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ID Dateup Author Type Category Subject Text Attachments
  15228   Wed Feb 26 22:09:52 2020 gautamSummaryBHDProjected IFO noise budget, post-BHD upgradeThe quantum noise curves here are not correct.
c.f. amplitude quadrature noise
budget.
  
  15229   Wed Feb 26 23:50:51 2020 gautamUpdateIOOIMC checksIn the style of the KA characterization
of the CM board, the AO path gain EPICS slider
(IN2) of the IMC servo board was stepped
 sliderCal.pdfAO_inputTFs.pdf 
  15230   Thu Feb 27 15:50:37 2020 gautamUpdateElectronicsFSS box power cable removedIn 1X1, there is a box labelled "FSS
REF" below a KEPCO HV supply. This box
had a power cable that wasn't actually
  
  15231   Thu Feb 27 17:50:36 2020 gautamUpdatePSLc1psl setup setup[many people]

in prep for the install tomorrow,
we did the following:
 20200227_173535.jpg20200227_173454_HDR.jpg20200227_172659.jpg 
  15232   Thu Feb 27 17:59:02 2020 gautamUpdateLSCSome AO thoughtsWhile my checks of the AO signal path have
thrown up some unanswered questions, I don't
think there's any evidence in those measurements
  
  15233   Thu Feb 27 22:45:40 2020 gautamUpdateALSALS noise highThere was some UNELOGGED work at EX today.
The DFD outputs were also hijacked for loss
measurement. Unclear
 ALSnoise.pdf 
  15234   Fri Feb 28 08:05:22 2020 gautamUpdatePSLc1psl setup setupAnd so it begins.

  
  15235   Fri Feb 28 10:04:41 2020 gautamUpdatePSLc1psl setup setupSummary:

There are several problems evident
already.
  
  15236   Fri Feb 28 19:37:18 2020 gautamUpdatePSLNew c1psl installed
The new c1psl Acromag crate is
now interfaced to the Eurocrate electronics
in 1X1 (formerly VME c1psl) and 1X2 (formerly
  
  15237   Mon Mar 2 16:14:47 2020 gautamUpdateCDSsome target directory cleanup$TARGET_DIR   
  15238   Mon Mar 2 16:29:40 2020 gautamUpdateElectronicsc1psl VME crate removed, Acro-crate installed[JV, JWR, YD, GV]


The old c1psl VME crate,
and all the ribbon cables connected to it
 c1psl.pdf 
  15239   Mon Mar 2 16:35:12 2020 gautamUpdateCDSc1psl test statusChannel   
  15240   Mon Mar 2 19:32:41 2020 gautamUpdateCDSc1rfm errorsHad to reboot both end machines and the
c1rfm model to get the TRX and TRY signals
to the LSC models. Now both arms can be locked
 RFMerrors.png 
  15241   Mon Mar 2 23:49:03 2020 JonSummaryBHDProjected IFO noise budget, post-BHD upgradeUpdated noise budget curves, now computed
using the latest version of pygwinc. This
resolves the inconsistency between the gwinc
 40m_phase_quad.pdf40m_ampl_quad.pdf40m_aligo_comp.pdf 
  15242   Tue Mar 3 17:20:14 2020 gautamUpdateElectronicsMore cabling removedJordan and I removed another 10 kg of cabling
from 1X2. The c1iool0 crate now has all cabling
to it disconnected - but it remains in the
  
  15243   Tue Mar 3 17:59:33 2020 YehonathanUpdateElectronicsPSL Shutter and PMC TRANSPD workingI used existing BNC cables running from
the PSL table to the PSL rack and reassigned
them to the PSL Shutter and PMC transmission
  
  15244   Tue Mar 3 18:11:05 2020 JonSummaryBHDProjected IFO noise budget, post-BHD upgradeRevised noise estimates, correcting a couple
of factor of 2 and factor of pi errors found
in the coil driver noise calculation. Also
 40m_phase_quad.pdf40m_ampl_quad.pdf40m_aligo_comp.pdf 
  15245   Tue Mar 3 19:11:48 2020 gautamUpdateLSCSome locking prep
Re-aligned and locked the arm cavities
for IR and green.
Re-set trans
normalization because after the c1iscex
  
  15246   Wed Mar 4 11:10:47 2020 YehonathanUpdateComputersAllegra revivalAllegra had no network cable and no mouse.
We found Allegra'snetwork cable (black)
and connected it.
  
