| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
13286
|
Fri Sep 1 16:27:39 2017 |
gautam | Update | SUS | MC1 glitching | I re-enabled the MC SUS damping and IMC
locking for some IFO work just now.
|
|
|
13287
|
Fri Sep 1 16:55:27 2017 |
gautam | Update | Computers | Testpoints now accessible again | Thanks to |
|
|
13288
|
Fri Sep 1 19:15:40 2017 |
gautam | Update | ALS | Fiber ALS noise measurement | Summary:
I
did some work today to see if I could use |
|
|
13289
|
Mon Sep 4 16:30:06 2017 |
gautam | Update | LSC | Oplev loop tweaking | Now that the DRMI locking seems to be repeatable
again, I want to see if I can improve the
measured MICH noise. Recall |
|
|
13291
|
Tue Sep 5 02:07:49 2017 |
gautam | Update | LSC | Low Noise DRMI attempt | Summary:
Tonight, I was able |
|
|
13293
|
Tue Sep 5 14:41:58 2017 |
gautam | Update | CDS | NDS2 server restarted on megatron | I was unable to download data using nds2.
Gabriele had reported similar problems a
week ago but I hadn't followed up on |
|
|
13297
|
Tue Sep 5 23:02:37 2017 |
gautam | Update | CDS | slow machine bootfest | MC autolocker was not working - PCdrive was railed
at its upper rail for ~2 hours judging by |
|
|
13300
|
Wed Sep 6 23:06:30 2017 |
gautam | Update | LSC | Coil de-whitening switching investigation | Summary:
Rana
suggested checking if the coil de-whitening
switching is actually happening in the analog |
|
|
13312
|
Fri Sep 15 15:54:28 2017 |
gautam | Update | CDS | FB wiper script | A wiper script is not yet set up for our
new Frame-Builder. The disk usage is ~80% |
|
|
13313
|
Fri Sep 15 16:00:33 2017 |
gautam | Update | LSC | Sensing measurement | I've been working on analyzing the
data from the DRMI locks last week.
Here are the results of the sensing |
|
|
13314
|
Fri Sep 15 17:08:58 2017 |
gautam | Update | LSC | Coil de-whitening switching investigation | I downloaded a segment of data from the
time when the DRMI was locked with the BS
and ITM coil driver de-whitening switched |
|
|
13317
|
Mon Sep 18 17:17:49 2017 |
gautam | Update | CDS | FB wiper script | After trying to debug this issue using
the Perl debugger, I concluded that the problem
is in the part of the code that splits the |
|
|
13319
|
Mon Sep 18 17:51:26 2017 |
gautam | Update | CDS | FB wiper script | It is a little different - specifically,
the way the splitting of the output of the
"du" command into disk usage and |
|
|
13320
|
Mon Sep 18 18:40:34 2017 |
gautam | Update | CDS | FB wiper script | I did a further check on the wiper script
by changing the "percent_keep"
from 85.0 to 75.0, and running the script |
|
|
13324
|
Wed Sep 20 16:14:17 2017 |
gautam | Update | Equipment loan | Impedance test kit borrowed from Downs | I borrowed the HP impedance test kit from
Rich Abbott today. The purpose is to profile
the impedance of the NPRO PZTs, as part of |
|
|
13325
|
Thu Sep 21 01:32:00 2017 |
gautam | Update | ALS | AUX X Innolight AM measurement running | [rana,gautam]
We set up a measurement of the
AUX X laser AM today. Some notes: |
|
|
13327
|
Thu Sep 21 15:23:04 2017 |
gautam | Omnistructure | ALS | Long cable from LSC->IOO | [steve,gautam]
We laid out a 45m long BNC cable
from the LSC rack to the IOO rack via overhead |
|
|
13328
|
Fri Sep 22 18:12:27 2017 |
gautam | Update | LSC | DAC noise measurement (again) | I've been working on setting up some
scripts for measuring the DAC noise.
In all the DRMI noise budgets I've |
|
|
13331
|
Tue Sep 26 13:40:45 2017 |
gautam | Update | CDS | NDS2 server restarted on megatron | Gabriele reported problems with the nds2
server again. I restarted it again.
|
|
|
13332
|
Tue Sep 26 15:55:20 2017 |
gautam | Update | CDS | 40m files backup situation | Backups
of the root filesystems of |
|
|
13333
|
Tue Sep 26 19:10:13 2017 |
gautam | Update | ALS | Fiber ALS setup neatened | [steve, gautam]
The Fiber ALS box has been installed
on the existing shelf on the PSL table. We |
|
|
13335
|
Wed Sep 27 00:20:19 2017 |
gautam | Update | ALS | More AM sweeps | Attachment #1: Result
of AM sweeps with EX laser crystal at nominal
operating temperature ~ 31.75 C. |
|
|
13336
|
Wed Sep 27 22:25:21 2017 |
gautam | Update | LSC | DAC noise measurement (again) | Attachment
#1: Summary of results of measurements |
|
|
13337
|
Wed Sep 27 23:44:45 2017 |
gautam | Update | ALS | Proposed PM measurement setup | Attachment #1 is
a sketch of the proposed setup to measure
the PM response of the EX NPRO. Previously, |
|
|
13339
|
Thu Sep 28 10:33:46 2017 |
gautam | Update | CDS | 40m files backup situation | After consulting with Jamie, we reached
the conclusion that the reason why the root
of FB1 is so huge is because of the way the |
|
|
13341
|
Thu Sep 28 23:32:38 2017 |
gautam | HowTo | CDS | pyawg | I've modified the __init.py__
file located at /ligo/apps/linux-x86_64/cdsutils-480/lib/python2.7/site-packages/cdsutils/__init__.py |
|
|
13342
|
Thu Sep 28 23:47:38 2017 |
gautam | Update | CDS | 40m files backup situation | The nodus
backup too is now complete - however, |
|
|
13343
|
Thu Sep 28 23:50:04 2017 |
gautam | Update | LSC | DAC noise measurement (again) | I
am running some more measurements of the
DAC noise, for which I've shut down |
|
|
13345
|
Fri Sep 29 11:07:16 2017 |
gautam | Update | CDS | 40m files backup situation | The FB1 |
|
|
13347
|
Fri Sep 29 18:36:25 2017 |
gautam | Update | LSC | DAC noise measurement (again) | BS connections and damping restored.
