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ID Date Author Type Categoryup Subject Text Attachments
  12738   Thu Jan 19 10:21:54 2017 AshleyUpdateGeneralPreliminary Microphone DataBrief Summary:
I am currently looking at the acoustic
noise around both arms to see if there are
 xend_psd.pngxblrms.pngIMG_3734.JPG 
  12788   Thu Feb 2 12:17:48 2017 SteveUpdateGeneral USB microscopeThis
AmScope microscope would have 3.5x-180x
magnification, calibratable measurement function,
  
  12808   Tue Feb 7 16:23:49 2017 SteveUpdateGeneralpower interruption tomorrow                                                                                                                                  
received this note: at 4:11pm Tuesday, Feb
7, 2017
  
  12813   Thu Feb 9 08:03:08 2017 SteveUpdateGeneral USB microscope orderedhttp://www.amscope.com/3-5x-180x-boom-stand-trinocular-zoom-stereo-microscope-with-144-led-ring-light-and-10mp-camera.html
will be ordered today.
  
  12814   Thu Feb 9 11:22:56 2017 gautamUpdateGeneralSorensens and DIN connections at 1X1I'd like to fix a few things at 1X1
when we plug in the new amplifier for the
29.5MHz modulation signal. 
 Screen_Shot_2017-02-10_at_9.01.46_AM.png 
  12826   Mon Feb 13 17:39:45 2017 AshleyUpdateGeneralPreliminary Microphone Data Update
Problems that have occurred since
my last post: All of the sudden, I was getting
very strange data that was very quiet and
 figure_1.pngx_and_y_blrms_03.pngxblrms_median.png 
  12834   Thu Feb 16 13:29:38 2017 gautamSummaryGeneralAlternative Calibration SchemeSummary:

Craig and I have been trying to
put together a Simulink diagram of the proposed
 AltCal.pdf 
  12835   Thu Feb 16 21:55:47 2017 ranaSummaryGeneralAlternative Calibration SchemeQuestion for Craig: What does the SNR of
our lines have to be? IF we're only trying
to calibrate the actuator in the audio band
  
  12837   Fri Feb 17 20:04:43 2017 KojiUpdateGeneralProjector not functional / Zita partially workingKoji, Gautam, Johannes

We quickly checked the situation
of the projector in the control room.
  
  12842   Tue Feb 21 13:51:35 2017 CraigSummaryGeneralAlternative Calibration SchemeWe get SNR in two ways: the amplitude of
applied force and the integration time. 
So we are limited in two ways: stability
  
  12843   Tue Feb 21 17:05:14 2017 SteveUpdateGeneralProjector lamp replacedThis bulb was
blown out on Feb 4, 2017 after 2 months
of operation.
 blownup.jpg 
  12845   Wed Feb 22 10:16:54 2017 ranaSummaryGeneralAlternative Calibration SchemeOK, but the questions still stands: "   
  12848   Thu Feb 23 14:50:26 2017 SteveUpdateGeneral USB microscope returnedThe microscope shipped back to the vendor
for credit yesterday.

  
  12871   Mon Mar 6 16:32:36 2017 SteveUpdateGeneralold NPRO 16 years old Lightwave NPRO M126-1064-700,
sn 415 power output is tripping continously
to zero.
  
  12872   Tue Mar 7 15:17:19 2017 SteveBureaucracyGeneralproperty tagProperty tag found.  property_tag.jpg 
  12875   Thu Mar 9 15:25:12 2017 KojiUpdateGeneralIMC/XYarms aligned/lockedAs per Steve's request, I've checked
the alignment of the IMC and the arms. These
three cavities are locked and aligned.
  
