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ID Date Authorup Type Category Subject Text Attachments
  2915   Wed May 12 02:35:13 2010 Koji, Rana, KiwamuUpdateGreen LockingReflection from ETM and ITM !We succeeded in getting
the reflected green beam from both ITMY and
  
  2290   Wed Nov 18 11:27:33 2009 Koji, josephbConfigurationSUSETMY suspension conencted to megatron ADC/DAC

    
        
  
  2291   Wed Nov 18 12:33:30 2009 Koji, josephbConfigurationSUSETMY suspension conencted to megatron ADC/DACHurraaaah!
We've got the damping of the suspension.
The Oplev loops has also worked!
The
 Untitled.png 
  12640   Wed Nov 23 20:08:51 2016 Koji, ranaUpdateIOOMC WFS Demod/Whitening boards removed from the IOO rackWe removed one set of the MC WFS
demod board and whitening board from the
IOO rack for the investigation.
  
  10162   Wed Jul 9 11:41:12 2014 KoushikUpdatePSLPMC local oscillator is going wonky

    

       
            
  
  14621   Sat May 18 12:19:36 2019 KruthiUpdate CCD calibration and telescope designI went through all the elog entries related
to CCD calibration. I was wondering
if we can use Spectralon diffuse
 6x 
  14633   Thu May 23 10:18:39 2019 KruthiUpdateCamerasCCD calibrationOn Tuesday, I tried reproducing Pooja's
measurements (https://nodus.ligo.caltech.edu:8081/40m/13986).
The table below shows the values I got.
 setup.jpegled_circuit.jpegled_schematic.pdfLED_plot.png 
  14639   Sun May 26 21:47:07 2019 KruthiUpdateCamerasCCD Calibration 

On Friday, I tried calibrating
the CCD with the following setup. Here, I
 CCD_calibration_setup.png 
  14644   Fri May 31 01:38:21 2019 KruthiUpdateCamerasTelescope[Kruthi, Milind]

Yesterday, we were able to
capture some images of objects at a
 telescope_mug_image.pdf 
  14651   Tue Jun 4 00:11:45 2019 KruthiUpdateCamerasGigE setupChub and I are trying to figure out a way
to co-mount GigE into the existing cylindrical
enclosure. I'm attaching a picture of
 MC2.pdfSetup_3.pngSetup_1.pngSetup_2.png 
  14660   Sun Jun 9 21:24:00 2019 KruthiUpdateCamerasGigE setupI managed to fit all the parts into the
cylindrical enclosure without having to drill
a hole in the enclosure to mount the analog
 GigE_setup.jpgGigE_setup_top_view.jpg 
  14663   Tue Jun 11 00:25:05 2019 KruthiUpdateCamerasGigE setup[Kruthi, Milind]

Today, with Milind's help,
I installed the analog camera into the MC2
 MC2_analog_setup.jpgtelescope.pdf 
  14665   Wed Jun 12 02:15:50 2019 KruthiUpdateCamerasGigE setup[Koji, Kruthi]

Yesterday, Koji helped me clean
all the optics that are being used for the
 MC2_GigE_setup.jpg 
  14666   Wed Jun 12 21:55:34 2019 KruthiUpdateCamerasGigE setupI'm attaching a picture of the screen.
I just positioned the enclosure by turning
it a bit and I suppose we can see the
 MC2_analog_pic.jpg 
  14674   Fri Jun 14 00:40:33 2019 KruthiUpdateCamerasGigE setupToday, I tried aligning it further; I'm
attaching a picture of it. We are not able
to see all the 4 OSEMs yet. In the reference
 Reference_image_taken_with_previous_analog_camera_setup.jpegMC2_image.JPG 
  14676   Sat Jun 15 00:03:26 2019 KruthiUpdateCamerasGigE setupThe analog camera is aligned and we are
able to see all the 4 OSEMs (pictures attached).
Due to secondary reflection from the
 mc2_GigE.pdfMC2_analog.jpegMC2_analog_OSEMs.jpeg 
  14692   Mon Jun 24 13:48:36 2019 KruthiConfigurationCDSGiada wireless connection[Gautam, Kruthi]

