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ID Datedown Author Type Category Subject Text Attachments
  16961   Tue Jun 28 23:10:34 2022 YehonathanUpdateBHDMeasurement of AS55 demod board conversion factor{Yuta, Yehonathan}

We measured the AS55 demod board
conversion from the amplitude of a 55MHz
  
  16960   Tue Jun 28 22:27:11 2022 YehonathanUpdateBHDMeasurement of input and output electronics noise{Yuta, Yehonathan}

For MICH noise budgeting we measure
the input electronics noise which includes
 input_noise_spectrum.pdfoutput_noise_spectrum.pdf 
  16959   Tue Jun 28 18:53:16 2022 ranaSummaryALSALS beat allan deviation (XARM)what's the reasoning behind using df/f_beat
instead of df/f_laser ?

  
  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 
  16957   Tue Jun 28 17:07:47 2022 AnchalUpdateCalibrationAdded Beatnote channels in demodulation of c1calI added today demodulation of C1:LSC-BEATX/Y_FINE_I/Q
in the c1cal demodulation where different
degrees of freedom can be dithered. For McCal
  
  16956   Tue Jun 28 16:59:35 2022 PacoSummaryALSALS beat allan deviation (XARM)[Paco]

I took ~ 7 minutes of XALS beatnote
data with the XAUX laser locked to the XARM
 xbeat_1340469968.pdffrac_avar_xbeat.pdf 
  16955   Tue Jun 28 16:26:58 2022 CiciSummaryGeneralVector fitting open loop transfer function/Audio cancellation of optical table enclosure[Deeksha, Cici]

We attempted to use vectfit to
fit our earlier transfer function data, and
 vectfit_firstattempt.pngTFSR785_28-06-2022_161937.pdfenclosure_open.MP4enclosure_closed.MP4 
  16954   Tue Jun 28 14:24:23 2022 yutaUpdateBHDBHD DC PD signals now also sent to c1lsc to circumvent IPC error[JC, Yuta]

To circumvent IPC error sending
BHD DC PD signals from c1sus2 to c1lsc, DB9
 C1LSC.JPGC1SUS2.JPGScreenshot_2022-06-28_16-03-16_BHDDCPDcopied.png 
  16953   Tue Jun 28 09:03:58 2022 JCUpdateGeneralOrganizing and CleaningThe plan for
the tools in 40m

As of right now, there are 4 tool
  
  16952   Mon Jun 27 18:54:27 2022 yutaUpdateLSCModulation depths measurement using Yarm cavity scan[Yehonathan, Yuta]
EDITED
by YM on 22:11 June 27, 2022 to correct for
 YarmModIndex.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 
  16950   Mon Jun 27 13:25:50 2022 CiciUpdateGeneralCharacterizing the Transfer Loop[Deeksha, Cici]

We first took data of a simple
low pass filter, and attempted to perform
 TF_measurement_b.pngtransfer_function_mag_fit.pngtransfer_function_phase_fit.pngcontrol_flow.png 
  16949   Mon Jun 27 12:32:45 2022 yutaUpdateIOOWFS issues fixed    
  16948   Sat Jun 25 22:18:41 2022 TomislavUpdateASCSimulation and reality comparisonsIn the attachment please find plots comparing
controller output, local damping output,
and error signals.
 sens_output_comparison_23_6_new.pngcontr_out_comparison_23_6_new.pnglocal_damp_out_comp_23_6_new.png 
  16947   Sat Jun 25 20:23:59 2022 KojiUpdateIOOWFS issuesI could run the WFS servo (6dofs) for more
than 15min by flipping the sign for the MC2
Pit and WFS1 Yaw. (See attachments)
 Screen_Shot_2022-06-25_at_20.23.21.pngScreen_Shot_2022-06-25_at_20.29.24.png 
  16946   Sat Jun 25 14:29:48 2022 AnchalUpdateIOOWFS issuesThis issue is very weird and still unresolved.
Without WFS loops, we'll have to realign
IMC often and we might loose IMC alignment
  
  16945   Fri Jun 24 17:16:59 2022 PacoUpdateALSXAUX cable in control room[JC, Paco]

We took the long BNC cable that
ran from ETMX to ETMY and ran it from ETMX
  
  16944   Fri Jun 24 13:29:37 2022 YehonathanUpdateGeneralOSEMs from KAGRAThe box was given to Juan Gamez (SURF)




  
  16943   Fri Jun 24 12:13:16 2022 JCUpdateIOOWFS issues[Yuta, JC]

It seems that early this morning
MC got very misaligned. Yuta was able to
 WFS.png 
  16942   Thu Jun 23 15:05:01 2022 Water MonitorUpdateUpgradeWater Bottle Refill22:05:02 UTC Jordan refilled his water
bottle at the water dispenser in the control
room.
  
