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ID Date Author Type Category Subjectup Text Attachments
  17206   Mon Oct 24 18:01:00 2022 PacoSummaryBHDBHD actuation measurements[Yuta, Paco]

Today
we calibrated the actuation on BHD suspended
 OLTF_LOPhaseLocking_ITMYSingleBounce.pngActuationRatio_ITMY_AS1_AS4_LO1_LO2.png 
  16880   Fri May 27 17:45:53 2022 yutaConfigurationBHDBHD camera installed, GRY aligned[JC, Paco, Yuta]

After the IFO recovery (elog 40m/16881),
  
  15284   Thu Mar 26 17:41:18 2020 JonOmnistructureBHDBHD docs compilationSince there has been a proliferation of
BHD Google docs recently, I've linked
them all from the BHD
  
  17056   Wed Aug 3 16:00:51 2022 yutaUpdateBHDBHD fringe aligned with reduced LO and AS beam clippingLast week, we could find an alignment which
realizes LO beam and AS beam both unclipped,
but it was not consistent with an alignment
 Screenshot_2022-08-03_15-46-36_BHDfringeAlmostUnclipped.png 
  17208   Tue Oct 25 08:25:00 2022 JCUpdateBHDBHD fringe aligned with reduced LO and AS beam clippingI aligned today using this scheme. I couldn't
seem to get C1:IOO-MC_TRANS_SUM above
13400 by using WFS or manually aligning.
  
  17067   Tue Aug 9 15:33:12 2022 yutaUpdateBHDBHD fringe contrast improved from 43% to 74%[Anchal, Yehonathan, Yuta]

We did the constrast measurement with
 HPC-DCPD_B_OUT_1344118517_ITMY-LO.pngHPC-DCPD_A_OUT_1344118517_ITMY-LO.pngHPC-DCPD_B_OUT_1344118318_ITMX-LO.pngHPC-DCPD_A_OUT_1344118318_ITMX-LO.png 
  17068   Tue Aug 9 15:50:22 2022 KojiUpdateBHDBHD fringe contrast improved from 43% to 74%For both 40m/17020
and 40m/17024,
what does the contrast mean if the numbers
  
  17273   Wed Nov 16 15:09:08 2022 yutaUpdateBHDBHD fringe contrast measured with unwhitening filtersBHD fringe visibility was measured again
with unwhitening filters on on BHDC_A and
B, which removed signal leakage to zero (
 ContrastMeasurements20221116_edited.pdf 
  15295   Fri Apr 3 13:40:07 2020 JonUpdateBHDBHD front-end complicationI wanted to pass along a complication pointed
out by K. Thorne re: our plan to use Gen1
(old) Dolphin IPC cards in the new real-time
  
  15299   Tue Apr 7 10:56:39 2020 JonUpdateBHDBHD front-end complication


Quote:


  
  16475   Thu Nov 18 14:29:01 2021 KojiSummaryBHDBHD invac optics / opto-mechanicsI   
  15336   Mon May 18 18:00:16 2020 HangUpdateBHDBHD mode-matching study[Jon, Tega, Hang]

We proposed a few BHD mode-matching telescope
designs and then preformed a few monte-carlo
 MM.pdf 
  15337   Tue May 19 15:24:06 2020 ranaUpdateBHDBHD mode-matching studyIt would be good to have a corner
plot with all the distances/ RoCs. Also
perhaps a Jacobian
  
  15339   Wed May 20 18:45:22 2020 HangUpdateBHDBHD mode-matching study--corner plot & adjustment requirementAs Rana suggested, we present the
scattering plot of the AS path
mode matching for various variables.
 AS_MM_scat2.pdfAS_MM_adj2.pdf 
  15151   Fri Jan 24 13:56:21 2020 JonUpdateBHDBHD optics specificationsI've started a spreadsheet for the
BHD optics specifications and populated it
with my best initial guesses. There are a
  
