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  40m Log, Page 324 of 327  Not logged in ELOG logo
ID Date Author Type Categoryup Subject Text Attachments
  8845   Mon Jul 15 11:51:18 2013 gautamConfigurationendtable upgradeDAC at 1Y4-Max Output and Power Spectrum Summary:
I measured the maximum output of
the DAC at 1Y4 as well as its power spectrum.
 max_amp.JPGmax_amp_all_channels.JPGDACOffPowerSpec.pdfDACOnPowerSpec.pdfDAC2kPowerSpectrum.pdf 
  8846   Mon Jul 15 13:51:17 2013 KojiConfigurationendtable upgradeDAC at 1Y4-Max Output and Power SpectrumWe need the unit of the voltage power spectrum
density to be V/sqrt(Hz).
  
  8848   Mon Jul 15 15:54:20 2013 gautamConfigurationendtable upgradeDAC at 1Y4- Power Spectrum -with the right units

    

       
            
 DACOffPSD.pdfDAC500PSD.pdfDAC2000PSD.pdf 
  8852   Mon Jul 15 17:20:43 2013 JenneConfigurationendtable upgradeDAC at 1Y4- Power Spectrum -with the right unitsThose 'peaks' for the oscillations seem
ridiculously broad.  I think you should
look again, really quickly, with smaller
  
  8853   Mon Jul 15 17:59:31 2013 gautamConfigurationendtable upgradeDAC at 1Y4- Power Spectrum -6.4kHz bandwidth

    

       
            
 DAC-6.4_kHz_BW_PSD.pdf 
  8857   Tue Jul 16 14:51:09 2013 gautamConfigurationendtable upgradeAI Board-D000186-Modified notches I tried shifting the notch frequencies
on the D000186-revision D board given to
me by Koji. The existing notches were at
 D000186_Frequency_Response.pdf 
  8873   Thu Jul 18 19:09:08 2013 gautamConfigurationendtable upgradeQPD Calibration for PZT CalibrationSummary 
I have been working on setting up
a QPD which can eventually be used to calibrate
 QPD-XCalib.pdfQPD-YCalib.pdfError_Function_Fitting.zip 
  8874   Thu Jul 18 20:20:52 2013 gautamConfigurationendtable upgradeFirst mirror glued to PZT and mounted in modified mounts 
 Yesterday,
I mounted the first PZT in one of the modified
 Piezo-mirror.jpg 
  8875   Thu Jul 18 21:12:58 2013 gautamConfigurationendtable upgradeAI Board-D000186-All channels modified 
 I carried some further modifications
and tests to the AI Board. Details and observations
 AI_Board_Output.jpg 
  8877   Thu Jul 18 23:34:40 2013 gautamConfigurationendtable upgradeCoarse adjustment of PZT axes orientation in mount I have
managed to orient the PZT in the mount such
that its axes are approximately aligned with
 PZT_out_waveform.jpg 
  8883   Fri Jul 19 22:51:40 2013 gautamConfigurationendtable upgradeSecond mirror glued to PZT and mounted  
I
 Piezo-mirror_2.JPG 
  8884   Fri Jul 19 23:35:31 2013 gautamConfigurationendtable upgradePreliminary Calibration of PZT I recalibrated
the QPD today as I had shifted its position
a little. I then identified the linear range
 QPD-XCalib.pdfQPD-YCalib.pdfPiezo_Yaw_Calib-in_QPD_linear_range-Pitch_tilt.pdfPiezo_Yaw_Calib-in_QPD_linear_range-Yaw_tilt.pdf 
  8892   Mon Jul 22 17:17:30 2013 annalisaUpdateendtable upgradeEnd table picture   YendTable.jpg 
  8896   Tue Jul 23 00:51:46 2013 KojiUpdateendtable upgradeEnd table pictureThe spot on the IPANG QPD was checked.
The spot is higher than the center and South
side of the lens.
 P7224222.JPGP7224223.JPGP7224224.JPGP7224238.JPG 
  8910   Tue Jul 23 19:37:08 2013 AnnalisaUpdateendtable upgradeEnd table picture

    

       
            
