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ID Date Author Typeup Category Subject Text Attachments
  15889   Tue Mar 9 15:22:56 2021 KojiSummarySUSPRM suspensionI just saw the PRM watchdog tripped
at ~15:20 local (23:20UTC). I restored
the PRM but I saw only the side watchdog
  
  15893   Wed Mar 10 11:46:22 2021 Paco, AnchalSummaryIMCIMC free swinging prep[Paco, Anchal]

# Initial State
- MC is locked. The PRM monitor shows
  
  15895   Wed Mar 10 15:00:16 2021 gautamSummaryIMCIMC free swinging prepDid you fix this issue? It is helpful to
post a screenshot of the offending MEDM screen
in addition to witticisms. The elog says
  
  15896   Wed Mar 10 15:29:58 2021 AnchalSummaryIMCIMC free swinging prepNo we didn't fix the issue. We'll
post some screenshots tomorrow. From "sitemap>Shutter>PSL"
we meant in Shutter medm window, we clicked
  
  15897   Wed Mar 10 15:35:25 2021 Paco, AnchalSummaryIMCIMC free swinging experiment set to trigger at 5:00 amA tmux session named "MCFreeSwingTest"
will run on Rossa. This session is running
script scripts/SUS/freeSwingMC.py (also attached)
 freeSwingMC.py.zip 
  15901   Thu Mar 11 02:10:06 2021 KojiSummaryBHDBHD Platform vertical dimentionsStephen and I discussed the nominal heights
of the BHD platform components.


The beam height from the
 BHD_Platform_Vertical_Dimentions.pdf 
  15907   Fri Mar 12 03:08:23 2021 KojiSummarySUSCoil Rs & Ls for PRM/BS/SRMSummary

Per Gautam's request, I've
checked the coil resistances and inductances.
 P_20210311_224651.jpgP_20210311_225359.jpg 
  15913   Fri Mar 12 12:32:54 2021 gautamSummarySUSCoil Rs & Ls for PRM/BS/SRMFor consistency, today, I measured both
the BS and PRM actuator balancing using the
same technique and don't find as serious
 BS_actuator.pdfPRMact.pdf 
  15914   Fri Mar 12 13:01:43 2021 ranaSummarySUSCoil Rs & Ls for PRM/BS/SRMugh. sounds bad - maybe a short. I suggest
measuring the inductance; thats usually a
clearer measurement of coil health
  
  15915   Fri Mar 12 13:48:53 2021 gautamSummarySUSCoil Rs & Ls for PRM/BS/SRMI didn't repeat Koji's measurement,
but he reports the expected ~3.2mH per coil
on all the BS and PRM coils.
  
  15916   Fri Mar 12 18:10:01 2021 AnchalSummaryComputer Scripts / ProgramsInstalled cds-workstation on allegraallegra had fresh Debian 10 installed on
it already. I installed cds-workstation packages
(with the help of Erik von Reis). I checked
  
  15919   Mon Mar 15 08:55:45 2021 Paco, AnchalSummarytraining [Paco, Anchal]


Found IMC locked upon arrival.
Since
"allegra" was set up as an additional
 IMC_InputMatrixDiagonalization.pdfinputMatrixCalculationMC.tarfreeSwingMC.py.tarSUSfreeswing_1299514263.txt.tar 
  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 
  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
  
  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 
  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?
  
  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 
  15989   Thu Apr 1 23:55:33 2021 KojiSummaryGeneralHEPA AC cord replacementI think
the PSL HEPA (both 2 units) are not running.
The switches were on. And the variac was
  
  15992   Fri Apr 2 15:17:23 2021 gautamSummaryGeneralHEPA AC cord replacementFrom the last failure, I had ordered 2
extra capacitors (they are placed on top
of the PSL enclosure above where the capacitors
  
  16002   Tue Apr 6 21:17:04 2021 KojiSummaryGeneralPSL HEPA investigation- Last week we found both of the PSL HEPA
units were not running.

- I replaced the capacitor of the
 20210406211741_IMG_0554.jpeg20210406211840_IMG_0555.jpeg20210406211850_IMG_0556.jpeg 
  16016   Mon Apr 12 08:32:54 2021 Anchal, PacoSummaryPSLPMC unlocked at 2pm on Sunday; ~ RestoredPMC lost lock between 21:00 and 22:00 UTC
on April 11th as seen in the summary pages:

https://nodus.ligo.caltech.edu:30889/detcharsummary/day/20210411/psl/#gallery-4
  
  16019   Mon Apr 12 18:34:26 2021 YehonathanSummaryPSLPMC unlocked at 2pm on Sunday; ~ RestoredPMC lost lock again at around 16:00 April
12. I was able to lock it again but the transmission
is only 0.6 now and REFL is 0.14.
  
  16060   Wed Apr 21 10:59:07 2021 ranaSummaryCamerasnote on new GigE cam @ 1064Note
from Stephen on more sensitive Baslers.
  
