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  40m Log, Page 316 of 341  Not logged in ELOG logo
IDup Date Author Type Category Subject Text Attachments
  15886   Tue Mar 9 14:30:22 2021 YehonathanUpdateSUSOSEM testing for SOSsI finished ranking the OSEMS on the OSEM
wiki page.
  
  15887   Tue Mar 9 14:37:26 2021 gautamSummarySUSPRM suspensionThe PRM got tripped ~5AM this morning.
The cause is unclear - the seismometer reports
elevated activity ~10 minutes before the
 PRMtrip.png 
  15888   Tue Mar 9 15:19:03 2021 KojiUpdateSUSOSEM testing for SOSsHow were the statistics of them? i.e. #
of Good OSEMs, # of OK OSEMs, etc...
  
  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
  
  15890   Tue Mar 9 16:52:47 2021 JonUpdateCDSFront-end testingToday I continued with assembly and testing
of the new front-ends. The main progress
is that the IO chassis is now communicating
 image_72192707.JPG 
  15891   Tue Mar 9 18:49:28 2021 YehonathanUpdateSUSOSEM testing for SOSs29 Good OSEMs, of which 1 is questionable
(089) with PD voltage of 1.5V, 5 need some
work (pigtailing, replace/remove/add screws).
  
  15892   Wed Mar 10 00:32:03 2021 gautamUpdateLSCPRFPMiThe interferometer can nearly be locked
again. I was unable to fully hand off control
from ALS-->RF, I suspect I may be using
 PRMI3f_ALSsensMat.pdf 
  15893   Wed Mar 10 11:46:22 2021 Paco, AnchalSummaryIMCIMC free swinging prep[Paco, Anchal]

# Initial State
- MC is locked. The PRM monitor shows
  
  15894   Wed Mar 10 11:55:22 2021 gautamUpdateSUSPRM suspension suspectThe procedure is that the optic is kicked
to excite it, and allowed to ring down for
~1ksec, with damping turned off. The procedure
 PRM_sensorSpectra.pdfPRM_pkFitNaive.pdfPRM_diagComp.pdf 
  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 
  15898   Wed Mar 10 17:35:47 2021 gautamUpdateSUSSpooky action at a distanceAs I am sitting in the control room, the
PRM suspension watchdog tripped again. This
time, there is clearly no
 PRMtrip.pngPRMtrip_zoom.png 
  15899   Wed Mar 10 19:58:27 2021 gautamUpdateLSCSR785 hooked up to CM boardIn preparation for later today evening.
The TT alignment wasn't visibly disturbed.
  
  15900   Thu Mar 11 01:45:42 2021 gautamUpdateLSCPRFPMi
PRM satellite box indeed seems
to have been the culprit - shortly after
I swapped it to the SRM, its shadow sensors
  
  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 
  15902   Thu Mar 11 08:13:24 2021 Paco, AnchalUpdateSUSIMC First Free Swing Test failed due to typo, restarting now[Paco, Anchal]

The triggered code went on at 5:00
am today but a last minute change I made
  
  15903   Thu Mar 11 14:03:02 2021 gautamUpdateLSCAO pathThere is some evidence of weird saturation
but the gain balancing (0.8dB) and orthogonality
(~89 deg) for the daughter board on the REFL11
 IMG_9127.HEIC 
  15904   Thu Mar 11 14:27:56 2021 gautamUpdateCDStimesync issue?I have recently been running into hitting
the 4MB/s data rate limit on testpoints -
basically, I can't run DTT TF and spectrum
 timesync.pngc1lscMods.png 
  15905   Thu Mar 11 18:46:06 2021 gautamUpdateCDScds rebootSince Koji was in the lab I decided to
bite the bullet and do the reboot. I've
modified the reboot script - now, it prompts
 CDSoverview.png 
  15906   Thu Mar 11 20:18:00 2021 gautamUpdateLSCHigh bandwidth POYI repeated the high bandwidth POY locking
experiment.


The "Q" demod
 OLGevolution.pdfinLoopSpec.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 
  15908   Fri Mar 12 03:22:45 2021 KojiUpdateGeneralGaussmeter in the electronics drawerFor magnet strength measurement:
There is a gaussmeter in the flukes'
drawer (2nd from the top). It turns on and
 P_20210311_231104.jpg 
  15909   Fri Mar 12 03:23:37 2021 KojiUpdateBHDDO card (DO-32L-PE) brought from WBI've brought 4 DO-32L-PE cards from
WB for BHD upgrade for Jon.
 P_20210311_232742.jpgP_20210311_232752.jpg 
  15910   Fri Mar 12 03:28:51 2021 KojiUpdateCDScds rebootI want to emphasize the followings:


FB's RTC (real-time
clock/motherboard clock) is synchronized
  
  15911   Fri Mar 12 11:02:38 2021 gautamUpdateCDScds rebootI looked into this a bit today morning.
I forgot exactly what time we restarted the
machines, but looking at the timesyncd logs,
 timeDrift.png 
  15912   Fri Mar 12 11:44:53 2021 Paco, AnchalUpdatetrainingIMC SUS diagonalization in progress[Paco, Anchal]

- Today we spent the morning shift
debugging SUS input matrix diagonalization.
  
