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New entries since:Wed Dec 31 16:00:00 1969
ID Date Author Typeup Category Subject Text Attachments
  17368   Tue Dec 20 23:32:58 2022 ranaUpdateASCWFS demodulation board modification - further studyThat's great - I think this solution
will be best. Having the PLLs actually gives
us some problems - the square wave action
  
  17371   Wed Dec 21 12:38:32 2022 ChrisUpdateOptimal ControlIMC alignment controller testingThree additional mode cleaner alignment
controllers were tested Sunday night (remotely).
They were run in tandem with the (recently
  
  17373   Wed Dec 28 19:50:06 2022 PacoUpdateCDSAnother CDS crash -- restored by model restartStopped by lab today. Found all suspensions
undamped (even though watchdogs never tripped),
same symptom as CDS crash from earlier this
  
  17375   Fri Dec 30 12:53:47 2022 KojiUpdateGeneral40m avoided the power outageReceived the campus power outage this (Dec
30, 2022) morning.
- ELOG is still up
  
  17378   Tue Jan 3 11:32:32 2023 AnchalUpdateCDSYearly DAQD fix 2023, did not work :(Every year some changes need to be done
manually in a driver c code file for daqd
to work. The gpstime offset needs to be changed
  
  17379   Tue Jan 3 12:10:46 2023 JamieUpdateCDSYearly DAQD fix 2023, did not work :(This
whole procedure is no longer needed after
the CDS upgrade.  We don't do things
  
  17380   Tue Jan 3 15:28:12 2023 JCUpdateOPLEV TablesETMX laser has diedSeems that the ETMX laser died over the
break and took an extended vacation. I swapped
the laser out with one Koji would use to
 Screen_Shot_2023-01-03_at_3.37.07_PM.png 
  17381   Tue Jan 3 16:11:05 2023 KojiUpdateCDSChiara local backupI checked how the local backup of our /cvs/cds
is done. The last backup was taken on 2022-12-15
and it kept failing since 2022-12-16.
  
  17382   Tue Jan 3 17:41:55 2023 KojiUpdateCDSChiara local backupChris modified the fstab so that the disk
is automatically mounted. The key was that
these two disks have an identical UUID and
  
  17383   Wed Jan 4 08:52:11 2023 JCUpdateOPLEV TablesETMX laser has diedKoji mentioned to me that this laser has
a degraded output. I removed this replacement
laser and put in a new laser from the Y Arm
 DACBE2CD-35EB-4314-92FD-71C5270A6961.jpeg45D7AF8F-5955-4036-B8AE-D761C2838408.jpeg 
  17388   Mon Jan 9 19:41:01 2023 AnchalUpdateSUSNull stream (butterfly/pringle) row added and DQedI updated the suspension model (/cvs/cds/rtcds/userapps/trunk/sus/c1/models/lib/sus_single_control_new.dml)
to add a 5th row in the input matrix so that
we can put in the calculated NULL stream
 SUS_Model_Changes.pngMC1_INMATRIX.png 
  17389   Tue Jan 10 15:07:33 2023 JCUpdateGeneralClean Large Optical TableI have been working on cleaning the large
optical table next to the PSL table. I have
placed the known optics along in the optical
 IMG_6465.JPG 
  17391   Tue Jan 10 20:24:29 2023 AnchalUpdateASCWFS demodulation board 111B - Working as expectedI've completed the modifications on
two WFS demod boards. This required replacing
all 8 mixer ICs on each board. I also tuned
 WFS_Board_111B_Test.pdf 
  17393   Wed Jan 11 17:05:55 2023 AnchalUpdateASCWFS demodulation board 112B - Working as expectedThe other modified board 112B has been
fixed and tested now. See the results attached.
The issue was in some malfunctioning OP284
 WFS_Board_112B_Test.pdf 
  17394   Thu Jan 12 10:06:10 2023 PacoUpdateALSDFD discriminant calibration[Paco, Anchal] Log from yesterday
work around 1Y2 rack; note that while this
work was ongoing, TT2 position drifted slowly
 xbeat_dfd.png 
  17396   Thu Jan 12 15:31:27 2023 RadhikaUpdateALSXARM green laser lock debugging[Radhika, Anchal, Paco]

AUX
PDH Loop Stability
 IMG_4166.jpg 
  17397   Thu Jan 12 18:51:17 2023 PacoUpdateALSDFD and Phase tracker AM coupling[Anchal, Paco]

We measured DFD AM coupling; it
seems to be minimum at higher RF input and
 DFD_AM_coupling.pdf 
  17406   Thu Jan 19 20:35:54 2023 AnchalUpdateASCInstalled 2 flipper mirrors for handingl MC reflection beam to cameraToday I installed two flipper mirrors M3
and M4 (see attached photo) to create alternate
route for MC reflection camera beam. Both
 PXL_20230120_041313615.jpg 
  17407   Fri Jan 20 20:13:20 2023 AnchalUpdateASCInstalled 2 flipper mirrors for handingl MC reflection beam to cameraAfter discussions with Yuta, I figured
that a better optical layout is possible
which does not interfere with the existing
 PXL_20230121_035908170.NIGHT.jpg 
  17408   Sat Jan 21 15:32:40 2023 AnchalUpdateASCAS WFS path nominally setI've completed the beam redirection
path for AS beam to WFS heads in a nominal
way. By that I mean that all mirrors (M1,
 PXL_20230121_231740878.NIGHT.jpg 
  17409   Sat Jan 21 18:01:06 2023 AnchalUpdateALSDFD and Phase tracker AM couplingI took transfer function measurement
of DFD AM coupling using noise excitation.


