ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
73
|
Thu Aug 4 13:44:56 2022 |
Jennifer Hritz | General | Optical Contacting | Success with slowly heating | Yesterday, I did two rounds of slowly heating
4 samples to the maximum hot plate temperature.
This was to formally test if my success |
|
|
72
|
Thu Aug 4 11:26:55 2022 |
Juan | General | General | Sat Amp | Sat 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 |
|
|
71
|
Wed Jul 27 14:50:20 2022 |
Jennifer Hritz | General | Optical Contacting | Bonding without liquids and narrowing down heating issue | I 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 |
|
|
70
|
Tue Jul 26 14:17:44 2022 |
Juan | General | General | OSEMS 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 |
Juan | General | General | Update | Just 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 |
Paco | General | Design specs | HR coating update | Here are some corner plots to analyze the
sensitivity of the designs in the previous
elog to a 1% gaussian |
|
|
67
|
Mon Jul 18 18:34:29 2022 |
Paco | General | Design specs | HR coating update | I've been running the HR coating optimization
for mariner TMs. Relative to the specifications
found here |
|
|
66
|
Thu Jul 14 14:55:01 2022 |
Jennifer Hritz | General | Optical Contacting | Testing isopropanol and methanol | Note that I am just testing out different
techniques, so I have not set up the thermocouples
to precisely measure the temperatue. |
|
|
65
|
Wed Jul 13 13:16:33 2022 |
Juan | General | General | Finished coil driver and sat amp | I have finished all coil driver and sat
amp chassis they all seem to be functioning
properly. |
|
|
64
|
Mon Jul 11 17:39:17 2022 |
Juan | General | General | Coil 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 |
|
|
63
|
Mon Jul 11 17:27:39 2022 |
Jennifer Hritz | General | Optical Contacting | First successful bond | Note that the slides have "GLOBE"
printed on one side. I always bond the opposite
using the opposite side without the text. |
|
|
62
|
Mon Jul 11 16:24:31 2022 |
Jennifer Hritz | General | Optical Contacting | Baselining the temperature output of the Oster hot plate | This was performed last Friday (7/8).
I secured a thermocouple perpendicular
against the hotplate and recorded the |
|
|
61
|
Fri Jul 8 17:09:10 2022 |
Juan | General | General | Coil Driver and Sat Amp | All three coil driver boards are complete
and have been tested. Modification for all
4 sat amp have been completed. Ideally, I |
|
|
60
|
Thu Jul 7 15:20:04 2022 |
rana | General | Optical Contacting | some useful links | For 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 |
Juan | General | General | Update | Almost done with coil driver boards |
|
|
58
|
Tue Jul 5 21:06:47 2022 |
Juan | General | General | Work 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 |
|
|
57
|
Sat Jul 2 09:22:39 2022 |
Juan | General | General | Progress update | I've completed one coil driver board.
Hopefully next week I can finish the
other 2 boards and make the modifications |
|
|
56
|
Mon Jun 27 08:22:22 2022 |
Juan | General | General | General Update/ Need to do task | I've managed to cut and crimp wires
for the power board for coil driver. I will
begin adding components to the coil driver |
|
|
55
|
Thu Jun 23 21:11:03 2022 |
Koji | General | Suspension | Table for Mariner Suspension Cryo | Table moving effort in the OMC lab: See
https://nodus.ligo.caltech.edu:8081/OMC_Lab/412
|
|
|
54
|
Thu Jun 16 19:43:36 2022 |
Koji | General | Suspension | Table 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 |
Juan | General | Suspension | Table for Mariner Suspension Cryo | Today 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 |
rana | General | Suspension | Mariner Suspension Cryo shield Install / Removal steps | |
|
|
51
|
Thu May 5 19:56:25 2022 |
Koji | General | Suspension | Mariner Suspension Cryo shield Install / Removal steps | Does this work? Is this insane? |
|
|
50
|
Wed Dec 15 06:43:43 2021 |
Jiri Smetana | General | General | Lagrangian Model - Translation & Pitch | I'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 Smetana | General | General | Lagrangian Model - Translation & Pitch | I've been having a look at the transfer
functions for the translation and pitch of
both masses. I'm attaching the plot of |
|
|
48
|
Tue Nov 16 11:47:54 2021 |
Paco | General | Design specs | Estimate of in-air absorption near 2.05 um | [Paco]
There was an error in the last
plot of the previous log. This was correctly |
|
|
47
|
Fri Nov 5 11:51:50 2021 |
Paco | General | Design specs | Estimate of in-air absorption near 2.05 um | [Paco]
I used the HITRAN database to download
