| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
16443
|
Tue Nov 2 15:02:03 2021 |
Yehonathan | Update | BHD | SOS assembly | {Yehonathan, Tega}
We took the free-swinging spectra
of the OpLev in the X and Y direction. |
|
|
16444
|
Tue Nov 2 16:42:00 2021 |
Paco | Summary | BHD | 1Y1 rack work | [paco, ian]
After the new 1Y0 rack was placed
near the 1Y1 rack by Chub and Anchal, today |
|
|
16445
|
Tue Nov 2 18:54:41 2021 |
Anchal, Paco | Update | BHD | Optical fibres laid for BHD upgrade | We successfully laid down all required
optical fibre fiber cables from 1X4-1X7
region to 1Y1-1Y3 region today. This includes |
|
|
16446
|
Tue Nov 2 22:50:30 2021 |
Koji | Update | BHD | SOS assembly | 2.5Hz is surprising. Can you move it down
to sub 1Hz by adding a socket cap screw at
the top instead of the set screw for the |
|
|
16447
|
Wed Nov 3 16:55:23 2021 |
Ian MacMillan | Summary | SUS | SUS Plant Plan for New Optics | [Ian, Tega, Raj]
This is the rough plan for the
testing of the new suspension models with |
|
|
16448
|
Thu Nov 4 15:03:43 2021 |
Koji | Summary | BHD | 1Y1 rack work | I have visited the binder file for the
40m wiring file in the control room.
The 12V power supply on 1Y1 is for |
|
|
16449
|
Thu Nov 4 18:29:51 2021 |
Tega | Update | SUS | Setting up suspension test model | [Ian,Tega]
Today we continued working on setting
up the 6 degrees of freedom model for |
|
|
16450
|
Fri Nov 5 12:21:16 2021 |
Anchal | Summary | BHD | Part VI of BHR upgrade - Removal of ITMYC optics | Today I opened the ITMY chamber and removed
the following optics and placed them in Xend
flow bench (See attachment 1-3 for updated |
|
|
16451
|
Fri Nov 5 12:49:32 2021 |
rana | Update | SUS | Setting up suspension test model | Please don't put it on c1sus2. Put
it on the completely independent test stand
as we discussed Wednesday. You must |
|
|
16452
|
Fri Nov 5 20:35:10 2021 |
Koji | Update | BHD | Feedthru / Optical Mounts | - New feedthrus [4xDB25 Qty 4 / 8xDB25
Qty 1] are placed on the wire shelf at the
entrance -> Jordan, please clean them. |
|
|
16453
|
Mon Nov 8 10:13:52 2021 |
Paco | Summary | BHD | 1Y1 rack work; Sorensens removed | [Paco, Chub]
Removed all sorensen power supplies
from this rack except for 12 VDC one; that |
|
|
16454
|
Mon Nov 8 13:13:00 2021 |
Koji | Summary | BHD | 1Y1 rack work; Sorensens removed | Updated the rack layout. Now there is an
issue.
