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New entries since:Wed Dec 31 16:00:00 1969
ID Dateup Author Type Category Subject Text Attachments
  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 
  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.
  
  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 
  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 
  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 
  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 
  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 
  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 
  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
  
  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 
  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 
  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 
  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
  
  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 
  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 
  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
  
  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.
  
  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 
  16944   Fri Jun 24 13:29:37 2022 YehonathanUpdateGeneralOSEMs from KAGRAThe box was given to Juan Gamez (SURF)




  
  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
  
  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
  
  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 
  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 
  16949   Mon Jun 27 12:32:45 2022 yutaUpdateIOOWFS issues fixed    
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