ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
16513
|
Thu Dec 16 15:04:12 2021 |
Chub | Update | Electronics | ITMX feedthroughs and in-vac cables installed | The ITMX 10" flange with four DSUB-25
feedthroughs has been install with the cables
connected at the in-vac side. See photo; |
|
|
16512
|
Thu Dec 16 12:21:16 2021 |
Anchal | Update | BHD | Coil driver test failed for S2100619-v1 | Today I found one of the coil driver boards,
S2100619
failed the test on CH2. There appears to |
|
|
16511
|
Wed Dec 15 22:09:53 2021 |
Yehonathan | Update | BHD | SOS assembly | {Paco, Yehonathan, Anchal}
I cut the wires from the winches
and removed the winch adapter plate. I engrave |
|
|
16510
|
Wed Dec 15 17:44:18 2021 |
Koji | Summary | BHD | Part VIII of BHR upgrade - Placed LO1 | If ITMX already has another side magnet,
we can migrate the side OSEM of ITMX to the
other side. This way, the interference of |
|
|
16509
|
Wed Dec 15 16:11:38 2021 |
Anchal | Summary | BHD | Part VIII of BHR upgrade - Placed LO1 | [Anchal, Yehonathan, Paco]
Today we opened ITMX chamber
and removed the following optics and placed |
|
|
16508
|
Wed Dec 15 15:06:08 2021 |
Jordan | Update | VAC | Vacuum Feedthru Install | Jordan, Chub
We installed the 4x DB25 feedthru
flange on the North-West port of ITMX chamber |
|
|
16507
|
Wed Dec 15 13:57:59 2021 |
Paco | Update | Computers | upgraded ubuntu on zita | [Paco]
Upgraded zita's ubuntu and
restarted the striptool script. |
|
|
16506
|
Tue Dec 14 19:29:42 2021 |
Paco | Update | BHD | 1Y0 rack work for LO1 | [Paco]
Two coil drivers have been installed
on 1Y0 (slots 6, 7, for LO1 SOS). All connections |
|
|
16505
|
Tue Dec 14 14:02:33 2021 |
Yehonathan | Update | BHD | SOS assembly | {Yehonathan, Paco}
I fixed the overall height of the
adapter (attachment 1). I put an OSEM next |
|
|
16504
|
Tue Dec 14 11:33:29 2021 |
Tega | Update | PEM | git repo for temp sensor and sus medm | [Temperature sensor]
Added new temp EPICs channels to
database file (/cvs/cds/caltech/target/c1pem1/tempsensor/C1PEMaux.db) |
|
|
16503
|
Mon Dec 13 15:05:47 2021 |
Tega | Update | PEM | git repo for temp sensor and sus medm | [temperature sensor]
git repo: https://git.ligo.org/40m/tempsensor.git
todo |
|
|
16502
|
Fri Dec 10 21:35:15 2021 |
Koji | Summary | SUS | Vertex SUS DAC adapter ready | 4 units of Vertex SUS DAC adapter (https://dcc.ligo.org/LIGO-D2100035)
ready.
https://dcc.ligo.org/LIGO-S2101689 |
|
|
16501
|
Fri Dec 10 19:22:01 2021 |
Koji | Update | VAC | Pumping down the RGA section | The scan result was ~x10 higher than the
previously reported scan on 2020/9/15 (https://nodus.ligo.caltech.edu:8081/40m/15570), |
|
|
16500
|
Fri Dec 10 18:55:58 2021 |
Tega | Update | CDS | New SUS medm screen update | Turns out the BLRMS monitoring channels
for MC1, MC2, MC3, ITMY and SRM already exist
in c1pem. So I modified the new SUS screen |
|
|
16499
|
Fri Dec 10 15:59:23 2021 |
Paco | Update | BHD | Finished Coil driver (even serial number) units tests | [Paco, Anchal]
We have completed modifications
and testing of the HAM Coil driver D1100687 |
|
|
16498
|
Fri Dec 10 13:02:47 2021 |
Ian MacMillan | Summary | Computers | Quantization Noise Calculation Summary | I am trying to replicate the simulation
done by Matt Evans in his
presentation (see Attachment |
|
|
16497
|
Thu Dec 9 21:57:35 2021 |
Yehonathan | Update | BHD | SOS assembly | {Yehonathan, Tega}
We took the optic out of the SOS
tower and removed the side blocks. We mounted |
|
|
16496
|
Thu Dec 9 18:22:36 2021 |
Tega | Update | CDS | New SUS medm screen update | Work on the medm screen for SUS RMS
monitor is ongoing. The next step would
be to incorporate this into the |
|
|
16495
|
Thu Dec 9 00:32:56 2021 |
Tega | Update | CDS | New SUS medm screen update | The new SUS screen can be reached via sitemap
-> IFO SUS button -> NEW
ETMX dropdown menu link. Please use and provide |
|
|
16494
|
Wed Dec 8 10:14:43 2021 |
Jordan | Update | VAC | Pumping down the RGA section | After an overnight pumpdown/RGA warm up,
I took a 100 amu scan of the RGA volume and
subsequent pumping line. Attached is a screenshot |
|
|
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. |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
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 |
|
|
16487
|
Tue Nov 30 11:03:44 2021 |
Yehonathan | Metaphysics | General | Toilet tank broken | a plumber came in yesterday and fixed the
issue.
|
|
|
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 |
|
|
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". |
|
|
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. |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
16475
|
Thu Nov 18 14:29:01 2021 |
Koji | Summary | BHD | BHD invac optics / opto-mechanics | I |
|
|
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. |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
16470
|
Tue Nov 16 17:42:46 2021 |
Yehonathan | Update | BHD | SOS assembly | {Tega, Yehonathan}
Another
attempt at the suspension of a Lambda Optic |
|
|
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 |
|
|
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 |
|
|
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: |
|
|
16465
|
Fri Nov 12 23:47:29 2021 |
Yehonathan | Update | BHD | SOS assembly | {Tega, Yehonathan}
First
attempt at the suspension of a Lambda Optic |
|
|
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 |
|
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 |
|