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  40m Log, Page 15 of 335  Not logged in ELOG logo
ID Date Author Type Category Subject Text Attachments
  16158   Mon May 24 20:55:00 2021 KojiSummaryBHDHow to align two OMCs on the BHD platform?Differential
misalignment of the OMCs

40m BHD will employ two OMCs on
  
  16157   Mon May 24 19:14:15 2021 Anchal, PacoSummarySUSMC1 Free Swing Test set to triggerWe've set a free swing test to trigger
at 3:30 am tomorrow for MC1. The script for
tests is running on tmux session named 'freeSwingMC1'
  
  16156   Mon May 24 10:19:54 2021 PacoUpdateGeneralZita IOO stripUpdated IOO.strip on Zita to show WFS2
pitch and yaw trends (C1:IOO-WFS2_PIY_OUT16
 Screenshot_from_2021-05-24_18-09-37.png24and25_05_2021_PEM_BS_10_30.png 
  16155   Mon May 24 08:38:26 2021 ChubUpdateElectronics18-bit AI, 16-bit AI and 16-bit AA- High priority units: 2x 18AI / 1x 16AI
/ 3x 16AA

All six are reworked and on the
  
  16154   Sun May 23 18:28:54 2021 JonUpdateCDSOpto-isolator for c1auxeyThe new HAM-A coil drivers have a single
DB9 connector for all the binary inputs.
This requires that the dewhitening switching signals
  
  16153   Fri May 21 14:36:20 2021 Ian MacMillanUpdateCDSSUS simPlant modelThe plant transfer function of the pendulum
in the s domain is:

 Plant_Mod_TF.pdf 
  16152   Fri May 21 12:12:11 2021 PacoUpdateNoiseBudgetAUX PDH loop identification[Anchal, Paco]

We went into 40m to identify where
XARM PDH loop control elements are. We didn't
  
  16151   Fri May 21 09:44:52 2021 Ian MacMillanUpdateCDSSUS simPlant modelThe transfer function given in the previous
post was slightly incorrect the units
did not make sense the new function is:
 Transfer_Function_of_Damped_Harmonic_Oscillator.pdf 
  16150   Fri May 21 00:15:33 2021 KojiUpdateElectronicsDC Power Strip delivered / storedDC Power Strip Assemblies delivered and
stored behind the Y arm tube (Attachment
1)
 9x 
  16149   Fri May 21 00:05:45 2021 KojiUpdateSUSNew electronics: Sat Amp / Coil Drivers11 new Satellite Amps were picked up from
Downs. 7 more are coming from there. I have
one spare unit I made. 1 sat amp has already
 F3CDEF8D-4B1E-42CF-8EFC-EA1278C128EB_1_105_c.jpeg 
  16148   Thu May 20 16:56:21 2021 KojiUpdateElectronicsProduction version of the HV coil driver tested with KEPCO HV suppliesHP HV power supply ( HP6209
) were returned to Downs
 P_20210520_154523_copy.jpg 
  16147   Thu May 20 10:35:57 2021 AnchalUpdateSUSIMC settings revertedFor future reference, the new settings
can be upoaded from a script in the same
directory. Run python /users/anchal/20210505_IMC_Tuned_SUS_with_Gains/uploadNewConfigIMC.py
  
  16146   Wed May 19 18:29:41 2021 KojiUpdateSUSMass Properties of SOS Assembly with 3"->2" Optic sleeve, in SI unitsCalculation for the SOS POS/PIT/YAW resonant
frequencies

- Nominal height gap between the
 SOS_resonant_freq.pdfSOS_resonant_freq.nb.zip 
  16145   Tue May 18 20:26:11 2021 ranaUpdatePSLHEPA speed raisedFluke. Temp fluctuations
are as usual, but the overall temperature
is still lower. We ought to put some temperature
  
  16144   Tue May 18 00:52:38 2021 ranaUpdatePSLHEPA speed raisedLooks like the fan lowered the temperature
as expected. Need to get a few more days
of data to see if its stabilized, or if that's
 Untitled.png 
  16143   Sat May 15 14:54:24 2021 gautamUpdateSUSIMC settings revertedI want to work on the IFO this weekend,
so I reverted the IMC suspension settings
just now to what I know work (until the new
 MC2coilOut.png 
  16142   Sat May 15 12:39:54 2021 gautamUpdatePSLNPRO tripped/switched offThe NPRO has been off since ~1AM this morning
it looks like. 
 NPRO.png 
  16141   Fri May 14 17:45:05 2021 ranaUpdatePSLHEPA speed raisedThe PSL was too hot, so I turned on the
south HEPA on the PSL. The north one was
on and the south one was off (or so slow
  
