| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
17636
|
Fri Jun 16 23:09:31 2023 |
Mayank | Update | | IFO working after ETMX electronics upgrade | After lots of burtrestores and alignment
by Koji. The interferometer is live again.
The X/Y green beams are resonating. |
|
|
17637
|
Fri Jun 16 23:23:56 2023 |
Koji | Update | | IFO working after ETMX electronics upgrade | Remaining work:
Hardware
The +/-15V power supply |
|
|
17638
|
Mon Jun 19 01:05:49 2023 |
Koji | Update | | IFO working after ETMX electronics upgrade | ETMX
Eurocard Crate investigation ~ Summary
- |
|
|
17642
|
Wed Jun 21 08:21:03 2023 |
JC | Update | | IFO working after ETMX electronics upgrade | Andrei asked me yesterday for the location
of the ambient temperature sensor for the
X-end. He mentioned that he needed to run |
|
|
17646
|
Thu Jun 22 00:27:27 2023 |
Koji | Update | | IFO working after ETMX electronics upgrade | [Koji, Hiroki]
ETMX OPLEV QPD was fixed.
- What we knew was that |
|
|
17647
|
Thu Jun 22 00:47:00 2023 |
Koji | Update | | IFO working after ETMX electronics upgrade | [Mayank, Koji]
ETMX Sat amp (D080276)
CH3 PD receiver circuit fixed. |
|
|
16441
|
Sun Oct 31 14:21:31 2021 |
rana | HowTo | Treasure | IFOCad | IFOcad model/video of the AEI 10m interferometer:
https://10m.aei.mpg.de/design-and-sensitivity/ |
|
|
729
|
Thu Jul 24 01:04:01 2008 |
rob | Configuration | LSC | IFR2023A (aka MARCONI) settings | [quote]
P.S.: We made a test by changing the frequency |
|
|
16833
|
Thu May 5 17:05:31 2022 |
Tega | Update | BHD | IMC & X/Y-arm alignment | [Yuta, Tega]
In order to setup POP camera and
RFPD on the ITMX table, we decided to first |
|
|
17189
|
Thu Oct 13 23:25:22 2022 |
rana | Update | IMC | IMC ASC: summary pages and notes | Tega has kindly made a summary page for
the IMC WFS. Its in a tab on the usual
summary pages. |
|
|
17190
|
Thu Oct 13 23:52:45 2022 |
Koji | Update | IMC | IMC ASC: summary pages and notes | The output matrices have been calculated
on Aug 4, 2022 by me. [40m
ELOG 17060] |
|
|
14818
|
Tue Jul 30 20:11:12 2019 |
rana | Summary | IMC | IMC ASC: thoughts and hopes | One of the
biggest challenges in LIGO is reducing the
alignment control noise. |
|
|
17872
|
Mon Sep 25 15:32:57 2023 |
JC | Update | IOO | IMC Alignment After C1Sus2 Crash This Morning | [Paco, Murtaza, JC]
Fixed C1SUS2 Crash from this morning
|
|
|
12820
|
Fri Feb 10 18:21:21 2017 |
gautam | Update | IMC | IMC Demod board | Rana and I spent some time looking at the
IMC demod board earlier today. I will post
the details shortly, but there was a label |
|
|
12821
|
Fri Feb 10 19:32:15 2017 |
Koji | Update | IMC | IMC Demod board | The input impedance of the mixer is not
constant. As the diode switches, it changes
dynamically. Because of this, the waveform |
|
|
17242
|
Tue Nov 8 10:35:26 2022 |
Anchal | Update | SUS | IMC F2A test | This time the test was succesful but I
have reverted MC3 f2a filters back to with
Q=3, 7, and 10. The inital part of the test |
|
|
16089
|
Wed Apr 28 10:56:10 2021 |
Anchal, Paco | Update | SUS | IMC Filters diagnosed | Good
morning! |
7x |
|
15902
|
Thu Mar 11 08:13:24 2021 |
Paco, Anchal | Update | SUS | IMC First Free Swing Test failed due to typo, restarting now | [Paco, Anchal]
The triggered code went on at 5:00
am today but a last minute change I made |
|
|
16679
|
Thu Feb 24 19:26:32 2022 |
Anchal | Update | General | IMC Locking | I think I have aligned the cavity, including
MC1 such that we are seeing flashing of fundamental
mode and significant transmission sum value |
|
|
17748
|
Wed Aug 2 17:17:37 2023 |
Koji | Update | PSL | IMC Locking (FIXED: Remote switching of PSL shutter is not working) | After the exploration of c1psl, the IMC
locking was not functioning well. It looked
like the MC autolocker issue. |
|
|
16685
|
Sun Feb 27 00:37:00 2022 |
Koji | Update | General | IMC Locking Recovery | Summary:
- IMC was locked.
- Some alignment change in the output |
|
|
17360
|
Thu Dec 15 08:37:52 2022 |
JC | Update | Daily Progress | IMC Misalignment | PMC seems to have gotten very misaligned
over the last 12 hours. I'm going in
to align now. |
|
|
11795
|
Sat Nov 21 00:46:33 2015 |
Koji | Update | IOO | IMC OLTF | Here is the comparison before and after
the fix.
Before the work, the UGF was ~40kHz. |
|
|
11798
|
Sun Nov 22 12:12:17 2015 |
Koji | Update | IOO | IMC OLTF | Well. I thought a bit more and now I think
it is likely that this is just the servo
bump as you can see in the closed-loop TF. |
|
|
17194
|
Mon Oct 17 17:42:35 2022 |
JC | HowTo | OPLEV Tables | IMC Reflected beam sketch | I sketched up a quick drawing with estimated
length for the IMC reflected beam. This includes
the distances and focal length. Distances |
|
|
7256
|
Thu Aug 23 12:17:39 2012 |
Manasa | Update | | IMC Ringdown | The ringdown measurements are in progress.
