| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
17352
|
Fri Dec 9 14:18:43 2022 |
Anchal | Summary | SUS | IMC optics angular actuation calibration at DC | Also reply to: 40m/16125
I migrated the code used
in 40m/16125 |
|
|
17230
|
Mon Nov 7 08:36:10 2022 |
JC | Update | SUS | IMC out of alignment -- f2A failure | [Paco, JC]
We came in this morning and noted
the IMC was grossly misaligned, with |
|
|
3016
|
Sun May 30 15:36:22 2010 |
Alberto | Configuration | PSL | IMC periscope shutter | Two days ago I opened the PSL shutter by
switching the switch on the shutter driver.
That caused the shutter's switch on the medm |
|
|
14275
|
Tue Nov 6 15:23:48 2018 |
gautam | Update | IOO | IMC problematic | The
IMC has been misbehaving for the last 5 hours. |
|
|
14277
|
Tue Nov 6 19:02:35 2018 |
aaron | Update | IOO | IMC problematic | That was likely me. I had recentered the
beam on the PD I'm using for the armloss
measurements, and I probably moved |
|
|
14289
|
Sat Nov 10 17:40:00 2018 |
aaron | Update | IOO | IMC problematic | Gautam was doing some DRMI locking, so
I replaced the photodiode at the AS port
to begin loss measurements again. |
|
|
14297
|
Thu Nov 15 10:21:07 2018 |
aaron | Update | IOO | IMC problematic | I ran a BNC from the PD on the AS table
along the cable rack to a free ADC channel
on the LSC whitening board. I lay the BNC |
|
|
14300
|
Fri Nov 16 10:53:07 2018 |
aaron | Update | IOO | IMC problematic | Back to loss measurements.
I replaced the PD I've been
using for the AS beam. |
|
|
14302
|
Sat Nov 17 18:59:01 2018 |
aaron | Update | IOO | IMC problematic | I made additional measurements on the x
and y arms, at 5 offset positions for each
arm (along with 6 measurements at the "zeroed" |
|
|
15588
|
Sun Sep 20 11:41:54 2020 |
gautam | Update | General | IMC re-locked | While I stopped by the lab this morning
to pick up some things, I took the opportunity
to continue the recovery. |
|
|
11145
|
Thu Mar 19 14:37:17 2015 |
manasa | Configuration | IOO | IMC relocked | The autolocker was struggling to lock the
IMC. I disabled the autolocker and locked the
IMC manually. It seems happy right now. |
|
|
14328
|
Sun Dec 2 17:26:58 2018 |
gautam | Update | IMC | IMC ringdown fitting | Recently we wondered at the meeting what
the IMC round trip loss was. I had done several
ringdowns in the winter of 2017, but because |
|
|
14334
|
Fri Dec 7 12:51:06 2018 |
gautam | Update | IMC | IMC ringdown fitting | I started putting together some code to
implement some ideas we discussed at the
Tuesday meeting here. Pipeline isn't |
|
|
12663
|
Mon Dec 5 01:58:16 2016 |
gautam | Update | IMC | IMC ringdowns | Over the weekend, I worked a bit on getting
these ringdowns going. I will post a more
detailed elog tomorrow but here is a quick |
|
|
12665
|
Mon Dec 5 15:55:25 2016 |
gautam | Update | IMC | IMC ringdowns | As promised, here is the more detailed
elog.
Part |
7x |
|
12666
|
Mon Dec 5 19:29:52 2016 |
gautam | Update | IMC | IMC ringdowns | The MC1 suspension troubles vanished as
they came - but the IMC was remaining locked
stably so I decided to do another round of |
|
|
12833
|
Wed Feb 15 23:54:13 2017 |
gautam | Update | IMC | IMC saga continues... | Following
the discussion at the meeting today, I wanted
to finish up the WFS tuning and then hand |
|
|
9453
|
Tue Dec 10 15:13:55 2013 |
Koji | Update | IOO | IMC servo inspection | Yesterday evening I inspected at IMC servo
as a preparation of the CM servo recommissioning.
More details to come. |
|
|
9457
|
Thu Dec 12 14:57:01 2013 |
Koji | Update | IOO | IMC servo inspection | In order to accomplish CARM control with
the PSL laser frequency, we use two actuators.
