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  Coating Ring-down Measurement Lab elog, Page 3 of 18  Not logged in ELOG logo
ID Date Author Typedown Category Subject Text Attachments
  144   Mon Oct 24 10:26:30 2016 GabrieleGeneralMeasurementsS1600439S1600439, post annealing

Measurements
before annealing reported in elog 137.
 spectra.pngpeaks.pngringdowns.pngQs_errorbars.png 
  145   Mon Oct 24 14:33:46 2016 GabrieleGeneralMeasurementsEffect of annealing: Q increasesS1600439 has been measured as received
(before annealing, elog
137) and after annealing (elog
 annealed_Qs.png 
  146   Mon Oct 24 16:32:01 2016 GabrieleGeneralMeasurementsS1600448Sample S1600447, as received from
Mark Optics, second batch


in
chamber, pumping down at 4:30pm (2016-10-24)
pumps
 9x 
  147   Tue Oct 25 09:12:31 2016 GabrieleGeneralMeasurementsComparison of first and second batchThe plot below compares a sample from the
first batch and two samples from the second
batch. All samples are as received from Mark
 6x 
  148   Tue Oct 25 11:10:37 2016 GabrieleGeneralMeasurementsImage of S1600433This is an image of the sample S1600433
under the microscope, courtesy of GariLynn:

Link
 IMG_3150.JPG 
  149   Thu Oct 27 14:02:38 2016 AlenaGeneralGeneralAnnealingAnnealing run (447-448) on 3" wafers
- Crime 10/27/2016 https://dcc.ligo.org/T1600485-v1

 
  
  150   Fri Oct 28 21:20:48 2016 GabrieleGeneralMeasurementsS1600447 post annealingInstallation

I had some problems
in installing the wafer. I balanced it and
started the pump down a couple of times,
 6x 
  151   Sat Oct 29 10:12:39 2016 GabrieleGeneralMeasurementsS1600448 post annealing2016-10-29


venting
at 10:00am 10/29
sample installed,
pumping down started at 10:12am, turbo pump
 9x 
  152   Sat Oct 29 10:18:41 2016 GabrieleGeneralMeasurementsS1600447 before and after annealing

The plot above compares the measured
 Qs.png 
  153   Sun Oct 30 17:05:47 2016 GabrieleGeneralMeasurementsS1600448 before and after annealing

The plot above compares the measured
 Qs.png 
  154   Mon Oct 31 12:51:13 2016 GabrieleGeneralMeasurementsSimulation of dilution factor and measured loss anglesI made a COMSOL simulation of our wafer
(75 mm with flats, 1 mm thick) with a 1 micron
thick coating (Tantala), and computed the
 simulated_dilution_factors.png 
  155   Tue Nov 1 15:34:49 2016 Alena, CalumGeneral Annealing runAnnealing run (449-453) on 3" wafers
- Crime 11/01/2016 https://dcc.ligo.org/T1600507
  
  156   Fri Nov 4 08:11:57 2016 GabrieleGeneralMeasurementsS16004502016-11-04


8:08am in
chamber
8:38am pumping down
11:50am
QUIET 1162320651 (11:50:34) + 30s, EXCITATION
 spectra.pngpeaks.pngringdowns.pngringdowns.pngQs_errorbars.png 
  159   Fri Nov 4 14:56:35 2016 GabrieleGeneralMeasurementsS16004512016-11-04


2:45pm:
re-aligned optical setup to horizontal reference
2:55pm:
installed in chamber, balanced
2:56pm,
 13x 
  160   Fri Nov 4 16:16:23 2016 AlenaGeneralGeneralAnnealing runAnnealing run (454-459) on 3" wafers
- Crime 11/02/2016 https://dcc.ligo.org/LIGO-T1600510

Annealing
run (460-465) on 3" wafers - Crime 11/04/2016
  
  161   Sat Nov 5 10:49:17 2016 GabrieleGeneralMeasurementsS16004522015-11-05


10:45am
in chamber and balanced
10:48am
roughing pump on
10:56am turbo
 10x 
  162   Sat Nov 5 17:40:35 2016 GabrieleGeneralMeasurementsS16004532015-11-05


