| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
13234
|
Mon Aug 21 16:35:48 2017 |
gautam | Update | VAC | UPS checkup | [steve, gautam]
At Rolf/Rich Abbott's request,
we performed a check of the UPS today. |
|
|
13236
|
Mon Aug 21 21:26:41 2017 |
gautam | Summary | General | Loss measurements plan | In case you want to use it, I had profiled
the Lightwave NPRO sometime back, and
we were even using it as the AUX X laser |
|
|
13237
|
Mon Aug 21 23:38:55 2017 |
gautam | Update | ALS | ALS out-of-loop noise | I worked a little bit on the Y arm ALS
today.
Started by locking the |
|
|
13238
|
Tue Aug 22 02:19:11 2017 |
gautam | Update | ALS | ALS OLTFs | Attachment #1 shows the
results of my measurements tonight (SR785
data in Attachment #2). |
|
|
13240
|
Tue Aug 22 15:40:06 2017 |
gautam | Update | Computers | Old frames accessible again | [jamie, gautam]
I had some trouble getting the
daqd processes up and running again using |
|
|
13242
|
Tue Aug 22 17:11:15 2017 |
gautam | Update | Computers | c1iscex model restarts | [jamie, gautam]
We tried to implement the fix
that Rolf suggested in order to solve (perhaps |
|
|
13243
|
Tue Aug 22 18:36:46 2017 |
gautam | Update | Computers | All FE models compiled against RCG3.4 | After getting the go ahead from Jamie,
I recompiled all the FE models against the
same version of RCG that we tested on the |
|
|
13246
|
Wed Aug 23 17:22:36 2017 |
gautam | Update | ALS | Fiber ALS - reinstalled | I completed the revamp of the box, and
re-installed the box on the PSL table today.
I think it would be ideal to install this |
|
|
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 |
|
|
13249
|
Thu Aug 24 17:36:11 2017 |
gautam | Update | CDS | FSS Slow Python maintenance | A couple of weeks ago, I was trying to
modernize the python version of the FSS Slow
temperature control loops, when I accidentally |
|
|
13252
|
Fri Aug 25 01:20:52 2017 |
gautam | Update | LSC | DRMI locking attempt | I tried some DRMI |
|
|
13253
|
Fri Aug 25 11:11:26 2017 |
gautam | Update | General | MC1 kicked again | Looks like MC1 got another big kick just
under 4 hours ago. None of the other optics
show any evidence of a glitch so it seems |
|
|
13254
|
Fri Aug 25 15:54:14 2017 |
gautam | Update | ALS | Fiber ALS noise measurement | [Kira, gautam]
Attachment #1 - Photo
of the revamped beat setup. The top panel |
|
|
13262
|
Mon Aug 28 16:20:00 2017 |
gautam | Update | CDS | 40m files backup situation | This elog is meant
to summarize the current backup situation |
|
|
13265
|
Tue Aug 29 01:52:22 2017 |
gautam | Update | SUS | Test mass actuator calibration | [ericq, gautam]
Tonight, |
|
|
13266
|
Tue Aug 29 02:08:39 2017 |
gautam | Update | ALS | Fiber ALS noise measurement | I was having a chat with EricQ about this
today, just noting some points from our discussion
down here so that I remember to look into |
|
|
13267
|
Tue Aug 29 15:04:59 2017 |
gautam | Update | SUS | ETMY Oplev PIT loop gain changed | Last night, while we were working on the
ALS, I noticed the GTRY spot moving around
(in PITCH) on the CCD monitor in the control |
|
|
13273
|
Wed Aug 30 10:54:26 2017 |
gautam | Update | CDS | slow machine bootfest | MC autolocker and FSS loops were stuck
because c1psl |
|
|
13275
|
Wed Aug 30 15:00:06 2017 |
gautam | Update | General | Edgeswitch fiber swap | A couple of minutes ago, Larry W swapped
the fibers to our 40m Edgeswitch (BROCADE
FWS 648G) to a faster connection. This is |
|
|
13276
|
Wed Aug 30 19:49:33 2017 |
gautam | Update | LSC | REFL55 demod board debugging | Summary:
Today
I tried debugging the mysterious increase
in REFL55 signal levels in the DRMI configuration. |
|
|
13280
|
Thu Aug 31 00:52:52 2017 |
gautam | Update | LSC | REFL55 whitening board debugging | [rana,gautam] |
|
|
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. |
|
|
13282
|
Thu Aug 31 18:36:23 2017 |
gautam | Update | CDS | revisiting Acromag | Current
status:
There
is a single Acromag ADC unit installed in |
|
|
13283
|
Thu Aug 31 21:40:24 2017 |
gautam | Update | General | MC1 kicked again | There was a pretty large glitch in MC1
about an hour ago. The misalignment was so
large that the autolocker wasn't able |
|
|
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 |
|