|
|
|
13349
|
Mon Oct 2 18:08:10 2017 |
gautam | Update | CDS | c1ioo DC errors | I was trying to set up a DAC channel to
interface with the AOM driver on the PSL
table. |
|
|
13351
|
Mon Oct 2 19:03:49 2017 |
gautam | Update | CDS | [Solved] c1ioo DC errors | This did the trick - I simply ran
sudo |
|
|
13352
|
Mon Oct 2 23:16:05 2017 |
gautam | HowTo | Cameras | CCD calibration | Going through some astronomy CCD calibration
resources ([1]-[3]), |
|
|
13353
|
Tue Oct 3 01:32:39 2017 |
gautam | Update | LSC | Laser intensity noise coupling to MICH (simulated) | GV Oct 6: This
coupling is probably not correct - Finesse |
|
|
13355
|
Tue Oct 3 19:39:10 2017 |
gautam | Update | CDS | slow machine bootfest | Eurocrate key turning reboots for c1susaux, |
|
|
13356
|
Wed Oct 4 17:18:15 2017 |
gautam | Update | CDS | Free DAC channels in c1lsc | There are at least 5 free DAC channels
(4 if you discount the one channel from these
that I am hijacking) available in the 1Y2 |
|
|
13357
|
Wed Oct 4 17:38:25 2017 |
gautam | Update | LSC | FS725 for Marconi stabilization | I've located the Stanford Research
FS725 Rb reference unit. The question is
where to put it. This afternoon Steve and |
|
|
13359
|
Thu Oct 5 02:14:51 2017 |
gautam | Update | LSC | More DRMI coupling measurements - setup | In the end I decided to access the available
spare DAC channels via the C1ASS |
|
|
13360
|
Thu Oct 5 11:46:15 2017 |
gautam | Update | CDS | slow machine bootfest | MC Autolocker was umnhappy because c1iool0 |
|
|
13361
|
Thu Oct 5 13:58:26 2017 |
gautam | Update | CDS | 40m files backup situation | The 4TB HGST drives have arrived. I've
started the FB1 dd |
|
|
13362
|
Thu Oct 5 18:40:27 2017 |
gautam | Update | LSC | FS725 for Marconi stabilization | [steve, gautam]
We installed the FS725
on the shelf inside the PSL enclosure - see |
|
|
13364
|
Fri Oct 6 12:46:17 2017 |
gautam | Update | CDS | 40m files backup situation | Looks to have worked this time around.
|
|
|
13365
|
Fri Oct 6 12:56:40 2017 |
gautam | Summary | LSC | RTCDS NN | [gabriele, gautam]
Gabriele had prepared a C code
implementation of his NN for MICH/PRCL state |
|
|
13367
|
Mon Oct 9 01:29:26 2017 |
gautam | Update | LSC | DRMI Nosie Budget v3.0 | Summary:
I
spent this weekend doing a more careful investigation
of the DRMI noise. |
7x |
|
13369
|
Mon Oct 9 22:18:34 2017 |
gautam | Update | LSC | AS55Q Dark Noise | I measured the output voltage noise of
the Q output of the AS55 Demod Board with
the PSL shutter closed, using the SR785 (see |
|
|
13372
|
Wed Oct 11 14:42:03 2017 |
gautam | Update | LSC | AS55Q Dark Noise | I keep adding traces to this plot, here
is the most complete one I have now. Looks
like the input noise to the D040179 (measured |
|
|
13374
|
Wed Oct 11 19:31:32 2017 |
gautam | Update | LSC | AS55Q Dark Noise | I tried replacing the AD797s on the daughter
board with OP27s, and saw no significant
improvement in the electronics noise of the |
|
|
13376
|
Thu Oct 12 01:50:11 2017 |
gautam | Update | LSC | AS55Q Dark Noise | I worked on the daughter board a little
more in the evening. I have somehow managed
to make the dark noise ~25% worse [Attachment |
|
|
13378
|
Thu Oct 12 12:17:28 2017 |
gautam | Update | LSC | AS55Q Dark Noise | Here is the marked up schematic with the
board as it is stuffed. Annoyingly, there
is a capacitor (C1) which according to the |
|
|
13379
|
Thu Oct 12 14:42:45 2017 |
gautam | Update | CDS | slow machine bootfest | Steve reported problems getting the X arm
locked. Alignment sliders were inaccessible.
Eurocrate key turning reboots for |
|