We were supposed to have 1U space |
|
|
16455
|
Mon Nov 8 15:29:05 2021 |
Paco | Summary | BHD | 1Y1 rack work; New power for cameras | [Paco, Anchal]
In reference to Koji's concern
(see previous elog), we have completely removed |
|
|
16456
|
Mon Nov 8 17:22:27 2021 |
Yehonathan | Update | BHD | SOS assembly | Big Gluing
Day |
|
|
16457
|
Mon Nov 8 17:52:22 2021 |
Ian MacMillan | Update | SUS | Setting up suspension test model | [Ian, Tega]
We combined a controler and a plant
model into a single modle (See first attachment) |
|
|
16458
|
Mon Nov 8 18:42:38 2021 |
Koji | Summary | BHD | Rack Layout / Power Strips |
Rack
|
|
|
16459
|
Tue Nov 9 11:11:37 2021 |
Yehonathan | Update | BHD | SOS assembly | The gluing was mostly successful. Only
two magnets didn't stick (see attachment). |
|
|
16460
|
Tue Nov 9 13:40:02 2021 |
Ian MacMillan | Summary | Computer Scripts / Programs | SUS Plant Plan for New Optics | [Ian, Tega]
After talking with Rana we have
an updated plan. We will be working on this |
|
|
16461
|
Tue Nov 9 16:55:52 2021 |
Ian MacMillan | Summary | Computer Scripts / Programs | SUS Plant Plan for New Optics | [Ian, Tega]
We have moved c1sim computer from
the test stand to the server rack in the |
|
|
16462
|
Tue Nov 9 18:05:03 2021 |
Ian MacMillan | Summary | Computer Scripts / Programs | SUS Plant Plan for New Optics | [Ian, Tega]
Now that the computer is in its
new rack I have copied over the filter two |
|
|
16463
|
Tue Nov 9 19:02:47 2021 |
Anchal | Summary | BHD | 1Y0 Populated and 1Y1,1Y0 powered | [Anchal, Paco]
Today we populated 4 Sat Amp boxes
for LO1, Lo2, AS1, and AS4, 2 BO boxes for |
|
|
16464
|
Thu Nov 11 00:11:39 2021 |
Koji | Summary | SUS | 2" to 3" sleeve issue | Yehonathan and Tega found that the new
PR3 and SR3 delivered in 2020 is in fact 3/4" |
6x |
|
16465
|
Fri Nov 12 23:47:29 2021 |
Yehonathan | Update | BHD | SOS assembly | {Tega, Yehonathan}
First
attempt at the suspension of a Lambda Optic |
|
|
16466
|
Mon Nov 15 15:12:28 2021 |
Ian MacMillan | Summary | Computer Scripts / Programs | SUS Plant Plan for New Optics | [Ian, Tega]
We are working on three fronts
for the suspension plant model: |
|
|
16467
|
Tue Nov 16 11:37:26 2021 |
Hang | HowTo | SUS | Fitting suspension model--large systematic errors | One goal of our sysID study is to improve
the aLIGO L2A feedforward. Our algorithm
currently improves only the statistical uncertainty |
|
|
16469
|
Tue Nov 16 17:29:49 2021 |
Ian MacMillan | Summary | Computer Scripts / Programs | SUS Plant Plan for New Optics | [Ian, Tega]
Updated A, B, C, D matrices for
the state-space model to remove bugs in the |
|
|
16470
|
Tue Nov 16 17:42:46 2021 |
Yehonathan | Update | BHD | SOS assembly | {Tega, Yehonathan}
Another
attempt at the suspension of a Lambda Optic |
|
|
16471
|
Tue Nov 16 18:28:53 2021 |
Koji | Update | BHD | SOS assembly | Yehonathan told me that the wires
are touching between the clamps!
I went back to the CAD and confirmed |
|
|
16472
|
Wed Nov 17 07:32:48 2021 |
Chub | Update | General | wire clamp plate mod | This will be difficult to modify with the
magnets and dumbells in place. Even
if someone CAN clamp this piece into an endmill |
|
|
16473
|
Wed Nov 17 11:53:27 2021 |
Koji | Update | General | wire clamp plate mod | Of course, we remove the magnet-dumbbell
for machining. After that the part will be
cleaned/baked again. And Yehonathan is going |
|
|
16474
|
Wed Nov 17 17:37:53 2021 |
Anchal | Update | General | Placed Nodus and fb1 on UPS power | Today I placed nodus and fb1 on UPS battery
backed supply. Now power glitches should
not hurt our cds system. |
|
|
16475
|
Thu Nov 18 14:29:01 2021 |
Koji | Summary | BHD | BHD invac optics / opto-mechanics | I |
