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  40m Log, Page 12 of 341  Not logged in ELOG logo
ID Date Authorup Type Category Subject Text Attachments
  8862   Wed Jul 17 11:13:36 2013 Alex ColeConfigurationElectronicsAS Table Additions[Eric, Alex]
For the RFPD frequency response project,
we routed the fiber that will connect our
 photo_(1).JPG 
  8863   Wed Jul 17 16:15:42 2013 Alex ColeConfigurationElectronicsAS Table Additions[Eric, Alex]
We decided that the POY Table would
be a better home for our REF DET (Newport
 photo_1_(3).JPGphoto_2_(3).JPGphoto_3.JPG 
  8870   Thu Jul 18 15:34:15 2013 Alex ColeUpdateElectronicsPD Frequency Response Update [Eric, Alex]
Our RF Switch arrived today, and
we mounted it in rack 1Y1 (1st attachment). 
 photo_3_(1).JPGphoto_1_(4).JPGphoto_2_(4).JPG 
  8940   Tue Jul 30 16:21:46 2013 Alex ColeUpdateElectronicsPhotodetector Input Modulation [Eric, Alex]
We successfully used our system to
modulate the input to a single photodetector.
  
  8947   Wed Jul 31 17:02:17 2013 Alex ColeUpdateElectronicsPreliminary Photodetector Frequency Reponse Measurements[Eric, Alex]
We used our setup from yesterday
(elog #8940) to measure transimpedance measurements
 REFL11.jpgREFL33.jpgREFL55.jpgAS55.jpg 
  8955   Thu Aug 1 18:55:20 2013 Alex ColeUpdateElectronicsPreliminary Photodetector Frequency Reponse Measurements

    

       
            
 POX11.jpgPOX11fit.jpg 
  8971   Tue Aug 6 12:43:23 2013 Alex ColeConfigurationElectronicsAS Table and Rack 1Y1 AdditionsFor the photodetector frequency response
project, I finished the construction of our
baluns chassis and mounted it in rack 1Y1
 photo_1_(5).JPGphoto_2_(5).JPG 
  8979   Wed Aug 7 15:51:53 2013 Alex ColeConfigurationElectronicsRF Switch ChangeFor the photodetector frequency response
project, our new RF Switch Chassis (NI pxie-1071)
arrived today. I took the switches out of
 photo_(2).JPG 
  9004   Tue Aug 13 11:40:19 2013 Alex ColeSummaryElectronicsRFPD Demod Filter Frequency Response Measurement For the RF PD Frequency Response
Measurement project, we get each PD signal
from the "PD RF Mon" output of
 photo_(3).JPGtest.jpg 
  9005   Tue Aug 13 11:54:40 2013 Alex ColeHowToElectronicsRF PD Fiber-Coupled Laser OperationThis post pertains to the fiber-coupled
diode laser mounted in rack 1Y1.
To turn the laser on, first turn
 photo_(4).pdf 
  9006   Tue Aug 13 13:30:41 2013 Alex ColeConfigurationElectronicsCable Routing I routed cables (RG405 SMA-SMA) from
several demodulator boards in rack 1Y2 to
the RF Switch in rack 1Y1 using the overhead
 photo_(6).JPG 
  9059   Fri Aug 23 21:01:38 2013 Alex ColeHowToElectronicsAutomated Photodetector Frequency Response System This post describes how to use the
Automated Photodetector Frequency Response
System.
  
  2075   Fri Oct 9 14:23:53 2009 Alex IvanovConfigurationDAQtpchn mystery"Yes. This master file is used."

  
  4779   Thu Jun 2 10:19:37 2011 Alex IvanovSummaryDAQinstalled new daqd (frame builder) program on fb (target/fb/daqd)I hope that new daqd code will fix the
problem with non-aligned at 16 seconds frame
file GPS times.
  
  6094   Fri Dec 9 14:33:16 2011 Alex IvanovUpdateAdaptive FilteringC1OAF

    

       
            
  
  7146   Fri Aug 10 17:17:41 2012 Alex Masha DenUpdatePEMclassify seismic c codeDen and I installed a module in the c1pem
model which has a feedforward neural network
to classify seismic disturbance (10 means
  
  5249   Tue Aug 16 16:59:20 2011 AnamariaUpdateRF SystemAM in the PMKiwamu, Keiko, Anamaria
Looking at the I and Q signals coming
from REFL11 and REFL55 we saw large offsets,
  
  5255   Wed Aug 17 15:47:18 2011 AnamariaUpdateSUSETMX Side Sensor slow channel down for a long timeJenne, Anamaria
We aligned the ETMX OSEMs and ran
into this issue. Looking at the SENSOR_SIDE
  
  5278   Mon Aug 22 20:37:43 2011 AnamariaConfigurationRF SystemPlan for install of 3f PDsI made a quick sketch of how to include
two more RF PDs on the REFL beam, given the
space we have on the table. We want to install
 40m3fReflPdLayout.pdf 
  5284   Tue Aug 23 06:49:24 2011 AnamariaUpdateGeneralmore in-vac work : AS clipping fixed and OSEM/oplev adjustmentWhere was the AS clipping?! Ah, the suspense...


