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ID Date Author Type Category Subject Text Attachments
  15263   Tue Mar 10 19:58:16 2020 yehonathanUpdateSUS I returned the triggering threshold to
normal values (5/3).

  
  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 
  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 
  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.
  
  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 
  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 
  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
  
  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 
  15255   Thu Mar 5 15:03:48 2020 YehonathanUpdateElectronicsPSL Shutter and PMC TRANSPD working[Jon, Yehonathan]

Summary

With the Acromag chassis now permanently
  
  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
  
  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
  
  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
  
  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
  
  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
  
  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 
  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
  
  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 
  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.
  
  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
  
  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 
  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
  
  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
  
  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 
  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 
  15239   Mon Mar 2 16:35:12 2020 gautamUpdateCDSc1psl test statusChannel   
  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 
  15237   Mon Mar 2 16:14:47 2020 gautamUpdateCDSsome target directory cleanup$TARGET_DIR   
  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
  
  15235   Fri Feb 28 10:04:41 2020 gautamUpdatePSLc1psl setup setupSummary:

There are several problems evident
already.
  
  15234   Fri Feb 28 08:05:22 2020 gautamUpdatePSLc1psl setup setupAnd so it begins.

  
  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 
  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
  
  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 
  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
  
  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 
  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.
  
  15227   Wed Feb 26 22:05:06 2020 gautamUpdateIOOIMC checksToday, I did the following tests (and so
was touching electronics/cables at/around
1X2):
  
  15226   Wed Feb 26 21:43:48 2020 JonSummaryBHDProjected IFO noise budget, post-BHD upgradeTo supplement the material presented during
the BHD review, I've put together a projected
noise budget for the 40m. Note these are
 40m_phase_quad.pdf40m_aligo_comp.pdf40m_ampl_quad.pdfnoise_budget.tar 
  15225   Wed Feb 26 17:17:17 2020 YehonathanUpdate Arms DC loss measurements{Yehonathan, Gautam}

In order to measure the loss in
the arm cavities in reflection, we use the
 6x 
  15224   Tue Feb 25 19:58:06 2020 HangUpdateIOOMC2 coil balancing[Yehonathan, Hang]

We did some quick DC balancing
of the MC2 coil drivers to reduce the l2a
  
  15223   Tue Feb 25 16:17:57 2020 Gautam, HangUpdateCDS Seems that the GPS is out of sync on donatella.
We could not get any data from diaggui...
  
  15222   Mon Feb 24 08:36:32 2020 ChubUpdateGeneralHVAC repairThe HVAC people replaced a valve and repaired
the pneumatic plumbing on the roof air handler. 
Temperature has been stable during the day
  
  15221   Sun Feb 23 18:15:22 2020 ranaUpdateALSALS OOL noise and PDHto
make the comparisons meaningfully
  
  15220   Fri Feb 21 20:44:18 2020 shrutiUpdateALSALS OOL noise and PDH[Meenakshi, Shruti]

In order to adjust the relative
phase for PDH locking, we used the Siglent
 ALSNoise.pdfIMG_0086.jpg 
  15219   Fri Feb 21 13:02:53 2020 KojiUpdateALSPDH error signals?Check out this elog:
ELOG
4354
  
  15218   Fri Feb 21 10:59:08 2020 shrutiUpdateALSPDH error signals?   IMG_0082.jpgIMG_0083.jpgIMG_0084.jpgIMG_0085.jpg 
  15217   Wed Feb 19 22:20:22 2020 ranaUpdateALSALS OOL noise with arms lockedCould you please put physical units on
the Y-axis and also put labels in the legend
which give a physical description of what
  
  15216   Tue Feb 18 18:14:59 2020 shrutiUpdateALSALS OOL noise with arms lockedWe proceeded with the trying to measure
the ALS out-of-loop noise of the X arm when
the X arm cavity is green-locked using different
 ALSNoise.pdf 
  15215   Sat Feb 15 12:56:24 2020 YehonathanUpdateIOOIMC Transfer function measurement{Yehonathan, Meenakshi}

We measure the IMC transfer function
using SR785.
 IMCFrequencyResponse.pdfIMCRingdownNormalizedRawdata.pdfIMCREFLPDFits.pdf 
  15214   Fri Feb 14 14:52:41 2020 gautamUpdateALSALS OOL noise with arms lockedUnlikely, the alignment was probably just
not good. I restored the alignment and now
the arms can be locked to IR frequency.
  
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