| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
4510
|
Mon Apr 11 14:17:22 2011 |
josephb, jamie | Update | CDS | Frame wiper script installed | [Joe, Jamie, Alex]
Fixes:
I
asked Alex which cron to use (dcron? frcron?). |
|
|
4109
|
Wed Jan 5 00:23:30 2011 |
rana | Summary | DAQ | FrameBuilder fails in a new way | Since Leo was trying to demo his LIGO Data
Listener code, he noticed that there was
and NDS2 issue. The NDS2 guy (JZ) noticed |
|
|
4112
|
Wed Jan 5 16:00:11 2011 |
rana, alex | Summary | DAQ | FrameBuilder fails in a new way | Email from Alex:
|
|
|
4115
|
Wed Jan 5 22:14:41 2011 |
rana | Summary | DAQ | FrameBuilder fails in a new way | Just a proof that the DAQ is working -
ran DTT on nodus from 3 hours ago. |
|
|
14356
|
Thu Dec 13 22:56:28 2018 |
gautam | Update | CDS | Frames | [koji, gautam]
We looked into the /frames situation
a bit tonight. Here is a summary: |
|
|
4319
|
Thu Feb 17 23:41:46 2011 |
rana | Frogs | DAQ | Frames Directory got the wrong name: Data unreachable | DTT stopped working for recent data. An
'ls' in the frames/full/ directory reveals:
drwxr-xr-x 2 controls controls |
|
|
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 |
|
|
9159
|
Wed Sep 25 17:07:08 2013 |
rana | Frogs | Treasure | Free Green Mango Juice in fridge | |
|
|
5344
|
Tue Sep 6 17:43:01 2011 |
Suresh | Update | IOO | Free Swing ITMY started | Free swing of ITMY started at
Tue Sep 6 17:41:43 PDT 2011
|
|
|
5347
|
Tue Sep 6 17:56:53 2011 |
Jenne | Update | IOO | Free Swing ITMY started |
|
|
|
2391
|
Thu Dec 10 17:13:36 2009 |
kiwamu | Update | SUS | Free swiging spectra under the atmospheric pressure | The free swinging spectra of ITMs, ETMs,
BS, PRM and SRM were measured last night
in order to make sure that nothing wrong |
|
|
12523
|
Thu Sep 29 16:19:29 2016 |
Lydia | Update | SUS | Free swing eigenmodes | [Lydia, Teng]
Motivated by the strange pitch/yaw
coupling behavior we ran into while doing |
|
|
836
|
Thu Aug 14 19:08:14 2008 |
Yoichi | Configuration | SUS | Free swing measurement going on | I started free swinging spectra measurement
of all the suspensions now Aug 14 19:05 (PDT).
The watch dogs are all shutdown. Please do |
|
|
9113
|
Thu Sep 5 15:18:41 2013 |
Jenne | Update | LSC | Free swinging DRMI power buildups | I have the DRMI free swinging right now,
since it's not really locking. Looking
at these time series in the attached pdf, |
|
|
807
|
Thu Aug 7 10:07:13 2008 |
Yoichi | Update | SUS | Free swinging OSEM spectra | Looks like there are more extra peaks in the
SRM than other optics.
Maybe because it is closer to the door ? |
|
|
808
|
Thu Aug 7 10:27:59 2008 |
rana | Update | SUS | Free swinging OSEM spectra | Sometimes we see extra peaks in the OSEM spectra
coming from a beat between the regular eigenmodes.
