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ID Dateup Author Type Category Subject Text Attachments
  13797   Fri Apr 27 16:55:31 2018 gautamUpdateGeneralEY area access blockedSteve was calibrating the load cells at
the EY table with the crane - we didn't
get through the full procedure today, so
  
  13798   Fri Apr 27 18:42:02 2018 ranaUpdatePEMnew Seis temp chansfor whatever reason, I am unable to get
minute or second trends from nodus for any
channels (IMC, PEM, etc) since the reboot.
  
  13799   Sun Apr 29 22:53:06 2018 gautamUpdateGeneralDARM actuation estimateMotivation:

We'd like to know how much
actuation is required on the ETMs to lock
 darmEst.pdf 
  13800   Mon Apr 30 15:36:18 2018 KiraUpdatePEMfinal setup sketchI've attached a sketch of how the panel
will be mounted. We should make a small rectangular
box that would raise the panel from the block
 mount.png 
  13801   Mon Apr 30 23:13:12 2018 KevinUpdateComputer Scripts / ProgramsDataViewer leapsecondsI was trying to plot trends (min, 10 min,
and hour) in DataViewer and got the following
error message
  
  13802   Tue May 1 08:04:13 2018 Jon RichardsonConfigurationElectronicsPSL-Aux. Laser Phase-Locked Loop[Jon, Gautam, Johannes]

Summary: In
support of making a proof-of-concept RF measurement
 IMG_2553.jpgIMG_2551.jpgIMG_2552.jpgsrc_gouy_phase_v3.pdf 
  13803   Tue May 1 11:15:19 2018 KiraUpdatePEMPID QuixoteI added an out of loop sensor to the can
by placing the lab temperature sensor inside
the can. I'm not sure which channel is
 IMG_20180501_154826.jpg 
  13804   Tue May 1 15:23:18 2018 KiraUpdatePEMnew ADC channel setup issue[Kira, Johannes]

I connected up the channels for
the ADC Acromag a while back and we were
 IMG_20180501_152014.jpg 
  13805   Tue May 1 19:37:50 2018 gautamUpdateGeneralDARM actuation estimateHere is an updated plot - the main difference
is that I have added a trace that is the
frequency domain wiener filter subtraction
 darmEst.pdfdarmEst_time.pdf 
  13806   Wed May 2 10:03:58 2018 SteveHowToSEIpreparation of load cell measurement at ETMXGautam and Steve,

We have calibrated the load 
cells. The support beams height monitoring
 6x 
  13807   Wed May 2 21:39:33 2018 gautamConfigurationALSIR ALS for EYThe new K6XS mounts I ordered have arrived.
I want to install one of them at the Y-end.
I can't find a picture of the current
  
  13808   Thu May 3 00:42:38 2018 KevinUpdatePonderSqueezeCoil driver contribution to squeezing noise budgetIn light of the discussion at today's
meeting, Guantanamo and I looked at how the
series resistance for the test mass coil
  
  13809   Thu May 3 09:56:42 2018 SteveHowToSEIpreparation of load cell measurement at ETMX[ Dennis Coyne'  precision answer
]

  
  13810   Thu May 3 10:40:43 2018 johannesConfigurationGeneralAS port laser injectionInstead of trying to couple the fiber output
into the interferometer, I'm doing the
reverse and maximize the amount of interferometer
 mm_solution_AStable.pngAStable_beampath.pdf 
  13811   Thu May 3 12:10:12 2018 gautamConfigurationGeneralAS port laser injectionI think we need AS55 for locking the configuration
Jon suggested - AS55 I and Q were used to
lock the SRMI previously, and so I'd
  
  13812   Thu May 3 12:19:13 2018 gautamUpdateCDSslow machine bootfestReboot for c1susaux
and 
  
  13813   Thu May 3 20:29:39 2018 gautamConfigurationElectronicsPSL-Aux. Laser Phase-Locked LoopSome notes about the setup and work at
the PSL table today, Jon can add to / correct
me.
  
  13814   Fri May 4 13:24:56 2018 Jon RichardsonConfigurationElectronicsAUX-PSL PLL Implementation & CharacterizationAttached are final details of the phase-locked
loop (PLL) implementation we'll
use for slaving the AUX 700 mW NPRO laser
 PLL_Schematic.pdfPLL_AUX-PSL_40m.pdf 
  13815   Fri May 4 18:59:39 2018 gautamUpdateSUSStack measurement ongoing[SV,KA,RXA,GV]

The
  
  13816   Fri May 4 19:06:28 2018 ranaConfigurationElectronicsAUX-PSL PLL Implementation & Characterizationthis doesn't make much sense to me;
the phase to frequency conversion (mixer-demod
to PZT ) should give us a 1/f loop as Johannes
  
  13817   Fri May 4 21:17:57 2018 gautamConfigurationALSBeathMouth pulled out of PSL tableI have been puzzled about the beat note
level we get out of the BeatMouth for some
time.
  
  13818   Sat May 5 20:30:21 2018 KojiUpdatePSLModulation depth measurement for the 3IFO aLIGO EOM and aftermathCaution:
Because of this work and my negligence, the
RF output of the main Marconi for the IFO
  
  13819   Sat May 5 22:32:07 2018 KojiUpdatePSLModulation depth measurement for the 3IFO aLIGO EOM The 3IFO EOM was formerly tuned as the
H2 EOM, so the resonant frequencies are different
from the nominal aLIGO ones.
  