But it seems that the MC mirrors are getting
kicked everytime the cavity is unlocked by |
|
|
7257
|
Thu Aug 23 15:35:33 2012 |
rana | Update | | IMC Ringdown |
It is HIGHLY unlikely
that the IMC mirrors are having any effect |
|
|
7260
|
Thu Aug 23 17:51:25 2012 |
Manasa | Update | | IMC Ringdown |
|
|
|
15183
|
Mon Feb 3 13:54:10 2020 |
Yehonathan | Update | IOO | IMC Ringdowns extended data analysis | I extended the ringdown data analysis to
the reflected beam following Isogai
et al. |
|
|
15190
|
Wed Feb 5 21:13:17 2020 |
Yehonathan | Update | IOO | IMC Ringdowns extended data analysis | I translate the results obtained in the
previous elog to the IMC 3 mirror cavity.
I assume the loss in each mirror in the IMC |
|
|
15175
|
Wed Jan 29 12:40:24 2020 |
Yehonathan | Update | IOO | IMC Ringdowns preliminary data analysis | I analyze the IMC ringdown data from last
night.
Attachment 1 shows the normalized |
|
|
15912
|
Fri Mar 12 11:44:53 2021 |
Paco, Anchal | Update | training | IMC SUS diagonalization in progress | [Paco, Anchal]
- Today we spent the morning shift
debugging SUS input matrix diagonalization. |
|
|
15258
|
Fri Mar 6 01:12:10 2020 |
gautam | Update | Electronics | IMC Servo IN2 path looks just fine | It seems like the AO path gain
stages on the IMC Servo board work just fine.
The weird results I reported earlier |
|
|
15257
|
Thu Mar 5 19:51:14 2020 |
gautam | Update | Electronics | IMC Servo board being tested | I am running some tests on the IMC servo
board with an extender card so |
|
|
16174
|
Wed Jun 2 09:43:30 2021 |
Anchal, Paco | Summary | SUS | IMC Settings characterization | Plot description:
We
picked up three 10 min times belonging to
the three different configurations:
'Old |
|
|
16102
|
Thu Apr 29 18:53:33 2021 |
Anchal | Update | SUS | IMC Suspension Damping Gains Test | With the input matrix, coil ouput gains
and F2A filters loaded as in 16091,
I tested the suspension loops' step response |
|
|
16110
|
Mon May 3 16:24:14 2021 |
Anchal | Update | SUS | IMC Suspension Damping Gains Test Repeated with IMC unlocked | We repeated the same test with IMC unlocked.
We had found these gains when IMC was unlocked
and their characterization needs to be done |
|
|
16175
|
Wed Jun 2 16:20:59 2021 |
Anchal, Paco | Summary | SUS | IMC Suspension gains reverted to old values | Following the conclusion, we are reverting
the suspension gains to old values, i.e.
|
|
|
16094
|
Thu Apr 29 10:52:56 2021 |
Anchal | Update | SUS | IMC Trans QPD and WFS loops step response test | In 16087
we mentioned that we were unable to do a
step response test for WFS loop to get an |
|
|
15215
|
Sat Feb 15 12:56:24 2020 |
Yehonathan | Update | IOO | IMC Transfer function measurement | {Yehonathan, Meenakshi}
We measure the IMC transfer function
using SR785. |
|
|
11529
|
Tue Aug 25 16:09:54 2015 |
ericq | Update | IOO | IMC Tweak | A little more information about the IMC
loop tweak...
I increased the overall IMC loop |
|
|
11538
|
Fri Aug 28 19:05:53 2015 |
rana | Update | IOO | IMC Tweak | Well, green looks better than blue, but
it makes the PCDRIVE go high, which means
its starting to saturate the EOM drive. So |
|
|
15318
|
Tue May 5 23:44:14 2020 |
gautam | Update | ASC | IMC WFS | Summary:
I've been thinking about the
IMC WFS. I want to repeat the sort of analysis |
|
|
15320
|
Thu May 7 09:43:21 2020 |
rana | Update | ASC | IMC WFS | This
is the doc from Keita Kawabe on why the
WFS heads should be rotated. |
|
|
15321
|
Thu May 7 10:58:06 2020 |
gautam | Update | ASC | IMC WFS | OK so the QPD segments are in the "+"
orientation when the 40m IMC WFS heads are
mounted at 45 deg. I thought "+" |
|
|
16990
|
Tue Jul 12 09:25:09 2022 |
rana | Update | IOO | IMC WFS | MC WFS
Demod board needs some attention. |
|
|
17177
|
Fri Oct 7 20:00:46 2022 |
Koji | Update | IOO | IMC WFS / MC2 SUS glitch | After the CDS upgrade team called for a
day (their work TBD), I took over the locked
IMC to check how it looked like. |
|
|
17179
|
Sun Oct 9 13:49:49 2022 |
Koji | Update | IOO | IMC WFS / MC2 SUS glitch | The IMC and the IMC WFS kept running for
~2days. 👍
I wanted to look at the trand of |
|
|
17180
|
Mon Oct 10 00:05:24 2022 |
Chris | Update | IOO | IMC WFS / MC2 SUS glitch | Thanks for pointing out that EPICS data
collection (slow channels) was not working.
I started the service that collects these |
|
|
12641
|
Sat Nov 26 19:16:28 2016 |
Koji | Update | IOO | IMC WFS Demod board measurement & analysis | [Rana, Koji]
1. The response of the
IMC WFS board was measured. The |
|