  
  5389   Mon Sep 12 18:45:04 2011 AnamariaConfigurationLSCAP table current layoutBefore we install the REFL 3f PDs I made
a drawing of the current table layout, since
there has been no update lately. Once I've
 40mAPtable.pdf 
  5401   Wed Sep 14 01:19:20 2011 AnamariaConfigurationLSC3f PD Install in ProgressI have reconfigured the refl beam path
on the AP table to include REFL33 and REFL165.
Would be done if we hadn't prepared P BSs
  
  5414   Thu Sep 15 02:18:19 2011 AnamariaUpdateLSCMICH locked and attempt to lock PRCLKiwamu, Keiko, Anamaria
 
We were able to lock PRC using REFL11I
  
  5430   Fri Sep 16 03:22:11 2011 AnamariaUpdateLSCMore Refl PDs Work and Attempt at DRMIKiwamu, Keiko, Anamaria
I started today with a different
input beam, so I had to realign the REFL
  
  5475   Tue Sep 20 03:12:14 2011 AnamariaUpdateSUSJenne's Scripts startedI followed Jenne's instructions, ran the
matrix filler script and then set the optics
to freeswing. Someone has to burt resture
  
  5489   Tue Sep 20 20:58:35 2011 AnamariaConfigurationLSCNew AP Table DrawingAs promised, I have made a final AP table
drawing, including the MC camera relocation
changes by Kiwamu. I have posted it in the
 APtableSep20th.pdf 
  5513   Thu Sep 22 04:49:14 2011 AnamariaUpdateLSCLocking status update - Some Scripts, No LouckThe scripts I wrote can be found in /users/anamaria/scripts/sensemat/
]There are two of them:
- one that sets all the switches,
  
  5525   Thu Sep 22 22:55:01 2011 AnamariaUpdateLSCPOX channel = POY PD connected + Bad Rack Keiko, Anamaria
We decided we needed a DC channel
to sense the gain in the PRC, so we set to
 RFPDpowerRack2.pdf 
  5545   Mon Sep 26 15:15:45 2011 AnamariaUpdateLSCRealignment of REFL / Some 3f PRMI locking / Recycling GainA few comments on REFL table alignment
and REFL165.
Last time we realigned the table
  
  5243   Mon Aug 15 21:43:29 2011 Anamaria and KeikoSummaryLockingcentral part ifo locking project REFL33 and REFL165 cables were connected
from the AP table to the rack.  Cables
on the rack for REFL33I, 33Q, 165I, 165Q
  
  15762   Wed Jan 13 16:09:29 2021 AnchalHowToCDSAcromag wiring investigationI'm working on a better wiring diagram
that takes into account multiple power supplies,
how their GND is passed forward to the circuits
 SimpleTestsStriptoolImages.pdf 
  15774   Wed Jan 20 18:07:09 2021 AnchalSummaryBHDHAM-A Coil Driver measurements before modificationsI have taken transfer functions and noise
measurements of the two HAM-A coil driver
boxes D1100687 #S2100027 and #S2100028. All
 7x 
  15776   Mon Jan 25 18:18:04 2021 AnchalSummaryBHDSatellite Amplifier Transfer Functions and noise 

