40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
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ID Date Authordown Type Category Subject Text Attachments
  137   Wed Oct 19 16:40:24 2016 sults:GeneralMeasurementsS1600349S1600439, not annealed, as received
from Mark Optics

Installation


installed
and balanced, pump down started at 4:38pm
 10x 
  12   Sun May 8 13:35:04 2016 ranaElectronicsDesignDesign of optical lever electronics Koji, Rich, and I recently came up with
a new QPD design which is better for general
lab use than the aLIGO ones (which have a
  
  131   Wed Sep 28 10:26:58 2016 ranaGeneralGeneralreferences on ideal glassesSome easy to read reviews on
thin films and ideal glass for people getting
started in this Q measuring game.



  
  244   Sat Dec 17 06:29:15 2016 ranaElectronicsConfigurationTiming issue: is it a DAC issue?I find sometimes that the probe configuration
can give these distorted signals. For the
Tektronix probes, its best to use a 500 MHz
  
  1   Wed Jul 11 23:01:01 2012 janoschOpticsCharacterizationstarting the multi-color scatter experimentSteve Maloney, a visiting highschool teacher,
and I have started to set up a new scattering
experiment in the Richter lab. The idea is
 DSCF3148.JPGDSCF3151.JPGDSCF3150.JPG 
  2   Fri Jul 13 10:34:35 2012 janoschOpticsCharacterizationcamera imageWe were confused a bit about how the camera
image changes when you move the arm that
holds the camera and lens around the
  
  3   Fri Jul 13 20:53:35 2012 janoschOpticsCharacterizationtwo imagesThe following two pictures were taken from
the same angle with green (left) and red
(right) incident laser at an angle of 15deg
 Green.pngRed.png 
  4   Tue Jul 17 18:32:11 2012 janoschOpticsCharacterizationpurple imagesWe have the new 405nm laser pointer. 
The image to the left shows the scattered
light from the red laser, the image to the
 Red_30deg.pngPurple_30deg.png 
  5   Wed Jul 18 18:43:34 2012 janoschOpticsCharacterizationgone with the windHere a little purple video. It starts with
scattering angle around 15deg and stops at
about 80deg. 
 Purple.avi 
  6   Fri Jul 20 18:35:42 2012 janoschOpticsCharacterizationpurple improvements and first uncalibrated BSDF curvesToday we improved alignment of the lens-camera
arm. We discovered earlier that this alignment
affects the amount of "snowfall"
 Purple.mp4Red.mp4Purple_BSDF.pngRed_BSDF.png 
  7   Tue Jul 24 10:59:59 2012 janoschOpticsCharacterizationsum of purple and redWe played around with Matlab today. The
first step was to convert light wavelengths
into RGB colors. In this way we can combine
 ImageSum.png 
  8   Fri Oct 12 16:23:20 2012 janoschOpticsDaily Progressreassembled setupNothing has happened since Steve, the visiting
highschool teacher, has left. Meanwhile,
some parts of the multi-color BRDF setup
  
  173   Thu Nov 10 14:13:34 2016 gabrieleElectronicsConfigurationMATLAB code to control Thorlabs stagesTo be used to automate the laser polishing.  move_complete.mthrolabs_activex.manimation.mdraw_wafer.m 
  40   Thu Jul 14 15:30:48 2016 ericqElectronicsConfigurationCymac RTS configurationWe played around a bit with the cymac,
in efforts to make things better.


We disabled some more fancy-sounding
  
  702   Fri May 24 15:08:19 2019 alenaGeneralMeasurementsS1600713 S1600714 S1600715 S16007162019-05-24


15:00 in
chamber

S1600713 in CR1
S1600714
in CR2
S1600715in CR3
S1600716
  
  689   Mon May 13 18:37:47 2019 aaronCleanGeneralClean room gearMon May 13 18:37:37 2019

Entered CRIME lab to borrow 4x
hair nets and face masks. Can you 
  
  696   Mon May 20 10:35:45 2019 aaronCleanGeneralClean room gearAaron,

There is a buy list of approved
clean room supplies posted here https://dcc.ligo.org/LIGO-E1300399.
  
