ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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), |
|
|
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 |
|
|
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 |
|
|
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) |
|
|
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 |
|
|
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 |
|
|
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. |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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; |
|
|
16514
|
Thu Dec 16 15:32:59 2021 |
Anchal | Update | BHD | Finished Coil driver (odd serial number) units tests | We have completed modifications and testing
of the HAM Coil driver D1100687 units with
serial numbers listed below. The DCC |
|
|
16515
|
Thu Dec 16 15:54:08 2021 |
Koji | Update | Electronics | ITMX feedthroughs and in-vac cables installed | Thanks for the installation.
With regard to the connector convention,
let's use the attached arrangement so |
|
|
16516
|
Thu Dec 16 17:41:12 2021 |
Koji | Update | BHD | Coil driver test failed for S2100619-v1 | Good catch. It turned out that the both
+ and - side of the output stages for CH2
were oscillating at ~600kHz. If I use a capacitance |
6x |
|
16517
|
Thu Dec 16 17:57:17 2021 |
Anchal | Update | BHD | Finished Coil driver (odd serial number) units tests | S2100619 was fixed
by Koji and it passed the test after
that. |
|
|
16518
|
Thu Dec 16 18:16:36 2021 |
Yehonathan | Update | BHD | SOS assembly | Today I glued magnets onto the new 3/4"
mirror adapters. I also took the opportunity
to make some more side magnets assemblies. |
|
|
16519
|
Fri Dec 17 12:32:35 2021 |
Koji | Update | SUS | Remaining task for 2021 | Anything else? Feel free to edit this entry.
- SUS: AS1 hanging
- SUS: PR3/SR2/LO2 3/4" thick |
|
|
16520
|
Fri Dec 17 17:50:17 2021 |
Yehonathan | Update | BHD | SOS assembly | I threaded a new wire through a different
side block with a magnet and clamped it under
a microscope. It was hard, but eventually, |
|
|
16521
|
Fri Dec 17 19:16:45 2021 |
Koji | Update | BHD | SOS assembly | We @40m do the convention of the arrow
at the thinnest side & pointing the HR
side, but nobody says Lambda does the same. |
|
|
16522
|
Fri Dec 17 19:19:42 2021 |
Koji | Update | SUS | Remaining task for 2021 | I had the fear that any mistake in the
electronics chain could have been the show
stopper. |
|
|
16523
|
Fri Dec 17 22:16:07 2021 |
Yehonathan | Update | BHD | SOS assembly | I specifically checked the specification
before mounting the mirror. It says clearly
"Arrow at the thinnest location pointing |
|
|
16524
|
Sat Dec 18 00:56:14 2021 |
Koji | Update | BHD | SOS assembly | Sad... We just need to check the wedge
direction everytime, unfortunately.
Pencil: can you try to gently wipe |
|
|
16525
|
Sun Dec 19 07:52:51 2021 |
Anchal | Update | SUS | Remaining task for 2021 | The I/O chassis reassigns the ADC and DAC
indices on every power cycle. When we moved
it, it must have changed it from the order |
|
|
16526
|
Mon Dec 20 13:52:01 2021 |
Koji | Update | BHD | SOS assembly | LO1: No need to remove
the pencil mark for the damping test. Until
we see serious contamination on the LO1 optic, |
|
|
16527
|
Mon Dec 20 14:10:56 2021 |
Anchal | Update | BHD | All coil drivers ready to be used, modified and tested | Koji found some 68nF caps from Downs and
I finished modifying the last remaining coil
driver box and tested it. |
|
|
16528
|
Mon Dec 20 17:26:13 2021 |
Yehonathan | Update | BHD | SOS assembly | {Yehonathan, Anchal}
I released the AS1 wires from the
winches, removed the adapter from the SOS |
7x |
|
16529
|
Tue Dec 21 16:35:39 2021 |
Koji | Update | VAC | ITMX NW feedthru (LO1-1) connector pin bent | I've received a report that a pin of
an ITMX NW feedthru connector was bent. (Attachment
1) |
|
|
16530
|
Tue Dec 21 16:52:39 2021 |
Anchal | Summary | Electronics | In-air Sat Amp to Vacuum Flange cables laid for 7 new SOS | [Anchal, Yehonathan, Chub]
We today laid down 14 70 ft long
DB25 cables from 1Y1 (6), 1Y0 (8) to ITMY |
|
|
16531
|
Tue Dec 21 18:04:46 2021 |
Yehonathan | Update | BHD | SOS assembly | I locked the EQ stops while retaining the
XY alignment on the QPD and installed 5 green
OSEMs. AS1 is ready for transfer into the |
|
|
16532
|
Wed Dec 22 14:57:05 2021 |
Koji | Update | General | chiara local backup | chiara
local backup of /cvs/cds has not been running
since the move of chiara in Nov 19. |
|
|
16533
|
Wed Dec 22 17:40:22 2021 |
Anchal | Summary | CDS | c1su2 model updated with SUS damping blocks for 7 SOSs | [Anchal, Koji]
I've updated the c1su2 model
today with model suspension blocks for the |
|
|
16534
|
Wed Dec 22 18:16:23 2021 |
Koji | Update | SUS | Remaining task for 2021 | The in-vacuum installation team has reported
that the side OSEMs of ITMX and LO1 are going
to be interfering if place LO1 at the planned |
|
|
16535
|
Thu Dec 23 16:38:21 2021 |
Koji | Update | General | Is megatron down? (Re: chiara local backup) | The local backup seems working fine again.
But I found that megatron
is down and this is a real issue. This should |
|
|
16536
|
Fri Dec 24 16:49:41 2021 |
Koji | Update | General | Is megatron down? (Re: chiara local backup) | It turned out that the UPS installed on
Nov 22 failed (cf https://nodus.ligo.caltech.edu:8081/40m/16479
). As a fact, it was alive just for |
|
|
16537
|
Wed Dec 29 20:09:40 2021 |
rana | Summary | CDS | c1su2 model updated with SUS damping blocks for 7 SOSs | We want to maintain the 16 kHz sample rate
for the COIL DAQ channels, but nothing wrong
with reducing the others. |
|
|
16538
|
Sun Jan 2 20:46:46 2022 |
Koji | Update | SUS | End SUS Electronics building | 19:00~ Start working on the electronics
bench
The following units were tested |
|
|
16539
|
Mon Jan 3 12:05:08 2022 |
Paco | Update | BHD | 1Y0 rack work for LO2 AS1 AS4 | [Paco, Anchal]
Continue working on 1Y0. Added
coil drivers for LO2, AS1, AS4. Anchal made |
|
|
16540
|
Mon Jan 3 16:46:41 2022 |
Paco | Update | BHD | 1Y1 rack work for SR2, PR2, PR3 | [Paco, Anchal]
Continued working on 1Y1 rack.
Populated the 6 coil drivers, made all connections |
|
|
16541
|
Tue Jan 4 18:26:59 2022 |
Anchal | Update | BHD | Tested 2" PR2 candidates transmission | I used the rejected light from the PBS
after the motorized half-wave plate between
PMC and IMC injection path (used for input |
|
|
16542
|
Tue Jan 4 18:27:23 2022 |
Paco | Update | BHD | SOS assembly -- PR3 | [yehonathan, paco, anchal]
We continue suspending PR3 today.
Yehonathan and Paco suspended the thick optic |
|
|
16543
|
Wed Jan 5 17:46:04 2022 |
Anchal | Update | BHD | Tested 2" PR2 candidates transmission | I tested 2 more optics today, the old PR2
that we took out and another optic I found
in QIL. Both these optics are also not good |
|