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ID Date Author Type Category Subject Text Attachments
  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
  
  13872   Mon May 21 14:17:28 2018 KiraUpdatePEMtest setup with seismometerI have attached the graph for the seismometer
temperature fluctuations over 3 days. As
we can see, there is a noticeable fluctuation
 seis-temp.png 
  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
  
  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 
  13869   Sun May 20 17:43:01 2018 ranaUpdateElectronicsHow to choose resistorsArticle
from EE Times, describing why metal foil
(NOT metal film) resistors are really better
  
  13868   Fri May 18 20:03:14 2018 PoojaUpdateCamerasTelescopic lens solution for GigEAim: To find telescopic lens solution to
image test mass onto the sensor of GigE camera.

I wrote a python code to find an
 8x 
  13867   Fri May 18 19:59:55 2018 Jon RichardsonConfigurationElectronicsAUX-PSL PLL Characterization MeasurementsBelow is analysis of measurements
I had taken of the AUX-PSL PLL using an SR560
as the servo controller (1 Hz single-pole
 SR560_OL.pdfSR560_CL.pdf 
  13866   Fri May 18 19:10:48 2018 keerthanaUpdateGeneralCode for adjusting the oscillator frequency remotlyTarget: Phase locking
can be acheived by giving a scan to the oscilator
frequency. This frequency is now controlled
 frequency_set.jpg 
  13865   Fri May 18 18:14:18 2018 Udit KhandelwalSummaryGeneralSummary 05/18/2018Tip-Tilt Suspension Design:

Designed a new ECD plate and
changed dimensions of the side arms after
  
  13864   Fri May 18 14:33:34 2018 KiraUpdatePEMtest setup with seismometerHere is the result of my test. I think
I'll leave the can on over the weekend
because there's a long period of time
 seis_temp_can_on.png 
  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 
  13862   Fri May 18 09:13:41 2018 PoojaUpdateSUSColored GigE imageTo obtain a colored version with good contrast
of the grayscale image of scattering of light
by dust particles on the surface of test
 Image__2017-11-14__08-25-13_100k100g1V_colored.pngImage__2017-11-14__08-25-13_100k100g1V.tiff 
  13861   Fri May 18 07:41:01 2018 steveUpdateSUSclipping ITMX oplevThe ITMX oplev
still clipping

  
  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 
  13859   Thu May 17 15:38:19 2018 KiraUpdatePEMtest setup with seismometerI've moved my setup to the actual seismometer.
I attached the temperature sensor to the
seismometer (attachment 1) with duct tape,
 IMG_20180517_144420.jpgIMG_20180517_145754.jpgIMG_20180517_151956.jpgIMG_20180517_145121.jpg 
  13858   Thu May 17 13:51:35 2018 Jon RichardsonConfigurationElectronicsDocumentation & Schematics for AUX-PSL PLL[Jon, Gautam]

Attached is supporting documentation
for the AUX-PSL PLL electronics installed
  
  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
  
  13851   Thu May 17 09:14:38 2018 SteveUpdateGeneralStack measurement setup decommissionedThe final set-up of stack measurment with
3 load
cells and 4 leveling
 Load_Cell_Measurement_Set_Up.jpgETMX_stack_up_down.png 
  13850   Wed May 16 21:47:17 2018 KevinUpdatePEMSeismometer Noise SpectraEarlier today Kira and I reconnected the
EX seismometer. I just took some spectra
of all three seismometers, shown in the attachments,
 BS_vel.pdfEX_vel.pdfEY_vel.pdf 
  13849   Wed May 16 21:02:22 2018 KevinUpdatePEMADC common mode rejection with new seismometer connectionsAs described in this
elog, the ADC for the seismometers now
has the signals wired directly to the ADC
 ADC_noise.pdf 
  13848   Wed May 16 18:52:50 2018 gautamConfigurationElectronicsPLL mysteries solved[Koji,
Gautam]

Summary:
 PLLanalysis.pdfPZTcal.pdfSR560_funkiness.pdf 
  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 
  13846   Tue May 15 21:56:57 2018 gautamUpdateGeneralStack measurement setup decommissioned[steve,koji,gautam]

Since we think we already know
  
  13845   Tue May 15 20:51:27 2018 gautamConfigurationElectronicsMaking PLL setup more permanent[jon, steve, gautam]

Some points which Jon will elaborate
  
  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
  
  13843   Tue May 15 13:34:30 2018 SteveUpdatesafetysurf safety trainingPooja and Keirthana received 40m specific
basic safety training.
  
  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.
  
  13841   Mon May 14 18:58:32 2018 KevinUpdatePonderSqueezeSqueezing with no SRM


Quote:


 homodyne_heatmap.pdfdisplacement_noise.pdfnoise_budget.pdf 
  13840   Mon May 14 08:55:40 2018 Dennis CoyneHowToSEIpreparation of load cell measurement at ETMXfollow
up email from Dennis 5-13-2018.
  
  13839   Sun May 13 20:48:38 2018 johannesUpdateGeneralCDS crashI think the root of the problem is that
the /opt/rtapps/
  
  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 
  13837   Sun May 13 15:15:18 2018 gautamUpdateGeneralCDS crashI found the c1lsc
machine to be completely unresponsive today.
 vertexFEs_crashed.png 
  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
  
  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 
  13834   Fri May 11 18:17:07 2018 gautamUpdateDetCharAUX laser PLL setup[koji,
gautam]

As discussed at the meeting earlier
  
  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
  
  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
  
  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 
  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 
  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 
  13828   Wed May 9 19:51:07 2018 gautamUpdateGeneralInput beam misalignedAs
suspected - the problem was with the TTs.
 DACweirdness.pngDACerror.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 
  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 
  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
  
  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 
  13823   Mon May 7 20:01:14 2018 RorpheusUpdateGeneralUse anti-dewhitening + show CARMA/DARMA    
  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 
  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 
  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 
  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.
  
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