| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
11578
|
Fri Sep 4 20:06:23 2015 |
rana | Update | LSC | DRMI locked on 1F and 3F | Nice going. I think the LLO / LHO scheme
is to acquire on 1F and then cdsutils avg
to get the 3F offsets. The thinking is that |
|
|
12619
|
Wed Nov 16 03:10:01 2016 |
gautam | Update | LSC | DRMI locked on 1f and 3f signals | After much trial and error with whitening
gains, demod phases and overall loop gains,
I was finally able to lock the DRMI |
|
|
12620
|
Wed Nov 16 08:14:43 2016 |
Steve | Update | LSC | DRMI locked on 1f and 3f signals | Nice job.
|
|
|
12630
|
Mon Nov 21 14:02:32 2016 |
gautam | Update | LSC | DRMI locked on 3f signals, arms held on ALS | Over the weekend, I was successful in locking
the DRMI with the arms held on ALS. The locks
were fairly robust, lasting order of minutes, |
|
|
6489
|
Thu Apr 5 07:19:16 2012 |
kiwamu | Update | LSC | DRMI locking | I
tried locking the DRMI to the signal-extraction
condition with the new trigger by AS110. |
|
|
10498
|
Fri Sep 12 00:40:23 2014 |
Jenne | Update | LSC | DRMI locking | Tonight I worked on DRMI locking.
I think the reason the May2014 DRMI |
|
|
10500
|
Fri Sep 12 11:25:42 2014 |
Koji | Update | LSC | DRMI locking | This is great.
And I got confused. Is REFL11 going
through the CM board? |
|
|
10501
|
Fri Sep 12 12:00:59 2014 |
ericq | Update | LSC | DRMI locking | REFL11 I, as seen in digital land, is connected
to the slow output of the CM board. I tuned
the demod angle of the REFL11 demodulator |
|
|
10502
|
Fri Sep 12 14:11:17 2014 |
ericq | Update | LSC | DRMI locking | We
need to get an interferometric estimation
of the SRC length error / SRC sideband splitting, |
7x |
|
10514
|
Wed Sep 17 15:40:00 2014 |
ericq | Update | LSC | DRMI locking | I have not had any success the past two
days in getting an interferometric measurement
of the SRC length. |
|
|
10527
|
Tue Sep 23 17:37:10 2014 |
ericq | Update | LSC | DRMI locking | Rather than using a CAD drawing, I used
Gabriele's code from ELOG
9590 to try and judge if we could |
|
|
12951
|
Wed Apr 26 01:00:23 2017 |
gautam | Update | General | DRMI locking | Since we'd like to get back to DRSE
locking, I tried locking the DRMI tonight.
I did the following: |
|
|
12954
|
Fri Apr 28 02:04:36 2017 |
gautam | Update | General | DRMI locking | I got a couple of ~30min long DRMI lock
stretches today. The settings I used are
essentially the same as what I had back in |
|
|
12955
|
Fri Apr 28 13:56:26 2017 |
rana | Update | General | DRMI locking | one of these signals does not look like
the others: explanation? |
|
|
12960
|
Mon May 1 16:29:51 2017 |
gautam | Update | General | DRMI locking | For the traces I posted, I had not turned
on the whitening for the SRCL sensing PD
(REFL55). However, I took a spectrum on a |
|
|
12962
|
Mon May 1 21:45:54 2017 |
ericq | Update | General | DRMI locking | Comparing counts doesn't get you anywhere;
each PD has different whitening gain which
may vary from measurement to measurement. |
|
|
12969
|
Wed May 3 18:45:45 2017 |
rana | Update | General | DRMI locking | [quote]Comparing counts doesn't get you anywhere;
each PD has different whitening gain which
may vary from measurement to measurement. |
|
|
12957
|
Fri Apr 28 19:32:06 2017 |
gautam | Update | General | DRMI locking - PRCL angular FF | I took a closer look at the POP QPD/ PRC
angular feedforward situation yesterday.
I thought it would be useful to have a |
|
|
14162
|
Tue Aug 14 02:01:12 2018 |
gautam | Update | LSC | DRMI locking - partial success | After tweaking the AS55 demod phase, SRM
alignment, triggering settings, I got a few
brief |
|
|
12972
|
Thu May 4 19:03:15 2017 |
gautam | Update | General | DRMI locking - preliminary MICH NB | Summary:
|
|
|
13088
|
Fri Jun 30 02:13:23 2017 |
gautam | Update | General | DRMI locking attempt | Summary:
I attempted to re-lock the DRMI
and try and realize some of the noise improvements |
|
|
13090
|
Fri Jun 30 11:50:17 2017 |
gautam | Update | General | DRMI locking attempt | Seems like the problem is actually with
ITMX
- the attached DV plots are for ITMX with |
|
|
13248
|
Thu Aug 24 00:39:47 2017 |
gautam | Update | LSC | DRMI locking attempt | Since the single arm locking and dither
alignment seemed to work alright after the
CDS overhaul, I decided to try some recycling |
|
|
13252
|
Fri Aug 25 01:20:52 2017 |
gautam | Update | LSC | DRMI locking attempt | I tried some DRMI |
|
|
13907
|
Thu May 31 23:12:17 2018 |
gautam | Update | LSC | DRMI locking attempt | Summary:
I wanted to recover the DRMI locking.
