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ID Date Author Type Categoryup Subject Text Attachments
  16878   Fri May 27 12:15:30 2022 JCUpdateElectronicsCRT TV / Monitor 6[Yehonathan, Paco, Yuta, JC]

As we were cleaning up this morning,
we heard a high pitch sound that turned into
  
  16879   Fri May 27 15:53:17 2022 TommyUpdateElectronicsRFSoC MTS WorkWith some help from the forums, we printed
the status of the DAC MTS sync and were able
to determined that our board's vivado
  
  16882   Tue May 31 14:44:02 2022 JCUpdateElectronicsCRT TV / Monitor 6[Paco, JC]

Paco and I fixed the ethernet cable
which was hanging. We stopped models c1x07
  
  16885   Wed Jun 1 12:56:44 2022 PacoSummaryElectronicsSTEMlab 125 handout[Paco, Deeksha]

Yesterday I handed Deeksha a red
pitaya (stemlab 125 - 10) to begin her summer
  
  16897   Tue Jun 7 18:32:46 2022 DeekshaUpdateElectronicsNoise Budgeting ADC (of redpitaya)Made plots on i/p noise of redpitaya .
Need to reconsider sampling frequency (to
improve plot at lower freq)
 ch1_0.5V.pngch2_0.0V.png 
  16939   Wed Jun 22 17:04:06 2022 DeekshaSummaryElectronicsCharacterising the AUX control loop[Cici, Deekha]

Setup loop to measure transfer
function of control loop - the aim is
 after.jpegbefore.jpegfreq_response.png 
  16951   Mon Jun 27 13:39:40 2022 DeekshaUpdateElectronicsSetting up the MokuLab[Cici, Deeksha]

On Friday Cici and I set up the
Mokulab to take readings of our loop. The
 WhatsApp_Image_2022-06-24_at_5.21.28_PM.jpeg 
  16958   Tue Jun 28 18:19:09 2022 TomislavUpdateElectronicsElectronics noiseI measured electronics noise of WFSs and
QPD (of the WFS/QPD, whitening, ADC...) by
closing PSL and measuring the error signal.
 electronics_noise_spectra.pngerror_signal.png 
  16963   Wed Jun 29 18:53:38 2022 ranaUpdateElectronicsElectronics noisethis is just the CDS error signal, but
is not the electronics noise. You have to
go into the lab and measure the noise at
  
  16964   Thu Jun 30 17:19:55 2022 DeekshaSummaryElectronicsMeasured Transfer Functions of the Control Loop, Servo (OLTF); got Vectfit working [Cici, Deeksha]

We were able to greatly improve
the quality of our readings by changing the
 TFSR785_29-06-2022_114042.pdfTFSR785_29-06-2022_114650.pdfTF_OLG_vectfit.png 
  16972   Tue Jul 5 20:05:06 2022 TomislavUpdateElectronicsWhitening electronics noiseFor whitening electronics noise for WFS1,
I get (attachment). This doesn't seem
right, right?
 whitening_noises.png 
  16974   Wed Jul 6 18:51:20 2022 DeekshaUpdateElectronicsMeasuring the Transfer Function of the PZTYesterday, we set up the loop to measure
the PZT of the transfer function - the MokuLab
sends an excitation (note - a swept sine
 pzt_transfer_fn.pngckt_diagram.jpegMokuPhaseMeterTFData_20220706_174753_TF_Data.txt 
  16983   Mon Jul 11 11:16:45 2022 JCSummaryElectronicsStartup after Shutdown[Paco, Yehonathan, JC]

We began starting up all the electronics
this morning beginning in the Y-end. After
  
  16992   Tue Jul 12 14:56:17 2022 TomislavSummaryElectronicsElectronics noise measurements[Paco, Tomislav]

We measured the electronics noise
of the demodulation board, whitening board,
 23x 
  16995   Wed Jul 13 07:16:48 2022 JCUpdateElectronicsChecking Sorensen Power Supplies[JC]

I went around 40m picking up any
Sorensens that were laying around to test
 658C5D39-11BD-4EE3-90E2-34CBBC1DBD3C.jpeg5328312A-7918-44CC-82B7-54B57840A336.jpeg 
  16998   Wed Jul 13 13:26:44 2022 ranaSummaryElectronicsElectronics noise measurementsas I said to you yesterday, I
don't think image 2a shows the output
of the demod board. The output
  
