| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
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 |
|
|
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 |
|
|
76
|
Tue Aug 16 09:58:23 2022 |
Paco | General | Design specs | HR coating update | A couple of coating stacks with better
tolerance (transmission +- 10%). Attachments
#1-2 show the spectral reflectivities |
6x |
|
78
|
Tue Aug 23 17:10:50 2022 |
Paco | General | Design specs | New corner plots | Instead of varying individual layer thicknesses
using the MC sampler, I made sure both the
thickness and index of refractions are varied |
|
|
12
|
Tue Apr 27 12:28:43 2021 |
Nina Vaidya & Shruti Maliakal | General | Design specs | Arm Cavity Design 2021 | Rana’s code: R_c = 57.3
-->New code with optimization:
sweeping through a range of R_c, using a |
|
|
14
|
Fri May 7 17:50:31 2021 |
Nina Vaidya & Shruti Maliakal | General | Design specs | Arm Cavity Design 2021 update | Here are the final slides with all the
results on the Arm Cavity Design, please
review. |
|
|
1
|
Thu May 21 11:51:44 2020 |
Koji | General | General | Mariner Elog Test | The first entry of the Mariner elog post |
|
|
16
|
Tue Jun 22 22:28:09 2021 |
Koji | General | Design specs | Test Mass wedge design | The
ETM wedge of 0.5deg will allow us to separate
the AR reflections. We will be OK with the |
|
|
20
|
Fri Aug 6 04:34:43 2021 |
Koji | General | General | Theoretical Cooling Time Limit | I 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, |
|
|
21
|
Tue Aug 17 17:48:57 2021 |
Koji | General | Equipment | Crackle SW model | As a kickoff of the mariner sus cryostat
design, I made a tentative crackle chamber
model in SW. |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
51
|
Thu May 5 19:56:25 2022 |
Koji | General | Suspension | Mariner Suspension Cryo shield Install / Removal steps | Does this work? Is this insane? |
|
|
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). |
|
|
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
|
|
|
120
|
Mon Jan 9 21:03:53 2023 |
Koji | General | General | Heavy item transport - preparation | 1) Paco cleared the path in the DOPO lab.
We'll need a flat dolly or wooden bars
(covered with a mylar sheet) to place the |
|
|
121
|
Tue Jan 10 23:30:25 2023 |
Koji | General | General | Heavy item transport - preparation | [JC, Stephen, Paco, Gabriele, Aidan,
Radhika, Koji]
We have successfully extracted |
|
|
122
|
Thu Jan 12 11:38:26 2023 |
Koji | General | General | How to move the large engine hoist through the narrow door | See the attachments. |
|
|
123
|
Thu Jan 12 11:54:08 2023 |
Koji | General | General | Heavy item transport | [JC, Koji]
Caltech transport came in this
morning. They first went to the OMC lab and |
7x |
|
124
|
Thu Jan 12 15:36:22 2023 |
Koji | General | General | Crane configuration for the suspension test chamber | I made a quick investigation of the crane
configuration for the suspension test chamber.
Conclusions: |
|
|
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 |
|
|
75
|
Mon Aug 15 16:37:51 2022 |
Juan | General | General | Update on Sat Amp and OSEMs | Sat
Amp
|
|
|
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 |
|
|
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 |
|
|
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 |
|
|
59
|
Thu Jul 7 10:23:04 2022 |
Juan | General | General | Update | Almost done with coil driver boards |
|
|
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 |
|
|
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 |
|
|
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. |
|
|
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 |
|
|
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 |
|
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 |
|
|
74
|
Mon Aug 8 13:00:56 2022 |
Juan | General | General | Sat Amp testing of OSEMS | In the following test, a single Sat Amp
chassis that holds Sat Amp Board S1106078
and S1106077 |
|
|
22
|
Tue Aug 24 08:15:37 2021 |
Jiri Smetana | General | General | Actuation Feedback Model | I'm posting a summary of the work I've
done on the Lagrangian analysis of the Mariner
suspension design and a state space model |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
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 |
|
|
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 |
|
|
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. |
|
|
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 |
|
|
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. |
|
|
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. |
|
|
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 |
|
|
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 |
|
|
77
|
Tue Aug 16 19:54:29 2022 |
Jennifer Hritz | General | Optical Contacting | Razor blade test | We succeeded in setting up an apparatus
for quantifiying the razor blade test. After
mounting the glass slides such that |
|
|
82
|
Tue Sep 27 22:29:34 2022 |
Jennifer Hritz | General | Optical Contacting | Razor test apparatus disassembly pictures | Pictures of the razor test apparatus before
and after disassembly, to make future reassembly
easier. |
|