Among other things, Jon mentioned that his |
|
|
13933
|
Fri Jun 8 01:58:56 2018 |
gautam | Update | LSC | DRMI locking attempt again | Given the various changes to the IFO config
since last Thursday when I was last able
to lock the DRMI, I wanted to try once again |
|
|
13413
|
Tue Nov 7 22:56:21 2017 |
gautam | Update | LSC | DRMI locking recovered | I hadn't re-locked the DRMI after the
work on the AS55 demod board. Tonight, I
was able to recover the DRMI locking with |
|
|
14285
|
Wed Nov 7 23:07:11 2018 |
gautam | Update | LSC | DRMI locking recovered | I had some
success today. I hope that the tweaks I made
will allow working with the DRMI during the |
|
|
13908
|
Fri Jun 1 01:22:50 2018 |
gautam | Update | LSC | DRMI locking restored | As it happened last time, the problem apparently
fixed itself - somehow the act of me disconnecting
the cables and reconnecting them seems to |
|
|
13428
|
Wed Nov 15 01:37:07 2017 |
gautam | Update | LSC | DRMI low freq. nosie improved | Pianosa
just crashed and ate my elog, along with |
|
|
6474
|
Sat Mar 31 08:01:07 2012 |
kiwamu | Update | LSC | DRMI measurement | I have measured the sensing matrix of the
DRMI although the lock still doesn't stay
for a long time. |
|
|
13431
|
Thu Nov 16 00:53:26 2017 |
gautam | Update | LSC | DRMI noise sub-budgets | I've incorporated the functionality
to generate sub-budgets for the various grouped
traces in the NBs (e.g. the "A2L" |
|
|
4797
|
Wed Jun 8 23:17:25 2011 |
kiwamu | Update | LSC | DRMI output matrix diagonalization | Approximately
two weeks ago I diagonalized the LSC output
matrix for the DRMI locking. |
|
|
4592
|
Sat Apr 30 00:15:26 2011 |
kiwamu | Update | SUS | DRMI prep : suspension diagnostic | As a part of the DRMI preparation,
I leave all |
|
|
13093
|
Fri Jun 30 22:28:27 2017 |
gautam | Update | General | DRMI re-locked | Summary:
Reverted
to old settings, tried to reproduce DRMI
lock with settings as close to those used |
|
|
13094
|
Sat Jul 1 14:27:00 2017 |
Koji | Update | General | DRMI re-locked | Basically we use the arm cavities as the
reference of the beam alignment. The incident
beam is aligned such that the ITMY angle |
|
|
13281
|
Thu Aug 31 03:31:15 2017 |
gautam | Update | LSC | DRMI re-locked! | After our Demod/Whitening electronics investigations
suggested nothing obviously wrong, I decided
to give DRMI locking another go tonight. |
|
|
10690
|
Sat Nov 8 16:01:32 2014 |
ericq | Configuration | LSC | DRMI sensing | Here are some preliminary results from
the sensing sweeps I did the other night.
Notes: |
6x |
|
10693
|
Mon Nov 10 18:23:10 2014 |
ericq | Configuration | LSC | DRMI sensing | ARG, I accidentally permuted the digital
demod angles. This significantly weakens
the argument for believing AS55I is broken... |
|
|
9036
|
Mon Aug 19 23:08:31 2013 |
Jenne | Update | LSC | DRMI sensing signals | Here are a bunch of sensing signals.
The configuration is always DRMI. Except
for the optic noted in the title and the |
11x |
|
6512
|
Mon Apr 9 18:18:14 2012 |
kiwamu | Update | LSC | DRMI time series | Here is a time series when the DRMI is
being locked.
You can see that the AS110 goes up |
|
|
4760
|
Mon May 23 12:27:26 2011 |
kiwamu | Update | LSC | DRMI trial : details | (PRMI
locking with slightly misaligned SRM)
First I tried locking PRC and |
|
|
4757
|
Sat May 21 06:19:46 2011 |
kiwamu | Update | LSC | DRMI trial : no luck | I will try with POY55 that Koji prepared
today. |
|
|
4759
|
Mon May 23 00:36:51 2011 |
kiwamu | Update | LSC | DRMI trial : sucess | Eventually the
D |
|
|
11632
|
Tue Sep 22 03:48:18 2015 |
ericq | Update | LSC | DRMI tweaked, briefly held with ALS arms | Given the RF component power supply grounding,
POP110, POP22 and REFL165 all changed somewhat.
They have all been rephased for the DRMI, |
|
|
252
|
Tue Jan 22 02:33:45 2008 |
rob | Update | LSC | DRMI work |
0) The ETMY oplev needs work/centering
|
|
|
366
|
Mon Mar 10 02:05:08 2008 |
rob | Update | Locking | DRMI+2ARMs working better |
Some encouraging progress on the locking
front tonight. After the work on the DRM |
|
|
10859
|
Tue Jan 6 17:41:20 2015 |
Jenne | Configuration | CDS | DTT doesn't do envelopes?? | [Jenne, Diego]
We are working on trying out the
UGF servos, and wanted to take loop measurements |
|
|
2045
|
Fri Oct 2 18:04:45 2009 |
rob | Update | CDS | DTT no good for OMC channels | I took the output of the OMC DAC and plugged
it directly into an OMC ADC channel to see
if I could isolate the OMC DAC weirdness |
|
|
1718
|
Tue Jul 7 16:06:59 2009 |
Clara | Update | Computer Scripts / Programs | DTT synchronization errors, help would be appreciated | I am attempting to use the DTT program
to look at the coherence of the individual
accelerometer signals with the MC_L signal. |
|