  12876   Thu Mar 9 17:26:43 2017 SteveUpdateGeneralattempted ETMY picture takingI removed the video monitoring can and
replaced it with Olympus SP-570UZ camera.
It has no IR blocker. The OSEM light are
  
  12877   Thu Mar 9 20:11:04 2017 KojiUpdateGeneralattempted ETMY picture takingThe attached is the ETMY image with the
single arm locked. This was the best I could
do. Here is the recipe
 P3090032.JPG 
  12881   Fri Mar 10 18:00:22 2017 SteveUpdateGeneralattempted ETMY picture takingYour technique works Koji  P3100044.JPGP3090024.JPG 
  12929   Wed Apr 5 16:05:47 2017 gautamUpdateGeneralNB code checkout[evan, gautam]

We spent some time trying to get
the noise-budgeting code running today. I
  
  12948   Wed Apr 19 15:46:24 2017 gautamUpdateGeneral1611/1811 inventory checkI looked through the lab area to do a fast
photodiode inventory check, as we may need
to buy some for the higher order mode spectroscopy
  
  12950   Tue Apr 25 19:35:41 2017 gautamUpdateGeneralIPCS -qDataviewer wouldn't launch on pianosa
- it seemed to work fine on Donatella though.
Rana suggested using the ipcs -q command.
  
  12951   Wed Apr 26 01:00:23 2017 gautamUpdateGeneralDRMI locking Since we'd like to get back to DRSE
locking, I tried locking the DRMI tonight.
I did the following:
 DRMI_1f_26April2017.pngIMG_7373.JPGIMG_7372.JPG 
  12954   Fri Apr 28 02:04:36 2017 gautamUpdateGeneralDRMI locking I got a couple of ~30min long DRMI lock
stretches today. The settings I used are
essentially the same as what I had back in
 20170428_DRMI.pdf 
  12955   Fri Apr 28 13:56:26 2017 ranaUpdateGeneralDRMI locking one of these signals does not look like
the others: explanation?
  
  12957   Fri Apr 28 19:32:06 2017 gautamUpdateGeneralDRMI locking - PRCL angular FFI took a closer look at the POP QPD/ PRC
angular feedforward situation yesterday.
I thought it would be useful to have a 
 PRC_angularFF.pdfPRC_TFs.pdf 
  12960   Mon May 1 16:29:51 2017 gautamUpdateGeneralDRMI locking For the traces I posted, I had not turned
on the whitening for the SRCL sensing PD
(REFL55). However, I took a spectrum on a
 LSC_sensingNoise.pdfIMG_7378.JPG 
  12962   Mon May 1 21:45:54 2017 ericqUpdateGeneralDRMI locking Comparing counts doesn't get you anywhere;
each PD has different whitening gain which
may vary from measurement to measurement.
  
  12963   Wed May 3 16:00:00 2017 gautamSummaryGeneralNetwork Topology Check[johannes, gautam]

I forgot we had done this last
year already, but we updated the control
 Network_topology_3May2017.pdf 
  12964   Wed May 3 16:02:36 2017 SteveUpdateGeneralPI pzt inventory checkOne is broken, two are ready to steer green
and 3 available in un known condition

 
 IMG_3678.JPGPIpztETMYgreen.jpg 
  12967   Wed May 3 16:47:45 2017 KojiUpdateGeneralPI pzt inventory checkI also have a functional one on my desk,
which has one of the wires repaired.

  
  12969   Wed May 3 18:45:45 2017 ranaUpdateGeneralDRMI locking [quote]Comparing counts doesn't get you anywhere;
each PD has different whitening gain which
may vary from measurement to measurement.
  
  12972   Thu May 4 19:03:15 2017 gautamUpdateGeneralDRMI locking - preliminary MICH NBSummary:

 DRMI_noArms_April30.pdfMICH_OLTF.pdfC1NB_disp_40m_MICH_NB_30_April_2017.pdf40m_REFL_RFPDs_efficiency.pdf 
  12974   Fri May 5 10:13:02 2017 ericqUpdateGeneralMICH NB questionsIs suspension thermal noise missing? I take
it "Thermal" refers just to thermal things
going on in the optic, since I don't see
  
  12975   Fri May 5 12:10:53 2017 gautamUpdateGeneralMICH NB questions[quote]Is suspension thermal noise missing?
I take it "Thermal" refers just
to thermal things going on in the optic,
 C1NB_disp_40m_MICH_NB_30_April_2017.pdf 
  12976   Sat May 6 21:52:11 2017 ranaUpdateGeneralMICH NB questionsI think the most important next two items
to budget are the optical lever noise, and
the coil driver noise. The coil driver noise
  
  12979   Wed May 10 01:56:06 2017 gautamUpdateGeneralMICH NB - OL couplingLast night, I tried to estimate the contribution
of OL feedback signal to the MICH length
error signal.