  17005   Fri Jul 15 12:21:58 2022 JCUpdateElectronicsChecking Sorensen Power SuppliesOf the 7 Sorenson Power Supplies I tested,
5 are working fine, 1 cannot output voltage
more than 20 Volts before shorting, and other
 50DF21D7-D61A-4674-B0DA-463378B00ADB.jpegFA4CF579-6C1E-48D5-B152-74F35B4EE90B.jpeg 
  17019   Tue Jul 19 17:18:34 2022 JCUpdateElectronicsNew Coil Driver on Rack 1X3[Yehonathan, JC]

Yehonathan and I began to put the
electronics on Rack 1X3. To do this, we had
 22DC1767-6073-4D82-BEED-915318B57C03.jpeg 
  17031   Mon Jul 25 09:37:39 2022 DeekshaUpdateElectronicsUsing the DFD to measure PZT TFThe DFD was setup to measure the change
in beatnote when excited. A long long (128in)
cable goes from the SR785 near the DFD all
 ag4395.jpegdfd.jpeg 
  17039   Wed Jul 27 14:39:04 2022 DeekshaUpdateElectronicsNew and improved PZT TF data from the DFDPaco and I messed around with the attenuation
of the scope and bandwidth of the IF. We
also replaced the BNC T's in the
 tf_data.pnglatest_data.zipdfd_-_new.drawio.png 
  17104   Thu Aug 25 15:24:06 2022 PacoHowToElectronicsRFSoC 2x2 board -- fandango[Paco, Chris Stoughton, Leo -- remote]

This morning Chris came over to
the 40m lab to help us get the RFSoC board
 adc0_1137MHz.pngadc1_1137MHz.pngrfdc_PLLsettings.pngclockingwiz_settings.pngblockIPdiag.png 
  33   Tue Oct 30 20:15:24 2007 tobinOtherEnvironmentearthquakeRana, Tobin

Largish (M5.6) earthquake in San Francisco
  
  47   Thu Nov 1 16:42:48 2007 Andrey RodionovSummaryEnvironmentEnd of Daylight Saving Time this weekendUseful information for everyone, as a friendly
reminder:
  
  100   Wed Nov 14 12:33:35 2007 tobinAoGEnvironmentconstructionThe construction crews are running a jack-hammer
right outside of the control room.
 DSC_0172.JPG 
  131   Wed Nov 28 16:18:15 2007 AlbertoMetaphysicsEnvironmentso clean you can eat on itI tidied up the desks in the lab, brought
the Spectrum Analyzers back to the Salumeria
(you don't want to know about that), sorted
 DSC_0180.JPGDSC_0181.JPG 
  212   Sat Dec 22 15:32:11 2007 tobinAoGEnvironmentantsAnts are everywhere: on the PSL table, on
the circuit board I'm soldering...  
 DSC_0361.JPG 
  239   Tue Jan 15 13:15:27 2008 tobinUpdateEnvironmentlots of noiseThey're throwing concrete around at the construction
site.
  
  257   Wed Jan 23 20:52:40 2008 ranaSummaryEnvironmentFlooding from construction areaWe noticed tonight around 7 PM that [B]there
was a lot of brown water in the control room
and also in the interferometer area[/B] mostly
 Shop-Vac_Action.MOVFlooding.pdf 
  290   Fri Feb 1 10:43:05 2008 JohnUpdateEnvironmentConstruction workThe boys next door have some [URL=http://dziban.ligo.caltech.edu:40/40m/?mode=full&reverse=0&reverse=1&npp=20&subtext=hammer]bigger
noisier[/URL] toys.
 DSC_0433.JPG 
  340   Sun Feb 24 10:51:58 2008 tfFrogsEnvironment40m in phdcomics?[url=http://www.phdcomics.com/comics/archive.php?comicid=977][img]http://www.phdcomics.com/comics/archive/phd021308s.gif[/img][/url]   
  374   Thu Mar 13 03:07:19 2008 LisaMetaphysicsEnvironmentCoolness at the 40mMy first (and hopefully not last) week at
the [COLOR=orange]40m lab[/COLOR] is ending
:(
  
  410   Thu Apr 3 18:33:17 2008 AndreySummaryEnvironmentStatus of Weather Station
During the last two days some things related
to weather station have been improved.
  