  401   Wed Aug 9 17:07:57 2017 ZacharyElectronicsModelingOptimization Summary2017-08-09



p.p1 {margin: 0.0px 0.0px
0.0px 0.0px; font: 11.0px 'Helvetica Neue';
 6x 
  420   Fri Aug 18 15:10:23 2017 Zach, GabrieleElectronicsModelingESD prototype2017-08-18


We created
a prototype of PCB for the ESD design. Unfortunately
the orientation of the two combs was flipped,
 Crime_ESD_Zach_prototype.pdf 
  421   Wed Aug 23 14:11:13 2017 Zach, GabrieleElectronicsMeasurementsInstalling ESD Prototype2017-08-23


Installed
ESD Prototype design by taping it to the
older design, we then lowered the mount until
 image1.JPGimage2.JPG 
  351   Thu Jun 22 13:16:37 2017 ZachElectronicsModelingBeginning with COMSOL2017-06-21


4:30 pm-
Installed COMSOL, began modeling current
ESD by creating parameters and the first
  
  352   Thu Jun 22 15:37:20 2017 ZachElectronicsModelingBeginning modeling2017-06-22


Created
the geometry of the ESD by creating blocks
and joining them with Unions. I then created
 E_Plot.png 
  353   Fri Jun 23 12:02:12 2017 ZachElectronicsModelingPlots2017-06-23


I created
plots of the E field and potential from my
rough model of the ESD. This model has 1mm
 Potential.pngE_w_Lines.pngMesh.png 
  356   Tue Jun 27 14:17:47 2017 ZachElectronicsModelingFurther plots and improving models2017-06-27


I built
a new model of the ESD to determine whether
or not the spikes in the electric field at
 E_field_corner.pngE_field_round.png 
  359   Thu Jun 29 16:40:41 2017 ZachElectronicsModelingAccurate model and force profile2017-06-29


I created
a much more accurate model of the current
ESD setup from the technical drawings. My
 Force.pnggeometry.pngMesh.png 
  360   Fri Jun 30 11:02:18 2017 ZachElectronicsModelingMatching Forces2017-06-30


I adjusted
the plot parameters slightly so that it only
showed the actual force profile on the sample
 ForceE.pngForceP.png 
  361   Fri Jun 30 16:27:56 2017 ZachElectronicsModelingDouble Checking Model2017-06-30


In order
to confirm the accuracy of my model I checked
some easily computable quantities between
  
  363   Wed Jul 5 12:01:51 2017 ZachElectronicsModelingForce plots-Correct plots, force issue2017-07-05


I sorted
out my mathematical lapse in logic and computed
the correct force profiles in the perpendicular
 Force_E2.pngForce_PE.png 
  364   Wed Jul 5 16:40:51 2017 ZachElectronicsModelingForce disparity-improvement2017-07-05


In order
to improve my data I shrunk the region of
the finer meshing slightly and made the mesh
 1ForceE2.png1ForcePE.png 
  365   Thu Jul 6 12:08:35 2017 ZachElectronicsModelingChecking physical parameters2017-07-06


I compared
the electric field and the polarization to
make sure that those calculations made sense.
 E_from_P.pngE_from_E.png 
  366   Thu Jul 6 12:48:54 2017 ZachElectronicsModelingResolving the factor of two2017-07-06

I resolved the factor
of two from Griffiths' discussion of
dipoles in non-uniform electric fields. The
  
  367   Wed Jul 12 15:08:59 2017 ZachElectronicsModelingModel of actuator and sample2017-07-12


I am attaching
the first fully functioning model of the
actuator and sample. I cleared both meshes
 Force_Model.mph 
  368   Fri Jul 14 16:43:24 2017 ZachElectronicsModelingForce profile matlab script2017-07-14


I have completed
a rough, but functioning script that calculates
the modal force profiles. The force values
 forces.mfaster.m 
  371   Thu Jul 20 11:37:01 2017 ZachElectronicsModelingMatlab Script2017-07-20


I believe
my MATLAB script successfully calculates
the force distribution into each of the modes
 forces.m 
  375   Mon Jul 24 09:13:45 2017 ZachElectronicsModelingParametric Sweep2017-07-24