This afternoon, Gautam helped me
setup Giada to access the GigE installed
  
  14695   Tue Jun 25 11:54:47 2019 KruthiUpdateCamerasGigETurns out, focusing the GigE is actually
a bit tricky. With pylon, everytime I change
the exposure or the focus, I'm running
 MC2_GigE.pdfCameras_final_setup.JPG 
  14702   Wed Jun 26 19:12:00 2019 KruthiUpdateCamerasGigEThe GigE is focused now (judged by eye)
and I have closed the lid. I'm attaching
a picture of the MC2 beam spot, captured
 MC2_GigE_image.pdf 
  14708   Sat Jun 29 03:11:18 2019 KruthiUpdateCamerasCCD CalibrationFinding the gain of the Photodiode:
The three-position rotary switch of the photodiode
being used (PDA520) wasn't working, so
 calibration_setup.jpgCCD_calibration_2.jpegGigE_spectral_response_curve.png152_calibration_plot.png 
  14732   Sun Jul 7 21:59:28 2019 KruthiUpdateCamerasGhost image due to beamsplitterThe beam splitter (BS1-1064-33-2037-45S) that
is currently being used has an antireflection
coating on the second surface and a wedge
 ghosting_schematic.pngBeamsplitter_spec.pdf 
  14733   Mon Jul 8 17:33:10 2019 KruthiUpdateLoss MeasurementOptical scattering measurementsI came across a paper (see reference) where
they have used DAOPHOT, an astronomical software
tool developed by NOAO, to study the point
  
  14752   Thu Jul 11 16:22:54 2019 KruthiUpdateGeneralProjector lightbulb blown outI heard a popping sound in the control
room; the projector lightbulb has blown out.
  
  14757   Sun Jul 14 00:24:29 2019 KruthiUpdateCamerasCCD CalibrationOn Friday, I took images for different
power outputs of LED. I calculated the calibration
factor as explained in my previous
 CCD_calibration.png 
  14758   Mon Jul 15 03:15:24 2019 KruthiUpdateLoss MeasurementImaging scatterometer On Friday, Koji helped me find various
components required for the scatterometer
setup. Like he suggested, I'll first
  
  14759   Mon Jul 15 03:30:47 2019 KruthiUpdateCalibration-RepairWhite paper as a Lambertian scattererI made some rough measurements, using the
setup I had used for CCD calibration, to
get an idea of how good of a Lambertian scatterer
 BRDF_paper.png 
  14766   Wed Jul 17 03:05:01 2019 KruthiUpdateASSMC spot position measurement scripts[Kruthi, Gautam, Rana]

Gautam installed Atom text editor on Pianosa
yesterday.
  
  14768   Wed Jul 17 20:12:26 2019 KruthiUpdateCamerasAnother GigE in place of analog cameraI've taken the MC2 analog  zoomed_out_gige.pngosems_mc2.pngMC2.pdf 
  14774   Thu Jul 18 22:03:00 2019 KruthiUpdateCamerasMC2 and cameras[Kruthi, Yehonathan, Gautam]

Today evening, Yehonathan and I
aligned the MC2 cameras. As of now there
  
  14782   Fri Jul 19 22:48:08 2019 KruthiUpdate Dataviewer errorI'm not able to get trends of
the TM adjustment test that Rana had
asked us to perform, from the dataviewer.
  
  14788   Sun Jul 21 02:07:04 2019 KruthiUpdateLoss MeasurementMC2 loss mapI'm running the MC2 loss map scripts
on pianosa now. The camera server is throwing
an error and is not grabbing snapshots :(
  
  14791   Sun Jul 21 17:17:03 2019 KruthiUpdateLoss MeasurementMC2 loss mapThe camera server keeps throwing the error:
failed to grab frames. Milind suggested that
it might a problem with the ethernet cable,
  
  14796   Mon Jul 22 12:57:35 2019 KruthiUpdateLoss MeasurementMC2 loss mapIn my script I have used "CAM-ETMX_SNAP"
only; while entering it in the elog
I made a mistake, my bad!
  