  414   Fri Apr 4 16:54:06 2008 AndreySummaryEnvironmentWeather station is fully alive
[COLOR=blue]After today's trip to the roof
of our building the weather station seems
 Work_on_the_Roof.pdf 
  666   Mon Jul 14 10:57:00 2008 KojiFrogsEnvironmentSomeone at 40M sent LHO water of lifeSomeone at the 40m sent Mike@LHO a pound of
peets coffee with the name of Koji Arai.
It was a good surprise! Thanks, we will enjoy
  
  716   Tue Jul 22 16:50:09 2008 steveMetaphysicsEnvironmentprofessorial clean up of work benchAtm1: is showing the spiritual satisfaction
after work bench clean up by the professor
himself.
 ranaclup.pngcleanup2.png 
  743   Sun Jul 27 20:25:49 2008 ranaConfigurationEnvironmentOffice Temperature increased to 75 FSince we have the chiller for the PSL chiller
now, [SIZE=2][COLOR=darkred]I've just increased
the office area 
  
  754   Tue Jul 29 11:50:01 2008 JenneUpdateEnvironment5.6 Earthquake Earthquake Details
Magnitude 5.6
Date-Time
  
  1025   Fri Oct 3 19:38:02 2008 robMetaphysicsEnvironmentThe Gatekeeper
Found this lady outside the door of the 40m
lab a few nights ago.
 DSC_0409.JPG 
  1026   Sat Oct 4 07:23:42 2008 KojiMetaphysicsEnvironmentThe GatekeeperHi, this is Koji from Japan.

I am afraid that this is a poisonous spider,
  
  1161   Mon Nov 24 19:15:16 2008 rana, alberto, johnConfigurationEnvironmenttemperatureThe PSL Room Temperature was alarming because
it had gone above 23 C. This set off an unfortunate
chain of events:
  
  1163   Tue Nov 25 19:29:15 2008 rana, alberto, johnConfigurationEnvironmenttemperature[quote]The PSL Room Temperature was alarming
because it had gone above 23 C. This set
off an unfortunate chain of events:
  
  1164   Thu Nov 27 22:56:42 2008 ranaConfigurationEnvironmenttemperature8-)  mc.png 
  1209   Wed Dec 31 22:59:40 2008 YoichiSummaryEnvironmentParticle counts going crazyYes it is a new year's eve, and a lot of crazy
people are on Colorado to secure seats for
the parade tomorrow.
  
  1211   Thu Jan 1 01:07:03 2009 YoichiSummaryEnvironmentParticle counts going crazyI increased the fan speed of the PSL HEPA
filter to the maximum.
  
  1512   Thu Apr 23 18:09:11 2009 YoichiUpdateEnvironmentEffect of cryopumpThe attached is the trend plot of the MC1
accelerometer for 3 days.
It is evident that the seismic level increased
 SeisTrend.pdf 
  1513   Thu Apr 23 21:13:37 2009 YoichiSummaryEnvironmentMag. 4 earthquake in LA tripped the watchdogs of the most optics So far, no damage is noticeable.
restoreWatchdog script was useful :-)
  
  1539   Fri May 1 18:51:34 2009 AlbertoSummaryEnvironmentearthquakeEarthquake 4.4 Leo Carrillo Beach.
Some of the watchdogs tripped out.
  
  1594   Sun May 17 20:50:38 2009 robOmnistructureEnvironmentmag 5.0 earthquake in inglewood2009 May 18  03:39:36 UTC



   Details
  
  1596   Sun May 17 23:22:19 2009 ranaUpdateEnvironmentseisBLRMS for the past 3 weeksLooks like Chris Wipf's fix of using fclose
worked for the NDS client.
The attached plot shows the minute trend
 Untitled.png 
  1613   Wed May 20 10:43:17 2009 steveOmnistructureEnvironmentaccelerometers sensitivity


   
        
            
 eq5m4.jpg 
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