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ID Date Author Typeup Category Subject Text Attachments
  15951   Mon Mar 22 11:57:21 2021 Paco, AnchalUpdateSUSTrying coil actuation balance[Paco, Anchal]


For MC coil balancing we
will use the ASC (i.e. WFS) error signals
 210322_MC1_ASCY.pdfNewandOldMatrices.tar.gz 
  15952   Mon Mar 22 15:10:00 2021 ranaUpdateSUSTrying coil actuation balanceThere's an integrator in the MC WFS
servos, so you should never be disabling
the ASC inputs in the suspensions. Disabling
  
  15953   Mon Mar 22 16:29:17 2021 gautamUpdateASCSome prep for AS WFS commissioning
Added rough cts2mW calibration
filters to the quadrants, see 
 AS_WFS_head.pngWFSquads.pdf 
  15954   Mon Mar 22 19:07:50 2021 Paco, AnchalUpdateSUSTrying coil actuation balanceWe found that following protocol works
for changing the input matrices to new matrices:


Shut the PSL shutter C1:PSL-PSL_ShutterRqst.
 8x 
  15955   Tue Mar 23 09:16:42 2021 Paco, AnchalUpdateComputersPower cycled C1PSL; restored C1PSLSo actually, it was the C1PSL channels
that had died. We did the following to get
them back:
 MCWFS1and2PITYAW.pdfMCWFS1and2PITYAW_Zoomed.pdf 
  15956   Wed Mar 24 00:51:19 2021 gautamUpdateLSCSchnupp asymmetryI used the Valera technique to measure
the Schnupp asymmetry to be 
 Lsch.pdf 
  15957   Wed Mar 24 09:23:49 2021 PacoUpdateSUSMC3 new Input Matrix[Paco]


Found IMC locked upon arrival
Loaded
newest MC3 Input Matrix coefficients using
  
  15958   Wed Mar 24 15:24:13 2021 gautamUpdateLSCNotes on testsFor my note-taking:


Lock PRMI with ITMs as
the MICH actuator. Confirm that the MICH-->PRCL
  
  15959   Wed Mar 24 19:02:21 2021 JonUpdateCDSFront-end testingThis evening I prepared a new 2 TB 3.5"
disk to hold a copy of /opt/rtcds and /opt/rtapps
from chiara. This is the final piece of setup
  
  15960   Wed Mar 24 22:54:49 2021 gautamUpdateLSCNew day, new problemsI thought I'd get started on some of
the tests tonight. But I found that this
problem had resurfaced. I don't know
 PRMI3f_noArmssensMat.pdfREFL55_whtGainStepping.pngREFL55_whtGainStepping2.png 
  15961   Thu Mar 25 11:46:31 2021 Paco, AnchalUpdateSUSMC2 Coil Balancing updatesProof-of-principle


We
excited PIT and YAW dofs using LOCKIN1 in
MC2 on Monday.
We
 CoilActuationBalancing.ipynb.tar.gzMC2_CoilBalancePITnorm_excSamePIT.pdfMC2_CoilBalanceYAWnorm_excSameYAW.pdf20210325_IMC_CoilBalance.tar.gz 
  15962   Thu Mar 25 12:11:53 2021 YehonathanUpdateCDSc1auxey assemblyI finished prewiring the new c1auxey Acromag
chassis (see attached pictures). I connected
all grounds to the DIN rail to save some
 20210325_115500_HDR.jpg20210325_123033.jpg 
  15963   Thu Mar 25 14:16:33 2021 gautamUpdateCDSc1auxey assemblyIt might be a good idea to configure this
box for the new suspension config - modern
Satellite Amp, HV coil driver etc. It's
  
  15964   Thu Mar 25 14:58:16 2021 YehonathanUpdateBHDSOS SmCo magnets InspectionRedoing magnet measurement of envelope
1:

  
  15965   Thu Mar 25 15:31:24 2021 gautamUpdateIOOWFS servosThe servos are almost certainly not optimal
- but we have the IFO sort of working, so
before we make any changes, let's make
  
  15967   Thu Mar 25 17:39:28 2021 gautamUpdateComputer Scripts / ProgramsSpot position measurement scripts "modernized"I want to measure the spot positions on
the IMC mirrors. We know that they can't
be too far off centerBasically I did the
 MCdecenter202103251735_mcmirror0.pdfMCdecenter202103251735_mcdecenter0.pdf 
  15968   Thu Mar 25 18:05:04 2021 gautamUpdateElectronicsStuffed HV coil drivers received from Screaming CircuitsI think the only part missing for assembly
now are 4 2U chassis. The PA95s need to be
soldered on as well (they didn't arrive
  
  15969   Fri Mar 26 10:25:37 2021 YehonathanUpdateBHDSOS assemblyI measure some of the dowel pins we got
from Mcmaster with a caliper.

