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  Coating Ring-down Measurement Lab elog, Page 11 of 18  Not logged in ELOG logo
ID Date Author Type Category Subject Text Attachments
  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 
  380   Wed Jul 26 16:22:22 2017 GabrieleGeneralMeasurementsS1600528 S16005312017-07-26


4:14pm in
chamber

S1600528 in CR1
S1600531
in CR2


4:16pm
  
  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 
  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 
  377   Tue Jul 25 11:22:37 2017 GabrieleGeneralMeasurementsS1600548 S1600550 S16005382017-07-25


11:12am
in chamber (non standard order is not a typo!!)

S1600548
in CR1
S1600550 in CR2
S1600538
  
  376   Mon Jul 24 16:06:11 2017 GabrieleGeneralMeasurementsS1600530 S1600532 S1600537 S16005392017-07-24


3:55pm installed
in chamber

S1600530 in CR1
S1600532
in CR2
S1600537 in CR3
S1600539
  
  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 
  374   Sat Jul 22 13:05:46 2017 GabrieleGeneralMeasurementsS1600533 S1600535 S1600536 S16005472017-07-22


12:55pm
in chamber

S1600533 in CR1
S1600535
in CR2
S1600536 in CR3
S1600547
  
  373   Fri Jul 21 14:55:02 2017 GabrieleGeneralMeasurementsShear and bulk losses in annealed tantalaI repeated the analysis for bulk and shear
losses described in an early
elog entry, with the same coating, but
 8x 
  372   Fri Jul 21 08:42:09 2017 GabrieleGeneralMeasurementsS16005252017-07-21


8:30am,
in chamber (CR4)
8:32am, roughing
pump on
8:41am, turbo pump on
Excitations


Quiet
  
  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 
  370   Wed Jul 19 21:19:14 2017 GabrieleGeneralMeasurementsShear and bulk losses in tantalaTo quantify which of the fit below is the
most significant, I did a Bayesian analysis
(thanks Rory for the help!).
  
  369   Tue Jul 18 09:13:08 2017 GabrieleGeneralMeasurementsShear and bulk losses in tantalaS1600525 has been coated in Fort Collins
with 480nm of pure tantala. I used the emasured
loss angles (after deposition, before annealing)
 7x 
  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 
  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 
  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
  
  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 
  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 
  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 
  362   Wed Jul 5 10:01:29 2017 GabrieleGeneralMeasurementsS1600547 S1600548 S1600549 S16005502017-07-05


NOTE: at
9:40am switched off turbo pump in CR0 to
avoid  vibrations
NOTE:
  
  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
  
  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 
  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 
  358   Thu Jun 29 13:15:01 2017 Alastair, GabrieleGeneralGeneralLaser polishingWe laser polished S1600546, 547, 548, 549,
550 and 551
  
  357   Wed Jun 28 15:50:15 2017 GabrieleGeneralMeasurementsS16005412017-06-28

We plan to leave
S1600541 in vacuum for a long period, and
measure the Q's periodically.
  
  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 
  355   Tue Jun 27 09:20:16 2017 AlenaGeneralAnnealingAnnealing run (546-551) on 3" wafers - Crime 06/27/2017Started annealing run https://dcc.ligo.org/T1700293

Will be ready by June 28th afternoon
  
  354   Sat Jun 24 12:59:27 2017 GabrieleGeneralMeasurementsS1600541 S1600542 post annealing2017-06-24


12:47pm
in chamber

S1600541 in CR1
S1600542
in CR3


12:50pm
  
  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 
  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 
  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
  
  350   Wed Jun 21 17:04:20 2017 AlenaGeneralAnnealingAnnealing run (541-542) on 3" wafers - Crime 06/25/2017Started an annealing run https://dcc.ligo.org/LIGO-T1700271

Will be ready by Friday morning

 
  
  349   Tue Jun 20 16:01:27 2017 Gabriele, Zach, AlastairGeneralMeasurementsS1600541 S1600542 (laser polished)2017-06-20


The two
substrates were laser polished (CO2 power
~ 23 W)
3:50pm installed in chamber

