| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
15208
|
Wed Feb 12 12:13:37 2020 |
gautam | Update | LSC | AO path attempts | Summary:
The
PRFPMI can be controlled by a mix of ALS |
|
|
15903
|
Thu Mar 11 14:03:02 2021 |
gautam | Update | LSC | AO path | There is some evidence of weird saturation
but the gain balancing (0.8dB) and orthogonality
(~89 deg) for the daughter board on the REFL11 |
|
|
10855
|
Mon Jan 5 23:36:47 2015 |
ericq | Update | IOO | AO cable reconnected |
|
|
|
11163
|
Tue Mar 24 05:05:09 2015 |
ericq | Update | LSC | AO Path engaged | [J, Q]
Terse tonight, more verbose tomorrow.
We have succesfully achieved multiple |
|
|
11167
|
Tue Mar 24 18:22:11 2015 |
ericq | Update | LSC | AO Path engaged | For increased flatness of the AO response,
and thus less gain peaking in the CARM loop,
I reccomend turning down the MC servo VCO |
|
|
11168
|
Tue Mar 24 18:47:10 2015 |
ericq | Update | LSC | AO Path engaged | Jenne has more detailed notes about how
things went down last night, but I figure
I should write about how we got the |
|
|
17325
|
Wed Nov 30 14:25:34 2022 |
Tega | Update | CDS | AMD display driver installation | After swapping out the HDD on donatella,
I noticed that the display resolution was
stuck on 700x400 and could not be changed. |
|
|
15206
|
Tue Feb 11 16:39:00 2020 |
shruti | Update | ALS | AM/PM | The results of the AM/PM measurements:
Attachment 1: Traces
of 9 AM TFs overlaid on top of each other, |
|
|
6018
|
Sat Nov 26 19:07:40 2011 |
kiwamu | Summary | Green Locking | AM trnasfer function of the Y end laser with doublin crystal |
|
|
|
5472
|
Mon Sep 19 23:19:40 2011 |
Keiko | Update | IOO | AM modulation mistery | Keiko, Anamaria
We started to investigate the AM
modulation mistery again. Checking just after |
|
|
5491
|
Tue Sep 20 23:01:37 2011 |
Keiko | Update | IOO | AM modulation mistery | Keiko, Suresh
AM modulations are still there ... the |
|
|
5502
|
Wed Sep 21 16:44:18 2011 |
Keiko | Update | IOO | AM modulation mistery | AM
modulation depths are found to be 50 times smaller |
|
|
5520
|
Thu Sep 22 17:29:42 2011 |
Keiko | Update | IOO | AM modulation mistery | AM
modulation will add offset on SRCL signal
as well as PRCL signal. About 2% of the signal |
|
|
5538
|
Sat Sep 24 09:55:42 2011 |
Keiko | Update | IOO | AM modulation mistery | From the night day before yesterday (Sep
22nd, Thursday night. Sorry for my late update),
there |
|
|
5503
|
Wed Sep 21 17:42:35 2011 |
rana | Update | IOO | AM modulation misery | I'd like to see some |
|
|
5504
|
Wed Sep 21 18:53:03 2011 |
Keiko | Update | IOO | AM modulation misery | The signal
offset due to the AM modulation is estimated
by a simulation for PRCL for |
|
|
5506
|
Wed Sep 21 21:13:35 2011 |
rana | Update | IOO | AM modulation misery | How about changing the x-axis of all these
plots into meters or picometers and tell
us how wide the PRC resonance is? (something |
|
|
5763
|
Sat Oct 29 22:57:03 2011 |
Mirko | Update | LSC | AM modulation due to non-optimal SB frequency | [Kiwamu, Mirko]
Non-optimal 11MHz SB frequency causes
PM to be transformed into AM. |
|
|
5774
|
Tue Nov 1 13:41:38 2011 |
Mirko | Update | LSC | AM modulation due to non-optimal SB frequency |
|
|
|
3603
|
Thu Sep 23 23:24:43 2010 |
rana, johnny, tara | Summary | PSL | AM modulate AOM to measure RefCav Thermo-Optic coefficient | Big Johnny and I hacked a function
generator output into the cross-connect of
the 80 MHz VCO driver so that we could modulate |
|
|
14979
|
Fri Oct 18 20:21:33 2019 |
shruti | Update | ALS | AM measurement attempt at X end | [Shruti, Rana]
- At the X end, we set up the network
analyzer to begin measurement of the AM transfer |
|
|
15020
|
Thu Nov 7 17:46:10 2019 |
shruti | Update | ALS | AM measurement at X end | Some details:
- There
was a SR560+SR785 (not connected for measurement)
placed near the X end which I moved; it is |
|
|
5249
|
Tue Aug 16 16:59:20 2011 |
Anamaria | Update | RF System | AM in the PM | Kiwamu, Keiko, Anamaria
Looking at the I and Q signals coming
from REFL11 and REFL55 we saw large offsets, |
|
|
15197
|
Fri Feb 7 09:45:03 2020 |
shruti | Update | General | AM at X end | I took a few AM TF measurements at the
X end for which I:
Misaligned the ITMX (then |
|
|
5588
|
Fri Sep 30 17:40:03 2011 |
kiwamu | Update | IOO | AM / PM ratio | [Mirko / Kiwamu]
We have |
|
|
5606
|
Mon Oct 3 20:02:59 2011 |
Suresh | Update | PSL | AM / PM ratio | [Koji, Suresh]
In the previous measurement, the
PDA 255 had most probably saturated at DC, |
|
|
5616
|
Tue Oct 4 16:58:45 2011 |
Suresh | Update | PSL | AM / PM ratio | Correction: Koji noted that Mirko
actually reports a PM modulation index of
0.17 for the 11 MHz sideband ( |
|
|
7007
|
Mon Jul 23 18:41:15 2012 |
Jamie | Update | Green Locking | ALS_END.mdl model added for end station green ALS channels | The end sus models (c1scx and c1scy) both
contain some ALS stuff. This stuff
could maybe be moved to their own models, |
|
|
7009
|
Mon Jul 23 19:00:26 2012 |
Koji | Update | Green Locking | ALS_END.mdl model added for end station green ALS channels | This is a good modification. We just need
to check how the ALS scripts are affected.