  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
  
  15917   Fri Mar 12 19:44:31 2021 gautamUpdateLSCDelay lineI may want to use the delay line phase
shifter in 1Y2 to allow remote actuation
of the REFL11 demod phase (for the AO path,
  
  15918   Fri Mar 12 21:15:19 2021 gautamUpdateLSCcoronaversary PRFPMiAttachment
#1 - proof that the
 PRFPMI.pngCARM_OLTF.pdf 
  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 
  15920   Mon Mar 15 20:22:01 2021 gautamUpdateASCc1rfm model restartedOn Friday, I felt that the ASC performance
when the PRFPMI was locked was not as good
as it used to be, so I looked into the situation
 RFM.pngCDSoverview.pngRFMchans.pngASCloops.png 
  15921   Mon Mar 15 20:40:01 2021 ranaConfigurationComputersinstalled QTgrace on donatella for dataviewerI installed QTgrace using yum on donatella. Both Grace and  cutiegrace.png 
  15922   Tue Mar 16 14:37:36 2021 YehonathanUpdateBHDSOS SmCo magnets InspectionIn the cleanroom, I opened the nickel-plated
SmCo magnet box to take a closer look. I
handled the magnets with tweezers. I wrapped
 20210316_142906.jpg20210316_165626.jpg20210316_165838.jpg 
  15923   Tue Mar 16 16:02:33 2021 KojiUpdateLSCREFL11 demod retrofittingI'm going to remove REFL11 demod for
the noise check/circuit improvement.

----
 IMG_0545.jpegIMG_0547.jpegD040179-A.pdfIMG_0548.jpegIMG_0550.jpeg 
  15924   Tue Mar 16 16:27:22 2021 JonUpdateCDSFront-end testingSome progress today towards setting up
an isolated subnet for testing the new front-ends.
I was able to recover the fb1 backup disk
  
  15925   Tue Mar 16 19:04:20 2021 gautamUpdateCDSFront-end testingNow that I think about it, I may only have
backed up the root file system of chiara,
and not
  
  15926   Tue Mar 16 19:13:09 2021 Paco, AnchalUpdateSUSFirst success in Input Matric DiagonalizationAfter jumping through few hoops, we have
one successful result in diagonalizing the
input matrix for MC1, MC2 and MC3.
 IMC_InputMatrixDiagonalization.pdfInMatCalcScripts.zip 
  15927   Wed Mar 17 00:05:26 2021 gautamUpdateLSCDelay line BIO remote controlWhile Koji is working on the REFL 11 demod
board, I took the opportunity to investigate
the non-remote-controllability of the 
  
  15928   Wed Mar 17 09:05:01 2021 Paco, AnchalConfigurationComputers40m Control Room Changes
Switched positions of allegra and
donatella.
While doing so, the
hdmi cable previously used by donatella snapped.
  
  15929   Wed Mar 17 10:52:48 2021 JordanUpdateSUS3" Ring Adpater for SOS I have added a .1", 45deg chamfer
to the bottom of the adapter ring. This was
added for a new placement of the eq stops,
 Side_View.pngFront_View.pngRing_with_Modifed_Bracket.pngBack_of_ring.pngFront_of_Ring.png 
  15930   Wed Mar 17 11:57:54 2021 Paco, AnchalUpdateSUSTested New Input Matrix for MC1[Paco, Anchal]

Paco accidentally clicked on C1:SUS-MC1_UL_TO_COIL_SW_1_1
(MC1 POS to UL Coil Switch) and clicked it
 20210317_MC1_InMATtest.pdfMC1_Input_Matrix_Test.tar.gz 
  15931   Wed Mar 17 14:40:39 2021 YehonathanUpdateBHDSOS SmCo magnets InspectionContinuing with envelope number 2




Magnet
  
  15932   Wed Mar 17 15:02:06 2021 gautamUpdatesafetyDoor to outside from control room was unlockedI came into the lab a few mins ago and
found the back door
  
  15933   Wed Mar 17 15:04:20 2021 gautamUpdateElectronicsRibbon cable for chassisI had asked Chub to order 100ft ea of 9,
15 and 25 conductor ribbon cable. These arrived
today and are stored in the VEA alongside
 IMG_9139.jpg 
  15934   Wed Mar 17 16:30:46 2021 AnchalUpdateSUSNormalized Input Matrices plotted better than SURF studentsHere, I present the same input matrices
now normalized row by row to have same norm
as current matrices rows. These now I plotted
 IMC_InputMatrixDiagonalization.pdfNewAndOldMatrices.zip 
  15935   Thu Mar 18 01:12:31 2021 gautamUpdateLSCPRFPMi
Integrated >1
hour at RF only control, high circulating
powers tonight.


All
 DARM_OLTF_20210317.pdfCARMTF_20210317.pdfPRFPMI_Mar_17sensMat.pdf 
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