| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
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. |
|
|
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 |
|
|
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
|
|
|
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: |
|
|
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. |
|
|
4
|
Thu Mar 4 17:04:52 2021 |
Paco | General | Design specs | Silicon TM dichroic coatings for phase I | Have been using the 40m
Coatings repo code by Gautam (with some
modifications to make dichroic designs under |
|
|
6
|
Wed Mar 17 19:51:42 2021 |
Paco | General | Design specs | Silicon TM dichroic coatings for phase I | Update on ETM
New optima are
being found using the same basic code with
some modifications, which I summarize below; |
|
|
8
|
Wed Mar 24 17:36:46 2021 |
Paco | General | Design specs | Least common multiple stacks and varL cost | Update on ETM/ITM coating design;
-
Following what seemed like a good, intuitive
suggestion from Anchal, I implemented a parameter |
|
|
9
|
Wed Mar 24 17:42:50 2021 |
Paco | General | Design specs | Silicon TM dichroic coatings for phase I | Yeah, the magnitudes are the inverse weighted
scalar costs (so they lie on the appropriate
relative scale) and indeed larger enclosed |
|
|
10
|
Fri Apr 2 19:59:53 2021 |
Paco | General | Design specs | Differential evolution strategies | Differential evolution strategies 'benchmarking'
for thin film optimization
Since
I have been running the ETM/ITM coatings |
|
|
15
|
Fri Jun 4 11:09:27 2021 |
Paco | General | Design specs | HR coating tolerance analysis | The HR coating specifications are:
ETM |
|
|
19
|
Tue Jul 27 11:38:25 2021 |
Paco | General | Design specs | DOPO single pass PDC efficiency | Here is a set of curves describing the
single-pass downconversion efficiency in
the 20 mm long PPKTP crystals for the DOPO. |
|
|
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 |
|
|
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. |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|