks" from the Guralp people, our
seismometer is finally back!
  
  1454   Fri Apr 3 17:20:05 2009 YoichiUpdateLockingThe 3.8kHz peak seems like the DARM RSE (not 100% sure though)Yoichi, Kentaro,

Last night, we took several measurements
 AO-TF-DARM-OFFSET.pngAO-TF-DARM-DEMOD-PHASE.pngAO-TF-MICH-OFFSET.pngPOX_1I.pngDARM-Loop.pdf 
  1455   Mon Apr 6 19:09:15 2009 JenneUpdatePEMOld Guralp is hooked back up to the ADCOld Guralp is hooked back up, the new one
is sitting next to it, disconnected for now.
  
  1456   Mon Apr 6 21:50:43 2009 ranaUpdateLSCArm Locking via pushing MC2Inspired by our 'No Refcav' scheme here, I
was inspired to re-explore the idea of locking
the
 mc2-xarm.pdfUntitled.pngnohands.pdf 
  1457   Tue Apr 7 21:39:57 2009 YoichiConfigurationComputersLSC code recompiled with a fix for denormalization problemThis is not my work but I will put it for
the record.
  
  1458   Wed Apr 8 02:47:42 2009 YoichiUpdateLockingLocking statusThis is a summary of activities in the last
few nights, although there is not much progress.
 CARM_TFs.pdfDARM_TFs.pdfDARM-CARM-Coupling.pdf 
  1459   Wed Apr 8 09:36:20 2009 steveConfigurationVAC valve condition changed to BG to calibrate the RGAVacuum
normal valve condition was changed to accommodate
SRS-RGA calibration.
  
  1460   Wed Apr 8 18:18:33 2009 ranaConfigurationComputersLSC code recompiled with a fix for denormalization problemBelow is the link to the anti-denormalization
technique that Rolf and Alex implemented
at the sites,
  
  1461   Wed Apr 8 18:46:50 2009 ranaConfigurationGeneralDMF, SVN, x2mc, and matlabWhile waiting for the installation of the
32-bit Matlab 2009a to finish, I tried updating
our seisBLRMS.m code.
  
  1462   Thu Apr 9 11:27:19 2009 steveUpdateVACvac gauge reading problemCold cathode gauge CC4  is reading
normal.
CC1 is glitching, it is probably
 vacgflsec.jpgvacgflmin.jpg 
  1463   Thu Apr 9 12:23:49 2009 peteUpdateLockingtuning ETM common modePete, Yoichi
Last night, we put the IFO in FP
Michelson configuration.  We took transfer
 FPMI-DARM-CARM-ETM-fineScan.pdf 
  1464   Thu Apr 9 20:56:12 2009 YoichiHowToGeneralRestore the alignment. Write elog entries.I often find that the mirrors are left mis-aligned
(like in X-arm mode) when I come in for the
locking, including tonight.
  
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