  16140   Fri May 14 03:29:50 2021 KojiUpdateElectronicsHV Driver noise test with the new HV power supply from MatsusadaI believe I did the identical test with
the one in [40m
ELOG 15786]. The + input of PA95 was
 HV_Driver_PSD.pdf 
  16139   Thu May 13 19:38:54 2021 AnchalUpdateSUSMC1 Satellite Amplifier Debugged[Anchal Koji]

Koji and I did a few tests with
an OSEM emulator on the satellite amplifier
 MC1_UL_Channel_Fixed.png 
  16138   Thu May 13 11:55:04 2021 Anchal, PacoUpdateSUSMC1 suspension misbehavingWe came in the morning with the following
scene on the zita monitor:

 Screenshot_from_2021-05-13_09-50-24.pngMC1_Glitches_Invest2.pdf 
  16137   Wed May 12 17:06:52 2021 JordanUpdateSUSMass Properties of SOS Assembly with 3"->2" Optic sleeve, in SI unitsHere are the mass properties for the only
the test mass assembly (optic, 3" ring,
and wire block). (Updated with g*mm^2)
 Moments_of_Inertia_SI.PNG 
  16136   Wed May 12 16:53:59 2021 KojiUpdateSUSMass Properties of SOS Assembly with 3"->2" Optic sleeve, in SI unitsNo, this is the property of the suspension
assembly. The mass says 10kg

Could you do the same for the testmass
  
  16135   Wed May 12 14:23:20 2021 JordanUpdateSUSMass Properties of SOS Assembly with 3"->2" Optic sleeve, in SI units   Moments_of_Inertia_SI.PNG 
  16134   Wed May 12 13:06:15 2021 Ian MacMillanUpdateCDSSUS simPlant modelWorking with Chris, we decided that it
is probably better to use a simple filter
module as a controller before we make the
 SimplePlant_SingleContr.pdfx1sup_isolated.pdfX1SUP_ISOLATED_GDS_TP.pngX1SUP_ISOLATED_C1_SUS_SINGLE_PLANT_Plant_POS_Mod.png 
  16133   Wed May 12 11:45:13 2021 Anchal, PacoSummarySUSNew IMC Settings are miserableWe picked a few parameters from 40m summary
page and plotted them to see the effect of
new settings. On April 4th, old settings
 MC_F_Comparison.pdfMC_TRANS_QPD_Comparison.pdfIMC_REFL_DC_Comparison.pdf 
  16132   Wed May 12 10:53:20 2021 Anchal, PacoUpdateLSCPSL-IMC PDH Loop and XARM PDH Loop diagramAttached is the control loop diagram when
main laser is locked to IMC and a single
arm (XARM) is locked to the transmitted light
 IMC_SingleArm.pdf 
  16131   Tue May 11 17:43:09 2021 KojiUpdateCDSI/O Chassis AssemblyDid you match the local PC time with the
GPS time?
  
  16130   Tue May 11 16:29:55 2021 JonUpdateCDSI/O Chassis Assembly


Quote:


 Screen_Shot_2021-05-11_at_3.03.42_PM.png 
  16129   Mon May 10 18:19:12 2021 Anchal, PacoUpdateLSCIMC WFS noise contribution in arm cavity length noise, CorrectionsA few corrections to last analysis:


The first plot was not
IMC frequency noise but actually MC_F noise
 ArmCavNoiseContributions.pdf 
  16128   Mon May 10 10:57:54 2021 Anchal, PacoSummaryCalibrationUsing ALS beatnote for calibration, testTest details:


We
locked both arms and opened the shutter for
Yend green laser.
After toggling
 BeatY_ITMY_CalibrationAt57Hz.pdfBeatY_ITMY_CalibrationAt43Hz.pdfBeatY_ITMY_CalibrationAt77Hz.pdf 
  16127   Fri May 7 11:54:02 2021 Anchal, PacoUpdateLSCIMC WFS noise contribution in arm cavity length noiseWe today measured the calibration factors
for XARM_OUT and YARM_OUT in nm/cts and replotted
our results from 16117
 ITMX-XARM_TF.pdfITMY-YARM_TF.pdfArmCavNoiseContributions.pdf 
  16126   Fri May 7 11:19:29 2021 Ian MacMillanUpdateCDSSUS simPlant modelI copied c1scx.mdl
to the docker to attach to the plant using
the commands:
  
  16125   Thu May 6 16:13:39 2021 AnchalSummaryIMCAngular actuation calibration for IMC mirrorsHere's my first attempt at doing angular
actuation calibration for IMC mirrors using
the method descibed in /users/OLD/kakeru/oplev_calibration/oplev.pdf
 IMC_Ang_Act_Cal_Kakeru_Tests.pdf 
  16124   Thu May 6 16:13:24 2021 Ian MacMillanUpdateCDSSUS simPlant modelWhen using mdl2adl I
was getting the error:

  
  16122   Wed May 5 15:11:54 2021 Ian MacMillanUpdateCDSSUS simPlant modelI added the IPC parts back to the plant
model so that should be done now. It looks
like this again here.
  