the set of ro-vibrational absorption lines |
|
|
46
|
Thu Nov 4 00:42:05 2021 |
Koji | General | Suspension | Mariner Sus Design | Some more progress:
- Shaved the height of the top
clamp blocks. We can extend the suspension |
|
|
45
|
Wed Nov 3 02:52:49 2021 |
Koji | General | Suspension | Mariner Sus Design | All parameters are temporary:
Test mass size: D150mm x L140mm
Intermediate mass size W152.4mm x |
|
|
44
|
Tue Oct 26 08:09:08 2021 |
Jiri Smetana | General | General | Lagrangian Suspension Model - Extended Body | I've been testing out the extended
body lagrangian models and I'm trying
to understand the ground motion and force |
|
|
43
|
Fri Oct 15 14:31:15 2021 |
Radhika | General | Heat Load | Mariner cooldown model status + next steps | I reran the cooldown model, setting the
emissivity of the inner surface of the inner
shield to 0.7 (coating), and the emissivity |
|
|
42
|
Fri Oct 15 13:45:55 2021 |
Radhika | General | Heat Load | Mariner cooldown model status + next steps | I used the same model in [37]
to consider how test mass length affects
the cooldown. Attachment 1 plots the curves |
|
|
41
|
Thu Oct 14 04:17:36 2021 |
Jiri Smetana | General | General | Damping 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 Smetana | General | General | Damping 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 |
|
|
39
|
Tue Oct 12 12:44:44 2021 |
Jiri Smetana | General | General | New Damping Loop Model | I've ironed out the issues with my
MATLAB model so that it now shows correct
phase behaviour. The problem seems to arise |
|
|
38
|
Mon Oct 11 15:22:18 2021 |
Yehonathan | General | General | Microcomb alternatives | Following our discussion at the Friday
JC meeting, I gathered several resources
and made a small simulation to show how frequency |
|
|
37
|
Tue Oct 5 17:46:14 2021 |
Radhika | General | Heat Load | Mariner cooldown model status + next steps | Building on [32],
I added a copper cold finger to conductively
cool the inner shield, instead of holding |
|
|
36
|
Fri Oct 1 14:11:23 2021 |
Paco | General | Design specs | TM Barrel coating emissivity | Agree with this.
Quickly running tmm on the same "stacks"
gave the Attachment #1-3. (Ignore the |
|
|
35
|
Fri Oct 1 13:24:40 2021 |
Aidan | General | Design specs | TM Barrel coating emissivity | I have to question whether this passes
a sanity test. Surely in the case of Stack
2, the 10um thick Ta2O5 will absorb the majority |
|
|
34
|
Fri Oct 1 12:01:24 2021 |
Paco | General | Design specs | TM Barrel coating emissivity | [Paco, Nina, Aidan]
We ran our stack emissivity calculation
on different AR stacks to try and make a |
|
|
33
|
Fri Oct 1 11:52:06 2021 |
Paco | General | Design specs | HR coating emissivity | [Paco, Nina, Aidan]
Updated the stack emissivity code
to use the Kitamura paper fused silica dispersion |
|
|
32
|
Wed Sep 29 16:15:19 2021 |
Radhika | General | Heat Load | Mariner cooldown model status + next steps | Attachment 1 is a geometric diagram that
reflects the current state of the ITM cooldown
model, introduced in [30]. |
|
|
31
|
Mon Sep 27 17:01:53 2021 |
rana | General | Heat Load | Mariner cooldown model status + next steps | How
about a diagram so that we can understand |
|
|
30
|
Fri Sep 24 13:12:00 2021 |
Radhika | General | Heat Load | Mariner cooldown model status + next steps | *Note: the current modeling script can
be found at: CryoEngineering/MarinerCooldownEstimation.ipynb
Nina pointed me to the current |
|
|
29
|
Fri Sep 24 11:02:41 2021 |
Koji | General | General | Actuation Feedback Model and Noise | We had a meeting with the code open in
ZOOM. Here are some points we discussed:
The code requires another |
|
|
28
|
Sun Sep 19 18:52:58 2021 |
Paco | General | Design specs | HR coating emissivity | [Paco, Nina]
We have been working on an estimate
of the wavelength dependent emissivity for |
|
|
27
|
Thu Sep 16 10:02:47 2021 |
Jiri Smetana | General | General | Actuation Feedback Model and Noise | Here's the DAC voltage spectrum with
its associated RMS.
Also, for clarity, this model is |
|
|
26
|
Wed Sep 15 09:15:21 2021 |
Jiri Smetana | General | General | Actuation Feedback Model and Noise | I've implemented a more extensive feedback
model that uses proper conversions between
metres, volts, counts etc. and includes all |
|
|
25
|
Thu Sep 9 20:42:34 2021 |
Paco | General | Design specs | Rerun HR coatings with n,k dispersion | [Paco]
Alright, I've done a re-optimization
targetting a wider T band around 2128 nm. |
|
|
24
|
Thu Sep 9 11:25:30 2021 |
Paco | General | Design specs | Rerun HR coatings with n,k dispersion | [Paco]
I've re-run the HR coating
designs for both ETM and ITM using interpolated |
|