  15247   Wed Mar 4 11:16:37 2020 gautamUpdatePSLPMC realignmentI realigned the input pointing into the
PMC this morning. Usually, the way I do this
is to minimize any discernible mode structure
 PMCrealignment.png 
  15248   Wed Mar 4 12:25:11 2020 gautamUpdateCDSBIO1 on c1psl is deadThere was some work done on the Acro crate
this morning. Unclear if this is independent,
but I found that the IMC servo board IN1
  
  15249   Wed Mar 4 16:18:31 2020 gautamUpdateElectronicsMore cabling removedAfter discussing with Koji, I removed the
PZT driver and associated AI card from the
Eurocrate at 1X2. The corresponding backplane
 1X2EuroBefore.JPGIOO.png 
  15250   Wed Mar 4 16:54:43 2020 gautamUpdateCDSc1auxex temporarily disconnectedTo debug a problem with the new c1psl (later
elog), we needed a Supermicro EPICS server
that was using the shared EPICS/modbus/asyn
  
  15251   Wed Mar 4 20:42:53 2020 gautamUpdateElectronicsC1PSL acromag crate is sitting on the floorJon is going to write up the details of
todays adventures. But
the C1PSL Acromag chassis is sitting on the
  
  15252   Wed Mar 4 21:02:49 2020 KojiUpdateElectronicsMore cabling removedWe are going to replace the old Sun c1ioo
with a modernized supermicro. At the opportunity,
remove the DAC and BIO cards to use them
  
  15253   Wed Mar 4 22:38:31 2020 JonUpdatePSLc1psl communications problem resolvedI investigated the problem
reported earlier today with the BIO1 channels.
By logging the systemd messages generated
  
  15254   Thu Mar 5 11:27:48 2020 gautamUpdateElectronicsC1PSL acromag crate is no longer sitting on the floor[jordan, gautam]

The C1PSL crate has now been installed
  
  15255   Thu Mar 5 15:03:48 2020 YehonathanUpdateElectronicsPSL Shutter and PMC TRANSPD working[Jon, Yehonathan]

Summary

With the Acromag chassis now permanently
  
  15256   Thu Mar 5 19:45:23 2020 JonSummaryPSLC1PSL in-situ test resultsWe've completed
almost all of the in-situ testing of the
c1psl channels. During this
 c1psl_feedthrough_wiring_-_By_Connector_(3).pdf 
  15257   Thu Mar 5 19:51:14 2020 gautamUpdateElectronicsIMC Servo board being testedI am running some tests on the IMC servo
board with an extender card so
  
  15258   Fri Mar 6 01:12:10 2020 gautamUpdateElectronicsIMC Servo IN2 path looks just fineIt seems like the AO path gain
stages on the IMC Servo board work just fine.
The weird results I reported earlier
 AO_inputTFs_5Mar.pdfsliderCal_5Mar.pdf 
  15259   Fri Mar 6 01:19:19 2020 gautamUpdateIOOExcess laser frequency noiseSummary:

Sometime between 1PM and 6PM on
Tuesday, excess laser frequency noise
 MCF.pdfExcessFreqNoise.pdfALSnoise.pdf 
  15260   Fri Mar 6 16:33:11 2020 gautamUpdateIOOExcess laser frequency noiseI did some preliminary debugging of this,
and have localized the problem to the output
path (after MC slow) on the IMC Servo card.
  
