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ID Date Authordown Type Category Subject Text Attachments
  8804   Mon Jul 8 13:45:19 2013 gautamConfigurationendtable upgradeDriver board verificationWith the help of an expansion card,  I
verified that the + 15V and + 24V
from the eurocrate in the slot I've identified
  
  8809   Tue Jul 9 11:37:37 2013 gautamUpdateCDSset up for testing DAC Interface-board pin outsThe bank marked channel 9-16 is free, but
the connector is a 40 pin IDC and I need
to know the exact pin-out configuration before
  
  8811   Tue Jul 9 12:01:20 2013 gautamUpdateCDSset up for testing DAC Interface-board pin outs 
 Jenne just rebooted c1scy and
daqd on the framebuilder. We will do the
  
  8814   Tue Jul 9 18:44:37 2013 gautamUpdateCDSDAC Interface Board-Pin Outs  Summary:
The pin-outs for the DAC interface
board have been determined.
 DAC_Interface_Board_Pin-out.pdfbreak-out_ribbon.JPG 
  8817   Wed Jul 10 01:27:44 2013 gautamUpdateGreen LockingY-end Green PDH open-loop transfer function [Annalisa, gautam]
Summary:
We have measured the open-loop transfer
 Green_PDH_measurement.pdfY-end_Green_PDH.pdf 
  8823   Wed Jul 10 22:41:06 2013 gautamConfigurationendtable upgradePZT Driver Board I
did the following with the 
 HV_Amplifier.pdf 
  8832   Thu Jul 11 23:50:57 2013 gautamConfiguration PZT Driver Board-changes made Summary:

 ASC_schematic.pdfDAC_Max_output.JPG 
  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 
  8848   Mon Jul 15 15:54:20 2013 gautamConfigurationendtable upgradeDAC at 1Y4- Power Spectrum -with the right units

    

       
            
 DACOffPSD.pdfDAC500PSD.pdfDAC2000PSD.pdf 
  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 
  8900   Tue Jul 23 04:07:48 2013 gautamUpdateCDSExcitation points set up on c1scx 
 In
light of recent events and the decision to
  
  8909   Tue Jul 23 16:47:01 2013 gautamUpdateCDSExcitation points set up on c1scx I just compiled and installed the
model with the excitation points on c1scx
and then restarted framebuilder. The channels
  
  8911   Tue Jul 23 19:38:58 2013 gautamUpdateCDSCharacterisation of DAC at 1X9 
 I
just finished carrying out the same checks
  
  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 
  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
  
  8949   Thu Aug 1 12:12:35 2013 gautamUpdateCDSNew model for endtable PZTsI have
made a new model for the endtable PZT servo,
and have put it in c1iscex. Model name is
 C1ASX_GDS_TP.png 
  8950   Thu Aug 1 13:09:17 2013 gautamUpdateCDSNew model for endtable PZTs-procedure 
 These
are roughly the steps I followed in setting
  
  8952   Thu Aug 1 15:28:44 2013 gautamUpdateCDSNew model for endtable PZTs-problem solved

    

       
            
  
  8956   Thu Aug 1 20:58:56 2013 gautamUpdateCDSNew model for endtable PZTs-MEDM Screens setup 
I
 MAIN_SCREEN.pdfMATRICES.pdfLOCKINS.pdfCONTROL_FILTERS.pdf 
  8957   Thu Aug 1 21:28:09 2013 gautamUpdateCDSSlow channels set-up in ALS The following
slow channels have been added and are now
  
  8966   Mon Aug 5 18:18:32 2013 gautamUpdateCDSChoosing LO Amplitudes and Frequencies In
order to decide what frequencies to dither
the 4 degrees of freedom (M1-pitch&yaw,
 GTR_Power_Spectrum.pdf 
  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 
  8972   Tue Aug 6 16:36:51 2013 gautamUpdateCDSChoosing LO Amplitudes and Frequencies-revisedI redid
the power spectrum measurement for the X-arm
green transmission after aligning the arm
 powerSpec0806.pdf 
  8983   Wed Aug 7 23:40:49 2013 gautamUpdateCDSX-End Green ASS - A first update I
have done some preliminary testing of the
X-End Green ASS Servo. I will write a more
 time-series.pdf 
  8993   Sat Aug 10 05:53:51 2013 gautamUpdateCDSX-End Green ASS - RoundupOver
the last three days, I've had the interferometer
to test and optimize the ASX Servo. Based
 New_ASX_MEDM_MAIN.pdf 
  11603   Tue Sep 15 20:44:13 2015 gautamSummaryLSCChecking the delay line phase shifter DS050339I checked out the delay line phase shifter
[URL=https://dcc.ligo.org/public/0016/D050339/000/D050339-A.pdf]D050339[/URL],
([URL=https://dcc.ligo.org/public/0001/T050250/001/T050250-v1.pdf]theory
 IMG_20150915_193100.jpgCalibration.pdf 
  11613   Thu Sep 17 17:27:01 2015 gautamUpdateLSCRF micky mouse - dodgy DIN connector blocks fixed[Steve, gautam]

