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ID Date Author Type Category Subjectup Text Attachments
  15418   Fri Jun 19 16:30:09 2020 gautamUpdateASCSome thoughts about ASCSummary:

In ELOG
15368, I had claimed that the POP QPD
 sensingResponse.pdfsensingResponse_torque.pdf 
  14324   Thu Nov 29 17:46:43 2018 gautamUpdateGeneralSome to-dos[koji,
gautam, jon, steve]


We suspect analog voltage
  
  4834   Fri Jun 17 23:20:05 2011 KojiUpdateLSCSome updates of the LSC screenSome updates of the LSC screen
- Signal amplitude monitor for the
PD signals (--> glows red for more than
 screen.png 
  5914   Wed Nov 16 17:29:46 2011 kiwamuUpdateGreen LockingSome updates on the Y end green PDH
    

       
            
 Yarm_fluctuation.png 
  14152   Fri Aug 10 01:10:56 2018 gautamUpdateLSCSome vertex locking restoredFor
the first time after the whirlwind vent,
 PRMIcarrier.png 
  14602   Fri May 10 15:18:04 2019 gautamUpdatePSLSome work on/around PSL table
In anticipation of installing the
new fan on the PSL, I disconencted the old
fan and finally removed
 IMG_7427.JPGIMG_7428.JPGIMG_7429.JPGnewPSLAcro.png 
  14604   Sat May 11 11:48:54 2019 JonUpdatePSLSome work on/around PSL tableI took a look at the error being encountered
by the modbusPSL service. The problem is
that the 
  
  666   Mon Jul 14 10:57:00 2008 KojiFrogsEnvironmentSomeone at 40M sent LHO water of lifeSomeone at the 40m sent Mike@LHO a pound of
peets coffee with the name of Koji Arai.
It was a good surprise! Thanks, we will enjoy
  
  11990   Mon Feb 15 12:28:03 2016 gautamUpdateGeneralSomething has gone wrong - was there a power outage?I came into the 40m a few minutes ago,
and noticed the following (approximately
in this order):
 Vac_15Feb2016.png 
  11991   Mon Feb 15 13:09:33 2016 KojiUpdateGeneralSomething has gone wrong - was there a power outage?Looks like that's the case. LIGO GC
also sent an e-mail that there was a popwer
glitch.
  
  224   Thu Jan 3 12:38:49 2008 robBureaucracyTMISore throat[quote]
I did not feel anything wrong yesterday,
but [COLOR=red]unfortunately I have [/COLOR]
  
  8402   Wed Apr 3 15:00:24 2013 JamieSummaryElectronicsSorensen supplies in LSC rack (1Y2)I investigated the situation of the two
Sorensen supplies in the LSC rack (1Y2). 
They are there solely to supply power to
 20130403_141842.jpg 
  12814   Thu Feb 9 11:22:56 2017 gautamUpdateGeneralSorensens and DIN connections at 1X1I'd like to fix a few things at 1X1
when we plug in the new amplifier for the
29.5MHz modulation signal. 
 Screen_Shot_2017-02-10_at_9.01.46_AM.png 
  341   Tue Feb 26 20:24:04 2008 AndreySummaryTMISorrowAs for that plot of three-dimensional surface,
I indeed was wrong with the axis "Q_ETMX-Q_ITMX"
(I put there wrong string "Q_ITMX-Q_ETMX").
  
  16026   Wed Apr 14 13:12:13 2021 AnchalUpdateGeneralSorry, it was meSorry about that. It must be me. I'll
make sure it doesn't happen again. I
was careless to not check back, no further
  
  16029   Wed Apr 14 15:30:29 2021 ranaUpdateGeneralSorry, it was meMaybe tighten the tensioner on the door
closer so that it closes by itself even in
the low velocity case. Or maybe just use
  
  7751   Tue Nov 27 01:03:42 2012 AyakaUpdateWienerFilteringSound on PSL Last Thursday, I put the speaker
and my laptop in the PSL table, and make
triangular wave sound with the basic frequency
 gauss_psdcoh_mcf.pngtri40_psdcoh_mcf.pnggauss_filters_mcf.pngGauss_estimatefilters_mcf.png 
  7760   Wed Nov 28 23:55:13 2012 AyakaUpdateWienerFilteringSound on PSL I have been searching for the way
we can subtract signal better since I could
see the acoustic coupling signal remains
 tri40_psdcoh_mcf_varioust.pnggauss_psdcoh_mcf_varioust.png 
  14148   Thu Aug 9 02:12:13 2018 gautamUpdateCOCSouth East or West?Summary:

For operating the SRC in the "Signal-Recycled"
tuning, the SRC macroscopic length needs
  
  15624   Tue Oct 13 21:22:29 2020 gautamUpdateGeneralSpace cleared in 1Y1 for new FEs[JV, GV]

We cleared up some space in the
  
  15168   Tue Jan 28 19:12:30 2020 JonConfigurationPSLSpare channels added to c1psl chassisAfter some discussion with Gautam, I decided
to build more spare channels into the new
c1psl machine. This is anticipation of adding
 c1psl_feedthrough_wiring_v2.pdf 
  15615   Tue Oct 6 14:35:16 2020 JordanUpdateVACSpare forepumpsI have placed 3 new in box, IDP 7 forepumps
along the x arm of the interferometer. These
are to be used as spares for both the 40m
  
  12158   Wed Jun 8 13:50:39 2016 jamieConfigurationCDSSpectracom IRIG-B card installed on fb1[EDIT: corrected name of installed card]

We just installed a Spectracom
TSyc-PCIe timing card on fb1.  The
  
  12161   Thu Jun 9 13:28:07 2016 jamieConfigurationCDSSpectracom IRIG-B card installed on fb1Something is wrong with the timing we're
getting out of the symmetricom driver, associated
with the new spectracom card.
  
