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New entries since:Wed Dec 31 16:00:00 1969
IDdown Date Author Type Category Subject Text Attachments
  17038   Tue Jul 26 21:16:41 2022 KojiUpdateComputer Scripts / ProgramsVector fittingI think the fit fails as the measurement
quality is not good enough.

 
  
  17037   Tue Jul 26 20:54:08 2022 PacoUpdateBHDBHD MICH test - LO phase control[Yuta, Paco]


TL;DR
Successfully
 20220726_BICHD.pdf 
  17036   Tue Jul 26 19:50:25 2022 DeekshaUpdateComputer Scripts / ProgramsVector fittingTrying to vectfit to the data taken from
the DFD previously but failing horribly.
I will update this post as soon as I get
 data.pngfit_attempt.png 
  17035   Mon Jul 25 18:22:30 2022 DeekshaSummaryWikiMeasured the PZT TF Successfully Measured the PZT beatnote using the setup
mentioned in elog post 17031. Attached is
the data taken from 10kHz to 1MHz, decadewise
 6x 
  17034   Mon Jul 25 18:09:41 2022 TegaConfigurationBHDBHD Homodyne Phase control MEDM screen[Paco, Tega, Yuta]

Today, we made a custom MEDM screen
for the BHD Homodyne Phase Control, which
 Screen_Shot_2022-07-25_at_6.12.08_PM.pngScreen_Shot_2022-07-25_at_6.18.09_PM.png 
  17033   Mon Jul 25 17:58:10 2022 TegaConfigurationBHDc1sus2 IPC dolphin issue updateFrom the 40m
wiki, I was able to use the instructions
here
 Screen_Shot_2022-07-25_at_5.43.28_PM.pngScreen_Shot_2022-07-25_at_5.21.10_PM.pngScreen_Shot_2022-07-25_at_5.30.58_PM.pngScreen_Shot_2022-07-25_at_5.35.19_PM.png 
  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 
  17030   Mon Jul 25 09:05:50 2022 PacoSummaryGeneralTesting 950nm laser found in trash pile[Paco, Yehonathan]

==== Late elog from Friday ====

Koji provided us with a QFLD-950-3S
 PXL_20220722_234600124.jpgPXL_20220722_234551918.jpg 
  17029   Sun Jul 24 08:56:01 2022 HangUpdateCalibrationError propagation to astrophysical parameters from detector calibration uncertaintySorry I forgot to put tc & phic in
the example. 

I modified astroFisherLib.py
  
  17028   Fri Jul 22 17:46:10 2022 yutaConfigurationBHDc1sus2 watchdog update and DCPD ERR channels[Tega, Yuta]

We have added C1:HPC-DCPD_A_ERR and
 Screenshot_2022-07-22_17-48-25.png 
  17027   Fri Jul 22 17:43:19 2022 KojiUpdateGeneralObtained a functional CRT[Koji Paco]

Koji went to Downs and found a
CRT labeled "for 40m Rana?". So
 PXL_20220723_003631871.jpg 
  17026   Fri Jul 22 15:05:26 2022 TegaConfigurationBHDc1sus2 shared memory and ADC fix[Tega, Yuta]

We were able to fix the shared
memory issue by updating the receiver model
 Screenshot_2022-07-22_15-04-33_DCPD.pngScreenshot_2022-07-22_15-12-19_models.pngScreenshot_2022-07-22_15-15-11_ERR.pngScreenshot_2022-07-22_15-32-19_GDS.png 
  17025   Thu Jul 21 21:50:47 2022 TegaConfigurationBHDc1sus2 IPC updateIPC
issue still unresolved.

Updated shared memory tag so that
  
  17024   Wed Jul 20 18:07:52 2022 PacoUpdateBHDBHD MICH test[Paco, Yuta, JC]

We did some easy tests on the BHD
readout in preparation for BHD MICH. With
 BHD_MICH_OSC.pdf 
  17023   Wed Jul 20 15:58:52 2022 KojiSummaryGeneralJenne laser kaput!For troubleshooting, the proper laser driver
(found beneath the AG network analyzer) was
connected.
  