  15261   Sat Mar 7 15:18:30 2020 gautamUpdateSUSEQ tripped some suspensionsAn earthquake around 330 UTC (=730pm yesterday
eve) tripped ITMX, ITMY and ETMX watchdogs.
ITMX got stuck. I released the stuck optic
 EQ_6Mar.png 
  15262   Tue Mar 10 14:30:16 2020 yehonathanUpdateSUS ETMX was grossly misaligned.

I re-aligned it and the X arm now
locks.
 Screenshot_from_2020-03-10_19-02-31.png 
  15263   Tue Mar 10 19:58:16 2020 yehonathanUpdateSUS I returned the triggering threshold to
normal values (5/3).

  
  15264   Tue Mar 10 19:59:09 2020 YehonathanUpdateLoss MeasurementArm transfer function measurementI want to measure the transfer function
of the arm cavities to extract the pole frequencies
and get more insight into what is going
 YArmFrequencyResponse.pdf 
  15265   Wed Mar 11 16:46:25 2020 HangUpdateIOOMC2 coil balancingMy old scheme was flawed as I used pitch
as the readback. The pitch signal could not
distinguish the cross-coupling due to coil
  
  15266   Wed Mar 11 18:12:53 2020 gautamSummaryPSLWFS Demod board modifications[koji, gautam]

 D980233-B_Mar2020Mods.pdf 
  15267   Wed Mar 11 21:03:57 2020 KojiUpdateBHDSOS packages from SyracuseI opened the packages send from Syracuse.

- The components are not vacuum
clean. We need C&B.
 P_20200311_203449_vHDR_On.jpg 
  15268   Thu Mar 12 01:33:21 2020 gautamUpdateLSCResuming locking activitiesIt's been a while since I've attempted
any locking, so tonight was mostly getting
the various subsystems back together.
 ExcessFreqNoise_LSC.pdf 
  15269   Thu Mar 12 10:43:50 2020 ranaUpdateLoss MeasurementArm transfer function measurement 
           
  
  15270   Thu Mar 12 11:10:49 2020 YehonathanUpdateGeneralPMC got unlcokedCame this morning to find the PMC was unlocked
since 6AM. Laser is still on, but PMC REFL
PD DC shows dead white constant 0V on PMC
  
  15271   Thu Mar 12 12:44:34 2020 gautamUpdateGeneralPMC got unlcokedOf course the reboot wiped any logs we
could have used for clues as to what happened.
Next time it'll be good to preserve this
  
  15272   Thu Mar 12 16:13:16 2020 gautamUpdatePSLTemperature sensors connected to Acromag[jordan,
gautam]
 P_20200317_153736_vHDR_On_2.jpg 
  15273   Fri Mar 13 00:32:38 2020 gautamUpdateLSCSome progressFinally, some RF only CARM, see Attachment
#1. During this time,
 RFonly_CARM.pngCARMTF.pdf 
  15274   Fri Mar 13 12:48:47 2020 Larry WallaceUpdateelogCert RenewalUpdated the cert in /etc/httpd/ssl.
The new cert is good until March 12, 2022.
  
  15275   Fri Mar 13 14:28:39 2020 gautamUpdatePSLAdded tees to PMC Trans and REFLI want to monitor the PMC TRANS and
REFL levels on the PSL table - previously
there were some cables going to the oscilloscope
  
  15276   Fri Mar 13 20:00:50 2020 JonUpdateComputersLoopback monitoring for slow machinesSummary

Today
I finished implementing loopback monitors
of the up/down state of the slow controls
 Screen_Shot_2020-03-13_at_7.59.55_PM.png 
  15277   Mon Mar 16 15:23:03 2020 YehonathanUpdateLoss MeasurementArm transfer function measurementI measured the cross-calibration of the
two PDs on the PSL table.

I used the existing flip mounted
 Cross_calibration_setup.jpgPDA520overPDA255_Response.pdfYArmFrequencyResponse.pdf 
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