|
|
|
11803
|
Mon Nov 23 23:42:56 2015 |
ericq | Update | LSC | ALSY recovered | [ericq, gautam]
Gautam couldn't observe a Y
green beatnote earlier, so we checked |
|
|
11804
|
Tue Nov 24 01:14:23 2015 |
Koji | Update | LSC | ALSY recovered | Sorry, I completely forgot to turn the
Marconi on... |
|
|
11931
|
Thu Jan 14 02:33:37 2016 |
ericq | Update | LSC | ALSX Noise still anomalously high | [ericq, Gautam]
We checked the UGF of the AUX X
PDH servo, found a ~6kHz UGF with ~45 degree |
|
|
11937
|
Tue Jan 19 17:54:39 2016 |
gautam | Update | LSC | ALSX Noise still anomalously high | While carrying out my end-table power investigations,
I decided to take a quick look at the out-of-loop
ALSX noise - see the attached plot. The feature |
|
|
11334
|
Thu May 28 21:10:46 2015 |
Koji | Update | Green Locking | ALS-X noise hunting | I have been looking at the X-end ALS setup.
I was playing with the control bandwidth
to see the effect to the phase tracker output |
|
|
8667
|
Mon Jun 3 22:36:07 2013 |
rana | Update | LSC | ALS-TRY_OUT needs anti-whitening | After
working some more on the EY table, we are |
|
|
8671
|
Tue Jun 4 16:04:34 2013 |
Annalisa | Update | LSC | ALS-TRY_OUT needs anti-whitening |
|
|
|
8679
|
Wed Jun 5 14:43:42 2013 |
Annalisa | Update | LSC | ALS-TRY_OUT DQ channels |
|
|
|
11467
|
Thu Jul 30 14:27:18 2015 |
Eve | Update | Summary Pages | ALS, ASC, LSC Summary Pages | I've switches the ALS, ASC, and LSC
plots on the summary pages from plotting
raw frames, to plotting minute trends, instead. |
|
|
12105
|
Thu May 5 03:05:37 2016 |
gautam | Update | endtable upgrade | ALS status update | [ericQ, gautam]
Today we spent some time looking
into the PDH situation at the X end. A summary |
|
|
12108
|
Thu May 5 14:05:01 2016 |
rana | Update | endtable upgrade | ALS status update | All seems very fishy. Its not good to put
attenuators and filters in nilly-willy.
Once the post-PD bandpass |
|
|
9228
|
Wed Oct 9 22:58:34 2013 |
Manasa | Update | Green Locking | ALS stabilization | After Jenne and Masayuki told that they
were not able to stabilize the ALS for either
arms yesterday, I looked into things with |
|
|
14486
|
Mon Mar 18 20:22:28 2019 |
gautam | Update | ALS | ALS stability test | I'm running a test to see how stable
the EX green lock is. For this purpose, I've
left the slow temperature tuning servo on |
|
|
10302
|
Thu Jul 31 01:08:54 2014 |
Koji | Update | LSC | ALS stability check | - ALS X/Y arm stability was checked by
IR locked arms.
- Basically the stability looks same |
|
|
13600
|
Fri Feb 2 13:16:55 2018 |
gautam | Update | ALS | ALS signals whitening switching | While setting up for this measurement,
I noticed something odd with the whitening
switching for the ALS channels. For the usual |
|
|
13595
|
Wed Jan 31 22:32:11 2018 |
gautam | Update | ALS | ALS signal chain + power budget | Summary:
|
|
|
13597
|
Thu Feb 1 15:31:12 2018 |
gautam | Update | ALS | ALS signal chain + power budget | Summary:
A |
|
|
13613
|
Wed Feb 7 10:16:26 2018 |
gautam | Update | ALS | ALS signal chain + power budget | After emailing the technical team at Menlo,
I have uploaded the more detailed information
they have given me on our wiki. |
|
|
9183
|
Tue Oct 1 17:14:53 2013 |
masayuki | Update | Green Locking | ALS servo filters modified |
[Manasa, Masayuki]
|
|
|
8792
|
Wed Jul 3 01:49:46 2013 |
Annalisa | Update | Green Locking | ALS servo configuration | [Koji, Annalisa, Manasa]
Today we worked on the ALS servo
stabilization for the Y arm. |
|
|
8793
|
Wed Jul 3 03:06:29 2013 |
Annalisa | Update | Green Locking | ALS servo configuration |
I realized that I cannot open the
attached plots. I'll fix them tomorrow. |
|