40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log, Page 338 of 344  Not logged in ELOG logo
ID Date Author Typeup Category Subject Text Attachments
  16869   Mon May 23 13:16:59 2022 PacoUpdateBHDEnd of vent - checks[Paco, Yuta]

Prep for closing and pump down.


Aligned IFO to maximize
 OSEMs20220523.txtScreenshot_2022-05-23_13-24-06_IFOaligned_GTRY_still_clipping_but_less.pngPR3position.JPG 
  16870   Tue May 24 10:37:09 2022 TegaUpdateVACadded FRG channels to slow channel ini file[Vacuum gauge sensors]

Paco informed me that the FRG sensor
EPICS channels are not available on dataviewer,
  
  16871   Tue May 24 11:04:53 2022 JCUpdateVACBeginning Pumpdown[JC, Jordan, Paco, Chub]

We began with the pumpdown this
morning. We started with the annulus volume
 PUMPDOWN-2022-05-24_16-57-59.pngC1VAC_Screenshot_2022-05-24_16-59-27.png 
  16872   Tue May 24 15:21:13 2022 AnchalUpdateBHDFreeswing tests of new SOS startedI modified the script freeSwing.py
to use damping loop output switches to free
the optic instead of watchdog or coil output
  
  16873   Wed May 25 16:38:27 2022 yutaUpdateSUSSuspensions quick health check[JC, Yuta]

We did a quick health check of
suspesions after the pump down.
 Screenshot_2022-05-25_16-46-13.pngOSEMcheck.JPG 
  16876   Thu May 26 15:55:10 2022 TommyUpdateElectronicsRFSoC Power SpectrumFinished building power spectrum analyzer
for the RFSoC. There are two things that
I would like to address down the road. First
 Screen_Shot_2022-06-02_at_2.51.23_PM.png 
  16878   Fri May 27 12:15:30 2022 JCUpdateElectronicsCRT TV / Monitor 6[Yehonathan, Paco, Yuta, JC]

As we were cleaning up this morning,
we heard a high pitch sound that turned into
  
  16879   Fri May 27 15:53:17 2022 TommyUpdateElectronicsRFSoC MTS WorkWith some help from the forums, we printed
the status of the DAC MTS sync and were able
to determined that our board's vivado
  
  16882   Tue May 31 14:44:02 2022 JCUpdateElectronicsCRT TV / Monitor 6[Paco, JC]

Paco and I fixed the ethernet cable
which was hanging. We stopped models c1x07
  
  16883   Tue May 31 17:30:01 2022 YehonathanUpdateBHDGreen shutters fixed[Paco, Yehonathan]

We fixed the slow control over
the green beam shutters.
  
  16884   Wed Jun 1 11:56:28 2022 yutaUpdateALSShutter driver for GRY replaced[JC, Yuta]

We replaced a shutter driver for GRY
 Screenshot_2022-06-01_12-01-53.png 
  16888   Fri Jun 3 15:22:51 2022 yutaUpdateLSCBoth arms locked with POY/POX, IR beam centered on TMs with ASS[JC, Paco, Yuta]

We locked both Y and X arms with POY11
 IRBeamsOnTMs.JPGScreenshot_2022-06-03_15-03-51.png 
  16889   Fri Jun 3 17:42:50 2022 yutaUpdateLSCMICH locks with AS55_QAS path at AP table as re-aligned and confirmed
that MICH can be locked with AS55 Q.
 Screenshot_2022-06-03_17-41-55.png 
  16890   Sun Jun 5 19:46:40 2022 PacoUpdateLSCFixed IMC Trans sum issue[Paco]

Fixed the issue below:

  
  16891   Mon Jun 6 09:37:16 2022 JCUpdateSUSInMatCalc[Paco, JC]

Paco and I attempted to calculate
the input matrices from May 24, 2022, but
  
  16892   Mon Jun 6 13:35:11 2022 PacoUpdateLSCFirst calibrated spectra of MICH at AS55 Q[Paco, Yuta]

On the topic of high AS55_Q RFPD
offset, it seems it stems from a small residual
 Screenshot_2022-06-06_17-30-16_MICHOLTF.pngCalibrated_MICH_ERR.pdf 
  16894   Mon Jun 6 21:01:22 2022 yutaUpdateIMCMC1 OSEM sensor sign flipped, MC1/2/3 free swinging overnight for inmat diagonalization[Tomislav Andric, Rana, Yuta]

We put -1 to MC1 OSEM sensor gains
and re-tuned MC1 damping.
 Screenshot_2022-06-06_21-05-28.png 
  16895   Mon Jun 6 22:08:55 2022 KojiUpdateIMCMC1 OSEM sensor sign flipped, MC1/2/3 free swinging overnight for inmat diagonalizationNote that MC1 has a new style sat amp because
the old one collapsed. The sign flip might
have been the result of the replacement
  