  16121   Wed May 5 13:05:07 2021 ChubUpdateGeneralchassis delivery from De LeoneAssembled chassis from De Leone placed
in the 40 Meter Lab, along the west wall
and under the display pedestal table. 
 de_leone_del_5-5-21.jpg 
  16120   Wed May 5 09:04:47 2021 AnchalUpdateSUSNew IMC Suspension Damping Gains uploaded for long term testingWe have uploaded the new damping gains
on all the suspensions of IMC. This completes
changing all the configuration to as mentioned
  
  16119   Tue May 4 19:14:43 2021 YehonathanUpdateGeneralOSEMs from KAGRAI put the box containing the untested OSEMs
from KAGRA near the south flow bench on the
floor.
  
  16118   Tue May 4 14:55:38 2021 Ian MacMillanUpdateCDSSUS simPlant modelAfter a helpful meeting with Jon, we realized
that I have somehow corrupted the sitemap
file. So I am going to use the code
  
  16117   Tue May 4 11:43:09 2021 Anchal, PacoUpdateLSCIMC WFS noise contribution in arm cavity length noiseWe redid the WFS noise injection test and
have compiled some results on noise contribution
in arm cavity noise and IMC frequency noise
 ArmCavNoiseContributions.pdfIOO-MC1_PIT_NoiseInjTest2.pdfIOO-MC1_PIT_NoiseInjTest_AWGGUI_Config.png 
  16116   Tue May 4 07:38:36 2021 JonUpdateCDSI/O Chassis AssemblyIOP models created

With all
the PCIe issues now resolved, yesterday I
proceeded to build an IOP model for
 Screen_Shot_2021-05-03_at_4.16.06_PM.png 
  16115   Mon May 3 23:28:56 2021 KojiSummaryGeneralWeird gas leakagr kind of noise in 40m control roomI also noticed some sound in the control
room. (didn't open the MP3 yet)

I'm afraid that the hard disk
  
  16114   Mon May 3 20:36:46 2021 Yehonathan, JonUpdateCDSUpdated c1auxey wiring planIt seemed like the BIO channels were not
working, both the inputs and the outputs.
The inputs were working on the windows machine
  
  16113   Mon May 3 18:59:58 2021 AnchalSummaryGeneralWeird gas leakagr kind of noise in 40m control roomFor past few days, a weird sound of decaying
gas leakage comes in the 40m control room
from the south west corner of ceiling. Attached
 40mNoiseFinal.mp3 
  16112   Mon May 3 17:28:58 2021 Anchal, Paco, RanaUpdateLSCIMC WFS noise contribution in arm cavity length noiseRana came and helped us figure us where
to inject the noise. Following are the characteristics
of the test we did:
 excitationoftheMCanglessothatwecanseesomethingdotpng.pngexcitationoftheMCanglessothatwecanseesomethingdotpngbutthistimeitsMC2.png 
  16111   Mon May 3 16:49:04 2021 YehonathanUpdateBHDSOS assemblyI found a "vice" in the cleanroom
(attachment 1). I used it to push dowel pins
into the last suspension block using some
 20210503_161422.png20210503_161456.jpg 
  16110   Mon May 3 16:24:14 2021 AnchalUpdateSUSIMC Suspension Damping Gains Test Repeated with IMC unlockedWe repeated the same test with IMC unlocked.
We had found these gains when IMC was unlocked
and their characterization needs to be done
 MC1_SusDampGainTest.pdfMC2_SusDampGainTest.pdfMC3_SusDampGainTest.pdf 
  16109   Mon May 3 13:35:12 2021 Ian MacMillanUpdateCDSSUS simPlant modelWhen the cymac is started it gives me a
list of channels shown below. 

  
  16108   Mon May 3 09:14:01 2021 Anchal, PacoUpdateLSCIMC WFS noise contribution in arm cavity length noiseLock
ARMs
 WFS1_PIT_Noise_Inj_Test_IMC_unlocked.pdfWFS1_PIT_Noise_Inj_Test_ARM_locked.pdf 
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