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ID Date Author Type Category Subject Text Attachments
  15094   Wed Dec 11 15:29:17 2019 YehonathanUpdatePSLPMC is lockedMake sure
to measure the power drop of the beam downstream
  
  15093   Wed Dec 11 15:01:57 2019 JonSummaryPSLPMC cavity ringdown measurement[Jon, Yehonathan]

We carried out a set of cavity
ringdown measurements of the PMC. The 1/e
 IMG_0101.jpg 
  15092   Tue Dec 10 18:27:22 2019 YehonathanUpdatePSLPMC is locked{Yehonathan, Jon}

We are able to lock the PMC on
the TEM00 mode of the deflected beam.
  
  15091   Tue Dec 10 15:17:17 2019 YehonathanUpdatePSLPMC is locked{Jon, Yehonathan}

We burt-restored the PSL and the
PMC locked immediately.
  
  15090   Tue Dec 10 13:26:46 2019 YehonathanUpdatePSLAOM first order beam alignmentnvm the PZT can scan over many GHz.




  
  15089   Tue Dec 10 01:24:17 2019 YehonathanUpdatePSLAOM first order beam alignment 




  
  15088   Mon Dec 9 21:22:46 2019 shrutiUpdateGeneralPLL / PM measurement of Xend NPRO PZTIn short: 

Using the
same setup as before with a LPF changed to
have a cutoff of 5 MHz, the PLL was implemented
  
  15087   Mon Dec 9 19:19:04 2019 YehonathanUpdatePSLAOM first order beam alignment{Yehonathan, Rana}

In order to setup a ringdown measurement
with perfect extinction we need to align
 20191209_193112.jpg20191209_193203_HDR.jpgimageedit_2_7551928142.gifimageedit_3_5863650538.gif 
  15086   Mon Dec 9 13:08:24 2019 YehonathanSummaryPEMJump test of seismometers: EX needs recenteringI check the seismometers in the last 14
hours (Attached). Seems like the coherenece
is restored in the x direction.
 seis_191208.pdf 
  15085   Sun Dec 8 20:48:29 2019 ranaConfigurationComputersMegatron: starts up gradeI noticed recently that Megatron was running
Ubuntu 12, so I've started
its OS upgrade.
  
  15084   Sun Dec 8 20:27:11 2019 ranaUpdateComputersViviana upgrade to Ubuntu 16The IBM laptop at EX was running Ubuntu
14, so I allowed it to start upgrading itself
to Ubuntu16 as it desired. After it is done,
  
  15083   Sun Dec 8 20:15:41 2019 ranaSummaryPEMJump test of seismometers: EX needs recenteringI have re-centered the EX (and EY) seismometers.
They are Guralp CMG40-T, and have no special
centering procedure except cycling the power
 seis_all_191208.pdf 
  15082   Fri Dec 6 17:49:46 2019 ranaSummaryPEMJump test of seismometers: EX needs recenteringYehonathan,  Seismometers.pdfsrc.tgz 
  15081   Fri Dec 6 15:22:01 2019 gautamFrogsLSCDAFI system revived[Jordan, gautam]

We did the following:
  
  15080   Fri Dec 6 00:02:48 2019 gautamUpdateLSCWhat is the correct way to set the 3f offsets?Summary:

I made it to 0 CARM offset, PRMI
locked a bunch of times today. However, I
  
  15079   Thu Dec 5 18:15:01 2019 gautamUpdateOptical LeversITM, PRM and BS Oplevs re-centeredIn preparation for locking tonight, I re-centered
the spots on the Oplev QPDs for the ITMs,
BS and PRM after locking and running the
  
  15078   Thu Dec 5 15:09:50 2019 gautamUpdateCDSc1oaf crashed c1lscI tried starting the c1oaf model, but got
a DQ error (I want the option of running
feedforward during locking even if the filters
 SCYerrors.pngCDSnormal.png 
  15077   Thu Dec 5 14:54:15 2019 gautamUpdateGeneralSymlink to SRmeasure and AGmeasureI symlinked the SRmeasure and AGmeasure
commands to /usr/bin/ on donatella (as it
is done on pianosa) so that these scripts
  
  15076   Thu Dec 5 08:44:44 2019 GavinUpdateLoss MeasurementQ Measurements of Test Masses[Yehonathan, Gavin]

Measuring POX11_Q_MON and injecting
a signal into the ITMX_UL_IN port a signal
 20191205_132158.jpg 
  15075   Thu Dec 5 01:54:39 2019 gautamUpdateLSCPartial CM board path engaged
The arm powers could be stabilized
somewhat once the CM_SLOW path to MC2 was
engaged.
However, I was never
 AOengaged.pdf 
  15074   Wed Dec 4 20:32:43 2019 gautamUpdateGeneralPLL for PM measurement Were
some cables from the ALS beat setup modified?
I can't see the beat on the scope, and
  
  15073   Wed Dec 4 19:54:27 2019 gautamUpdateLSCA look to the pastTrawling
through some past elogs, I saw that the ALS
noise increase as a function of CARM offset
 DRFPMI_2016March.pdf 
  15072   Wed Dec 4 12:13:10 2019 gautamUpdateCDSReboot scriptIt was way more annoying without a script
and took longer than the 4 minutes it does
now.
  