Noise excitation
 BeatYRFAmplitudeNoiseASDwithSimulation.pdfAWGguiSettingsForSimulatedRFAMNoise.pngDFD_AM_to_Hz_Coupling_upto_0p1Hz.pdfDFD_Phase_Tracker_Noise_Due_To_Amplitude_Noise.pdf 
  17411   Mon Jan 23 16:31:23 2023 ranaUpdateALSDFD and Phase tracker AM couplingBoth the TF measurement and the noise measurements
are useful, but the nosie measurement is
much more meaningful. Since we expect the
  
  17412   Mon Jan 23 20:50:58 2023 AnchalUpdateASCAS WFS path beam profiledI measured the expected beam profile by
WFS photodiodes by measuring the beam when
mode cleaner was unlocked from the point
 WFSPathBeamProfile.pdfASFocPathBeamProfile.pdfASPathBeamProfile.pdf 
  17416   Tue Jan 24 21:04:59 2023 AnchalUpdateASCAS WFS path beam profiledI completed the mode matching calculation
today and found good solution with 360.6
mm ROC PLCX lens at -1.2 m from z=0 point.
 ASBeamFocusingLens.png 
  17418   Wed Jan 25 10:02:47 2023 yehonathanUpdate Earthquake, MC3 watchdog trippedWe came this morning and noticed the FSS_FAST
channel was moving very rapidly. Short inspection
showed that MC3 watchdog got tripped. After
  
  17420   Wed Jan 25 12:49:14 2023 RadhikaUpdateALSXARM green laser lock debugging   XEND_PDHservo_boost_on_gain2.pdfXEND_PDHservo_boost_on_gain4.pdfXEND_PDHservo_boost_on_gain6.pdfXEND_PDHservo_boost_on_gain8.pdfXEND_PDHservo_boost_on_gain10.pdf 
  17422   Wed Jan 25 16:58:19 2023 AlexUpdateCamerasRecording CCD camerasThus far, the software needed for the Magewell
video encoder has been successfully installed
on Donatella. OBS studio has also been installed
  
  17424   Thu Jan 26 00:18:54 2023 KojiUpdateCamerasRecording CCD camerasConnect any video signal supported by the
adapter. Use Windows / Mac or any other OS.
If it keeps complaining, contact Magwell
  
  17425   Thu Jan 26 15:56:30 2023 AnchalUpdateASC1X1 -5V sorenson tripped[Yuta, Anchal]




  
  17427   Thu Jan 26 18:20:43 2023 AnchalUpdatePEMHEPA Monitor setup using WFS BLRMSI implemented the BLRMS on WFS1/2_I_PIT/YAW
outputs and using there value, a HEPA state
can be defined. I've currently set it
 HEPA_MONITOR.png 
  17428   Thu Jan 26 23:33:19 2023 KojiUpdateLSCEP30-2 Epoxy bonding for Yuta@OMC Lab
EP30-2 Epoxy bonding of V beam dumps
for LSC PDs.
 PXL_20230127_053113856.jpgPXL_20230127_053145432.jpg 
  17429   Fri Jan 27 11:26:31 2023 ranaUpdatePEMHEPA Monitor setup using WFS BLRMSthis is very exciting! Its the beginning
of the task of reducing vast amounts of PEM
data into human-useful (bite sized) info.
  
  17436   Tue Jan 31 20:49:46 2023 AnchalUpdateALSMoku Phasemeter AM coupling and comparisonModel changes and addition of
Moku Phasemeter

Today
I setup Moku:Pro MP1 with phasemeter app
 ALS_DFD_Phase_Tracker_Mode.pngALS_Moku_Phasemeter_Mode.pngMokuPhaseMeter_AM_Coupling_TF_and_Noise.pdfPhaseMeasurementComparisonWithSimulatedRFsource.pdf 
  17437   Wed Feb 1 09:56:00 2023 RadhikaUpdateALSXARM green laser lock debugging   7x 
  17438   Wed Feb 1 11:52:13 2023 AnchalUpdateALSMoku Phasemeter AM coupling and comparisonI wondered if Moku could have lied about
its noise measurement since the RF source
was the same Moku device. To avoid this bias,
 6x 
  17439   Wed Feb 1 12:55:14 2023 RadhikaUpdateALSXARM green laser lock debuggingI reconnected the green REFL monitor channel
and acquired its spectra when the laser was
(mostly) locked. During the collection window,
 xend_green_locked_final.png 
  17440   Wed Feb 1 14:43:21 2023 JCUpdateVACFalse Nitrogen LeakageChub mentioned to Paco and I that the Nitrogen
seemed to be losing pressure quicker than
usual. After looking over the previous 4
 40mN2.png 
  17442   Thu Feb 2 13:21:39 2023 RadhikaUpdateGeneralMephisto laser interlockToday while aligning optics at the xend,
my knee engaged the AUX laser interlock.
I spent some time trying to disable the interlock,
  
  17444   Fri Feb 3 12:50:47 2023 AnchalUpdateASCAS WFS model changes and phase calibrationModel and medm changes

After
incrementally doing the model changes, I
found out that the model was failing to build
 YARM_WFS_MASTER.pngPXL_20230203_211014833.jpg 
  17445   Fri Feb 3 17:31:34 2023 JCUpdateGeneralVisit from Steve Vass[Steve, Koji, JC]

Steve Vass came by today and was
loaded with information. Here are a couple
  
  17448   Sat Feb 4 14:55:25 2023 AnchalUpdateASCDC sensing matrix for AS WFS for YARMFilter and scripts setup

I
copied IOO_WFS1_I filter bank to AWS_WFS1/2_I/Q
filter banks to copy the dewhitening and
  
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