  13820   Mon May 7 11:46:07 2018 gautamUpdatePEMFW parameter updateAs part of investigation into this issue,
Jonathan Hanks pointed out that the "minute
trends" being recorded by our system
 FWreboot.png 
  13821   Mon May 7 15:27:28 2018 gautamUpdateSUSStack measurement expectation[steve,gautam]

We tried to estimate what the load
cell measurement should yield. Here is the
 40m_TMstack.JPG 
  13822   Mon May 7 16:23:06 2018 gautamUpdateGeneralDARM actuation estimateSummary:

Using the Wiener Filter estimate
of the DARM disturbance we will have to cancel,
 darmProj.pdf37.pngMCalign_20180507.png 
  13823   Mon May 7 20:01:14 2018 RorpheusUpdateGeneralUse anti-dewhitening + show CARMA/DARMA    
  13824   Tue May 8 00:40:51 2018 gautamConfigurationALSBeathMouth pulled out of PSL tableSummary:

I did some more BeatMouth characterization.
My primary objective was to do a power budget.
 IMG_6986.JPGIMG_6987.JPG 
  13825   Tue May 8 10:24:10 2018 KiraSummaryPEMplan for this weekHere are a few things I will be working
on:


Design PCB boards for the
  
  13826   Tue May 8 11:41:16 2018 gautamUpdateGeneralIFO maintenanceThere was an earthquake, all watchdogs
were tripped, ITMX was stuck, and c1psl was
dead so MCautolocker was stuck.
 ITMX_stuck.png 
  13827   Wed May 9 17:30:04 2018 gautamUpdateGeneralInput beam misalignedThere is
no beam going into the IFO at the moment.
 InputBeamGone.pngTTpointing.png 
  13828   Wed May 9 19:51:07 2018 gautamUpdateGeneralInput beam misalignedAs
suspected - the problem was with the TTs.
 DACweirdness.pngDACerror.png 
  13829   Thu May 10 08:45:16 2018 SteveUpdateGeneral4.5M eq. Cabazon, CA20180508 4:49am Cabazon earth quake 4.5M
at 79 miles away.  ETMX is in load cell
measurment condition.
 Cabazon4.5m79m.png4.5Meq.png 
  13830   Thu May 10 11:38:19 2018 gautamUpdateGeneralITMY ULLooking at Steve's plot, I was reminded
of the ITMY UL OSEM issue. The numbers don't
make sense to me though - 300um of DC shift
 ITMY_UL.pdf 
  13831   Thu May 10 14:13:22 2018 gautamUpdateGeneralMore refinement of DARM control signal projectionSummary:


It
seems that after a x10 increase in the coil
 darmProj.pdfdarmOLTF.pdfDWcomparison.pdf 
  13832   Fri May 11 11:47:33 2018 johannesSummaryPEMAcromag issuesThe replacement Acromag we scooped from
the West Bridge E-Shop does actually seem
to work, although we thought it was broken
  
  13833   Fri May 11 13:58:42 2018 ranaUpdateGeneralMore refinement of DARM control signal projectionI think "OLG" trace is not labeled
right; it would be good to see the actual
OLG in addition to whatever that trace actually
  
  13834   Fri May 11 18:17:07 2018 gautamUpdateDetCharAUX laser PLL setup[koji,
gautam]

As discussed at the meeting earlier
  
  13835   Fri May 11 19:02:52 2018 gautamUpdateGeneralMore refinement of DARM control signal projectionI was a bit hasty in posting the earlier
plots. In the earlier plot, the "OLG"
trace was OLG * anti dewhitening as Rana
 darmProj.pdfdarmOLTF.pdfDWcomparison.pdfDARMsuppression.pdfControlLoop.pdf 
  13836   Sat May 12 10:02:03 2018 ranaUpdateGeneralMore refinement of DARM control signal projectionGood question! I've never calculated
what the resonance frequency would be if
had an inductive resistor with our cable
  
  13837   Sun May 13 15:15:18 2018 gautamUpdateGeneralCDS crashI found the c1lsc
machine to be completely unresponsive today.
 vertexFEs_crashed.png 
  13838   Sun May 13 17:31:51 2018 gautamUpdateGeneralCDS crashAs suspected, this was indeed a path problem.
Johannes will elog about it later, but in
short, it is related to some path variables
 CDS_overview_20180513.pngAS_1210293643.jpeg 
  13839   Sun May 13 20:48:38 2018 johannesUpdateGeneralCDS crashI think the root of the problem is that
the /opt/rtapps/
  
  13840   Mon May 14 08:55:40 2018 Dennis CoyneHowToSEIpreparation of load cell measurement at ETMXfollow
up email from Dennis 5-13-2018.
  
  13841   Mon May 14 18:58:32 2018 KevinUpdatePonderSqueezeSqueezing with no SRM


Quote:


 homodyne_heatmap.pdfdisplacement_noise.pdfnoise_budget.pdf 
  13842   Tue May 15 10:42:14 2018 KojiUpdatePSLModulation depth measurement for the 3IFO aLIGO EOM and aftermathThe marconi RF output was turned on and
thus the RF generator condition was restored
to the nominal state on Friday 11th.
  
  13843   Tue May 15 13:34:30 2018 SteveUpdatesafetysurf safety trainingPooja and Keirthana received 40m specific
basic safety training.
  
  13844   Tue May 15 15:13:23 2018 KiraSummaryPEMAcromag issuesI tried calibrating the other channels
today, but they still fluctuate. Sometimes
they do stabilize at +/- 10V, but then suddenly
  
  13845   Tue May 15 20:51:27 2018 gautamConfigurationElectronicsMaking PLL setup more permanent[jon, steve, gautam]

Some points which Jon will elaborate
  
  13846   Tue May 15 21:56:57 2018 gautamUpdateGeneralStack measurement setup decommissioned[steve,koji,gautam]

Since we think we already know
  
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