|
|
16476
|
Thu Nov 18 15:16:10 2021 |
Anchal | Update | General | Moved Chiara to 1X7 above nodus powered with same UPS | [Anchal, Paco]
We moved chiara to 1X7 above nodus
and powered with same UPS from a battery |
|
|
16477
|
Thu Nov 18 20:00:43 2021 |
Ian MacMillan | Summary | Computer Scripts / Programs | SUS Plant Plan for New Optics | [Ian, Raj, Tega]
Here is the comparison between |
|
|
16478
|
Mon Nov 22 16:38:26 2021 |
Tega | Summary | Computer Scripts / Programs | SUS Plant Plan for New Optics | [Tega, Ian]
TODO
1. Investigate cross-coupling |
|
|
16479
|
Mon Nov 22 17:42:19 2021 |
Anchal | Update | General | Connected Megatron to battery backed ports of another UPS | [Anchal, Paco]
I used the UPS that was providing
battery backup for chiara earlier (a APS |
|
|
16480
|
Tue Nov 23 18:02:05 2021 |
Anchal | Update | IMC | MC autolocker shifted to python3 script running in docker | I finished copying over the current autolocker
bash script functionality into a python script |
|
|
16481
|
Wed Nov 24 11:02:23 2021 |
Ian MacMillan | Summary | Computers | Quantization Noise Calculation Summary | I added mpmath
to the quantization noise code. mpmath allows
me to specify the precision that I am using |
|
|
16482
|
Wed Nov 24 13:44:19 2021 |
rana | Summary | Computers | Quantization Noise Calculation Summary | This looks great. I think what we want
to see mainly is just the noise in the 32
bit IIR filtering subtracted from the 64 |
|
|
16483
|
Wed Nov 24 14:15:15 2021 |
Yehonathan | Update | BHD | SOS assembly | Late update. We got 2 modified side blocks
from Jordan a few days ago. Yesterday, I
glued a side magnet to one of the modified |
|
|
16484
|
Wed Nov 24 14:34:15 2021 |
Yehonathan | Update | BHD | Saving on SUSAUX slow channels | Koji found out that the stock for BIO Acromag
modules is very low and that the lead time
for ordering new ones is ~ 1-year X-o. |
|
|
16485
|
Wed Nov 24 17:13:31 2021 |
Yehonathan | Metaphysics | General | Toilet tank broken | The toilet tank in the big bathroom stopped
refilling. I contacted PPService@caltech.edu
and put up an "Out of Order sign". |
|
|
16486
|
Mon Nov 29 15:24:53 2021 |
Hang | HowTo | General | Fisher matrix vs length of each FFT segment | We have been discussing how does the parameter
estimation depends on the length per FFT
segment. In other words, after we collected |
|
|
16487
|
Tue Nov 30 11:03:44 2021 |
Yehonathan | Metaphysics | General | Toilet tank broken | a plumber came in yesterday and fixed the
issue.
|
|
|
16488
|
Tue Nov 30 17:11:06 2021 |
Paco | Update | General | Moved white rack to 1X3.5 | [Paco, Ian, Tega]
We moved the white rack (formerly
unused along the YARM) to a position between |
|
|
16489
|
Wed Dec 1 12:57:08 2021 |
Yehonathan | Update | BHD | SOS assembly | {Yehonathan, Tega}
We glued some magnets onto modified
side blocks. We followed pretty much the |
7x |
|
16490
|
Mon Dec 6 14:26:52 2021 |
Koji | Update | VAC | Pumping down the RGA section | Jordan reported that the RGA section needs
to be pumped down to allow the analyzer to
run at sufficiently low pressure (P<1e-4 |
|
|
16491
|
Mon Dec 6 18:23:04 2021 |
Yehonathan | Update | BHD | SOS assembly | I installed OSEMs on the LO1 SOS. To my
surprise, the side magnet is not in the center
of the side OSEM. It completely misses the |
|
|
16492
|
Tue Dec 7 10:55:25 2021 |
Ian MacMillan | Summary | Computers | Quantization Noise Calculation Summary | [Ian, Tega]
Tega and I have gone through the
IIR |
|
|
16493
|
Tue Dec 7 13:12:50 2021 |
Koji | Update | VAC | Pumping down the RGA section | So that Jordan can run the RGA scan this
afternoon, I ran TP3 and started pumping
down the RGA section. |
|