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  40m Log, Page 326 of 330  Not logged in ELOG logo
ID Date Author Typedown Category Subject Text Attachments
  13824   Tue May 8 00:40:51 2018 gautamConfigurationALSBeathMouth pulled out of PSL tableSummary:

I did some more BeatMouth characterization.
My primary objective was to do a power budget.
 IMG_6986.JPGIMG_6987.JPG 
  13845   Tue May 15 20:51:27 2018 gautamConfigurationElectronicsMaking PLL setup more permanent[jon, steve, gautam]

Some points which Jon will elaborate
  
  13848   Wed May 16 18:52:50 2018 gautamConfigurationElectronicsPLL mysteries solved[Koji,
Gautam]

Summary:
 PLLanalysis.pdfPZTcal.pdfSR560_funkiness.pdf 
  13858   Thu May 17 13:51:35 2018 Jon RichardsonConfigurationElectronicsDocumentation & Schematics for AUX-PSL PLL[Jon, Gautam]

Attached is supporting documentation
for the AUX-PSL PLL electronics installed
  
  13863   Fri May 18 14:18:03 2018 gautamConfigurationElectronicsBasic MEDM Control Screen setupI setup a basic MEDM screen for remote
control of the PLL.

The Slow control voltage slider
 AUX_PLL_CTRL.png 
  13867   Fri May 18 19:59:55 2018 Jon RichardsonConfigurationElectronicsAUX-PSL PLL Characterization MeasurementsBelow is analysis of measurements
I had taken of the AUX-PSL PLL using an SR560
as the servo controller (1 Hz single-pole
 SR560_OL.pdfSR560_CL.pdf 
  13873   Mon May 21 15:34:19 2018 gautamConfigurationElectronicsChannel hijacking historySince we've been hijacking channels
like there is no tomorrow for the AUX-PLL
setup, I'm documenting the channel names
  
  13876   Tue May 22 10:14:39 2018 Jon RichardsonConfigurationElectronicsDocumentation & Schematics for AUX-PSL PLL 




 Schematic_PLL.pdf 
  13881   Wed May 23 00:45:18 2018 johannesConfigurationGeneralAS port laser injectionI was planning to set up the additions
to the AS table that are outlined in Attachment
#1. Unfortunately the beam is too large for
 faraday_location.pdf 
  13886   Thu May 24 13:06:17 2018 gautamConfigurationALSDFD noisesSummary:


The DFD noise floor is
~0.5Hz/rtHz
 DFDcalib.pdfDFD_NB.pdf 
  13889   Thu May 24 19:41:28 2018 gautamConfigurationALSBeathMouth reinstalled on PSL tableSummary:


DC light power incident
on beat PD is 
  
  13890   Thu May 24 20:31:03 2018 gautamConfigurationALSDFD noisesA
couple of months ago, I took 21 measurements
of the delay line transfer function. As shown
 TF_X_mag.pdfTF_X_phase.pdf 
  13891   Fri May 25 13:06:33 2018 Jon RichardsonConfigurationElectronicsImproved Measurements of AUX-PSL PLLAttached are gain-variation measurements
of the final, in situ AUX-to-PSL phase-locked
loop (PLL).
 LB1005_OL_transfer.pdfdata.tar.gz 
  13906   Thu May 31 22:59:27 2018 KojiConfigurationComputersShorewall on nodus[Jonathan Koji]

Shorewall (http://shorewall.net/),
a tool to configure iptables, was installed
  
  14020   Tue Jun 26 17:20:33 2018 JonConfigurationCamerasLLO Python Camera Software is WorkingThanks to a discussion yesterday with Joe
Betzweiser, I was able to identify and fix
the remaining problem with the LLO GigE camera
  
  14026   Wed Jun 27 19:37:16 2018 KojiConfigurationComputersNew NAT router installed[Larry, Koji]

We replaced the NAT router between
martian and the campus net. We have the administrative
 P_20180627_193357.jpg 
  14033   Fri Jun 29 18:16:32 2018 JonConfigurationPSLChanges to AUX Optical Layout on PSL TableIn order to use the 0th-order deflection
beam from the AOM for cavity mode scans,
I've coaligned this beam to the
 PSL_AUX_SETUP_CHANGE.pdf 
  14041   Fri Jul 6 12:12:09 2018 AnnalisaConfigurationThermal CompensationThermal compensation setupI tried to put together a rudimentary heater
setup. 