  14797   Mon Jul 22 13:26:41 2019 KruthiUpdateIOOMC lockedThe MC2 has 2
GigE cameras right now. I'll
put back the analog asap.
  
  14798   Mon Jul 22 13:32:55 2019 KruthiUpdateSUSTest mass pitch adjustment test[Kruthi, Milind]

On Friday, Milind and I performed
the pitch adjustment test Rana had asked
 6x 
  14803   Wed Jul 24 02:06:05 2019 KruthiUpdateCamerasHDR imagesI have been trying a couple of HDR algorithms,
all of them seem to give very different results.
I don't know how suitable these algorithms
 6x 
  14804   Wed Jul 24 04:20:35 2019 KruthiUpdateCalibration-RepairMC2 pitch and yaw calibrationSummary:  I calibrated MC2
pitch and yaw offsets to spot position in
mm. Here's what I did:
 Pitchyaw_calibration.png 
  14824   Fri Aug 2 16:46:09 2019 KruthiUpdateCamerasClean upI've put the analog camera back and
disconnected the 151 unit GigE. But I ran
out of time and wasn't able to replace
  
  10829   Mon Dec 22 15:46:58 2014 KurosawaSummaryIOOSeven transfer functionsIMC OL TF has been measured from 10K to
10M
 MC_OLTF.pdf 
  3235   Fri Jul 16 13:05:48 2010 Kyung-haUpdateSUSLate update for 7/13 Tue (Tip Tilts)[Jenne & Kyung-ha]
We suspended the mirror to one of
the main frame with the ECD backplane we
  
  6383   Wed Mar 7 23:28:41 2012 Lab Cleanup CrewHowToEnvironmentTrue Beauty....Or,
how a lab should
look at the end of every day. 
 Clean_40m_Electronics_Bench.jpg 
  4307   Wed Feb 16 10:35:40 2011 Larisa ThorneUpdateIOOWFS quantum efficiency as a function of angle Here is the followup on Jenne's February
14th, 2011 update on the quantum efficiency
measurements of WFS2.
 QEcalcs.pdf 
  4346   Wed Feb 23 16:56:17 2011 Larisa ThorneUpdateVIDEOCable laying...continuedHaving finished labeling the existing cables
to match their new names, we (Steve, Kiwamu
and Larisa) moved on to start laying new
  
  4358   Fri Feb 25 14:35:06 2011 Larisa ThorneUpdateElectronicsTotal harmonic distortion results for +7dBm mixer This experiment deals with measuring
the total harmonic distortion (THD) contribution
 THDcircuit.jpgPhoto_on_2011-01-17_at_12.25.pngTHDwithoutamp.pdf 
  4374   Thu Mar 3 18:32:33 2011 Larisa ThorneUpdateElectronicsHarmonic distortion calculations for RF distribution boxFinished calculations for harmonic distortion
at each of the 10 outputs of the RF distribution
box. The diagram can be found on Suresh's
 RFdistribboxcalcs.pdf 
  4402   Thu Mar 10 17:03:48 2011 Larisa ThorneConfigurationElectronicscalculations for passive low pass filter on X arm[Kiwamu, Larisa] 
 
We want to increase gain in the lower
  
  4434   Wed Mar 23 16:06:20 2011 Larisa ThorneUpdateElectronicsUpdate on cable laying [Steve, Suresh, Larisa]
The following cables were laid today:
ETMYT, ETMY, IFOPO, MC1, OMCR, AS Spare,
  
  4456   Tue Mar 29 15:01:58 2011 Larisa ThorneUpdateElectronicsLow pass filter for X arm laser temperature control This is the continuation of http://nodus.ligo.caltech.edu:8080/40m/4402
 
 DSC_2889.JPGLPFgraph.pdf 
  4462   Wed Mar 30 17:01:08 2011 Larisa ThorneUpdateVIDEOCable laying...continued[Steve, Suresh, Kiwamu, Larisa]
 
Only the PRM/BS cable was laid today.
  
  4492   Wed Apr 6 16:02:07 2011 Larisa ThorneUpdateElectronicsCable laying...continued[Steve, Kiwamu, Larisa]
 
Having finished laying new cable
  
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