40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  Mariner elog, Page 1 of 2  Not logged in ELOG logo
New entries since:Wed Dec 31 16:00:00 1969
IDdown Date Author Type Category Subject Text Attachments
  89   Mon Oct 3 23:32:30 2022 Jennifer HritzGeneralOptical ContactingCause of improved bond: time or pressure (Update)I was unable to check the samples because
I could not get access to Bridge, so they
will be checked tomorrow and the results
  
  88   Sun Oct 2 23:23:07 2022 Jennifer HritzGeneralOptical ContactingCause of improved bond: time or pressureBefore jumping to conclusions based on
my previous results, I wanted to check that
it was indeed heat and pressure, not time,
 before_time_on_left_pressure_on_right_PXL_20221003_061828860.MP.jpgset_up_time_vs_pressure_PXL_20221003_062018249.MP.jpgin_progress_time_vs_pressure_PXL_20221003_062117715.MP.jpg 
  87   Sat Oct 1 23:00:03 2022 Jennifer HritzGeneralOptical Contacting(RESULTS!) Quick test heat and pressure testThese are the results from the previous
log.
 samples_before_AND_after_pressure_PXL_20221002_054158446.MP.jpgsamples_before_AND_after_heat_w_pressure_PXL_20221002_053842185.MP.jpg 
  86   Fri Sep 30 21:51:31 2022 Jennifer HritzGeneralOptical ContactingQuick test heat and pressure testGiven that these glass slides are much
thinner than the ones I worked with prior,
I suspected they would be more receptive
 pressure_set_up_PXL_20221001_040539385.MP.jpgsamples_before_pressure_PXL_20221001_040441662.MP.jpgheat_w_pressure_set_up_PXL_20221001_033228622.MP.jpgsamples_before_heat_w_pressure_PXL_20221001_034620991.MP.jpg 
  84   Thu Sep 29 18:36:40 2022 Jennifer HritzGeneralOptical ContactingLooked at Thor Lab slides (continued)Continuining with my casual exploration
of the Thor Lab slides, I heated them from
off --> low --> med --> high, with
 before_heat_PXL_20220930_011031420.MP.jpgset_up_PXL_20220930_011050114.MP.jpgright_after_heating_PXL_20220930_014301900.MP.jpgafter_4ish_hours_of_cooling_PXL_20220930_063533904.jpg 
  83   Wed Sep 28 22:11:31 2022 Jennifer HritzGeneralOptical ContactingLooked at Thor Lab slidesWhile finalizing my work plan for the quarter,
I decided to look at the Thor Lab slides.
This was instructive because they highlighted
 thor_lab_slides_first_bond_PXL_20220929_045352675.MP.jpgthor_lab_slides_after_attempting_to_expand_bond_area_PXL_20220929_045510075.MP.jpg 
  82   Tue Sep 27 22:29:34 2022 Jennifer HritzGeneralOptical ContactingRazor test apparatus disassembly picturesPictures of the razor test apparatus before
and after disassembly, to make future reassembly
easier.
 razor_before_PXL_20220817_211123631.MP.jpgrazor_after_PXL_20220911_062818511.MP.jpg 
  81   Wed Sep 7 10:42:12 2022 RadhikaGeneralHeat LoadMariner TM Cooldown modelThe attached plot (upper) compares the
heat load delivered to the test mass from
various snout lengths (end to end), as a
 SnoutLengthCooldownTM.pdf 
  80   Mon Aug 29 15:44:46 2022 RadhikaGeneralHeat LoadMariner TM Cooldown modelHere is a more detailed analysis of varying
the length and radius of the snout.