In order to do so,
 OL_BS_ITM_comp.pdfC1NB_disp_40m_MICH_NB_8_May_2017.pdfC1NB_disp_40m_MICH_NB_10_May_2017.pdf 
  12981   Wed May 10 16:53:38 2017 ranaUpdateGeneralMICH NB - OL couplingThat's a good find.


The OL control signal can
be gotten from the DQ error signal. You just
  
  12983   Wed May 10 17:17:05 2017 gautamUpdateGeneralDAC / Coil Driver noiseSuspension
Actuator noise:

There
are 3 main sources of electronics noise which
 actuation.jpg 
  12984   Wed May 10 17:46:44 2017 gautamUpdateGeneralDAC / Coil Driver noise - SRM coil driver + dewhite board removedI've
removed the SOS coil driver (D010001-B,
  
  12985   Thu May 11 09:45:46 2017 ranaUpdateGeneralDAC / Coil Driver noise - SRM coil driver + dewhite board removedI believe the ETMs and ITMs are different
from the others.
  
  12986   Thu May 11 18:59:22 2017 gautamUpdateGeneralSRM coil driver + dewhite board initial surveyI've added marked-up schematics + high-res
photographs of the SRM coil driver board
and dewhitening board to the 40m DCC Document
 D010001-B_40m.pdfD000183-C8_40m.pdf 
  12987   Fri May 12 01:36:04 2017 gautamUpdateGeneralSRM coil driver + dewhite board LISO modelingI've
made the LISO models for the dewhitening
board and coil driver boards I pulled out.
 SRM_bypass_plus_CoilDriver.pdfliso.zip 
  12988   Fri May 12 12:34:55 2017 gautamUpdateGeneralITM and BS coil driver + dewhite board pulled outI first set the bias sliders to 0 on the
MEDM screen (after checking that the nominal
values were stored), then shut down the watchdogs,
  
  12990   Fri May 12 18:50:08 2017 gautamUpdateGeneralITM and BS coil driver + dewhite board pulled outI've uploaded high-res photos + marked
up schematics to the same DCC page linked
in the previous page. I've noted the
  
  12999   Fri May 19 19:18:53 2017 KaustubhSummaryGeneralTesting of the new Photo Detectors ET-3010 and ET-3040Motivation:

I got some hands-on-experience
on using RF photodetectors and the Network
 IMG_20170519_173247922.jpgIMG_20170519_173253252.jpgIMG_20170519_173300174.jpgPD_test_setup.png 
  13003   Mon May 22 13:37:01 2017 gautamUpdateGeneralDAC noise estimateSummary:

I've
 DAC_noise_model.pdfC1NB_disp_40m_MICH_NB_22_May_2017.pdf 
  13005   Mon May 22 18:20:27 2017 KaustubhSummaryGeneralTesting of the new Photo Detectors ET-3010 and ET-3040I am adding the text files with the data
readings and paramater settings along
with the Bode Plot of the data. I plotted
 ET-3040_test.zipET-3040_test.pdf 
  13009   Tue May 23 18:09:18 2017 KaustubhConfigurationGeneralTesting ET-3010 PDIn continuation with the previous(ET-3040
PD) test.

The ET-3010 PD requires to be fiber
  
  13010   Tue May 23 22:58:23 2017 gautamUpdateGeneralDe-Whitening board noisesSummary:

I
 ITMX_deWhite_ch1_noise.pdf 
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