One small pin is 0.093" in
  
  15970   Fri Mar 26 11:54:37 2021 Paco, AnchalUpdateSUSMC2 Coil Balancing updates[Paco, Anchal]


Today
we spent the morning testing the scripts
  
  15972   Mon Mar 29 10:44:51 2021 Paco, AnchalUpdateSUSMC2 Coil Balancing updatesWe ran the coil balancing procedure 4 times
while iterating through the output matrix
optimization.
 MC2OutMatCrossCouple_Old-to-It3.pdf20210329_MC2_CrossCoupleTest.tar.gz 
  15974   Mon Mar 29 17:11:54 2021 gautamUpdateSUSMC2 Coil Balancing updatesFor this technique to work, (i) the WFS
loops must be well tuned and (ii) the beam
must be well centered on MC2. I am reasonably
  
  15975   Mon Mar 29 17:34:52 2021 ranaUpdateSUSMC2 Coil Balancing updatesI think there's been some mis-communication.
There's no updated Hang procedure, but
there is the one that Anchal, Paco and I
  
  15976   Mon Mar 29 17:55:50 2021 JonUpdateCDSFront-end testingCloning of chiara:/home/cvs underway

I
returned today with a beefier USB-SATA adapter,
which has an integrated 12 V supply
  
  15977   Mon Mar 29 19:32:46 2021 gautamUpdateLSCREFL55 whitening checkoutI repeated the usual whitening board characterization
test of:


driving a signal (using
 REFL55wht.png 
  15978   Tue Mar 30 17:27:04 2021 YehonathanUpdateCDSc1auxey assembly{Yehonathan, Jon}

We poked (looked
in situ with a flashlight, not disturbing
  
  15979   Tue Mar 30 18:21:34 2021 JonUpdateCDSFront-end testingProgress today:

Outside Internet access for FE
test stand

This morning Jordan
  
  15980   Wed Mar 31 00:40:32 2021 KojiUpdateElectronicsElectronics Packaging for assembly workI've worked on packing the components
for the following chassis
- 5 16bit AI chassis
 P_20210330_233508.jpgP_20210330_233618.jpg 
  15982   Wed Mar 31 22:58:32 2021 Anchal, PacoUpdateSUSMC2 Coil Balancing TestA cross-coupling test has been set to trigger
at 05:00 am on April 1st, 2021. The script
is waiting on tmux session 'cB' on
  
  15983   Thu Apr 1 00:50:06 2021 gautamUpdateSUSPRMdiagI spent some time investigating the PRM
this evening, trying out some of the stuff
we discussed in the meeting.
  
  15984   Thu Apr 1 13:56:49 2021 Anchal, PacoUpdateSUSMC2 Coil Balancing Test ResultsThe coil balancing attempt failed. The
off-diagonal values in the measured sensing
matrices either remained the same or increased.
 SDistanceFromIdentity.pdfSmatIterations.pdfTestingExcitationAlongYAW.pdf 
  15985   Thu Apr 1 18:01:06 2021 Anchal, PacoUpdateSUSMC2 Coil Balancing Test Results Success??After fixing a few things we felt were
wrong in our implementation of the algorithm,
we ran the coil balancing for 12 iterations
 SDistanceFromIdentity.pdfSmatIterations.pdfMC2CoilCrossCoupling_opt.png 
  15986   Thu Apr 1 18:16:28 2021 KojiUpdateElectronicsElectronics Packaging for assembly workAll small
components are packed in the boxes. They
are ready to ship.

 
  
  15987   Thu Apr 1 18:48:45 2021 gautamUpdateSUSMC2 Coil Balancing Test Results Success??In these results, can you also include
the new matrix and what the relative imbalances
were?
  