Attachment 1 plots the heat load
 VaryingSnoutparams.pdfMarinerTMCooldown_snout_optimal.pdf 
  79   Fri Aug 26 14:24:57 2022 RadhikaGeneralHeat LoadMariner TM Cooldown modelHere I describe the current radiative cooldown
model for a Mariner test mass, using parameters
from the most recent CAD model. A diagram
 6x 
  78   Tue Aug 23 17:10:50 2022 PacoGeneralDesign specsNew corner plotsInstead of varying individual layer thicknesses
using the MC sampler, I made sure both the
thickness and index of refractions are varied
 ITM_corner.pdfETM_corner.pdf 
  77   Tue Aug 16 19:54:29 2022 Jennifer HritzGeneralOptical ContactingRazor blade testWe succeeded in setting up an apparatus
for quantifiying the razor blade test. After
mounting the glass slides such that
 PXL_20220817_023737796.MP.jpgPXL_20220817_023741865.MP.jpg 
  76   Tue Aug 16 09:58:23 2022 PacoGeneralDesign specsHR coating updateA couple of coating stacks with better
tolerance (transmission +- 10%). Attachments
#1-2 show the spectral reflectivities
 6x 
  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 
  74   Mon Aug 8 13:00:56 2022 JuanGeneralGeneralSat Amp testing of OSEMSIn the following test, a single Sat Amp
chassis that holds Sat Amp Board S1106078
and S1106077
 OSEMs.xlsx 
  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 
  72   Thu Aug 4 11:26:55 2022 JuanGeneralGeneralSat AmpSat amp seems to be working just fine.
There does seem to be a saturation issue
with one of the outputs we may need to change
 IMG-6153.jpg 
  71   Wed Jul 27 14:50:20 2022 Jennifer HritzGeneralOptical ContactingBonding without liquids and narrowing down heating issueI have found that, after cleaning the glass
with methanol (or even sometimes with just a dry
lense-cleaning cloth), I can get glass slides to
 PXL_20220727_214658230.jpgPXL_20220727_214241668.mp4 
  70   Tue Jul 26 14:17:44 2022 JuanGeneralGeneralOSEMS actuators we have 23 OSEMS they look all full built
and I will try and test them this week and
or next week.
 8x 
  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
  
  68   Fri Jul 22 13:36:55 2022 PacoGeneralDesign specsHR coating updateHere are some corner plots to analyze the
sensitivity of the designs in the previous
elog to a 1% gaussian
 ETM_corner.pdfITM_corner.pdf 
  67   Mon Jul 18 18:34:29 2022 PacoGeneralDesign specsHR coating updateI've been running the HR coating optimization
for mariner TMs. Relative to the specifications
found here
 ETM_R.pdfITM_R.pdfETM_Layers.pdfITM_Layers.pdf 
  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 
  65   Wed Jul 13 13:16:33 2022 JuanGeneralGeneralFinished coil driver and sat amp I have finished all coil driver and sat
amp chassis they all seem to be functioning
properly.
 IMG-5553.jpg 
  64   Mon Jul 11 17:39:17 2022 JuanGeneralGeneralCoil driver chassis Finished all 3 Coil Drover chassis
and power lines still need to install the
rear cables will do that after I finish Sat
 IMG-5493.jpgIMG-5494.jpg 
  63   Mon Jul 11 17:27:39 2022 Jennifer HritzGeneralOptical ContactingFirst successful bondNote that the slides have "GLOBE"
printed on one side. I always bond the opposite
using the opposite side without the text.
 PXL_20220712_223449788.MP.jpg 
  62   Mon Jul 11 16:24:31 2022 Jennifer HritzGeneralOptical ContactingBaselining the temperature output of the Oster hot plateThis was performed last Friday (7/8).

I secured a thermocouple perpendicular
against the hotplate and recorded the
 PXL_20220708_230038748.jpgPXL_20220708_230234841.MP.jpg 
  61   Fri Jul 8 17:09:10 2022 JuanGeneralGeneralCoil Driver and Sat AmpAll three coil driver boards are complete
and have been tested. Modification for all
4 sat amp have been completed. Ideally, I
 IMG-5434.jpgIMG-5421.jpgIMG-5420.jpg 
  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
  
  59   Thu Jul 7 10:23:04 2022 JuanGeneralGeneralUpdate Almost done with coil driver boards   IMG-5378.jpgIMG-5379.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 
  57   Sat Jul 2 09:22:39 2022 Juan GeneralGeneralProgress update I've completed one coil driver board. 
Hopefully next week I can finish the
other 2 boards and make the modifications
 IMG-5220.jpg 
  56   Mon Jun 27 08:22:22 2022 JuanGeneralGeneralGeneral Update/ Need to do taskI've managed to cut and crimp wires
for the power board for coil driver. I will
begin adding components to the coil driver
 coildrive.jpg 
  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

 
  
  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).
  
