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ID Date Author Type Category Subjectup Text Attachments
  17279   Thu Nov 17 14:12:58 2022 yutaSummaryBHDOptical gain calibrations for BHD MICH with lower UGF[Paco, Yuta]

We found that MICH UGF was unexpectedly
 Screenshot_2022-11-17_14-39-17_MICHLOPHASEOLTF.pngScreenshot_2022-11-17_14-41-40_LowUGFConfiguration.png 
  12104   Mon May 2 19:14:18 2016 gautamUpdateendtable upgradeOptical layout almost completeWith Steve's help, I installed the
Oplev earlier today. I adjusted the positions
of the two lenses until I deemed the spot
 ETMX_wedge.pdf 
  12122   Thu May 19 16:29:20 2016 SteveUpdateendtable upgradeOptical layout almost complete 

 
 ETMX_4x3_closed.jpgsealedETMXenclosure.jpg 
  7090   Mon Aug 6 11:07:06 2012 ManasaUpdate40m UpgradingOptical layout updatedACAD files of the 40m optical layout have
been updated as per the vent in Aug 2011.
Files are available at the 40m svn
  
  7125   Wed Aug 8 20:51:56 2012 ManasaUpdate40m UpgradingOptical layout updated

    

       
            
  
  7222   Fri Aug 17 18:49:55 2012 ManasaUpdate40m UpgradingOptical layout updated

    

       
            
  
  13432   Thu Nov 16 13:57:01 2017 gautamUpdateOptical LeversOptical lever noiseI disabled the OL loops for ITMX, ITMY
and BS at GPStime 1194897655 to come up with
an Oplev noise budget. OL spots were reasonably
 VertexOLnoise.pdfITMYvsSRM.pdf 
  13433   Thu Nov 16 15:43:01 2017 ranaUpdateOptical LeversOptical lever noiseI bet the calibration
is out of date; probably we replaced the
  
  13156   Tue Aug 1 16:05:01 2017 gautamUpdateOptical LeversOptical lever tuning - cost function constructionSummary:

I've been trying
 loopPerformance.pdfOplevLoop.pngOL_errSigs.pdfDAC_saturation.pdf 
  13141   Tue Jul 25 02:03:59 2017 gautamUpdateOptical LeversOptical lever tuning thoughtsSummary:

Currently, I am unable to engage
the coil-dewhitening filters without destroying
  
  13147   Fri Jul 28 15:36:32 2017 gautamUpdateOptical LeversOptical lever tuning thoughtsAttachment #1 - Measured
error signal spectrum
 errSig.pdfQPD_simulink.pngfeedbackTopology.pdf 
  14733   Mon Jul 8 17:33:10 2019 KruthiUpdateLoss MeasurementOptical scattering measurementsI came across a paper (see reference) where
they have used DAOPHOT, an astronomical software
tool developed by NOAO, to study the point
  
  7774   Sat Dec 1 16:58:14 2012 ManasaUpdateWIKI-40M UpdateOptical tablesI have updated the wiki with the layout
of the out-of-vac optical tables: Updated
  
  3287   Sun Jul 25 18:47:23 2010 AlbertoUpdateSVNOptickle 40mUpgrade model updated to include short cavity length correctionsI uploaded an updated optickle model of
the upgrade to the SVN directory with the
optickle models (here).
  
  643   Mon Jul 7 19:15:38 2008 AlbertoUpdateGeneralOptics alignement on the ABS length experimentToday I started setting up the PLL instruments
to lock the frequency of the NPRO beam to
the IFO beam. with no need of a new alignment
  
  7313   Wed Aug 29 21:02:45 2012 JenneUpdateIOOOptics between Faraday and PRM are centered, realigned[Jenne, Suresh, with support from Jamie
and Koji]
MC spots measured, MC1, MC3 no change.
  
  5729   Mon Oct 24 17:23:14 2011 SUS_DiagonalizerUpdateSUSOptics kickedThis is a cron-elog test. No optics have been
kicked.
  