  16941   Wed Jun 22 19:41:13 2022 KojiUpdateLSCDaily alignment work; POY trouble solvedBefore the final measurement of the DC
values for the transmissions, I aligned the
PMC. This made the PMC trans increased from
  
  16940   Wed Jun 22 18:55:31 2022 yutaUpdateLSCDaily alignment work; POY trouble solved[Koji, Yuta]

I found that Yarm cannot be locked
 Screenshot_2022-06-22_17-17-42_XYaligned.pngScreenshot_2022-06-22_18-58-26_Transmission.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 
  16938   Wed Jun 22 14:44:03 2022 AnchalUpdateBHDFixed DC error in c1su2, added new library model for suspensionsThe 0x2000 error in c1su2 happens whenever
we make it and install it as the default
data acquisition rates are too much in the
  
  16937   Tue Jun 21 22:22:37 2022 TomislavUpdateASCPlotsIn the attachment please find a comparison
of error signals of simulation and reality
after including air turbulence as input noise.
 sens_output_comparison_with_air_turbulence.png 
  16935   Tue Jun 21 21:17:16 2022 yutaUpdateBHDRTS models for BHD added but PCIE error remaining[Anchal, Yuta]

RTS
models for BHD homodyne phase control (c1hpc)
 Screenshot_2022-06-21_20-12-55_C1HPC.pngScreenshot_2022-06-21_20-14-56_C1SU2.pngScreenshot_2022-06-21_20-13-38_C1LSC.pngScreenshot_2022-06-21_20-34-44_RED.png 
  16934   Tue Jun 21 18:41:46 2022 TomislavUpdateASCSimulation plotIn the attachment please find a comparison
of error signals of simulation and reality.
For C1:IOO-WFS1/2_PIT_IN1 excess signal ('belly')
 sens_output_comparison.png 
  16933   Tue Jun 21 14:59:22 2022 CiciSummaryGeneralAUX Transfer Function Loop Exploration[Deeksha, Cici]

We learned about the auxillary
laser control loop, and then went into the
  
  16932   Tue Jun 21 14:17:50 2022 yutaConfigurationBHDBHD DCPDs re-routed to c1sus2After discussing with Anchal, we decided
to route BHD related PD signals directly
to ADC of c1sus2, which handles our new suspensions
 C1X07ADC1.JPGBHDDCPDs.JPG 
  16931   Tue Jun 21 08:36:50 2022 AnchalUpdateSUSDiagonalized input matrices for LO1, freeSwing on ITMY and ITMXOver the weekend, I ran freeSwing test
with sequential kicks in specific DOFs for
LO1, ITMY, ITMX. LO1 results were successfully
 SUSInpMatDiag_LO1.pdf 
  16930   Mon Jun 20 19:46:04 2022 TomislavUpdateASCSimulation plotsIn the attachment please find IMC ASC simulation
plots. Let me know what you think, if you
want some other plots, and if you need any
 pit_mot_cl_MCs.pngloc_damp_cl_MCs.pngcontr_output_cl_MCs.pngsens_output_cl_MCs.pngBS_motion_cl_MCs.png 
  16929   Fri Jun 17 16:22:21 2022 yutaUpdateLSCActuator calibration of BS. ITMX, ITMY, updated MICH displacement spectra from c1calFollowing what we have done in 2013 (40m/8242),
actuator calibration was done using MICH.
 6x 
  16928   Fri Jun 17 13:07:08 2022 KojiUpdateBHDComparison of MICH OLTF model with measurementI'm curious why the actual OLTF included
the 60Hz comb...? It is undesirable to have
such structure in the OLTF around the UGF
  
  16927   Fri Jun 17 12:05:32 2022 YehonathanUpdateBHDComparison of MICH OLTF model with measurementI should write down what I didn't include
for completeness:

