40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  Mariner elog, Page 2 of 2  Not logged in ELOG logo
New entries since:Wed Dec 31 16:00:00 1969
ID Date Author Type Category Subjectdown Text Attachments
  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 
  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.
  
  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 
  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 
  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 
  15   Fri Jun 4 11:09:27 2021 PacoGeneralDesign specsHR coating tolerance analysisThe HR coating specifications are:


ETM
  
  28   Sun Sep 19 18:52:58 2021 PacoGeneralDesign specsHR coating emissivity[Paco, Nina]

We have been working on an estimate
of the wavelength dependent emissivity for
 ETM_210409_120913_emissivity.pdfinterpolated_TF_k.pdf 
  33   Fri Oct 1 11:52:06 2021 PacoGeneralDesign specsHR coating emissivity[Paco, Nina, Aidan]

Updated the stack emissivity code
to use the Kitamura paper fused silica dispersion
 ETM_210409_120913_emissivity.pdfinterpolated_n_k.pdf 
  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 
  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 
  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 
  5   Fri Mar 5 11:05:13 2021 StephenGeneralDesign specsFeasibility of 6" optic size in CAD6" vs 4" optic size comparison
using CAD - worth hopping into the 3D geometry
using the link below, but also posting a
 4in_from_20210305_easm.png6in_from_20210305_easm.png 
  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 
  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 
  10   Fri Apr 2 19:59:53 2021 PacoGeneralDesign specsDifferential evolution strategiesDifferential evolution strategies 'benchmarking'
for thin film optimization

Since
I have been running the ETM/ITM coatings
 diffevostrategies.pdf 
  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 
  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 
  19   Tue Jul 27 11:38:25 2021 PacoGeneralDesign specsDOPO single pass PDC efficiencyHere is a set of curves describing the
single-pass downconversion efficiency in
the 20 mm long PPKTP crystals for the DOPO.
 singlepass_eff_overest.pdf 
  21   Tue Aug 17 17:48:57 2021 KojiGeneralEquipmentCrackle SW modelAs a kickoff of the mariner sus cryostat
design, I made a tentative crackle chamber
model in SW.
 Screen_Shot_2021-08-17_at_17.44.32.png 
  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 
  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 
  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 
  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 
  14   Fri May 7 17:50:31 2021 Nina Vaidya & Shruti MaliakalGeneralDesign specsArm Cavity Design 2021 updateHere are the final slides with all the
results on the Arm Cavity Design, please
review. 
 Arm_Cavity_Design_05072021_with_tolerances.pptxHOMhelper.pyArm_HOManalysis.ipynbHOMplot.py 
  12   Tue Apr 27 12:28:43 2021 Nina Vaidya & Shruti MaliakalGeneralDesign specsArm Cavity Design 2021Rana’s code: R_c = 57.3

-->New code with optimization:
sweeping through a range of R_c, using a
 Arm_Cavity_Design_04232021.pptxArm_HOM_optimization.ipynb 
  26   Wed Sep 15 09:15:21 2021 Jiri SmetanaGeneralGeneralActuation Feedback Model and NoiseI've implemented a more extensive feedback
model that uses proper conversions between
metres, volts, counts etc. and includes all
 displacement_asd.pngservo.pngsystem_loop.mground_freq.txtground_xx.txt 
  27   Thu Sep 16 10:02:47 2021 Jiri SmetanaGeneralGeneralActuation Feedback Model and NoiseHere's the DAC voltage spectrum with
its associated RMS.

Also, for clarity, this model is
 DAC_voltage.png 
  29   Fri Sep 24 11:02:41 2021 KojiGeneralGeneralActuation Feedback Model and NoiseWe had a meeting with the code open in
ZOOM. Here are some points we discussed:


The code requires another
 ground.m 
  22   Tue Aug 24 08:15:37 2021 Jiri SmetanaGeneralGeneralActuation Feedback ModelI'm posting a summary of the work I've
done on the Lagrangian analysis of the Mariner
suspension design and a state space model
 actuator_feedback_diagram.pngbode_servo.pngbode_plant.png 
  11   Fri Apr 23 10:41:22 2021 AidanGeneralDesign specs2 um photodiode requirementsMCT HgCdTe requirements: https://docs.google.com/spreadsheets/d/1lajp17yusbkacHEMSobChKepiqKYesHWIJ6L7fgr-yY/edit?usp=sharing

 
  
  17   Wed Jun 30 16:21:53 2021 StephenGeneralDesign specs [Stephen, Koji]

WIP - check layout of 60 cm suspension
in chamber at 40m, will report here
  
ELOG V3.1.3-