5:39pm in
chamber, balanced
5:40pm roughing
pump on
5:50pm turbo on
7:55pm:
 spectra.pngpeaks.pngringdowns.pngQs_errorbars.png 
  163   Sun Nov 6 10:14:51 2016 GabrieleGeneralMeasurementsS16004562016-11-06


10:12am:
installed in chamber, balanced
10:14am:
roughing pump on
10:22am: turbo
 12x 
  164   Mon Nov 7 10:39:08 2016 GabrieleGeneralMeasurementsS16004572016-11-07


10:30am,
re-aligned optical system to horizontal reference
10:37am,
in chamber balanced
10:38am, started
 8x 
  165   Mon Nov 7 11:27:16 2016 GabrieleGeneralVacuumTurbo pump excites some resonance at 58 HzI looked into a couple of turbo pump switch
on periods, and in both cases when the pump
speed hits 58 Hz, a resonance is excited.
  
  166   Mon Nov 7 16:59:10 2016 GabrieleGeneralMeasurementsS16004582016-11-07


4:46pm installed
and balanced
4:47pm, roughing
pump started
4:59pm turbo pump
 8x 
  167   Tue Nov 8 11:39:20 2016 GabrieleGeneralMeasurementsS16004592016-11-08


11:23, in
chamber, balanced
11:25 roughing
pump on
11:38 turbo pump on
1:38pm
 8x 
  168   Tue Nov 8 17:09:20 2016 GabrieleGeneralMeasurementsS16004602016-11-08


5:08pm,
in chamber, balanced
5:09pm, roughing
pump on
5:18pm, turbo pump on
7:56:
 8x 
  169   Wed Nov 9 09:56:50 2016 GabrieleGeneralMeasurementsS16004612016-11-09


9:45am in
chamber, balanced
9:46am roughing
pump on
9:57am turbo pump on
1:02pm:
 9x 
  170   Wed Nov 9 15:32:11 2016 GabrieleGeneralNoise huntingNoise below 2 kHz is not due to the roughing pump, but to the clean air filtersThe two spectra below show basically no
difference (blue roughing pump on, red, roughing
pump off)
 Screenshot-1.pngScreenshot.png 
  171   Wed Nov 9 16:25:21 2016 GabrieleGeneralMeasurementsS16004632016-11-09


4:24pm,
in chamber, balanced
4:25pm, roughing
pump on
4:37, turbo pump on
6:44pm:
 8x 
  172   Thu Nov 10 10:03:17 2016 GabrieleGeneralMeasurementsS16004652016-11-10


10:01am,
in chamber, balanced
10:03am,
roughing pump on
10:23am, turbo
 10x 
  174   Thu Nov 10 16:07:13 2016 Alena, CalumGeneralGeneralAnnealing runAnnealing run (466-471) on 3" wafers
- Crime 11/10/2016

https://dcc.ligo.org/LIGO-T1600524
  
  175   Thu Nov 10 16:13:46 2016 GabrieleGeneralMeasurementsS1600450 againNoticed a small chip on the side, marked
as damaged

2016-11-10


4:00pm,
optical setup realigned to horizontal reference
4:12pm,
 8x 
  176   Thu Nov 10 17:04:05 2016 GabrieleGeneralNoise huntingTemporary second QPDThis morning I installed temporarily a
second QPD to monitor the input beam. The
goal was to understand where the vibrations
 2016-11-10_10.56.06.jpgspectra.pngcoherence_x.png 
  177   Fri Nov 11 10:29:57 2016 GabrieleGeneralMeasurementsS1600454Note: Marked at "damaged?" by
Alena

2016-11-11


10:28am,
in chamber, balanced
10:29am,
 9x 
  178   Fri Nov 11 16:38:23 2016 GabrieleGeneralMeasurementsS16004662016-11-11


4:36pm,
in chamber, balanced
4:38pm roughing
pump on
4:48pm turbo pump on
7:30pm
 spectra.pngpeaks.pngringdowns.pngQs_errorbars.png 
  179   Sat Nov 12 09:39:46 2016 GabrieleGeneralMeasurementsS16004682016-11-12