 IMG950073.jpgIMG950072.jpg 
  8912   Tue Jul 23 20:41:40 2013 gautamConfigurationendtable upgradeFull range calibration and installation of PZT-mounted mirrors Given
that the green beam is to be used as the
 M1_Pitch_calib.pdfM1_Yaw_calib.pdfM2_Pitch_calib.pdfM2_Yaw_calib.pdfPI_S330.20L.pdf 
  8930   Sun Jul 28 19:39:04 2013 AnnalisaUpdateendtable upgradePicture Yend table picture updated on the wiki
page
  
  8932   Mon Jul 29 13:39:25 2013 gautamConfigurationendtable upgradePZT Driver Board-further changes 
 
I have
 D980323-C-modified.pdfD980323-C-modified-pg2.pdf 
  8935   Mon Jul 29 21:57:45 2013 gautamConfigurationendtable upgradeHardware installed at 1X9 The following hardware   
  8942   Tue Jul 30 19:40:47 2013 gautamConfigurationendtable upgradeDAC-PZT Driver Board Output Signal Chain Tested 
 [Alex, Gautam]
  
  8943   Tue Jul 30 19:44:05 2013 gautamConfigurationendtable upgradeSecond mirror glued to PZT and mounted  
 I have
  
  8967   Mon Aug 5 18:48:44 2013 gautamConfigurationendtable upgradeFull range calibration of PZT mounted mirrors for Y-endtable I
had prepared two more PZT mounted mirrors
for the Y-end some time back. These are:
 2-inch-CVI-Yawcalib.pdf2-inch-CVI-Pitchcalib.pdf1-inch-Laseroptik-Yawcalib.pdf1-inch-Laseroptik-Pitchcalib.pdf 
  9451   Mon Dec 9 11:44:08 2013 SteveUpdateendtable upgradeETMY optable got new beam dumpAluminum shield replaced by razor beam
dump.
 ETMYoptBefore.jpgETMYoptAfter.jpg 
  9941   Mon May 12 14:42:25 2014 steveUpdateendtable upgradeoptical table enclosure wall proposal and table at ETMY

    

       
            
 Hilite70.jpgETMY-ISCT.jpgRoscoThermashield.pdf 
  11591   Fri Sep 11 10:56:47 2015 SteveUpdateendtable upgradeETMY optical table feedthroughThe ETMY enclosure feedthrough - north
is installed. The sealing material is hard
to work with.
 ETMY-Nfeedt.jpg 
  11600   Tue Sep 15 16:49:08 2015 SteveUpdateendtable upgradeETMY optical table feedthroughETMY optical table enclosure feedthrough-
south is in. Now it is time to see how air
tightness increases performance.
 ETMYsFeedt.jpg 
  11608   Thu Sep 17 02:22:53 2015 SteveUpdateendtable upgradeETMY optical table feedthroughI doubt we'll see any effect until
we carefully seal the holes. If there's
1 hole in your boat it still sinks.
  
  11897   Tue Dec 22 16:39:42 2015 SteveUpdateendtable upgradeETMY optical table enclosureI think there should be a scientifically
based aveluation of the ETMY enclosure so
we can make the ETMX better.
 IMG_0028.JPGIMG_0027.JPGETMY-ISCT_EISOL.jpg 
  12029   Thu Mar 10 16:29:32 2016 gautamUpdateendtable upgradeInventory checkI did a quick sweep of the lab to find
out what hardware has already been acquired
for the X-end table upgrade. The attached
 Inventory_check.pdfDoubler_comparison.pdf 
  12030   Thu Mar 10 16:32:45 2016 ranaUpdateendtable upgradeInventory checkIts not a good idea to use green mounts
with green lasers. Steve should be able to
get another copy of the EY doubler mount
  
  12033   Mon Mar 14 22:42:23 2016 gautamUpdateendtable upgradeInventory check


  
  12051   Mon Mar 28 10:43:18 2016 SteveUpdateendtable upgradeETMX 4'x2' optical table pictures 

 
 ETMX4x2Layout.jpgETMX_4x2.JPGETMXopt_4x2.JPG 
  12056   Wed Mar 30 17:38:52 2016 gautamUpdateendtable upgradeX end table proposed layout Attachment 1: This
is a photo of the current X end table optical
layout with the beampaths of the various
 ETMX_3x2.JPGlayout_details_20160328.pdfETMX_proposed_layout.pdf 
  12057   Thu Mar 31 09:38:41 2016 SteveUpdateendtable upgradeY end 4x3 existing layoutBeam colors: 1064 nm red, 514 nm green
and 633 nm yellow.