S1600541
  
  348   Fri Jun 16 15:56:55 2017 GabrieleGeneralMeasurementsS1600541 S16005422017-06-16


3:25pm in
chamber

S1600541 in CR1
S1600542
in CR3


3:45pm,
  
  347   Thu Jun 15 11:20:13 2017 GabrieleGeneralMeasurementsS1600539 S16005402017-06-15


11:13am
in chamber

S1600539 in CR1
S1600540
in CR3


11:14am
  
  346   Wed Jun 14 16:53:54 2017 GabrieleGeneralMeasurementsS16005462017-06-14


4:44pm in
chamber

S1600546 in CR1


4:47pm
roughing pump on
4:55pm turbo
  
  345   Fri Jun 2 16:04:12 2017 GabrieleGeneralMeasurementsS1600525 S16005262017-06-02


3:55pm in
chamber:

S1600525 in CR1
S1600526
in CR3


3:56pm
  
  344   Tue May 16 13:44:01 2017 GabrieleGeneralGeneralEffect of meshing on dilution factor simulationI ran a series of COMSOL simulations to
compute the dilution factors of a coated
disk with the dimensions we are currently
 D_vs_size.pngD_vs_nc.pngD_vs_ns.png 
  343   Mon May 15 13:19:12 2017 GabrieleGeneralMeasurementsQ measured again after four weeks in vacuumI measured again two of the substrates
that have been sitting in the pumped-down
vacuum chamber for about four weeks. The
 comparison.pngcomparison.png 
  342   Thu Apr 20 09:10:25 2017 GabrieleGeneralMeasurementsS1600542 S1600543 S1600544 S16005452017-04-20


9:09am in
chamber

S1600542 in CR1
S1600543
in CR2
S1600544 in CR3
S1600545
  
  341   Fri Apr 14 13:49:17 2017 GabrieleGeneralMeasurementsS1600538 S1600539 S1600540 S16005412017-04-14


1:45pm in
chamber

S1600538 in CR1
S1600539
in CR2
S1600540 in CR3
S1600541
  
  340   Tue Apr 11 14:07:48 2017 GabrieleGeneralMeasurementsS1600533 S1600535 S1600536 S16005372017-04-11


2:02pm,
in chamber

S1600533 in CR1
S1600535
in CR2
S1600536 is CR3
S1600537
  
  339   Mon Apr 10 16:22:12 2017 GabrieleGeneralMeasurementsS1600529 S1600530 S1600531 S16005322017-04-10


4:10pm,
in chamber:

S1600529 in CR1
S1600530
in CR2
S1600531 in CR3
S1600532
  
  338   Fri Apr 7 16:19:03 2017 GabrieleOpticsDaily ProgressNew 1103P laser installedThis afternoon I installed the new Lumentum
(former JDSU) HeNe laser, model 1103P in
CR0.
  
  337   Fri Apr 7 14:12:52 2017 Eric, GabrieleGeneralGeneralS1600525 S1600526 S1600527 S16005282017-04-07


2:12pm in
chamber, pumps on

S1600525
in CR1
S1600526 in CR2
S1600527
  
  336   Thu Mar 30 15:23:44 2017 GabrieleOpticsGeneralSwapped HeNe laser in CR0The JDSU HeNe laser 1103P that I was using
is dead. I swapped it with a JDSU 1125P borrowed
from the 40m.
  
  335   Thu Mar 30 13:33:13 2017 GabrieleGeneralMeasurementsS16004772017-03-30


1:23pm,
in chamber CR2
1:25pm, roughing
pump started, clamps on
1:34pm
  
  334   Wed Mar 29 11:57:09 2017 GabrieleGeneralMeasurementsMIT sample2017-03-29


11:47am,
in chamber CR0, balanced
11:48am
roughing pump on
12:00pm, turbo
  
  333   Wed Mar 22 12:47:40 2017 GabrieleGeneralMeasurementsS1600469 S1600471 S1600481 S16004832017-03-22


12:38am,
in chamber

S1600469 in CR1
S1600471
in CR2
S1600481 in CR3
S1600483
  
  332   Sat Mar 11 17:33:45 2017 GabrieleGeneralMeasurementsS16004902017-03-10


4:38pm,
in chamber
4:40pm, roughing pump
on
4:59pm, turbo pump on


2017-03-22


12:10am
  
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