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ID Date Authorup Type Category Subject Text Attachments
  13796   Fri Apr 27 01:36:02 2018 gautamConfigurationALSIR ALS noise performanceSummary:

My goal was to do some further
characterization of the IR ALS system tonight.
 2018_04_BeatMouth_POX.pdf2018_04_BeatMouth.pdfALSSpecgram.pdfALS_ASD.pdfALSstab.pdf 
  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
  
  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 
  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 
  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
  
  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.
  
  13815   Fri May 4 18:59:39 2018 gautamUpdateSUSStack measurement ongoing[SV,KA,RXA,GV]

The
  
  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.
  
  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 
  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 
  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 
  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 
  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 
  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 
  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
  
  13847   Tue May 15 22:11:38 2018 gautamUpdateGeneralIFO maintenanceSince there have been various software/hardware
activity going on (stack weighing, AUX laser
PLL, computing timing errors etc etc), I
 OL_RIN_2018_05_15.pdfOLsums.png 
  13848   Wed May 16 18:52:50 2018 gautamConfigurationElectronicsPLL mysteries solved[Koji,
Gautam]

Summary:
 PLLanalysis.pdfPZTcal.pdfSR560_funkiness.pdf 
  13852   Thu May 17 11:56:37 2018 gautamUpdateGeneralEPICS process died on c1iooThe EPICS process on the c1ioo front
end had died mysteriously. As a result, MC
  
  13860   Thu May 17 18:05:01 2018 gautamUpdateSUSSR785 near 1X5I'm working near 1X5 and there is an
SR785 adjacent to the electronics rack with
some cabling running along the floor. I plan
 B55CE985-B703-4282-B716-3144957C7372.jpeg 
  13863   Fri May 18 14:18:03 2018 gautamConfigurationElectronicsBasic MEDM Control Screen setupI setup a basic MEDM screen for remote
control of the PLL.

The Slow control voltage slider
 AUX_PLL_CTRL.png 
  13870   Sun May 20 23:43:50 2018 gautamUpdateIOOCoil driver noise re-measurementSummary:

In the IMC actuation chain, it
looks like the MC1/MC3
 MC1_coilDriver.pdfMC2_coilDriver.pdfMC3_coilDriver.pdfMC_coilDriverNoises.tgzActuationChainNoiseMeas.pdf 
  13871   Mon May 21 10:15:35 2018 gautamUpdatePEMtest setup with seismometerI guess it's fine for now while we
are still finalizing the setup at EX, but
we should eventually line up the seismometer
  
  13873   Mon May 21 15:34:19 2018 gautamConfigurationElectronicsChannel hijacking historySince we've been hijacking channels
like there is no tomorrow for the AUX-PLL
setup, I'm documenting the channel names
  
  13878   Tue May 22 17:26:25 2018 gautamUpdateIOOMC1 Coil Driver pulled outI have pulled out MC1
coil driver board from its Eurocrate, so
  
  13880   Tue May 22 23:28:01 2018 gautamUpdateIOOMC1 Coil Driver pulled outThis work is now complete.
MC1 coil driver board has been reinstalled,
  
  13883   Wed May 23 17:58:48 2018 gautamUpdateIOOMC1 Coil Driver pulled out
Marked up schematic + photo post
changes uploaded to DCC
page.
There was a capacitor
 MC1_monitorTF.pngMC1_ULnoise.pdf 
  13885   Thu May 24 10:16:29 2018 gautamUpdateGeneralAll models on c1lsc frontend crashedAll models on the c1lsc
front end were dead. Looking at slow trend
 c1lsc_crashed.png 
  13886   Thu May 24 13:06:17 2018 gautamConfigurationALSDFD noisesSummary:


The DFD noise floor is
~0.5Hz/rtHz
 DFDcalib.pdfDFD_NB.pdf 
  13889   Thu May 24 19:41:28 2018 gautamConfigurationALSBeathMouth reinstalled on PSL tableSummary:


DC light power incident
on beat PD is 
  
  13890   Thu May 24 20:31:03 2018 gautamConfigurationALSDFD noisesA
couple of months ago, I took 21 measurements
of the delay line transfer function. As shown
 TF_X_mag.pdfTF_X_phase.pdf 
  13896   Wed May 30 10:17:46 2018 gautamUpdateIOOMC1 Coil Driver pulled out[rana,gautam]

Summary:

Last night, Rana fact-checked my
 EM_pickup.pdfcoilDriverNoiseComparison.pdf 
  13899   Wed May 30 23:57:08 2018 gautamUpdatePEMBurning smell in office area / control room[koji, gautam]

We noticed quite a strong burning
smell in the office area and control room
  
  13901   Thu May 31 10:19:42 2018 gautamUpdateSUSMC3 glitchySeems like as a result of my recent poking
around at 1X6, MC3 is more glitchy than usual
(I've noticed that the IMC lock duty
 MC3_glitchy.png 
  13902   Thu May 31 15:36:59 2018 gautamUpdateGeneralNew camera channelsJon informed me that there are some EPICS
channels that JoeB's camera server code
looks for that don't exist. I thought
  
  13907   Thu May 31 23:12:17 2018 gautamUpdateLSCDRMI locking attemptSummary:

I wanted to recover the DRMI locking.
Among other things, Jon mentioned that his
 REFL55_whtCheck.pdf 
  13908   Fri Jun 1 01:22:50 2018 gautamUpdateLSCDRMI locking restoredAs it happened last time, the problem apparently
fixed itself - somehow the act of me disconnecting
the cables and reconnecting them seems to
 DRMI_20180531.png 
  13913   Mon Jun 4 11:00:37 2018 gautamUpdatePSLaux laser replacement


Quote:


  
  13916   Tue Jun 5 02:06:59 2018 gautamUpdatePSLaux laser first (NULL) results[johannes,
gautam]
 Close-But-no.jpg 
  13919   Wed Jun 6 10:44:52 2018 gautamUpdateVACAnnulus pressure channels added to frames[steve,
gautam]

We added the following channels
 AnsPressureLogged.png 
  13920   Wed Jun 6 14:36:15 2018 gautamUpdateLSCTRX clippingFor some time now, I've been puzzled
by the unreliability of the ASS_X dither
alignment servo. Leaving the servo on, TRX
  
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