There should be room for lens in
 ETMY4x3layout.jpg 
  12058   Thu Mar 31 19:49:31 2016 gautamUpdateendtable upgradeproposed layout v2The major changes from the previous layout:


I've depicted the Green
reflected beam path more accurately - I approximately measured
 ETMX_proposed_layout_v2.pdf 
  12060   Mon Apr 4 10:59:12 2016 gautamUpdateendtable upgradeproposed layout v3I realized I had overlooked an important
constraint in the layout, which is that the
enclosure will have two supports that occupy
 ETMX_proposed_layout_v3.pdfIR_modematch.pdfGreen_modematch.pdfXendALaMode.zipETMX_proposed_layout_dimensions.dwg 
  12061   Mon Apr 4 15:04:14 2016 gautamUpdateendtable upgradeCOMPONENT REMOVAL
I'm
planning to start removing components from
  
  12063   Tue Apr 5 11:42:17 2016 gaericqutamUpdateendtable upgradeTABLE REMOVALThere is currently no table at
the X end! 

We have moved the vast majority
  
  12065   Wed Apr 6 17:52:21 2016 gautamUpdateendtable upgradeFirst contact cleaning commencedI've begun cleaning the optics that
will eventually go back onto the newly installed
X-endtable. We decided that First Contact
  
  12066   Thu Apr 7 12:51:24 2016 gautamUpdateendtable upgradeBeam height differencesSteve has finished installing the enclosure
on the new endtable. So Eric and I decided
to try and lock the X arm and measure the
  
  12067   Thu Apr 7 14:30:58 2016 SteveUpdateendtable upgradeETMX table height 




 ETMXbrs.pngETMX.jpgIMG_0618.JPGETMX.jpgETMXwc.jpg 
  12068   Fri Apr 8 09:13:20 2016 SteveUpdateendtable upgradeETMX-T beam heightX arm resonating after alignment, beam
height on ETMX optical table ~4.75"

 
 ETMXalignedT.pngETMXF.jpg 
  12073   Wed Apr 13 00:56:07 2016 gautamUpdateendtable upgradeX endtable repopulationOver the last couple of days, I've
been working on restoring the optical layout
on the X-endtable. Some notes about the status
  
  12074   Wed Apr 13 11:00:28 2016 SteveUpdateendtable upgradeX endtable repopulationETMX optical table is grounded to ETMX
chamber through 1 Mohms

The doubling oven temp controller
  
  12075   Wed Apr 13 18:25:07 2016 gautamUpdateendtable upgradeLightwave health check[Koji,gautam]

Lightwave NPRO information:

Model: 126-1064-700
  
  12079   Fri Apr 15 18:38:12 2016 gautamUpdateendtable upgradeLightwave health check - NO IMPROVEMENTI re-measured the power levels today.

We have ~205mW out of the NPRO,
and ~190mW after the Faraday. It doesn't
  
  12083   Tue Apr 19 18:37:29 2016 gautamUpdateendtable upgradeLaser swap + optical layoutSummary of work done over the last
two days


Lightwave NPRO
 IR_modematch_19April2016_2.pdf 
  12085   Thu Apr 21 14:25:52 2016 gautamUpdateendtable upgradeGreen light recoveredI've made progress on the new layout
up to the doubling oven. After doing the
coarse alignment with the diode current to
 IMG_6567.JPGIMG_6568.JPGCVI_reflectivity.jpeg 
  12089   Tue Apr 26 15:22:35 2016 SteveUpdateendtable upgradeCleaning ETMX vacuum dirty windowGautom is progressing with the layout nicely.
The X-arm transmission window have not seen
cleaning for decades. This should be the
 ETMX-Tvp.jpgETMX-TvpDetail.jpg 
  12090   Tue Apr 26 23:19:42 2016 gautamUpdateendtable upgradeGreen aligned to arm - high order mode flashes seenAttachment #1

Layout as of today. Most of the
green path is done. The Green REFL PD + PZT
 IMG_2219.JPGIMG_2220.JPG 
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