  16896   Tue Jun 7 17:26:21 2022 yutaUpdateSUSITMY ULCOIL mystery not solved[Paco, Yuta]

We investigated the ITMY ULCOIL
issue (40m/16873).
 ULCoilInductance.JPGULCoilResistance.JPGWrongSetting.JPG 
  16897   Tue Jun 7 18:32:46 2022 DeekshaUpdateElectronicsNoise Budgeting ADC (of redpitaya)Made plots on i/p noise of redpitaya .
Need to reconsider sampling frequency (to
improve plot at lower freq)
 ch1_0.5V.pngch2_0.0V.png 
  16898   Tue Jun 7 19:13:12 2022 yutaUpdateSUSAgreement on suspension damping loop polarity conventionsAnchal, Paco and I agreed to follow
the polarity conventions below for suspension
damping loops.
 NoteBeforeChanges.JPG 
  16899   Tue Jun 7 19:40:45 2022 AnchalUpdateSUSITMY changed output matrix to disable use of UL coilSince UL coil actuation is lost, we modified
the output matrix of ITMY to use only UR,
LR and LL face coils for POS, PIT and YAW
 ITMY_PIT_to_POS-PIT-YAW_Coupling.pdfITMY_YAW_to_POS-PIT-YAW_Coupling.pdf 
  16900   Wed Jun 8 16:03:12 2022 KojiUpdateVACPower Outage 220608: Vacuum Recovery=== Observation ===


TP1/2/3 failed. AUX RP
did not survive the power outage (of course)


===
 Screenshot_2022-06-08_16-43-13.png 
  16901   Wed Jun 8 16:33:26 2022 KojiUpdateGeneralPower Outage 220608: HVAC restoredI found the HVACs for the ends were off.
They were turned back on.
  
  16902   Wed Jun 8 16:57:46 2022 KojiUpdateIOOPower Outage 220608: IMC restoredThe IMC alignment was restored and the
IMC is nicely locking.

Once the vacuum level recovered
  
  16903   Wed Jun 8 18:16:20 2022 yutaUpdateSUSITMY ULCOIL mystery: Coil driver swap testTo see if the ULCOIL channel of the ITMY coil driver
is working or not, I swapped ITMY coil
 Screenshot_2022-06-08_18-10-44.pngSWAP.JPG 
  16904   Thu Jun 9 23:08:39 2022 ranaUpdateSUSITMY ULCOIL mystery: Coil driver swap testwhat was the result of the inductance measurement?
should be ~3.3 mH as measured from the flannge
or cable that goes to the flange from sat
  
  16905   Fri Jun 10 13:02:14 2022 yutaUpdateSUSITMY ULCOIL mystery: Coil driver swap testITMY ULCOIL was measured to have ~3.3 mH
as measured from the flange. RTFE 40m/16896
.
  
  16906   Fri Jun 10 13:52:22 2022 JCUpdateOPLEV TablesITMX, ITMY, and Vertex Table Beam PathsI have at taken photos and added arrows
which signify the beam paths for ITMX,
ITMY, and Vertex Oplev tables.
 DCE4F1D7-5AE0-491C-8AF6-F8B659C0787E_1_105_c.jpeg4B24C891-654D-4C51-A8D9-D316364FCF68_1_105_c.jpegF5B115E5-885F-463C-9645-BB2EB73B6144_1_201_a.jpeg 
  16907   Fri Jun 10 15:02:04 2022 yutaUpdateSUSServo gain sign flipped for MC1 WFS reliefThe servo gain for MC1 in /opt/rtcds/caltech/c1/Git/40m/scripts/MC/WFS/reliefWFS
was flipped to account for COIL_GAIN flip
done in 40m/16898.
 Screenshot_2022-06-10_15-04-46.png 
  16908   Fri Jun 10 15:04:23 2022 ranaUpdateSUSITMY ULCOIL mystery: Coil driver swap testIts good that the inductance test passed.
This means that the coil is OK. How does
the inspection photo look? This is the one
  
  16909   Fri Jun 10 20:11:46 2022 yutaUpdateASCYarm ASS re-tuning in progress[Anchal, Yuta]

We tried to re-tune Yarm ASS today.
 Screenshot_2022-06-10_20-10-52.png 
  16910   Fri Jun 10 21:10:01 2022 yutaUpdateSUSITMY ULCOIL mystery: Coil driver swap testWe checked the photos we have, but we didn't
have the photos which show ULCOIL situation
clearly.
  
  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 
  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 
  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
  
  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 
  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
  
  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
  
  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 
  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 
  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 
  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 
  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 
  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 
  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 
  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
  
  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
  
  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
  
  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 
ELOG V3.1.3-