  5823   Sun Nov 6 09:39:25 2011 Dr. SUSUpdateSUSOptics kickedAll suspended optics have been kicked at Sun
Nov  6 09:39:25 PST 2011. Watchdogs will
be reengaged in 5 hours. Please refrain from
  
  7523   Wed Oct 10 21:50:39 2012 SUS_DiagonalizerUpdateSUSOptics kickedAll suspended optics have been kicked at Wed
Oct 10 21:50:39 PDT 2012. Watchdogs will
be reengaged in 90 minutes. 
  
  7524   Thu Oct 11 00:22:58 2012 SUS_DiagonalizerUpdateSUSOptics kicked[quote]All suspended optics have been kicked
at Wed Oct 10 21:50:39 PDT 2012. Watchdogs
will be reengaged in 90 minutes. [/quote]
  
  7979   Thu Jan 31 22:14:11 2013 ranaSummaryASCOptics lit Gouy not Guoy:
http://www.rp-photonics.com/gouy_phase_shift.html
pronounced Goo-eee, with the emphasis
  
  7982   Fri Feb 1 12:22:27 2013 ZachSummaryASCOptics litIt's OK; even Siegman got it wrong---48
times.
RA: NO, stil not OK.
  
  13981   Mon Jun 18 14:32:42 2018 gautamUpdatePSLOptics on AS tableYesterday, I moved the following optics:


Lens in front of AS110
PD.
BS splitting light between
  
  13982   Mon Jun 18 15:59:17 2018 johannesUpdatePSLOptics on AS table


Quote:


  
  13983   Mon Jun 18 16:57:54 2018 KojiUpdatePSLOptics on AS tableOf course, many (but no all) of the optics
were custom-ordered back in ~2000.
  
  14006   Fri Jun 22 14:18:04 2018 SteveUpdatePSLOptics on AS table 




  
  10454   Thu Sep 4 18:30:13 2014 GabrieleSummaryASCOptimal Gouy phase for POP QPD Jenne asked me to simulate the signals
on POP QPD when moving different mirrors,
as a function of the Gouy phase where the
 pop_qpd_dc.pngfortymeters.mistfortymeters_pop_qpd.mistpop_qpd.m 
  11407   Tue Jul 14 10:23:27 2015 IgnacioUpdateGeneralOptimal detector array placement thoughtsOver the past few days, I've been thinking
about how to workout the details conerning
Rana's request about a 'map'
  
  8987   Thu Aug 8 18:43:12 2013 SujanSummaryPEMOptimally subtracting signals from two seismometers.An exercise of optimally subtracting one
seismometer signal by  another using weiner
filters was done. Results have been summarized
 Results.pdf 
  16965   Thu Jun 30 18:06:22 2022 PacoUpdateALSOptimum ALS recovery - part I[Paco]

In the morning I took some time
to align the AUX beams in the XEND table.
 als_ool_06_2022.png 
  16154   Sun May 23 18:28:54 2021 JonUpdateCDSOpto-isolator for c1auxeyThe new HAM-A coil drivers have a single
DB9 connector for all the binary inputs.
This requires that the dewhitening switching signals
  
  16166   Fri May 28 10:54:59 2021 JonUpdateCDSOpto-isolator for c1auxeyI have received the opto-isolator needed
to complete the new c1auxey system. I
left it sitting on the electronics bench
 optoisolator.jpeg 
  16178   Thu Jun 3 17:15:17 2021 YehonathanUpdateCDSOpto-isolator for c1auxeyAs Jon wrote we need to use the NPN configuration
(see attachments). I tested the isolator
channels in the following way:
 Optical_Isolator_NPN_Input.pngOptical_Isolator_NPN_Output.png 
  16181   Thu Jun 3 22:08:00 2021 KojiUpdateCDSOpto-isolator for c1auxey- Could you explain what is the blue thing
in Attachment 1?

- To check the validity of the
  
  16182   Fri Jun 4 14:49:23 2021 YehonathanUpdateCDSOpto-isolator for c1auxeyI made a diagram (Attached). I think it
explains the blue thing in the previous post.