We fixed the problematic DIN connectors
on 1Y2, by swapping out the 3 DIN connector
 DIN_rail_terminal.jpg 
  11615   Thu Sep 17 19:58:06 2015 gautamSummaryComputer Scripts / ProgramsFrequency counting algorithmI made some changes to the c1tst model
running on c1iscey in order to test my algorithm
for frequency counting. I followed the steps
  
  11628   Mon Sep 21 18:31:06 2015 gautamSummaryComputer Scripts / ProgramsFrequency counting algorithmI have been
working on setting up a frequency counting
module that can give us a readout of the
 6x 
  11647   Tue Sep 29 03:14:04 2015 gautamUpdateCDSFrequency divider boxEarlier today, the front panels for the
1U chassis I obtained to house the Wenzel
dividers + RF amplifiers arrived, which meant
 IMG_0014.JPGIMG_0015.JPG 
  11650   Tue Sep 29 19:38:09 2015 gautamUpdateGeneralFOL fiber box revampThe new 2x2 fiber couplers arrived today
so Eric gave me an overview on the changes
to be made to the existing configuration
 IMG_0017.JPGFOL_schematic.pdfIMG_0018.JPGIMG_0016.JPG 
  11652   Wed Sep 30 13:07:13 2015 gautamUpdateGeneralFOL fiber box revampEric pointed out that the 1x2 couplers
that were used in the previous arrangement
and which I recycled, were in fact NOT
 FOL_schematic.pdf 
  11670   Tue Oct 6 16:56:40 2015 gautamUpdateGeneralFOL fiber box revamp[gautam, ericq]

We had a look at the IR beat (PSL+Xarm)
today using the new FOL fiber box, and compared
 20151006_Xbeat_psd.pdf20151006_Xbeat_coherence.pdf 
  11683   Fri Oct 9 19:54:58 2015 gautamUpdateCDSFrequency divider box - installation in 1X2 rackThe new ZKL-1R5 RF amplifier that Steve
ordered arrived yesterday. I installed this
in the frequency divider box and did a quick
 IMG_0027.JPGtime_seris_25MHz.pdf 
  11684   Mon Oct 12 17:04:02 2015 gautamUpdateCDSFrequency divider box - further testsI carried out some more tests on the digital
frequency counting system today, mainly to
see if the actual performance mirrors the
 calibration.pdfsystematics.pdf 
  11690   Wed Oct 14 17:40:50 2015 gautamUpdateCDSFrequency divider box - further testsSummary:

I carried out some further diagnostics
and found some ways in which I could optimize
 time_series_input_signals.pdfcalibration_20151012.pdfsystematics_20151012.pdf 
  11697   Mon Oct 19 11:20:34 2015 gautamUpdateVACRGA scan resetSteve pointed out that in the aftermath
of the Nitrogen running out a couple of times
last week, the RGA had shut itself off thinking
 RGAscan_151019.png 
  11704   Tue Oct 20 17:36:01 2015 gautamUpdateCDSFrequency counting with moving averageI'm working on setting up a moving-average
in the custom C code block that counts the
zero crossings to see if this approach is
  
  11709   Fri Oct 23 18:36:48 2015 gautamUpdateCDSFrequency counting - workable setup preparedI've
made quite a few changes in the software
as well as the hardware of the digital frequency
 Yscan.pdf 
  11712   Sat Oct 24 12:34:43 2015 gautamUpdateCDSFrequency counting - workable setup preparedSorry for the confusion - I did mean Green
beat frequency, and I had neglected the
factor of 2 in my earlier calculations. However,
 Yscan.pdfFrequency_readout.pdf 
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