  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
  
  52   Tue May 10 18:29:11 2022 ranaGeneralSuspensionMariner Suspension Cryo shield Install / Removal steps    
  51   Thu May 5 19:56:25 2022 KojiGeneralSuspensionMariner Suspension Cryo shield Install / Removal stepsDoes this work? Is this insane?  40m_Mariner_Suspension-0062.png40m_Mariner_Suspension.mp4 
  50   Wed Dec 15 06:43:43 2021 Jiri SmetanaGeneralGeneralLagrangian Model - Translation & PitchI've checked the validity of my state
space model in a couple of ways so that we
have confidence in the results that it gives.
  
  49   Wed Nov 17 09:27:04 2021 Jiri SmetanaGeneralGeneralLagrangian Model - Translation & PitchI've been having a look at the transfer
functions for the translation and pitch of
both masses. I'm attaching the plot of
 plant_all_tfs.png 
  48   Tue Nov 16 11:47:54 2021 PacoGeneralDesign specsEstimate of in-air absorption near 2.05 um[Paco]

There was an error in the last
plot of the previous log. This was correctly
 PP_broadened_spectrum.pdf 
  47   Fri Nov 5 11:51:50 2021 PacoGeneralDesign specsEstimate of in-air absorption near 2.05 um[Paco]

I used the HITRAN database to download
the set of ro-vibrational absorption lines
 HITRAN_line_strenghts.pdfbroadened_spectrum.pdfPP_broadened_spectrum.pdf 
  46   Thu Nov 4 00:42:05 2021 KojiGeneralSuspensionMariner Sus DesignSome more progress:

- Shaved the height of the top
clamp blocks. We can extend the suspension
 Screen_Shot_2021-11-04_at_12.38.46_AM.pngScreen_Shot_2021-11-04_at_12.39.53_AM.png 
  45   Wed Nov 3 02:52:49 2021 KojiGeneralSuspensionMariner Sus DesignAll parameters are temporary:

Test mass size: D150mm x L140mm
Intermediate mass size W152.4mm x
  
  44   Tue Oct 26 08:09:08 2021 Jiri SmetanaGeneralGeneralLagrangian Suspension Model - Extended BodyI've been testing out the extended
body lagrangian models and I'm trying
to understand the ground motion and force
 comparison_xg.pngcomarison_F.png 
  43   Fri Oct 15 14:31:15 2021 RadhikaGeneralHeat LoadMariner cooldown model status + next stepsI reran the cooldown model, setting the
emissivity of the inner surface of the inner
shield to 0.7 (coating), and the emissivity
 VaryingISA.pdfVaryingTMl.pdf 
  42   Fri Oct 15 13:45:55 2021 RadhikaGeneralHeat LoadMariner cooldown model status + next stepsI used the same model in [37]
to consider how test mass length affects
the cooldown. Attachment 1 plots the curves
 VaryingTMl.pdf 
  41   Thu Oct 14 04:17:36 2021 Jiri SmetanaGeneralGeneralDamping Loop (Point-Mass Pendulums)Here are the DAC and residual displacement
spectra for different suspension heights
ranging from 450 mm to 600 mm. I aimed to
 8x 
  40   Tue Oct 12 12:49:42 2021 Jiri SmetanaGeneralGeneralDamping Loop (Point-Mass Pendulums)Now that I have correct phase and amplitude
behaviour for my MIMO state space model of
the suspension and the system is being correctly
 servo.pngopen_loop.pngclosed_loop.pngnoise.pnglength_change.png 
  39   Tue Oct 12 12:44:44 2021 Jiri SmetanaGeneralGeneralNew Damping Loop ModelI've ironed out the issues with my
MATLAB model so that it now shows correct
phase behaviour. The problem seems to arise
  
ELOG V3.1.3-