I wrote
a MATLAB script that is capable of sweeping
parameters, the code is attached. The next
 gap_plot.jpgforcesweep.m 
  378   Tue Jul 25 13:38:30 2017 ZachElectronicsModelingParametric Sweep of ESD gap2017-07-25


I completed
a short sweep of the gap between the drive
and the sample, between .5 and 1 mm in .1
 modeplotESDgap.jpg 
  379   Wed Jul 26 09:27:40 2017 ZachElectronicsModelingSweeping the space between ESD and sample2017-07-26


I ran a
sweep of the gap between the ESD and the
sample, first from .5 mm to 1 mm. That sweep
 Gap_near_one.jpggap_sweep.jpgGap_near_one.jpg 
  381   Wed Jul 26 21:22:50 2017 ZachElectronicsModelingParametric Sweep Results2017-07-26


I resolved
the major bugs in the parametric sweep scripts
and ran low resolution sweeps of the gap
 ESD.armgap.jpgESD.sample.gap.jpg 
  382   Thu Jul 27 13:37:31 2017 ZachElectronicsModelingCorrected sample gap sweep2017-07-27


I resolved
a couple more data processing bugs and calculated
a sweep of the ESD-Sample gap from a distance
 Fine_sample_gap.jpgFine_sample_gap.jpgfine_arm_gap.jpgfine_arm_gap.jpg 
  383   Thu Jul 27 16:56:03 2017 ZachElectronicsModelingOffset Sweep2017-07-27


I ran a
low resolution sweep of the offset in the
arms of the ESD, the space between the end
 Offset.jpgOffset.jpg 
  386   Tue Aug 1 16:10:42 2017 ZachElectronicsModelingImproved Gap Sweep2017-08-01


I completed
an improved sweep of the gap between the
ESD arms. I resolved some code issues, since
 Better.jpgmode_14.jpgmode_19.jpgmode_25.jpg 
  388   Wed Aug 2 13:47:47 2017 ZachElectronicsModelingArm width Sweep2017-08-02


I ran a
sweep of the width of the ESD arms. There
appears to be a linear relationship across
 Arm_width_fine.jpgmode_25.jpg 
  389   Wed Aug 2 15:40:00 2017 ZachElectronicsModelingParameter diagramI am posting a diagram of the geometric
parameters that I swept. The only one not
included is the vertical space between the
 ESD_w_param.png 
  394   Mon Aug 7 13:19:48 2017 ZachElectronicsModelingNormalized data2017-08-07


I included
the modal mass factors in the code and renormalized
my data. The normalization has a noticeable
 Arm_gap.pdfArm_width.pdfOffset.pdfSample_Gap.pdf 
  398   Tue Aug 8 16:20:24 2017 ZachElectronicsModelingRotated ESD 2017-08-08


I rotated
the ESD and calculated it's modal projections
by rotating the data array that MATLAB extracts
 ESD.pdfRotated.pdfresonantmodes.pdf 
  399   Wed Aug 9 12:10:47 2017 ZachElectronicsModelingPreliminary improvement from ESD optimization2017-08-09


I created
a plot of the ratio of the force in the optimized
design to the force in the original design.
 Ratio.jpgRatio.jpgo_gap.jpgOriginal.jpgOptimized.jpg 
  400   Wed Aug 9 15:57:28 2017 ZachElectronicsModelingTriangular Geometry2017-08-09


I compared
the triangular geometry to the original geometry
and the excitation was only improved
 tratio.jpg 
  402   Thu Aug 10 10:47:54 2017 ZachElectronicsModelingGeometry Ratios2017-08-10


The attached
plots compare the new and old geometries
with .5 mm and 1 mm sample gaps. They are
 Optimization_plot_lin.pdfOptimization_plot_log.pdf 
  407   Tue Aug 15 00:09:01 2017 ZachElectronicsModelingESD Improvements2017-08-14


I did my
best to increase the excitation in the higher
order modes. By making the ESD narrower (a
 10x 
  411   Wed Aug 16 10:04:24 2017 ZachElectronicsModelingESD along edge2017-08-16


I placed
created a very narrow ESD placed along the
edge of the sample. The thought behind this
 edge.jpgoverlay15.jpgoverlay15.jpg 
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