  15988   Thu Apr 1 21:13:54 2021 AnchalUpdateSUSMatrix results, new measurement set to trigger
New
Input matrix used for MC2 (C1:SUS-MC2_INMATRIX_ii_jj


  
  15990   Fri Apr 2 01:26:41 2021 gautamUpdateElectronicsREFL55 chain checkout again, seems fine[koji,
gautam]

Summary:
  
  15991   Fri Apr 2 14:51:20 2021 AnchalUpdateSUSBug found, need to redo the balancingLast run gave similar results as the quick
run we did earlier. The code has been unable
to strike out couplings with POS. We found
  
  15993   Fri Apr 2 15:22:54 2021 gautamUpdateSUSMatrix results, new measurement set to triggerHow should I try to understand why PIT
and YAW are so different? 

  
  15994   Sat Apr 3 00:42:40 2021 gautamUpdateLSCPRFPMI locking with half input powerSummary:

I wanted to put my optomechanical
instability hypothesis to the test. So
 PRFPMIlock_1301464998_1301465238.pdfCARMplant.pdf 
  15995   Mon Apr 5 08:25:59 2021 Anchal, PacoUpdateGeneralRestore MC from early quakes[Paco, Anchal]

Came in a little bit after 8 and
found the MC unlocked and struggling to lock
  
  15996   Mon Apr 5 22:26:01 2021 gautamUpdateLSCPRMI 1f locking (no ETMs) recoveredSince it seems like the entire electronics
chain has no obvious failure, I decided to
compensate for the apparent increased optical
 PRMI_Apr5sensMat_consolidated.pdf 
  15997   Tue Apr 6 07:19:11 2021 JonUpdateCDSNew SimPlant cymacYesterday Chris and I completed setup of
the Supermicro machine that will serve as
a dedicated host for developing and testing
  
  15998   Tue Apr 6 11:13:01 2021 JonUpdateCDSFE testingI/O chassis assembly

Yesterday
I installed all the available ADC/DAC/BIO
modules and adapter boards into the new I/O
  
  15999   Tue Apr 6 15:42:57 2021 YehonathanUpdateBHDSOS assemblyWe got some dumbells from Re-Source Manufacturing
(see attached). I picked 3 in random and
measured their dimensions:
 20210406_150724.png 
  16001   Tue Apr 6 18:46:36 2021 Anchal, PacoUpdateSUSUpdates on recent effortsAs mentioned in last post, we earlier made
an error in making sure that all time series
arrays go in with same sampling rate in CSD
 FirstMeasurementPlots.pdf 
  16003   Wed Apr 7 02:50:49 2021 KojiUpdateSUSFlange InspectionsBasically I went around all the chambers
and all the DB25 flanges to check the invac
cable configurations. Also took more time
  
  16004   Wed Apr 7 13:07:03 2021 JordanUpdateSUSCoM on 3"->2" Adapter Ring for SOSAdding the chamfer around the edge of the
optic ring did not change the center of mass
relative to the plane from the suspension
 CoM_with_Chamfer.pngMoments_of_Inertia.PNG 
  16005   Wed Apr 7 17:38:51 2021 AnchalUpdateSUSTrying to uncouple only PIT and YAW firstTo test if our method is working at all,
we went for the simpler case of just uncoupling
PIT and YAW. This is also because the sensor
 SDistanceFromIdentity.pdfSmatIterations.pdfTimeSeriesPlots.pdfCSDPlots.pdfSmatrixPlots.pdf 
  16006   Wed Apr 7 22:48:48 2021 gautamUpdateIOOWaveplate commissioningSummary:

I spent an hour today evening checking
out the remote waveplate operation. Basic
 remotePowCtrl.pdf 
  16007   Thu Apr 8 17:04:43 2021 Anchal, PacoUpdateSUSFirst Successful Coil BalancingToday, we finally crossed the last hurdle
and got a successful converging coil balancing
run. 
 SDistanceFromIdentity.pdfSmatIterations.pdfSmatrixPlots.pdf 
  16008   Thu Apr 8 20:58:17 2021 KojiUpdateCDSADC adapter boards assembly5x 16bit ADC adapter boards (D0902006)
assembled.
 P_20210408_205411_2_1.jpg 
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