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  40m Log, Page 13 of 329  Not logged in ELOG logo
ID Date Author Type Category Subject Text Attachments
  15981   Wed Mar 31 03:56:37 2021 KojiSummaryElectronicsA bunch of electronics receivedWe have received 9x 18bit DAC adapter boards
(D1000654)
 P_20210331_013257.jpgP_20210331_014020.jpg 
  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 
  15979   Tue Mar 30 18:21:34 2021 JonUpdateCDSFront-end testingProgress today:

Outside Internet access for FE
test stand

This morning Jordan
  
  15978   Tue Mar 30 17:27:04 2021 YehonathanUpdateCDSc1auxey assembly{Yehonathan, Jon}

We poked (looked
in situ with a flashlight, not disturbing
  
  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 
  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
  
  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
  
  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
  
  15973   Mon Mar 29 17:07:17 2021 gautamSummarySUSMC3 new Input Matrix not providing stable loopI suppose you've tried doing the submatrix
approach, where SIDE is excluded for the
face DoFs? Does that give a better matrix?
  
  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 
  15971   Sun Mar 28 14:16:25 2021 AnchalSummarySUSMC3 new Input Matrix not providing stable loopRana asked us to write out here the new
MC3 input matrix we have calculated along
with the old one. The new matrix is not working
 MC3_Input_Matrix_Diagonalization.pdf 
  15970   Fri Mar 26 11:54:37 2021 Paco, AnchalUpdateSUSMC2 Coil Balancing updates[Paco, Anchal]


Today
we spent the morning testing the scripts
  
  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
  
  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
  
  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 
  15966   Thu Mar 25 16:02:15 2021 gautamSummarySUSRepeated measurement of coil Rs & Ls for PRM/BSMethod

Since I am mainly concerned with
the actuator part of the OSEM, I chose to
  
  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
  
  15964   Thu Mar 25 14:58:16 2021 YehonathanUpdateBHDSOS SmCo magnets InspectionRedoing magnet measurement of envelope
1:

  
  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
  
  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 
  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 
  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 
  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
  
  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
  
  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
  
  15956   Wed Mar 24 00:51:19 2021 gautamUpdateLSCSchnupp asymmetryI used the Valera technique to measure
the Schnupp asymmetry to be 
 Lsch.pdf 
  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 
  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 
  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 
  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
  
  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 
  15950   Sun Mar 21 19:31:29 2021 ranaSummaryElectronicsRTL-SDR for monitoring RF noise / interferenceWhen we're debugging our RF system,
either due to weird demod phases, or low
SNR, or non-stationary noise in the PDH signals,
 Screen_Shot_2021-03-21_at_7.43.24_PM.png 
  15949   Fri Mar 19 22:24:54 2021 gautamUpdateLSCPRMI investigations: what IS the matrix??I did all these checks today. 




 IMG_9140.jpgIMG_9141.jpgREFL55.png 
  15948   Fri Mar 19 19:15:13 2021 JonUpdateCDSc1auxey assemblyToday I helped Yehonathan get started with
assembly of the c1auxey (slow controls) Acromag
chassis. This will replace the final remaining
  
  15947   Fri Mar 19 18:14:56 2021 JonUpdateCDSFront-end testingSummary

Today I finished setting
up the subnet for new FE testing. There
are clones of both fb1 and chiara running
 image_72192707_(1).JPGimage_50412545.JPG 
  15946   Fri Mar 19 15:31:56 2021 AidanUpdateComputersActivated MATLAB license on donatellaActivated MATLAB license on donatella   
  15945   Fri Mar 19 15:26:19 2021 AidanUpdateComputersActivated MATLAB license on megatronActivated MATLAB license on megatron   
  15944   Fri Mar 19 11:18:25 2021 gautamUpdateLSCPRMI investigations: what IS the matrix??From Finesse simulation (and also analytic
calcs), the expected PRCL optical gain
is ~1 MW/m (there is a large uncertainty,
  
  15943   Fri Mar 19 10:49:44 2021 Paco, AnchalUpdateSUSTrying coil actuation balance[Paco, Anchal]


We decided to try out the
coil actuation balancing after seeing some
  
  15942   Thu Mar 18 21:37:59 2021 ranaUpdateLSCPRMI investigations: what IS the matrix??
Locked PRMI several tmes after
Gautam setup. Easy w IFO CONFIG screen
 PXL_20210319_045925024.jpg 
  15941   Thu Mar 18 18:06:36 2021 gautamUpdateElectronicsModified Sat Amp and Coil DriverI uploaded the annotated schematics (to
be more convenient than the noise analysis
notes linked from the DCC page) for the 
  
  15940   Thu Mar 18 13:12:39 2021 gautamUpdateComputer Scripts / ProgramsOmnigraffle vs draw.ioWhat is the advantage of Omnigraffle c.f.
draw.io?
The latter also has a desktop app, and for
  
  15939   Thu Mar 18 12:46:53 2021 ranaUpdateSUSTesting of new input matrices with new dataGood Enough! Let's move on with output
matrix tuning. I will talk to you guys about
it privately so that the whole doesn't
  
  15938   Thu Mar 18 12:35:29 2021 ranaUpdatesafetyDoor to outside from control room was unlockedI think this is probably due to the safety
tour yesterday. I beleive Jordan showed them
around the office area and C&B. Not sure
  
  15937   Thu Mar 18 09:18:49 2021 Paco, AnchalUpdateSUSTesting of new input matrices with new data[Paco, Anchal]

Since the new generated matrices
were created for the measurement made last
 MC_Optics_Kicked_Time_Series_1.pdfTEST_Input_Matrix_Diagonalization.pdf 
  15936   Thu Mar 18 07:02:27 2021 KojiUpdateLSCREFL11 demod retrofittingAttachment 1: Transfer Functions

The original circuit had a gain
of ~20 and the phase delay of ~1deg at 10kHz,
 TFs.pdfPSD.pdf 
  15935   Thu Mar 18 01:12:31 2021 gautamUpdateLSCPRFPMi
Integrated >1
hour at RF only control, high circulating
powers tonight.


All
 DARM_OLTF_20210317.pdfCARMTF_20210317.pdfPRFPMI_Mar_17sensMat.pdf 
  15934   Wed Mar 17 16:30:46 2021 AnchalUpdateSUSNormalized Input Matrices plotted better than SURF studentsHere, I present the same input matrices
now normalized row by row to have same norm
as current matrices rows. These now I plotted
 IMC_InputMatrixDiagonalization.pdfNewAndOldMatrices.zip 
  15933   Wed Mar 17 15:04:20 2021 gautamUpdateElectronicsRibbon cable for chassisI had asked Chub to order 100ft ea of 9,
15 and 25 conductor ribbon cable. These arrived
today and are stored in the VEA alongside
 IMG_9139.jpg 
  15932   Wed Mar 17 15:02:06 2021 gautamUpdatesafetyDoor to outside from control room was unlockedI came into the lab a few mins ago and
found the back door
  
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