As a heating element, I used the
 IMG_1887.jpgIMG_1884.jpgIMG_1883.jpgIR20180706_0358_labels.png 
  14043   Sat Jul 7 19:50:38 2018 AnnalisaConfigurationThermal CompensationStudy about the Thermal projection setup and its effect on the cavityI made some simulation to study the change
that the heater setup can induce on the Radius
of Curvature of the ETM.
 6x 
  14050   Tue Jul 10 23:44:23 2018 AnnalisaConfigurationThermal CompensationHeater setup assembly[Annalisa, Koji]

Today both the heater and the reflector
were delivered, and we set down the setup
 8x 
  14062   Fri Jul 13 00:15:13 2018 Annalisa, TerraConfigurationAUXY arm cavity scan [Annalisa, Terra, Koji, Gautam]

Summary: We
find a configuration for arm scans which
 IMG_6492.JPGIMG_6494.JPG 
  14071   Fri Jul 13 23:39:46 2018 AnnalisaConfigurationThermal CompensationThermal compensation setup - power supply[Annalisa, Rana]

In order to power the heater setup
to be installed in the ETMY chamber,
 IMG_2012.jpgIMG_2013.jpg20180713_213818.jpg 
  14078   Tue Jul 17 17:37:46 2018 Annalisa, TerraConfigurationThermal CompensationHeaters installationSummary

We
installed two heaters setup on the ETMY bench
in order to try inducing some radius of curvature
 6x 
  14091   Fri Jul 20 18:30:47 2018 JonConfigurationAUXRecommend to install AUX PZT driverI recently realized that the PLL is only
using about 20% of the available actuation
range of the AUX PZT. The +/-10 V control
  
  14104   Wed Jul 25 22:46:15 2018 gautamConfigurationComputersNDS access from outsideAfter this work, I've been having some
trouble getting data with Python NDS. Eventually,
I figured out that the nds connection request
  
  14153   Fri Aug 10 11:29:39 2018 aaronConfigurationUpgradeParts list for BHDI've started putting together a list
of things we'll need to buy to do BHD
readout. I'm still messing around with
  
  14154   Fri Aug 10 16:43:50 2018 gautamConfigurationUpgradeParts list for BHDCan we use the leakage
beam from MMT2 on the OMC table as the
LO beam? I can't find the spec for this
  
  14155   Sun Aug 12 10:59:34 2018 aaronConfigurationUpgradeParts list for BHDThat seems fine, I wasn't thinking
of that beam. in that case could we just
have a PBS directly behind MMT2 and send
  
  14158   Mon Aug 13 17:20:07 2018 aaronConfigurationUpgradeParts list for BHDI've attached the diagram of what I
mean.

There are a couple caveats and
 BHD_layout.pdf 
  14205   Fri Sep 21 09:59:09 2018 yukiConfigurationASCY end table upgrade plan[Yuki, Gautam]

Attachments #1 is the current setup
of AUX Y Green locking and it has
 Pic_CurrentSetup_AUXYgreen.jpegModeMatchingSolution_Current.pdfModeMatchingSolution_Current_Magnified.pdfModeMatchingSolution_Optimized.pdfModeMatchingSolution_Optimized_Magnified.pdf 
  14212   Sun Sep 23 19:32:23 2018 yukiConfigurationASCY end table upgrade plan[ Yuki, Gautam ]

The setup I designed before has
abrupt gouy phase shift between two steering
 Pic_NewSetup0923_AUXYgreen.jpegModeMatchingSolution_Result.pdfModeMatchingSolution_Magnified_0923.jpgpic0923_1.jpgpic0923_2.jpg 
  14214   Mon Sep 24 11:09:05 2018 yukiConfigurationASCY end table upgrade plan[ Yuki, Steve ]

With Steve's help, we checked
a new lens can be set soon after dichroic
 pic0924_1.jpg 
  14216   Tue Sep 25 18:08:50 2018 yukiConfigurationASCY end table upgrade plan[ Yuki, Gautam ]

We want to remotely control steeing
PZT mirrors so its driver is needed.
  