  15305   Thu Apr 16 21:13:20 2020 JonUpdateBHDBHD optics specificationsSummary

I've generated
specifications for the new BHD optics. This
includes the suspended relay mirrors as
 LO_Beam_Calc-v1.pdfAS_Beam_Calc-v1.pdf 
  15334   Fri May 15 09:18:04 2020 JonUpdateBHDBHD telescope designs accounting for ASCHang and I have reanalyzed the BHD telescope
designs, with the goal of identifying
sufficiently non-degenerate locations for
 LOpath.pdfASpath.pdf 
  16849   Thu May 12 20:11:18 2022 AnchalUpdateBHDBHDBS Output beams steered out to ITMY tableI successfully steered out the two output
beams from BHD BS to ITMY table today. This
required significant changes on the table,
 signal-2022-05-12-201844.jpeg 
  17303   Wed Nov 23 14:59:11 2022 PacoSummaryBHDBHD_DIFF sensitivity to BS dither with MICH Offset[Yuta, Paco, Anchal]

We measured

(a)
 BHDIFF_rand_SensvsMICHOffset.pdf 
  17309   Wed Nov 23 20:58:23 2022 yutaSummaryBHDBHD_DIFF sensitivity to BS dither with MICH Offset with different BH55 demodulation phases[Anchal, Paco, Yuta]

Attachment #1 is the same plot as 
 BHDIFF_rand_SensvsMICHOffset_pydemod.pdfBHDIFF_rand_SensvsMICHOffset_pydemod_NoMICHinBH55Q.pdfBHDIFF_rand_SensvsMICHOffset_pydemod_BH55at70deg.pdfMICHBHD_BH55.pdf 
  16188   Sun Jun 6 16:33:47 2021 JonUpdateCDSBI channels on c1auxey



There
  
  16189   Mon Jun 7 13:14:20 2021 YehonathanUpdateCDSBI channels on c1auxeyI added a new XT1111 Acromag module to
the c1auxey chassis. I sanitized and configured
it according to the slow
  
  16193   Tue Jun 8 11:54:39 2021 YehonathanUpdateCDSBI channels on c1auxeyI tested the digital inputs the following
way: I connected a DB9 breakout to DB9M-5
and DB9M-6 where digital inputs are hosted.
  
  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
  
  5567   Wed Sep 28 18:39:50 2011 MirkoUpdatePEMBLRM seismic channels in c1pem[Mirko,Jenne]
Created 5-band BLRMS for seismometer
data (Gur1, Gur2 and STS1 each in x,y,z respectively)
  
  6523   Wed Apr 11 22:48:39 2012 ranaUpdateEnvironmentBLRMS   seis_blrms.png 
  7183   Tue Aug 14 21:01:51 2012 ranaUpdatePEMBLRMS   Screenshot-Untitled_Window.png 
  8764   Thu Jun 27 15:50:03 2013 JenneUpdatePEMBLRMS are going crazyThe BLRMS are totally crazy today! 
I'm not sure what the story is, since it's
been this way all day (so it's not an earthquake,
 WeirdBLRMSincrease_27June2013_rawSeis.pngWeirdBLRMSincrease_27June2013_lowFreqBLRMS.pngWeirdBLRMSincrease_27June2013_Gur1xBLRMS.png 
  8773   Thu Jun 27 21:45:48 2013 ranaUpdatePEMBLRMS are going crazyIts an increase in the microseismic peak.
Don't know what its due to though.
 useism.pdf 
  7745   Mon Nov 26 18:36:17 2012 JenneUpdatePEMBLRMS back

    

       
            
  
  11849   Fri Dec 4 18:20:36 2015 gautamUpdateCDSBLRMS for IMC setup[ericq, gautam]

BLRMS filters
have been set up for the coil outputs and
 c1pem_timing.pngC1SUS_overclocked.png 
  11844   Thu Dec 3 18:18:48 2015 gautamUpdateCDSBLRMS for optics suspensions - library blockIn order to be consistent with the naming
conventions for the new BLRMS filters, I
made a library block that takes all the input
  
  12064   Tue Apr 5 14:16:34 2016 gautamUpdateCDSBLRMS for optics suspensions - library block UPDATEDAs discussed in a Wednesday meeting some
time ago, we don't need to be writing
channels from BLRMS filter modules to frames
  