  17022   Wed Jul 20 14:12:07 2022 PacoSummaryGeneralJenne laser kaput![Koji, Yehonathan, Paco]

Koji pointed out that this laser
was always driven with a current driver (which
  
  17021   Wed Jul 20 11:58:45 2022 PacoSummaryGeneralJenne laser kaput?[Paco, Yehonathan, JC]

We were trying to setup the Jenne
laser to characterize the response of three
  
  17020   Tue Jul 19 18:41:42 2022 yutaUpdateBHDContrast measurements for Michelson and ITM-LO[Paco, Yuta]

We measured contrast of Michelson
 ContrastMeasurements.pdf 
  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 
  17018   Tue Jul 19 16:00:34 2022 yutaConfigurationBHDFast channels for BHD DCPDs now available in c1lsc but not in c1hpc[Paco, Anchal-remote-support, Yuta]

We added fast channels to BHD DC
PDs.
 Screenshot_2022-07-19_14-26-39_c1hpc.pngScreenshot_2022-07-19_14-24-49_c1lsc.pngScreenshot_2022-07-19_15-51-25_GreenGreen.png 
  17017   Tue Jul 19 07:34:46 2022 AnchalUpdateCalibrationError propagation to astrophysical parameters from detector calibration uncertaintyAddressing the comments as numbered:


Yeah, that's correct,
that equation normally 
 BNSparamsErrorwrtfdError.pdfBBHparamsErrorwrtfdError.pdfBNSparamsEPSwrtCalError.pdfBBHparamsEPSwrtCalError.pdf 
  17016   Mon Jul 18 21:41:42 2022 AnchalSummaryLSCFPMI locking procedure using REFL55 and AS55Now that you have found a working configuration,
I suggest we update CARM and DARM filter
banks so that they are used in locking those
  
  17015   Mon Jul 18 18:33:38 2022 KojiUpdateBHDadd Laser RIN to MICH budgetYou should measure the coupling
by noise injection. Noise budgeting does
not need any modeling:
  
  17014   Mon Jul 18 17:07:12 2022 yutaUpdateLSCx4.12 added to ETMX coil outputs to balance with ETMYTo balance the actuation on ETMX and ETMY,
x4.12
was aded to C1:SUS-ETMX_(UL|UR|LR|LL|SD)COIL
  
  17013   Mon Jul 18 16:49:57 2022 YehonathanUpdateBHDadd Laser RIN to MICH budgetI measured the RIN by taking the spectrum
of C1:MC_TRANS_SUMFILT_OUT and
dividing it by the mean count on that channel
 Laser_RIN.pdfMICH_AS55_Noise_Budget.pdf 
  17012   Mon Jul 18 16:39:07 2022 PacoSummaryLSCFPMI locking procedure using REFL55 and AS55[Yuta, Paco]

In summary, we locked FPMI using
REFL55_I, REFL55_Q, and AS55_Q. The key to
 DARM_07_18_2022_FMPI.pdfCARM_07_18_2022_FPMI.pdfMICH_07_18_2022_FPMI.pdffpmi_darm_nb_2022_07.pdf 
  17011   Mon Jul 18 15:17:51 2022 HangUpdateCalibrationError propagation to astrophysical parameters from detector calibration uncertainty1. In the error propogation equation, it
should be \Delta \Theta = -H^{-1} M \Delta
\Lambda, instead of the fractional error. 
  
  17010   Mon Jul 18 04:42:54 2022 AnchalUpdateCalibrationError propagation to astrophysical parameters from detector calibration uncertaintyWe can calculate how much detector calibration
uncertainty affects the estimation of astrophysical
parameters using the following method:
 BNSparamsErrorwrtfdError-merged.pdfBBHparamsErrorwrtfdError-merged.pdfBNSparamsEPSwrtCalError.pdfBBHparamsEPSwrtCalError.pdf 
  17009   Sat Jul 16 02:44:10 2022 KojiUpdateIOOIMC servo tuningI wasn't sure how the IMC servo was
optimized recently. We used to have the FSS
over all gain (C1:PSL-FSS_MGAIN) of +6dB
 ErrorPSD.pdfOLTF.pdfScreen_Shot_2022-07-16_at_03.59.05.png 
  17008   Fri Jul 15 22:36:04 2022 ranaSummaryLSCFPMI with REFL/AS55 demod phase adjustVery nice!   
  17007   Fri Jul 15 19:13:22 2022 PacoSummaryLSCFPMI with REFL/AS55 demod phase adjust[Yuta, Paco]