  14218   Thu Sep 27 14:02:55 2018 yukiConfigurationASCPZT driver board verification[ Yuki, Gautam ]

I fixed the input terminal that
had been off, and made sure PZT driver
 PZTdriverSimulationDiagram.pdfPZTdriverSimulationResult.pdfPZTdriverPerformanceCheck_ResultOUT.pdfPZTdriverPerformanceCheck_ResultMON.pdfPZTdriver.asc 
  14219   Sun Sep 30 20:14:51 2018 yukiConfigurationASCQPD calibration[ Yuki, Gautam, Steve ]

Results:
I calibrated a QPD (D1600079, V1009)
 QPDcalibrationXaxis.pdfQPDcalibrationYaxis.pdf 
  14220   Mon Oct 1 12:03:41 2018 not yukiConfigurationASCPZT driver board verificationI assume this QPD set is a D1600079/D1600273
combo.

How much was the SUM output during
  
  14221   Mon Oct 1 13:33:55 2018 yukiConfigurationASCQPD calibration


Quote:


 Pic_QPDcalibration.jpg 
  14222   Mon Oct 1 20:39:09 2018 gautamConfigurationASCc1asyWe need to set up a copy of the c1asx   
  14224   Tue Oct 2 18:50:53 2018 yukiConfigurationASCPZT mirror calibration[ Yuki, Gautam ]

I calibrated PZT mirrors. The ROUGH
result was attached. (Note that some errors and
 PZTM1calibrationCH2.pdfPZTM1calibrationCH1.pdfPZTM2calibrationCH2.pdfPZTM2calibrationCH1.pdf 
  14226   Wed Oct 3 14:24:40 2018 yukiConfigurationASCY end table upgrade planInterim Procedure Report:

Purpose

The current setup of AUX Y-arm
  
  14227   Wed Oct 3 18:15:34 2018 yukiConfigurationASCAI board improvement[ Yuki, Gautam ]

I improved Anti-Imaging board (D000186-Rev.D),
which will be put between DAC port and
 TF_AIboard.pdf 
  14228   Thu Oct 4 00:44:50 2018 yukiConfigurationASCAI board improvement[ Yuki, Gautam ]

I made a cable which connects DAC
port (40 pins) and AI board (25 pins). I
  
  14230   Thu Oct 4 22:15:30 2018 yukiConfigurationASCY-end table upgradeBefore changing setup at Y-end table, I
measured the status value of the former setup
as follows. These values will be compared
 AUXYGreenLock20180921.jpgPic_FormerSetup.jpegPic_CurrentSetup1004.jpg 
  14231   Fri Oct 5 00:46:17 2018 KojiConfigurationASCY-end table upgrade???

The SHG crystal has the conversion
efficiency of ~2%W (i.e. if you have 1W input
  
  14232   Fri Oct 5 17:32:38 2018 yukiConfigurationASCY-end table upgradeI measured it with the wrong setting of
a powermeter. The correct ones are here:


beam power going into doubling
  
  14233   Fri Oct 5 17:47:55 2018 gautamConfigurationASCY-end table upgradeWhat
about just copying the Xend
  
  14234   Fri Oct 5 22:49:22 2018 yukiConfigurationASCY-end table upgradeI designed a new layout. It has good mode-matching
efficiency, reasonable sensitivity to component
positions, good Gouy phase separation. I'm
  
  14235   Sun Oct 7 16:51:03 2018 gautamConfigurationLSCYarm triggering changedTo facilitate Yuki's alignment of the
EY green beam into the Yarm cavity, I have changed
  
  14236   Sun Oct 7 22:30:42 2018 yukiConfigurationLSCYarm Green locking was recoveredI finished installation of optics in the
Y-end and recovered green locking. Current
ALS-TRY_OUTPUT is about 0.25, which is lower
 Pic_NewLayout1007.jpgYendGreenModeMatching.zip 
  14237   Mon Oct 8 00:46:35 2018 yukiConfigurationASCY-end table upgrade


Quote:


  
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