  9744   Sun Mar 23 14:20:07 2014 ranaHowToLSCBLRMS screens We should make screens like this
for the LSC signals, errors, ALS, etc.
 blrms.png 
  5835   Mon Nov 7 16:42:56 2011 JenneUpdateAdaptive FilteringBLRMS's to monitor OAF channelsI copied Mirko's PEM BLRMS block, and made
it a library part.  I don't know where
such things should live, so I just left it
  
  7016   Tue Jul 24 02:12:14 2012 MashaUpdatePEMBLRMS, MEDM, TriangulationToday I worked with the BLRMS channels,
re-triangulated the seismometers (the STS
is now on the very end of the Y-arm, while
  
  2210   Mon Nov 9 12:09:10 2009 AlbertoOmnistructureEnvironmentBNC Cable Laid Down from South End to East VErtexI laid down the floor a BNC cable from
the Y End table to the BNC Chamber. The cable
runs next to the east wall.
 DSC_0986.JPG 
  8016   Wed Feb 6 20:00:06 2013 ManasaUpdateElectronicsBNC cables piled up at every corner [Yuta, Steve, Manasa]
There are cables piled up around
the access connector area which have been
 109393779.png 
  9927   Thu May 8 00:40:39 2014 ericqUpdateLSCBNC vs. 2pin LEMO for AO I've checked that the 2pin lemo connector
that was run some time ago from the LSC rack
to the MC board does indeed transmit signals.
 AOcablesWide.pdf 
  13118   Sat Jul 15 01:28:53 2017 jigyasaUpdateCamerasBRDF CalibrationsThis evening,
Gautam helped me with setting up the apparatus
for calibrating the GigE for BRDF measurements.
  
  13119   Sat Jul 15 13:40:59 2017 ranaUpdateCamerasBRDF CalibrationsPower meter only needed to measure power
going into the paper not out. We use the
BRDF of paper to estimate the power going
  
  13121   Sun Jul 16 11:58:36 2017 jigyasaUpdateCamerasBRDF Calibrations 

From
what I understood froom my reading, [Large-angle
  
  13122   Sun Jul 16 12:09:47 2017 jigyasaUpdateCamerasBRDF CalibrationsWith this idea in mind, we can now actually
take images of the illuminated paper at
different scattering angles, assume BRDF
  
  4858   Wed Jun 22 18:41:23 2011 NicoleSummarySUSBROKEN bread board circuit box and L9337 LED Current Versus Voltage CurveNOTE: The potentiometers on the  LED_I_vs_V_exp_plot.png 
  12054   Wed Mar 30 11:35:24 2016 steveUpdatesafetyBS visitor's viewport is protected with lexan[quote]The four horizontal viewports of arms
are protected 
by 3/8" thick, 8.5" OD Lexan disk of MR10
  
  16586   Fri Jan 14 12:01:21 2022 AnchalUpdateElectronicsBS & ITMY feedthroughs labeled and connected to Sat AmpsI labeled all the newly installed flanges
and connected the in-air cables (40m/16530)
to appropriate ports. These cables are connected
  
  10802   Tue Dec 16 00:20:06 2014 diegoUpdateOptical LeversBS & PRM OL realignment[Rana, Diego]
We manually realigned the BS and
PRM optical levers on the optical table.
  
  5322   Tue Aug 30 10:49:29 2011 steveUpdateSUSBS & PRM damping restoredI have restored the damping of BS and PRM.
Today is janitor day. He is shaking things
around the lab.
  
  11233   Wed Apr 22 11:21:51 2015 SteveUpdateOptical LeversBS & PRM oplevs are back to normalBS & PRM oplev is restored. Note: the
F -150 lens was removed right after the first
turning mirror from the laser. This helped
  
  11087   Mon Mar 2 17:02:01 2015 ericqUpdateLSCBS - PRM decouplingUsing PRX, I remeasured the relative actuation
strengths of the BS and PRM to see if the
PRM correction coefficient we're using
  
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