This probably comes from the OSEM shadow |
|
|
2363
|
Tue Dec 8 03:53:49 2009 |
kiwamu | Update | SUS | Free swinging spectra of ETMX | In this night, I checked the free swinging
spectra of ETMX to make sure nothing wrong
with ETMX by the wiping. |
|
|
7078
|
Thu Aug 2 11:09:52 2012 |
Eric | Summary | LSC | Free-Swinging Michelson Measurements | To take the free swinging Michelson measurements
for the interferometer calibration Jamie
aligned the beam splitter with ITMX and ITMY. |
|
|
5266
|
Fri Aug 19 01:15:22 2011 |
Suresh | Update | SUS | FreeSwing all optics | I ran "freeswing all" at Fri
Aug 19 01:09:28 PDT 2011 (997776583)
and "opticshutdown" as well. |
|
|
11640
|
Thu Sep 24 17:01:37 2015 |
ericq | Update | Computer Scripts / Programs | Freeing up some space on /cvs/cds | I noticed that Chiara's backup HD (which
has a capacity of 1.8TB, vs the main drives
2TB) was near to getting full, meaning that |
|
|
5353
|
Wed Sep 7 00:44:51 2011 |
Jenne | Update | SUS | Freeswing all | I just started a freeswing all,
as a final check before we pump:
|
|
|
16872
|
Tue May 24 15:21:13 2022 |
Anchal | Update | BHD | Freeswing tests of new SOS started | I modified the script freeSwing.py
to use damping loop output switches to free
the optic instead of watchdog or coil output |
|
|
15711
|
Sat Dec 5 20:44:35 2020 |
gautam | Update | ASC | Freq Gen Box re-installed | This work is now complete. The box was
characterized and re-installed in 1X2. I
am able to (briefly) lock the IMC and see |
6x |
|
15710
|
Fri Dec 4 22:41:56 2020 |
gautam | Update | ASC | Freq Gen Box revamp | This turned out to be a much more involved
project than I expected. The layout is complete
now, but I found several potentially damaged |
|
|
4239
|
Wed Feb 2 10:44:26 2011 |
Koji | Summary | Green Locking | Freq fluctuation measured by the freq divider and Rana's analog PFD | The freq fluctuation of the beat note
has been measured with the following condition
The IR beam only locked |
|
|
4240
|
Wed Feb 2 12:55:34 2011 |
Koji | Summary | Green Locking | Freq fluctuation measured by the freq divider and Rana's analog PFD | I found that some flakiness of the beat
signals comes from the RF components for
the beat detection. |
|
|
3565
|
Mon Sep 13 11:40:50 2010 |
Alberto | Update | Electronics | Frequency Box Documentation Added to the SVN | I uploaded all the material about the RF
frequency Generation Box into the SVN under
the path: |
|
|
3572
|
Tue Sep 14 18:07:41 2010 |
Alberto | Update | Electronics | Frequency Box Documentation Added to the SVN | I completed a LIGO document describing
design, construction and characterization
of the RF System for the 40m upgrade. |
|
|
10008
|
Mon Jun 9 09:51:11 2014 |
Sai Akhil | Update | Electronics | Frequency Error Measurement of UFC-6000 RF Frequency Counter | Motivation:
To test the
precision of Mini-Circuits Model UFC-6000 |
|
|
3552
|
Thu Sep 9 12:02:03 2010 |
Alberto | Update | Electronics | Frequency Generation Box - Amplitude Noise Measurements | I measured the amplitude noise of the source
outputs and the EOM outputs of the Frequency
Generation box. |
|
|
3530
|
Tue Sep 7 08:56:00 2010 |
Alberto | Update | Electronics | Frequency Generation Box Assembly - Phase Noise Measurements | Here are the results of my phase noise
measurements on the 7 outputs of the Frequency
Generation Box. (BIN=95L applied by DTT). |
|
|
3450
|
Fri Aug 20 16:41:43 2010 |
Alberto | Update | Electronics | Frequency Generation Box Assembly Completed | I finished assembling the frequency generation
unit for the upgrade. I tested it through
to check that the power levels are as expected |
7x |
|
468
|
Thu May 8 01:07:24 2008 |
rana | Summary | LSC | Frequency Noise test: MC Trans Backscatter | [COLOR=purple][SIZE=4][FONT=Arial]There is
a wandering hump in the MC_F spectrum.[/FONT][/SIZE][/COLOR]
It can move around on the time