I don't know what is the grounding
 Optical_isolator_Wiring.pdf 
  16183   Fri Jun 4 17:46:25 2021 unYehonathanUpdateCDSOpto-isolator for c1auxeyI mounted the optoisolator on the DIN rail
and connected the 3 first channels
 20210604_173420.jpg 
  16184   Sun Jun 6 03:02:14 2021 KojiUpdateCDSOpto-isolator for c1auxeyThis RTS also use the BO interface with
an opto isolator. https://dcc.ligo.org/LIGO-D1002593

Could you also include the pull
  
  16186   Sun Jun 6 12:15:16 2021 JonUpdateCDSOpto-isolator for c1auxeySince this Ocean Controls optoisolator
has been shown to be compatible, I've
gone ahead and ordered 10 more:
  
  16187   Sun Jun 6 15:59:51 2021 YehonathanUpdateCDSOpto-isolator for c1auxeyAccording to the BO interface circuit board
https://dcc.ligo.org/D1001266,
PCIN wires are connected to the coil driver
 Optical_isolator_Wiring.pdf 
  16199   Mon Jun 14 15:31:30 2021 YehonathanUpdateCDSOpto-isolator for c1auxeyI checked the BI situation on the HAM-A
coil driver. It seems like these are
sinking BIs and indeed need to be isolated
 Optical_isolator_Wiring.pdf 
  16203   Tue Jun 15 21:48:55 2021 KojiUpdateCDSOpto-isolator for c1auxeyIf my understanding is correct, the (photo
receiving) NPN transistor of the optocoupler
is energized through the acromag. The LED
 Acromag_RTS_BI_config.jpg 
  16205   Wed Jun 16 17:24:29 2021 YehonathanUpdateCDSOpto-isolator for c1auxeyI updated the wiring diagram according
to Koji's suggestion. According to the
 Optical_isolator_Wiring.pdf 
  16207   Wed Jun 16 20:32:39 2021 YehonathanUpdateCDSOpto-isolator for c1auxeyI installed 2 additional isolators in the
Acromag chassis. I set all the input channels
to PNP. I ran the digital inputs (EnableMon
  
  16243   Fri Jul 9 18:35:32 2021 YehonathanUpdateCDSOpto-isolator for c1auxeyFollowing Koji's channel list review,
we made changes to the
wiring spreadsheet.
  
  16244   Mon Jul 12 18:06:25 2021 YehonathanUpdateCDSOpto-isolator for c1auxeyI edited /cvs/cds/caltech/target/c1auxey1/ETMYaux.db
(after creating a backup) and added the spare
coil driver channels.
  
  16263   Wed Jul 28 12:47:52 2021 YehonathanUpdateCDSOpto-isolator for c1auxeyTo simulate a differential output I used
two power supplies connected in series. The
outer connectors were used as the outputs
 SUS-ETMY_SparePDMon0_NoRef.pngSUS-ETMY_SparePDMon0_Ref_WithGND.pngDifferentialOutputTest.png 
  16276   Wed Aug 11 12:06:40 2021 YehonathanUpdateCDSOpto-isolator for c1auxeyI redid the differential input experiment
using the DS360 function generator we recently
got. I generated a low frequency (0.1Hz)
 SUS-ETMY_SparePDMon0_2.png 
  16635   Tue Feb 1 15:33:28 2022 KojiSummaryBHDOptomechanics configuration for the in-vacuum aux small opticsI've summarized the optomechanics configuration
for the in-vacuum aux small optics

It's not obvious here but the
 Invac_opto_mechanics_v2.pdf 
  16640   Wed Feb 2 18:55:58 2022 KojiSummaryBHDOptomechanics configuration for the in-vacuum aux small opticsHere is more detail of the POP_SM4
mount assembly.

It's a combination of BA2V
 Screen_Shot_2022-02-02_at_6.46.46_PM.png 
  16641   Wed Feb 2 21:16:23 2022 KojiSummaryBHDOptomechanics configuration for the in-vacuum aux small opticsAsked Jordan to clean 2x 1.5" posts
(0.5 dia) and a washer with 1" dia.

 
 PXL_20220203_050156031.jpg 
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