9:39am,
in chamber, balanced
9:39am, roughing
pump on
9:52, turbo pump on
12:14pm,
 8x 
  180   Sat Nov 12 09:49:07 2016 GabrieleGeneralMeasurements12 substrates ready for MontrealThe 12 following substrates have been measured
and are ready for the first coating experiment
in Montreal:
 2016-11-12_09.45.42.jpg 
  181   Sun Nov 13 10:11:19 2016 GabrieleGeneralNoise huntingNoise due to airThe plot below compares the QPD signal
spectra in different configurations (roughing
pump on/off, air on/off).
 air_noise.pngair_zoom.png 
  182   Sun Nov 13 10:40:16 2016 GabrieleGeneralMeasurementsS16004692016-11-13


10:39am
in chamber, balanced
10:40am,
roughing pump on
10:49am, turbo
 8x 
  183   Sun Nov 13 19:12:56 2016 GabrieleGeneralMeasurementsS16004712016-11-13

Note: some
scratches or contamination visible on the
surface near the egde
 13x 
  184   Mon Nov 14 08:54:49 2016 Alena, CalumGeneralGeneralAnnealing runAnnealing run (472-477) on 3" wafers
- Crime 11/11/2016 https://dcc.ligo.org/T1600527
  
  185   Mon Nov 14 11:13:33 2016 GabrieleGeneralMeasurementsS16004672016-11-14

Note: marked
as "bad edge" by Alena


11:00 in chamber, balanced
11:01
 spectra.pngpeaks.pngringdowns.pngQs_errorbars.png 
  186   Mon Nov 14 11:28:33 2016 GabrieleGeneralVacuumViton padsI added three 1"x1" viton pads
below the base plate, and realigned the entire
optical system to the horizontal reference
 2016-11-14_10.41.47.jpg2016-11-14_10.41.57.jpgviton.png 
  187   Mon Nov 14 14:41:08 2016 GabrieleGeneralMeasurementsS16004742016-11-14


2:40pm,
in chamber, balanced
2:41pm, roughing
pump on
2:50pm, turbo pump on
4:12pm,
 17x 
  188   Tue Nov 15 10:08:28 2016 GabrieleGeneralMeasurementsS16004752016-11-15


10:01am
in chamber, balanced
10:03am,
roughing pump on
10:21am turbo
 8x 
  190   Tue Nov 15 16:46:48 2016 GabrieleGeneralMeasurementsS16004762016-11-15


4:45pm in
chamber, balanced
4:46pm, roughing
pump on
4:56pm, turbo pump on

Excitations:
 14x 
  191   Wed Nov 16 09:35:59 2016 GabrieleGeneralMeasurementsS16004772016-11-16


9:34am in
chamber, balanced
9:35am, roughing
pump on
9:46am, turbo pump on
Excitations:


Quiet
 8x 
  192   Wed Nov 16 09:43:25 2016 Gabriele, AlastairGeneralDaily ProgressCO2 laser polishing setupYesterday we assembled the lase polishing
system. The Co2 laser power can be controlled
using a waveplate, so we can turn on the
 2016-11-15_16.20.23.jpg2016-11-15_16.35.14.jpg2016-11-15_16.35.14.jpg 
  193   Wed Nov 16 15:57:21 2016 GabrieleGeneralMeasurementsS16004812016-11-16


3:56pm,
in chamber, balanced
3:57pm, roughing
pump on
4:07pm, turbo pump on
Excitations:


Quiet
 12x 
  194   Thu Nov 17 09:35:51 2016 GabrieleGeneralMeasurementsS16004832016-11-17


9:24am in
chamber, balanced
9:35am roughing
pump on
9:46am, turbo pump on
Excitations


Quiet
 8x 
  195   Thu Nov 17 12:06:39 2016 GabrieleGeneralVacuumSwitching on the IGM moves the diskHere's a trend of the QPD signals when
the IGM was turned on:

 igm_on.png 
  196   Thu Nov 17 12:08:28 2016 GabrieleGeneralGeneralRemote control of air filters and roughing pumpI installed a network controlled power
strip. The two air filters and the roughing
pump are connected to this power strip and
 Screenshot-Untitled_Window.png 
  197   Thu Nov 17 17:54:13 2016 GabrieleGeneralMeasurementsS1600439 after CO2 laser polishingPrevious measurments


post
annealing 144
pre
annealing 137


2016-11-17


5:52pm,
 8x 
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