One is the longitudinal direction |
|
|
17009
|
Sat Jul 16 02:44:10 2022 |
Koji | Update | IOO | IMC servo tuning | I wasn't sure how the IMC servo was
optimized recently. We used to have the FSS
over all gain (C1:PSL-FSS_MGAIN) of +6dB |
|
|
16143
|
Sat May 15 14:54:24 2021 |
gautam | Update | SUS | IMC settings reverted | I want to work on the IFO this weekend,
so I reverted the IMC suspension settings
just now to what I know work (until the new |
|
|
16147
|
Thu May 20 10:35:57 2021 |
Anchal | Update | SUS | IMC settings reverted | For future reference, the new settings
can be upoaded from a script in the same
directory. Run python /users/anchal/20210505_IMC_Tuned_SUS_with_Gains/uploadNewConfigIMC.py |
|
|
5642
|
Mon Oct 10 12:14:00 2011 |
Mirko | Update | Computer Scripts / Programs | IMC simulations | [Mirko, Kiwamu]
I tried to answer two questions regarding
the IMC: |
|
|
17001
|
Wed Jul 13 18:58:17 2022 |
Koji | Update | IOO | IMC suspecion | This is just my intuition but the IMC servo
seems not so optimized. I can increase the
servo gain by 6~10dB easily. And I couldn't |
|
|
15881
|
Mon Mar 8 19:22:56 2021 |
rana | Summary | SUS | IMC suspension characterization | Herewith,
I describe an adventure |
|
|
16829
|
Wed May 4 13:09:42 2022 |
Anchal | Update | BHD | IMC table balanced again, IMC is locking, YARM is locking | [Paco, JC, Anchal]
We balanced the IMC table back
again to point that got us 50% of nominal |
|
|
2977
|
Tue May 25 00:10:24 2010 |
Zach | Update | IOO | IMC table leveled again | The IMC table had to be leveled again,
for two reasons: 1) It was un-leveled when
Jenne and Kiwamu removed an extra beam dump |
|
|
8108
|
Tue Feb 19 12:02:00 2013 |
Jamie | Update | IOO | IMC table levelling. | In order to address the issue of low MC1
OSEM voltages, Yuta and I looked at the IMC
table levelling. Looking with the bubble |
|
|
3874
|
Sat Nov 6 00:49:04 2010 |
Koji | Update | IOO | IMC table work | [Suresh, Koji]
- Removed MCT optics in the |
|
|
17249
|
Wed Nov 9 11:07:16 2022 |
Anchal | Update | SUS | IMC test | Following configurations were kept today
morning:
|
|
|
17289
|
Sun Nov 20 13:42:21 2022 |
Anchal | Update | SUS | IMC test | I repeated this test for the following
configuration:
PSL shutter closed at good |
|
|
17232
|
Mon Nov 7 12:02:15 2022 |
Anchal | Update | SUS | IMC test with PSL shutter closed. | Following configurations were kept today
morning:
|
|
|
10662
|
Mon Nov 3 17:14:00 2014 |
ericq | Update | ASC | IMC to IFO angular motion | Something to note, as we have the IMC angular
controls under consideration:
Jenne has the DRMI locked right now. |
|
|
10663
|
Mon Nov 3 17:43:14 2014 |
Koji | Update | ASC | IMC to IFO angular motion | I wonder if this is the coherence caused
by the beam itself, or caused by the same
ground motion. |
|
|
14335
|
Fri Dec 7 17:04:18 2018 |
gautam | Update | IOO | IMC transmission |
Power just before PSL shutter on
PSL table = 97 |
|
|
16705
|
Mon Mar 7 10:06:32 2022 |
Yehonathan | Update | IOO | IMC unlocked again, completely misaligned | Came this morning and saw that the IMC
is unlocked.
Went into MC Lock screen and see |
|
|
16708
|
Mon Mar 7 14:55:33 2022 |
Koji | Update | IOO | IMC unlocked again, completely misaligned | Hmm, the bias values were reset at 2022-03-03-20:01UTC
which is 2022-03-03-12:01 PST with no apparent
disruption of the data acquisition (= no |
|
|
13055
|
Fri Jun 9 15:31:45 2017 |
gautam | Update | IMC | IMC wonkiness | I've been noticing
some weird behaviour with the IMC over the |
|
|
13057
|
Fri Jun 9 17:45:21 2017 |
Gautam, Kaustubh | Update | IMC | IMC wonkiness |
|
|
|
13058
|
Fri Jun 9 19:18:10 2017 |
gautam | Update | IMC | IMC wonkiness | It happened again. MC2 UL seems to have
gotten the biggest glitch. It's a rather
small jump in the signal level compared to |
|
|
13061
|
Mon Jun 12 22:23:20 2017 |
rana | Update | IMC | IMC wonkiness | wonder if its possible that the slow glitches
in MC are just glitches in MC2 trans QPD?
Steve sometimes dances on top of the MC2 |
|
|
13062
|
Tue Jun 13 08:40:32 2017 |
Steve | Update | IMC | IMC wonkiness | Happy MC after last glitch at 10:28 so
the credit goes to Rana
|
|
|
11436
|
Wed Jul 22 15:09:40 2015 |
ericq | Update | General | IMC work | The other night, I spent some time with
the mode cleaner.
First, I made some model changes |
|
|
11486
|
Mon Aug 10 11:57:45 2015 |
ericq | Update | General | IMC work |
|
|
|
13278
|
Thu Aug 31 00:19:35 2017 |
rana[^r] | Update | PSL | IMC/FSS FAST gain | nominal changed from 22 to 23 dB to minimize
PC drive RMS
|
|
|
12875
|
Thu Mar 9 15:25:12 2017 |
Koji | Update | General | IMC/XYarms aligned/locked | As per Steve's request, I've checked
the alignment of the IMC and the arms. These
three cavities are locked and aligned. |
|
|
3797
|
Wed Oct 27 15:38:19 2010 |
josephb, yuta | Update | CDS | IO chassis with bad timing was taken back to Downs | Problem:
The front end timing was not working
properly for 2 of the IO chassis. They |
|
|
6676
|
Thu May 24 15:10:43 2012 |
Suresh | Summary | General | IOO (MC) health check webpage layout | Here is the suggested layout
of the MC health check web page layout. I
will update the Omnigraffle file as people |
|
|
11296
|
Sun May 17 23:46:25 2015 |
rana | Update | ASC | IOO / Arm trends | Looking
at the summary
page trends from today, you can see that |
|
|
17484
|
Sun Feb 26 00:13:55 2023 |
Alex | Configuration | ASC | IOO MC PIT/YAW gain change | The following changes were made to the
WFS MASTER IMC Pitch and Yaw gains:
Gain values for the pitch and yaw |
|