We first zero the offsets
in ASDC, AS55, REFL55, POX11, and POY11 when
  
  17006   Fri Jul 15 16:20:16 2022 Cici HannaUpdateGeneralFinding UGFI have temporarily abandoned vectfit and
aaa since I've been pretty unsuccessful
with them and I don't need poles/zeroes
 UGF_4042.pngUGF_5650.pngTFSR785_29-06-2022_114042.txtTFSR785_29-06-2022_115650.txt 
  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 
  17004   Thu Jul 14 19:56:15 2022 ranaUpdateIOOmc wfs demodIt looks like Tomislav's measurements
of the WFS demod board noise were actually
of the cable that goes from the whitening
 mcwfs-steps.pdf 
  17003   Thu Jul 14 19:09:51 2022 ranaUpdateGeneralEQ recoveryThere was a EQ in Ridgecrest (approximately
200 km north of Caltech). It was around 6:20
PM local time.
 ETMY-screen.png 
  17002   Thu Jul 14 00:10:08 2022 yutaSummaryLSCFPMI with REFL/AS55 trial continued[Paco, Koji, Yuta]

We managed to lock MICH using REFL55_Q
by setting the demodulation phases and offsets
 AS55_I.pngAS55_Q.pngREFL55_I.pngREFL55_Q.png 
  17001   Wed Jul 13 18:58:17 2022 KojiUpdateIOOIMC suspecionThis is just my intuition but the IMC servo
seems not so optimized. I can increase the
servo gain by 6~10dB easily. And I couldn't
  
  17000   Wed Jul 13 17:30:19 2022 KojiUpdateCDSToo huge script_archiveI wanted to check the script archive to
see some old settings. I found that the script archive
  
  16999   Wed Jul 13 13:30:48 2022 YehonathanUpdateBHDadd Laser RIN to MICH budgetthe main laser noise coupling for a Michelson
is because of the RIN, not the frequency
noise. You can measure the RIN, in MC trans
  
  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
  
  16997   Wed Jul 13 12:49:25 2022 PacoSummarySUSSUS frozen[Paco, JC, Yuta]

This morning, while investigating
the source of a burning smell, we turned
  
  16996   Wed Jul 13 10:54:39 2022 YehonathanUpdateBHDMICH AS55 noise budgetI fixed some mistakes in the budget:

1. The BS pendulum resonance was
corrected from 0.8Hz to 1Hz
 BS_MICH_ACtuation_Calibration.pdfMICH_AS55_Model_Measurement_Comparison.pdfMICH_AS55_Noise_Budget.pdf 
  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 
  16994   Tue Jul 12 19:46:54 2022 PacoSummaryALSHow (not) to take NPRO PZT transfer function[Paco, Deeksha, rana]

Quick elog for this evening:


Rana disabled MC servo
  
  16993   Tue Jul 12 18:35:31 2022 Cici HannaSummaryGeneralFinding Zeros/Poles With VectfitAm still working on using vectfit to find
my zeros/poles of a transfer function - now
have a more specific project in mind, which
  
  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 
  16991   Tue Jul 12 13:59:12 2022 ranaSummaryComputersprocess monitoring: MonitI've installed Monit
on megatron and nodus just now, and will
set it up to monitor some of our common processes.
  
  16990   Tue Jul 12 09:25:09 2022 ranaUpdateIOOIMC WFSMC WFS
Demod board needs some attention.
  
  16989   Tue Jul 12 09:14:50 2022 ranaUpdateBHDMICH AS55 noise budgetLooking good:


I think the notches you
see in he measured noise are a clue as to
  
  16988   Mon Jul 11 19:29:23 2022 PacoSummaryGeneralFinalizing recovery -- timing issues, cds, MC1[Yuta, Koji, Paco]

Restarting
CDS

We were having
  
ELOG V3.1.3-