  16070   Thu Apr 22 01:42:38 2021 KojiSummaryElectronicsHV Supply ComparisonNew HV power supply from Company 'M'
has been delivered. So I decided to compare
the noise levels of some HV supplies in the
 HV_Supply_PSD_H.pdfHV_Supply_PSD_K.pdfHV_Supply_PSD_M.pdfHV_Supply_PSD.pdf 
  16095   Thu Apr 29 11:51:27 2021 AnchalSummaryLSCStart of measuring IMC WFS noise contribution in ar cavity length noiseTried locking the arms


Ran IFO > Configure
> ! (YARM) > Restore YARM. Nothing
  
  16101   Thu Apr 29 17:51:19 2021 AnchalSummaryLSCStart of measuring IMC WFS noise contribution in arm cavity length noiset Both arms were locked simply by using
IFO > Configure > ! (YARM) > Restore
YARM. I had to use ASS to improve the TRX/TRY
 WFS1_PIT_exc_80-100Hz_Arms_ASD.pdf 
  16104   Fri Apr 30 00:18:40 2021 gautamSummaryLSCStart of measuring IMC WFS noise contribution in arm cavity length noiseThis is the actuator calibration.
For the error point calibration, you have
to look at the filter in the calibration
  
  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 
  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
  
  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 
  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 
  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 
  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'
  
  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
  
  16159   Tue May 25 10:22:16 2021 Anchal, PacoSummarySUSMC1 new input matrix calculated and uploadedThe test was succesful and brought back
the IMC to lock point at the end.

We calculated new input matrix
 SUS_Input_Matrix_Diagonalization.pdf 
  16161   Tue May 25 17:42:11 2021 Anchal, PacoSummaryALSALS Single Arm Noise BudgetHere is our first attempt at a single-arm
noise budget for ALS.

Attachment 1 shows
 ALS_IR_b.svgALS_Single_Arm_IR.pdf 
  16164   Thu May 27 11:03:15 2021 Anchal, PacoSummaryALSALS Single Arm Noise BudgetHere's an updated X ARM ALS noise budget.

Things to remember:


Major
mistake we were making earlier was that we
 ALS_Single_X_Arm_IR.pdfALS_OOL_with_Ref.pdf 
  16168   Fri May 28 17:32:48 2021 AnchalSummaryALSSingle Arm Actuation Calibration with IR ALS BeatI attempted a single arm actuation calibration
using IR beatnote (in the directions of soCal
idea for DARM calibration)
 SingleArmActCalwithIRALSBeat.pdfstateSpaceModel.zip 
  16171   Tue Jun 1 16:55:32 2021 Anchal, PacoSummaryALSSingle Arm Actuation Calibration with IR ALS BeatRana suggested in today's meeting to
put in a notch filter in the XARM IR PDH
loop to avoid suppressing the excitation
 SingleArmActCalwithIRALSBeat-1306624785.pdf 
  16174   Wed Jun 2 09:43:30 2021 Anchal, PacoSummarySUSIMC Settings characterizationPlot description:


We
picked up three 10 min times belonging to
the three different configurations:

'Old
 seismicX.pdfseismicXtoMC_F_TFest.pdfseismicXtoMC_TRANS_PIT_TFest.pdfseismicXtoMC_TRANS_YAW_TFest.pdf 
  16175   Wed Jun 2 16:20:59 2021 Anchal, PacoSummarySUSIMC Suspension gains reverted to old valuesFollowing the conclusion, we are reverting
the suspension gains to old values, i.e.

  
  16179   Thu Jun 3 17:35:31 2021 AnchalSummaryIMCFixed medm buttonI fixed the PSL shutter button on Shutters
summary page C1IOO_Mech_Shutter.adl. Now
PSL switch changes C1:PSL-PSL_ShutterRqst
 C1IOO_Mech_Shutters.png 
  16190   Mon Jun 7 15:37:01 2021 Anchal, Paco, YehonathanSummaryCamerasMon 7 in Control Room DiedWe found Mon7 in control room dead today
afternoon. It's front power on green
light is not lighting up. All other monitors
  
  16192   Tue Jun 8 11:40:53 2021 Anchal, PacoSummaryALSSingle Arm Actuation Calibration with IR ALS BeatWe attempted to simulate "oscillator
based realtime calibration noise monitoring"
in offline analysis with python. This helped
 ITMX_Cal_Noise_Spectrum_1307143423.pdf 
  16194   Wed Jun 9 11:46:01 2021 Anchal, PacoSummaryAUXXend Green Laser PDH OLTF measurementWe measured the Xend green laser PDH Open
loop transfer function by following method:


We first measured the feedback
 image-6f2923a3-01ce-4d04-bc53-d8db0238e195.jpgimage-72223f4b-3b74-4574-a7ad-de6628a2c5e9.jpgX_Green_ARM_PDH_OLTF.pdf 
  16196   Wed Jun 9 18:29:13 2021 Anchal, PacoSummaryALSCheck for saturation in ITMX SOS DriverWe did a quick check to make sure there
is no saturation in the C1:SUS-ITMX_LSC_EXC
analog path. For this, we looked at the SOS
  
  16197   Thu Jun 10 14:01:36 2021 AnchalSummaryAUXXend Green Laser PDH OLTF measurement loop algebraAttachment 1 shows the closed loop of Xend
Green laser Arm PDH lock loop. Free running
laser noise gets injected at laser head after
 AUX_PDH_LOOP.pdf 
  16198   Fri Jun 11 20:19:50 2021 KojiSummaryBHDBHD OMC invacuum wiringStephen and I discussed the in-vacuum OMC
wiring.

- One of the OMCs has already been
 40mBHD_OMC_wiring.pdf 
  16202   Tue Jun 15 15:26:43 2021 Anchal, PacoSummaryAUXXend Green Laser PDH OLTF measurement loop algebra, excitation at control pointAttachment 1 shows the case when excitation
is sent at control point i.e. the PZT output.
As before, free running laser noise 
 AuxPDHloop.pdf 
  16204   Wed Jun 16 13:20:19 2021 Anchal, PacoSummaryCamerasMon 7 in Control Room ReplacedWe replaced the Mon 7 with an LCD monitor
from back bench. It is fed the analog signal
from BNC converted into VGS with a converter
 IMG_20210616_083810.jpg 
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