I took transfer function and noise
measurement of satellite amplifier box's
 D1002818_S2100029_TFandNoiseSpectrum.pdfD1002818_Testing.zip 
  15778   Tue Jan 26 12:59:51 2021 AnchalHowToCDSAcromag wiring investigationTaking inspiration from SR785 on how it
reads differential signal, I figured that
acromag too always need a way to return current
 TestingDifferentialSignalWithFloatingRTNwrtIN-.pdf 
  15779   Tue Jan 26 15:37:25 2021 AnchalHowToCDSAcromag wiring investigationHere I present few wiring diagrams when
using Acromag to avoid noisy behavior and
ground loops.
 GeneralLabWiring.pdfGeneralLabWiring2.pdfGeneralLabWiring3.pdf 
  15780   Thu Jan 28 12:53:14 2021 AnchalSummaryBHDHAM-A Coil Driver measurements before modificationsI took some steps to reduce the coupling
of 60 Hz harmonics in noise measurement.
The box was transferred to the floor instead
 D1100117_S2100027_Current_Noise_Spectrum.pdfD1100117_S2100027_Voltage_Noise_Spectrum.pdfD1100117_S2100028_Current_Noise_Spectrum.pdfD1100117_S2100028_Voltage_Noise_Spectrum.pdfSpectrumMeasurement.zip 
  15781   Thu Jan 28 18:04:55 2021 AnchalSummaryBHDHAM-A Coil Driver measurements After modificationsI did the recommended
modifications on of the boards with serial
number S2100028. These included:
 D1100117_S2100027_TF.pdfAfterChanges.zip 
  15784   Fri Jan 29 15:39:30 2021 AnchalSummaryBHDHAM-A Coil Driver measurements After modifications TF and Noise S2100027I fitted zeros and poles in the measured
transfer function of D1100687 S2100027 and
got zeros at 130 Hz and 234 Hz and poles
 D1100687_S2100027_After_Modifications_Jan28.jpgD1100117_S2100027_TF.pdfD1100117_S2100027_Voltage_Noise_Spectrum.pdfD1100117_S2100027_Current_Noise_Spectrum.pdfAfterChanges.zip 
  15785   Fri Jan 29 17:57:17 2021 AnchalHowToCDSAcromag wiring investigationI found a
white paper  from Acromag which
discusses how to read differential signal
 GeneralLabWiringDiffWith2Wires.pdfGeneralLabWiringDiffWith3Wires.pdfDiffReadResistorbtwnINandRTN.pdf 
  15787   Tue Feb 2 11:57:46 2021 AnchalSummaryBHDHAM-A Coil Driver measurements After modifications TF and Noise S2100028I have made the modifications on the other
board D1100687 S2100028 as well. The measurements
were taken as mentioned in 40m/15784.
 D1100687_S2100028_After_Modifications_Feb01_2021.jpgD1100117_S2100028_TF.pdfD1100117_S2100028_Voltage_Noise_Spectrum.pdfD1100117_S2100028_Current_Noise_Spectrum.pdfAfterChanges.zip 
  15793   Wed Feb 3 16:27:19 2021 AnchalSummaryBHDSatellite Amplifier Transfer Functions and noise After modificationsI have made modifications recommended in
this doc.
The changes made are:
 D1002818_S2100029_TFAfterChanges.pdfD1002818_S2100029_OutputNoiseSpecAfterChanges.pdfD1002818_S2100029_InputRefferedNoiseSpecAfterChanges.pdfD1002812_S2100029_After_Modifications_Feb3.jpgAfterChanges.zip 
  15797   Wed Feb 10 11:45:59 2021 AnchalSummaryBHDSatellite Amplifier Very Low frequency noise After modificationsAs suggested, I wrapped the satellite amplifier
box D10028128 S2100029 in blanket and foam
and took very low frequency spectrum starting
 6x 
  15799   Wed Feb 10 15:07:50 2021 AnchalSummaryBHDSatellite Amplifier Output Offset measurementsI measured the output DC voltage of the
satellite amplifier box at PDMon port when
the PDA input was shorted
  
  15803   Thu Feb 11 11:10:05 2021 AnchalSummaryBHDSatellite Amplifier Very Low frequency noise After modificationsHere is a proper measurement for PD transimpedance
amplifier circuit in the Satellite amplifier
box D1002818 S2100029. The input from rear
 AfterChangesSpectrum_AC.zipD1002818_S2100029_OutputNoiseSpecAfterChanges.pdfD1002818_S2100029_InputRefCurrentNoiseSpecAfterChanges.pdfD1002818_S2100029_InputRefDispNoiseSpecAfterChanges.pdf 
  15876   Sun Mar 7 19:56:27 2021 AnchalUpdateLSCSensing matrix settings messed withI understand this mst be frustrating for
you. But we did not change these settings,
knowingly atleast. We have documented all
  
  15896   Wed Mar 10 15:29:58 2021 AnchalSummaryIMCIMC free swinging prepNo we didn't fix the issue. We'll
post some screenshots tomorrow. From "sitemap>Shutter>PSL"
we meant in Shutter medm window, we clicked
  
  15916   Fri Mar 12 18:10:01 2021 AnchalSummaryComputer Scripts / ProgramsInstalled cds-workstation on allegraallegra had fresh Debian 10 installed on
it already. I installed cds-workstation packages
(with the help of Erik von Reis). I checked
  
  15934   Wed Mar 17 16:30:46 2021 AnchalUpdateSUSNormalized Input Matrices plotted better than SURF studentsHere, I present the same input matrices
now normalized row by row to have same norm
as current matrices rows. These now I plotted
 IMC_InputMatrixDiagonalization.pdfNewAndOldMatrices.zip 
  15971   Sun Mar 28 14:16:25 2021 AnchalSummarySUSMC3 new Input Matrix not providing stable loopRana asked us to write out here the new
MC3 input matrix we have calculated along
with the old one. The new matrix is not working
 MC3_Input_Matrix_Diagonalization.pdf 
  15988   Thu Apr 1 21:13:54 2021 AnchalUpdateSUSMatrix results, new measurement set to trigger
New
Input matrix used for MC2 (C1:SUS-MC2_INMATRIX_ii_jj


  
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