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ID Datedown Author Type Category Subject Text Attachments
  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
  
  16987   Mon Jul 11 17:41:52 2022 KojiHowToVACStartup after Power Outage- Once the FRG gauge readings are back
(see next elog by Tega), I could open V1
to pump down the main vacuum manifold.
 Screen_Shot_2022-07-11_at_18.13.00.png 
  16986   Mon Jul 11 17:25:43 2022 TegaUpdateVACfixed obsolete reference bug in serial_XGS600 serviceKoji noticed that the FRG sensors were
not updating due to reference to an
obsolete modbusIOC_XGS service, which was
  
  16985   Mon Jul 11 15:26:12 2022 JCHowToVACStartup after Power Outage[Koji, Jc]

Koji and I began starting that
Vacuum system up.
  
  16984   Mon Jul 11 11:56:40 2022 he YehonathanUpdateBHDMICH AS55 noise budgetI calculated a noise budget for the MICH
using AS55 as a sensor. The calculation includes
closed-loop TF calculations.
 Control_Diagram.pdfMICH_AS55_Noise_Budget.pdf 
  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
  
  16982   Fri Jul 8 23:10:04 2022 KojiSummaryGeneralJuly 9th, 2022 Power Outage Prep The 40m team worked on the power outage
preparation. The detailed is summarized on
this wiki page. We will still be able to
  
  16981   Fri Jul 8 16:18:35 2022 ranaUpdateLSCActuator calibration of MC2 using Yarmalthough I know that Yuta knows this, I
will just put this here to be clear: the
NNN/f^2 calibration is only accurate abouve
  
  16980   Fri Jul 8 14:03:33 2022 JCHowToVACVacuum Preparation for Power Shutdown [Koji, JC]

Koji and I have prepared the vacuum
system for the power outage on Saturday.
 Screen_Shot_2022-07-12_at_7.02.14_AM.png 
  16979   Thu Jul 7 21:25:48 2022 TegaSummaryCDSUse osem variance to turn off SUS damping instead of coil outputs[Anchal, Tega]

Implemented
ramp down of coil bias voltage when
  
  16978   Thu Jul 7 18:22:12 2022 yutaUpdateLSCActuator calibration of MC2 using Yarm(This is also
a restore of elog 40m/16971
from Jul 5, 2022 at 17:36)
 TF.pngMC2.png 
  16977   Thu Jul 7 18:18:19 2022 yutaUpdateLSCActuator calibration of ETMX and ETMX(This is a
complete restore of elog 40m/16970
from July 5, 2022 at 14:34)
 Screenshot_2022-07-05_14-52-01_OLTF.pngScreenshot_2022-07-05_14-54-03_TF.pngScreenshot_2022-07-05_14-56-41_Ratio.png 
  16976   Wed Jul 6 22:40:03 2022 TegaSummaryCDSUse osem variance to turn off SUS damping instead of coil outputsI updated the database
files for the 7 BHD optics to separate
the OSEM variance trigger and the LATCH_OFF
  
  16975   Wed Jul 6 19:58:16 2022 PacoSummaryNoiseBudgetXARM noise budget[Anchal, Paco, Rana]

We locked the XARM
using POX11
 xarm_nb_2022_07.pdf 
  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 
  16973   Wed Jul 6 15:28:18 2022 TegaUpdateSUSOutput matrix diagonalisation : F2P coil balancinggit repo : https://git.ligo.org/40m/scripts/-/tree/main/SUS/OutMatCalc

local dir: 
  
  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 
  16969   Fri Jul 1 12:49:52 2022 KojiUpdateIOOMC2 seemed misaligned / fixedI found the IMC was largely misaligned
and was not locking. The WFS feedback signals
were saturated and MC2 was still largely
 C1-MULTI_FBDB3F_TIMESERIES-1340668818-86400.pngC1-LOCKED_MC_5E4267_TIMESERIES-1340668818-86400.png 
  16968   Fri Jul 1 08:50:48 2022 yutaSummaryLSCFPMI with REFL/AS55 trial[Anchal, Paco, Yuta]

We tried to lock FPMI with REFL55
and AS55 this week, but no success yet.
  
  16967   Thu Jun 30 19:24:24 2022 ranaSummaryPEMeffect of nearby CES constructionFor the proposed construction in the NW
corner of the CES building (near the 40m
BS chamber), they did a simulated construction
  
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