  15608   Fri Oct 2 12:52:22 2020 gautamUpdateGeneralSpectroscopic grade Isopropanol delivered2x500 ml bottles of spectroscopic grade
isopropanol were delivered. I marked them
with today's date and placed them in
  
  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 
  14531   Wed Apr 10 22:59:22 2019 gautamUpdateIOOSpooled fiberSteve had showed me some stock of long
fibers a while back - they are from Oz Optics,
and are 50m long, and are already spooled
  
  14534   Thu Apr 11 09:05:06 2019 AnjaliUpdateIOOSpooled fiber
Attchment #1,2,3 and 4 shows the
results with frequency modulation of 32 Hz,
140 Hz , 300 Hz and without frequency modulation.
 Frequecy_modulation_32_Hz.pdfFrequecy_modulation_140_Hz.pdfFrequecy_modulation_300_Hz.pdfWithout_modulation.pdfNew_fiber_spool.JPG 
  2864   Sun May 2 15:28:25 2010 KojiUpdateIOOSpot Positions of MC1/MC3Summary
The spot positions on the MC mirrors
were measured with coil balance gains.
 spot_position.png 
  7413   Wed Sep 19 19:38:37 2012 JenneUpdateGeneralSpot centered on BS, ETMY, ETMX[Unni, Manasa, Jenne]
It turned out that the beam was a
teeny bit high in the corner, so we touched
  
  15967   Thu Mar 25 17:39:28 2021 gautamUpdateComputer Scripts / ProgramsSpot position measurement scripts "modernized"I want to measure the spot positions on
the IMC mirrors. We know that they can't
be too far off centerBasically I did the
 MCdecenter202103251735_mcmirror0.pdfMCdecenter202103251735_mcdecenter0.pdf 
  14225   Tue Oct 2 23:57:16 2018 gautamUpdatePonderSqueezeSqueezing scenarios[kevin,
gautam]
 PonderSqueeze_NB_LORIN.pdf 
  13841   Mon May 14 18:58:32 2018 KevinUpdatePonderSqueezeSqueezing with no SRM


Quote:


 homodyne_heatmap.pdfdisplacement_noise.pdfnoise_budget.pdf 
  9116   Fri Sep 6 23:01:08 2013 KojiUpdateLSCStable DRMI lock was recovered from the impact on the RF system modificationSummary
 DRMI.pngSensMat_PRMI_1000cts_580Hz_2013-08-26_235635.pngSensMat_PRMI_1000cts_580Hz_2013-09-06_201137.png 
  2274   Mon Nov 16 15:18:10 2009 haixingUpdateSUSStable magnetic levitation without eddy-current damping


 mag_levi_new.jpgblock_diagram_new.png 
  560   Tue Jun 24 22:43:23 2008 ranaSummarySEIStack TF   Screenshot.png 
  3252   Tue Jul 20 17:38:16 2010 GopalConfigurationOptic StacksStack Type ClarificationsSome clarification is warranted regarding
the different shapes of stacks. Corrections
  
  13821   Mon May 7 15:27:28 2018 gautamUpdateSUSStack measurement expectation[steve,gautam]

We tried to estimate what the load
cell measurement should yield. Here is the
 40m_TMstack.JPG 
  13815   Fri May 4 18:59:39 2018 gautamUpdateSUSStack measurement ongoing[SV,KA,RXA,GV]

The
  
  13846   Tue May 15 21:56:57 2018 gautamUpdateGeneralStack measurement setup decommissioned[steve,koji,gautam]

Since we think we already know
  
  13851   Thu May 17 09:14:38 2018 SteveUpdateGeneralStack measurement setup decommissionedThe final set-up of stack measurment with
3 load
cells and 4 leveling
 Load_Cell_Measurement_Set_Up.jpgETMX_stack_up_down.png 
  4158   Fri Jan 14 17:58:50 2011 OsamuConfigurationGeneralStandalone RT setup I'll be gone to Hanford site next
week and come back to Caltech on 24th's week.
I setup a standalone RT system at
  
  818   Fri Aug 8 17:54:52 2008 JenneUpdateSUSStandoffs and Guide RodsAfter closer inspection of other small optics,
it is clear that the guide rods should be
[SIZE=2]above[/SIZE] the standoffs on our
 SRM_Standoff_and_guide.JPG 
  16419   Thu Oct 21 11:38:43 2021 JordanUpdateSUSStandoffs for Side Magnet on 3" Adapter Ring SOS AssemblyI had 8 standoffs made at the Caltech chemistry
machine shop to be used as spacers for the
side magnets on the 3" Ring assembly.
 Magnet_Standoffs.jpg 
  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
  
  2836   Fri Apr 23 21:02:14 2010 rana, joeUpdateLSCStarted dev of LSC FEJoe and I started working on the new LSC
FE control today. We made a diagram of the
system in Simulink, but were unable to compile
 Untitled.png 
  2839   Sun Apr 25 02:56:07 2010 ranaUpdateLSCStarted dev of LSC FELSC
Plant Model. That is all. 
  
  2840   Sun Apr 25 10:40:21 2010 KojiUpdateLSCStarted dev of LSC FEOnce you made a CDS model, please update
the following wiki page.  This will eventually
help you.
  
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