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 Author Type Category Subjectup Text Attachments
  9   Wed Mar 24 17:42:50 2021 PacoGeneralDesign specsSilicon TM dichroic coatings for phase IYeah, the magnitudes are the inverse weighted
scalar costs (so they lie on the appropriate
relative scale) and indeed larger enclosed
  
  3   Fri Jun 5 11:13:50 2020 RaymondGeneralHeat LoadSteady state heat load exampleAttached is a cartoon partial view into
the heat load experienced by the Mariner
assembly.
 Heat_Load_Sketch.pdf 
  73   Thu Aug 4 13:44:56 2022 Jennifer HritzGeneralOptical ContactingSuccess with slowly heatingYesterday, I did two rounds of slowly heating
4 samples to the maximum hot plate temperature.
This was to formally test if my success
 PXL_20220803_232203193.jpgPXL_20220804_002433906.jpg 
  34   Fri Oct 1 12:01:24 2021 PacoGeneralDesign specsTM Barrel coating emissivity[Paco, Nina, Aidan]

We ran our stack emissivity calculation
on different AR stacks to try and make a
 stack_1.pdfstack_2.pdfstack_3.pdfinterpolated_n_k.pdf 
  35   Fri Oct 1 13:24:40 2021 AidanGeneralDesign specsTM Barrel coating emissivityI have to question whether this passes
a sanity test. Surely in the case of Stack
2, the 10um thick Ta2O5 will absorb the majority
  
  36   Fri Oct 1 14:11:23 2021 PacoGeneralDesign specsTM Barrel coating emissivityAgree with this.
Quickly running tmm on the same "stacks"
gave the Attachment #1-3. (Ignore the
 stack_1.pdfstack_2.pdfstack_3.pdf 
  53   Thu Jun 16 14:04:30 2022 JuanGeneralSuspensionTable for Mariner Suspension CryoToday we looked at possible locations for
where we will be setting up Mariner Suspension
and Cryo chamber. The first option was the
  
  54   Thu Jun 16 19:43:36 2022 KojiGeneralSuspensionTable for Mariner Suspension Cryo- B246/QIL Skyhook


Find the base of Skyhook.
It should be in the storage room (B246).
  
  55   Thu Jun 23 21:11:03 2022 KojiGeneralSuspensionTable for Mariner Suspension CryoTable moving effort in the OMC lab: See
https://nodus.ligo.caltech.edu:8081/OMC_Lab/412

 
  
  16   Tue Jun 22 22:28:09 2021 KojiGeneralDesign specsTest Mass wedge designThe
ETM wedge of 0.5deg will allow us to separate
the AR reflections. We will be OK with the
 wedge.pdfLayout.pdfETM.pdfITM.pdf 
  103   Mon Oct 17 23:17:25 2022 Jennifer HritzGeneralOptical ContactingTesting PWM code with actual samplesNow that I have (relatively) good PWM code,
I wanted to do my first real test with actual
samples. Since everything went smoothly,
 first_real_PWM_test_samples_before_PXL_20221018_071840794.MP.jpgfirst_real_PWM_test_set_up_PXL_20221018_071943406.MP.jpgfirst_real_PWM_test_in_action_PXL_20221018_072832135.mp4 
  66   Thu Jul 14 14:55:01 2022 Jennifer HritzGeneralOptical ContactingTesting isopropanol and methanolNote that I am just testing out different
techniques, so I have not set up the thermocouples
to precisely measure the temperatue.
 PXL_20220714_220953206.MP_2.jpgPXL_20220714_220940258.MP_2.jpgPXL_20220714_222105409.jpgPXL_20220713_003923957.jpg 
  105   Wed Oct 19 21:51:10 2022 Jennifer HritzGeneralOptical ContactingThe trials and tribulations of the thermocouplesI intended to test the new thermocouple
set up today, but when I plugged them in,
both did not read a temperature. It took
 thermocouple_connector_test_ciruit_PXL_20221020_035719119.MP.jpgcorrect_assembly_PXL_20221020_042855181.MP.jpgresistance_through_broken_and_fixed_connector_PXL_20221020_035951538_20221020_041939698.MP.jpgbroken_and_fixed_thermocouple_PXL_20221020_042242792_20221020_042201775.MP.jpgthermocouples_and_thermometers_room_temp.zip 
  20   Fri Aug 6 04:34:43 2021 KojiGeneralGeneralTheoretical Cooling Time LimitI was thinking about how fast we can cool
the test mass. No matter how we improve the
emissivity of the test mass and the cryostat,
 cooling_curves.pdf 
  69   Fri Jul 22 13:47:47 2022 JuanGeneralGeneralUpdateJust a general update of what I have been
up to deriving Lagrange for double pendulum
system and also been looking at code that
  
  59   Thu Jul 7 10:23:04 2022 JuanGeneralGeneralUpdate Almost done with coil driver boards   IMG-5378.jpgIMG-5379.jpg 
  75   Mon Aug 15 16:37:51 2022 Juan GeneralGeneralUpdate on Sat Amp and OSEMsSat
Amp 

 IMG-6458.jpgIMG-6355.jpgIMG-6459.jpgIMG-6460.jpgOSEMdata.png 
  106   Thu Oct 20 22:43:05 2022 Jennifer HritzGeneralOptical ContactingWired the thermocouples backwardsSince the two devices are giving different
temperature readings, I would like to find
out if this imprecision is linear (e.g. they
 wrong_correct_polarization_PXL_20221022_054250498_20221022_055117337.MP.jpg 
  58   Tue Jul 5 21:06:47 2022 JuanGeneralGeneralWork Update Update of my current work I have finished
one coil driver board and started on the
last two that I need here is the progress
 IMG-5362.jpgIMG-5361.jpg 
  114   Thu Oct 27 22:12:21 2022 ranaGeneralOptical Contactingplotting and PIDThe Arduino / AC PWM interface looks good.
I recommend that you maintain the code in
GitHub and post a link to the repo whenever
  
  60   Thu Jul 7 15:20:04 2022 ranaGeneralOptical Contactingsome useful linksFor our optical contacting, Jennifer and
I are starting out with glass (microscope
slides), with the setup in the EE shop next
  
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