|
|
|
10760
|
Sun Dec 7 13:11:57 2014 |
manasa | Summary | General | Frequency Offset Locking - To Do List | Attached is the timeline for Frequency
Offset Locking related activities. All activities
will be done mostly in morning and early |
|
|
10791
|
Fri Dec 12 14:38:39 2014 |
manasa | Summary | General | Frequency Offset Locking - To Do List (Revised) | Unfortunately the order placed for beam
samplers last week did not go through. These
will be used at the X and Y end tables to |
|
|
10779
|
Thu Dec 11 12:39:31 2014 |
diego | Update | Computer Scripts / Programs | Frequency Offset Locking scripts status | I finished the polishing in the scripts/FOL directory, |
|
|
1744
|
Tue Jul 14 16:31:46 2009 |
Clara | Update | PEM | Frequency Response of Microphone (Bonnie) | So, I actually took these measurements
last week, but I didn't get around to making
nice plots and things until now. I figured |
|
|
79
|
Wed Nov 7 14:01:31 2007 |
waldman | Omnistructure | OMC | Frequency and Intensity noise | One of the biggest problems I had using the
PZT to lock was excessive noise. I did a
little noise hunting and found that the problem |
|
|
9200
|
Fri Oct 4 01:09:33 2013 |
Manasa | Update | Green Locking | Frequency counter for ALS | I checked the BK precision 1856D manual.
I found that although this frequency counter |
|
|
11736
|
Thu Nov 5 03:04:13 2015 |
gautam | Update | CDS | Frequency counting - systematics and further changes | I've
made a few more changes to the frequency
counting code - these are mostly details |
|
|
11709
|
Fri Oct 23 18:36:48 2015 |
gautam | Update | CDS | Frequency counting - workable setup prepared | I've
made quite a few changes in the software
as well as the hardware of the digital frequency |
|
|
11710
|
Fri Oct 23 19:27:19 2015 |
Koji | Update | CDS | Frequency counting - workable setup prepared | It is a nice scan. I'm still thinking
about the equivalence of the moving average
and the FIR low pass that I have mentioned |
|
|
11712
|
Sat Oct 24 12:34:43 2015 |
gautam | Update | CDS | Frequency counting - workable setup prepared | Sorry for the confusion - I did mean Green
beat frequency, and I had neglected the
factor of 2 in my earlier calculations. However, |
|
|
11615
|
Thu Sep 17 19:58:06 2015 |
gautam | Summary | Computer Scripts / Programs | Frequency counting algorithm | I made some changes to the c1tst model
running on c1iscey in order to test my algorithm
for frequency counting. I followed the steps |
|
|
11628
|
Mon Sep 21 18:31:06 2015 |
gautam | Summary | Computer Scripts / Programs | Frequency counting algorithm | I have been
working on setting up a frequency counting
module that can give us a readout of the |
6x |
|
11629
|
Mon Sep 21 23:18:55 2015 |
ericq | Summary | Computer Scripts / Programs | Frequency counting algorithm | I definitely think lowpassing the output
is the way to go. Since this frequency readback
will be used for slow control of the beatnote |
|
|
11631
|
Tue Sep 22 02:11:17 2015 |
rana | Summary | Computer Scripts / Programs | Frequency counting algorithm | I was going to suggest using a software
PLL, but perhaps averaging gives the same
result. The same ADC signal can be fed to |
|
|
11704
|
Tue Oct 20 17:36:01 2015 |
gautam | Update | CDS | Frequency counting with moving average | I'm working on setting up a moving-average
in the custom C code block that counts the
zero crossings to see if this approach is |
|
|
11647
|
Tue Sep 29 03:14:04 2015 |
gautam | Update | CDS | Frequency divider box | Earlier today, the front panels for the
1U chassis I obtained to house the Wenzel
dividers + RF amplifiers arrived, which meant |
|
|
11684
|
Mon Oct 12 17:04:02 2015 |
gautam | Update | CDS | Frequency divider box - further tests | I carried out some more tests on the digital
frequency counting system today, mainly to
see if the actual performance mirrors the |
|