  15071   Wed Dec 4 09:11:42 2019 YehonathanUpdateCDSReboot scriptAfter the CDSs crashed we run the rebootC1LSC.sh script.

The script is a bit annoying in
that it requires entering the CDSs' passwords
 medmScreen11.ps 
  15070   Wed Dec 4 08:54:07 2019 YehonathanUpdateIMCMirror analog shaking{Yehonathan, Gavin}

Yesterday we tried to shake ITMX
with a function generator in order to observe
  
  15069   Tue Dec 3 22:41:17 2019 shrutiUpdateGeneralPLL for PM measurement I worked on the setup up for the phase
modulation measurement of the X end NPRO
PZT. A previous similar measurement can be
 PM_measurement.jpeg 
  15068   Tue Dec 3 21:28:24 2019 gautamUpdateALSEY uPDH post mixer LPFHere are some loop transfer functions.
I basically followed the decomposition of
the end PDH loop as was done in the multi-color
 uPDH.pdf 
  15067   Tue Dec 3 20:32:37 2019 ranaOmnistructureDAQNDS2 situationRecently,
accordian to Gautam, the NDS2 server has
 getData.pychanlist.txt 
  15066   Tue Dec 3 18:15:42 2019 gautamUpdateALSEY uPDH post mixer LPFRana and I discussed this alogrythym a
bit today - here are some bullet points,
I'll work on preparing a notebook. We
  
  15065   Tue Dec 3 14:52:13 2019 ranaUpdateIMCQ Measurement of Test Masses

  
  15064   Tue Dec 3 00:51:25 2019 gautamUpdateALSEY uPDH post mixer LPFI'm not sure - maybe it was measurement
error on my part, I will double check. Moreover,
the EX
  
  15063   Tue Dec 3 00:10:15 2019 KojiUpdateALSEY uPDH post mixer LPFI got confused. Why don't we see that
too-high-Q pole in the OLTF? 
  
  15062   Tue Dec 3 00:03:57 2019 gautamUpdateLSCGreen ALS also shows elevated noise with high arm buildupSummary:  ALSnoiseIncrease_greenBeat.pdf 
  15061   Mon Dec 2 23:01:47 2019 gautamUpdateCDSFrequent DTT crashes on pianosaI have been experiencing frequent crashes of  DTTerrorLog.tgz 
  15060   Mon Dec 2 20:18:18 2019 ranaUpdateALSEY uPDH post mixer LPF         
         filter
Q seems too high, 
  
  15059   Mon Dec 2 18:20:29 2019 gautamUpdateALSEY uPDH post mixer LPFAs part of characterization, I wanted to
calibrate the EY uPDH error point monitor
into units of Hz. So I thought I'd measure
 EY_uPDH_LPF.pdfEY_uPDH_OLTF.pdf 
  15058   Mon Dec 2 00:27:20 2019 gautamUpdateALSGreen ALS resurrectionAttachment
#1 -
 ALSnoiseComparison.pdfALS_TR_RIN.pdfGreemAM.pdf 
  15057   Sun Dec 1 13:38:48 2019 ranaUpdateLSCNo shaking but no inspiration eitheryes, reasonable   
  15056   Wed Nov 27 23:24:01 2019 gautamUpdateLSCNo shaking but no inspiration eitherSummary:

I tried the following minor changes
to the locking procedure to see if there
  
  15055   Wed Nov 27 18:51:22 2019 Gavin WallaceUpdateIMCQ Measurement of Test Masses[Yehonathan, Gavin]

As the resonant modes of the 40m
TMs are at high frequencies (starting at
  
  15054   Wed Nov 27 17:51:52 2019 gautamUpdateWienerMCL FF statusThe old MCL filters are not completely
useless - I find a factor of ~2 reduction
in the MCL RMS when I turn the FF on. It'd
 MCL_FF.pdfPRC_FF.pdf 
  15053   Wed Nov 27 16:10:29 2019 gautamUpdateLSCAOM reconnectedi reconnected the AOM driver to the AOM
in the main beam path (it was hijacked for
the AOM in the AUX laser path for Anjali's
  
  15052   Wed Nov 27 13:14:02 2019 ranaUpdateLSCITMX and ITMY OSEMs with low and high circulating powerif the RP don't fit

u must acquit

sweep the laser amplitude
  
  15051   Wed Nov 27 12:16:52 2019 gautamUpdateLSCITMX and ITMY OSEMs with low and high circulating powerSummary:

The ITMX OSEMs report elevated
noise in the 10-100 Hz band when we have
 ITMXshadowSensors.pdfITMYshadowSensors.pdf 
  15050   Tue Nov 26 18:16:08 2019 ranaUpdateLSCPOX / POY calibration...maybe the opto-mechanical
CARM plant
  
  15049   Tue Nov 26 17:07:41 2019 gautamUpdateLSCPOX / POY calibrationSummary:

Since we are using the POX and
POY photodiodes as out-of-loop sensors for
 POX_POY_sensorNoise.pdfALSnoise_20191125.pdf 
  15048   Tue Nov 26 13:33:33 2019 YehonathanUpdateCamerasMC2 Camera rotated by 90 degreesMC2 analog camera was rotated by 90 degrees.
Orientation correctness was verified by exciting
the MC2 Yaw degree of freedom.
 MC2AnalogCameraAfter.jpgMC2AnalogCameraBefore.jpg 
  15047   Mon Nov 25 22:10:26 2019 shrutiUpdateNoiseBudgetDiagnostics This is to help troubleshoot the excess
noise measured earlier.

The following channels were measured
 LSC.pdfITMY.pdfITMX_L.pdf 
  15046   Mon Nov 25 19:11:22 2019 gautamUpdateLSCALS noise re-lookI re-checked the ALS noise in the following
configurations:


PRM is misaligned.
Michelson
 ALSnoise.pdf 
  15045   Fri Nov 22 00:54:14 2019 gautamUpdateLSClocking notes[KA, GV]

There was no shaking (that disturbed
the locking) tonight!
 ALSnoiseIncrease.pdf 
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