1. AA filters
  
  16926   Thu Jun 16 19:49:48 2022 CiciUpdateGeneralUsing the SR785[Deeksha, Cici]

We used a python script to collect
data from the SR785 remotely. The SR785 is
  
  16925   Thu Jun 16 18:30:07 2022 AnchalUpdateSUSNew diagonalized input matrices appliedI used the same fre swing data to diagnolize
input matrices of following optics:
MC1, MC2, MC3
 SUSInpMatDiag_MC1_MC2_MC3_BS_IMTX_ETMX_ETMY_AS1_AS4_SR2_PR2_PR3.pdf 
  16924   Thu Jun 16 18:23:15 2022 PacoConfigurationBHDRecovering LO beam in BHD DCPDs[Paco, Yuta]

We recovered the LO beam on the
BHD port. To do this, we first tried reverting
 Screenshot_2022-06-16_18-29-14_BHDLObeamISBACK.png 
  16923   Thu Jun 16 17:40:15 2022 YehonathanUpdateBHDComparison of MICH OLTF model with measurementI made some progress in modeling MICH loop.

Putting all the LSC and SUS filters
together with the MICH Finesse model I constructed
 MICH_Model_Measurement_Comparison.pdf 
  16922   Thu Jun 16 15:29:03 2022 yutaUpdatePSLPMC input beam aligned again, IMC [Paco, Tomislav, Yuta]

Somehow, when we were trying to measure
 Screenshot_2022-06-16_15-27-30.png 
  16921   Wed Jun 15 17:12:39 2022 CiciSummaryGeneralPreparation for AUX Loop Characterization[Deeksha, Cici]

We went to the end Xarm station
and looked at the green laser setup and electronics.
  
  16920   Wed Jun 15 17:03:17 2022 yutaUpdateSUSITMY ULCOIL issue solved, loose connection in sat amp box[Anchal, Yuta]

We fixed the issue of ITMY ULCOIL
 Measured16Ohms.JPGSatAmpTerminator.JPGBAD.JPGSUCCESSFUL_KICK.png 
  16919   Wed Jun 15 15:45:37 2022 yutaUpdateSUSLO1 LLCOIL now working, it was loose connectionWe tracked the issue of LO1 LLCOIL not
actuating LO1, and found that the DB9 cable
from the coil driver to the sat amp was loose.
 Measurement.JPGBAD.JPGScreenshot_2022-06-15_15-59-05.png 
  16918   Wed Jun 15 15:07:07 2022 KojiUpdateSUSLO2 SUS stuck fixedI checked the state of the LO2 suspension.
I found that the coil driver Enable
Mon was all red.
 Screenshot_2022-06-15_15-00-22.pngScreenshot_2022-06-15_15-00-40.png 
  16917   Wed Jun 15 15:03:41 2022 KojiUpdatePSLPMC input beam alignedThe commissioners complained about the
PMC alignment. The PMC input beam was aligned.
It made the transmission improved from 0.72
 Screenshot_2022-06-15_15-03-16.pngPXL_20220615_212304650.jpg 
  16916   Wed Jun 15 07:26:35 2022 JCUpdateVACBeginning Pumpdown[Jordan, JC]

Jordan and I went in to retore
the Vacuum System back to it's original
  
  16915   Tue Jun 14 20:57:15 2022 AnchalUpdateASCYarm ASS working nowI finally got YARM AS to work today. It
is hard to describe what worked, I did a
lot of monkey business and some dirty offset
  
  16914   Tue Jun 14 19:34:06 2022 yutaUpdateSUSResonant frequency identification from the free swing test[JC, Anchal, Yuta]

We are working on resonant frequency
idendification from the free swing test done
 7x 
  16913   Tue Jun 14 18:45:43 2022 AnchalUpdateSUSLO2 lower magnets are stuck in coil, won't come off[Anchal, Yuta]

In the weekend, I ran a free swing
test on all optics. During this test, LO2
  
  16912   Tue Jun 14 08:41:36 2022 JCUpdateOPLEV TablesBS Oplev Table Sketch[JC]

Lately, I have been working on
a 3d sketch of the BS OPLEV Table on SolidWorks.
 BS_OPLEV_Table.PNG 
  16911   Mon Jun 13 20:26:09 2022 yutaUpdateASCYarm ASS re-tuning in progress -part 2-[Anchal, Yuta]

We are still in the progress of re-commissioning
 Screenshot_2022-06-13_20-47-12.pngScreenshot_2022-06-13_20-44-43.png 
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