| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
112
|
Fri Nov 16 14:31:43 2007 |
tobin | Update | Computers | op140 disks | Phil Ehrens stopped by and took op140's disks. |
|
|
117
|
Tue Nov 20 11:10:07 2007 |
tobin | Update | Computers | epics access from matlab | I installed "[url=http://www.slac.stanford.edu/~strauman/labca/]labca[/url]",
which allows [b]direct access to EPICS channels
from within Matlab[/b]. It comes with both |
|
|
118
|
Tue Nov 20 13:06:57 2007 |
tobin | Configuration | Computers | linux1 has new disk | Alex put the new hard disk into linux1 along
with a fresh install of linux (CentOS).
The old disk was too damaged to copy.
|
|
|
127
|
Tue Nov 27 20:47:00 2007 |
tobin | Update | PSL | FSS | Rana, Tobin
We looked at the RF PD signal to the FSS |
|
|
136
|
Wed Nov 28 19:44:18 2007 |
tobin | Update | PSL | HEPA | I found the HEPA turned off completely. I
turned it on. |
|
|
137
|
Wed Nov 28 21:51:52 2007 |
tobin | Configuration | PSL | ISS | I replaced the front-end differential receivers
for the ISS's "inner-loop" sensor and monitor
diode inputs with lower-noise [url=http://focus.ti.com/docs/prod/folders/print/ths4131.html]THS4131[/url]'s |
|
|
140
|
Thu Nov 29 14:29:22 2007 |
tobin | Configuration | Computers | linux1 httpd/conlogger fixed | I think I fixed the [url=http://linux1/cgi-bin/conlog_web.pl]conlogger
web interface on linux1[/url].
|
|
|
158
|
Mon Dec 3 16:24:47 2007 |
tobin | HowTo | Computers | GNU screen | [url=http://jmcpherson.org/screen.html]GNU
screen[/url] is a utility that can be quite
handy for managing long-running psuedo-interactive |
|
|
159
|
Mon Dec 3 17:55:39 2007 |
tobin | HowTo | Computer Scripts / Programs | linemon | Matlab's Signal Processing toolbox has a [url=http://www.mathworks.com/access/helpdesk/help/toolbox/signal/index.html?/access/helpdesk/help/toolbox/signal/spectrum.html]set
of algorithms for identifying sinusoids in
data[/url]. Some of them (e.g., [url=http://www.mathworks.com/access/helpdesk/help/toolbox/signal/index.html?/access/helpdesk/help/toolbox/signal/rootmusic.html&http://www.mathworks.com/cgi-bin/texis/webinator/search/]rootmusic[/url]) |
|
|
162
|
Mon Dec 3 22:20:09 2007 |
tobin | Configuration | PSL | ISS | I replaced the painfully short 1' cables on
the ISS photodiodes with luxurious five foot
cables, made by chopping a ten foot Amphenol |
|
|
163
|
Tue Dec 4 23:16:35 2007 |
tobin | Update | PSL | ISS | I was confused to find that I could increase
the ISS gain slider all the way from 15dB
to 30dB without seeing much of any increase |
|
|
166
|
Wed Dec 5 16:57:36 2007 |
tobin | HowTo | Computer Scripts / Programs | SR785 data converter on linux | I was pleased to find that the SR785 Data
Viewer (including the command line conversion
utility) installs and works in linux using |
|
|
167
|
Wed Dec 5 17:49:57 2007 |
tobin | Update | PSL | ISS | Attached is a plot of the ISS RIN with a variety
of gain settings.
|
|
|
169
|
Wed Dec 5 18:22:03 2007 |
tobin | Update | PSL | ISS dark noise | Attached is a plot of the dark noise spectrum
of the ISS photodiodes (1) before fooling
with them, (2) after replacing the 4151's |
|
|
171
|
Wed Dec 5 20:32:51 2007 |
tobin | Update | PSL | ISS dark noise | The ISS dark noise is not coming from the
PD heads; the spectrum is essentially unchanged
when the PD is unplugged from the ISS. Did |
|
|
177
|
Thu Dec 6 19:30:43 2007 |
tobin | Update | PSL | ISS dark noise - 60 Hz! | A higher resolution spectrum [attached] shows
that nearly all of the excess dark noise
on the ISS is in 60 Hz harmonics (with some |
|
|
181
|
Fri Dec 7 18:28:30 2007 |
tobin | Update | Computer Scripts / Programs | compiled matlab hoses itself | Andrey pointed out to me that some matlab
functions in the Signal Processing Toolbox
were dying with errors. Looking into the |
|
|
182
|
Fri Dec 7 18:31:30 2007 |
tobin | Update | Computer Scripts / Programs | compiled matlab hoses itself | Addendnum. The reason the linemon_mcr command
was in the path was because of the user issuing
the command "addpath(genpath(pwd))" where |
|
|
183
|
Fri Dec 7 19:14:30 2007 |
tobin | Update | PSL | ISS dark noise - ground loop enlightenment | My alleged 60 Hz harmonics were all from a
ground loop created by connecting the SR785
ground to the ISS circuit ground; they disappeared |
|
|
185
|
Mon Dec 10 18:42:20 2007 |
tobin | Update | PSL | ISS RIN script | I wrote a script to measure the ISS RIN.
The script uses the "labca" interface (described
in an [url=http://dziban.ligo.caltech.edu:40/40m/117]earlier |
|
|
186
|
Mon Dec 10 19:08:03 2007 |
tobin | Configuration | PSL | MZ | The MZ seems finicky today--it keeps unlocking
and relocking.
|
|
|
187
|
Mon Dec 10 20:35:59 2007 |
tobin | Configuration | Computer Scripts / Programs | autolocking scripts | I added this tidbit of csh code to the MZ
autolocker to prevent multiple copies from
running (on one computer):
|
|
|
189
|
Wed Dec 12 22:24:48 2007 |
tobin | Frogs | PEM | weather station | I poked at the weather station briefly this
evening.
|
|
|
196
|
Tue Dec 18 16:50:35 2007 |
tobin | Update | SAFETY | uvex laser safety glasses defective | A few days ago we noticed what appeared to
be a blotched, speckled fracturing of the
coating of the "UVEX" laser safety glasses. |
|
|
197
|
Tue Dec 18 21:31:31 2007 |
tobin | Update | PSL | ISS RIN | My measurements of the ISS RIN via the SR785
and via the DAQ disagree considerably. The
spectral shapes are very similar, however, |
|
|
210
|
Fri Dec 21 20:32:25 2007 |
tobin | Update | Photos | GigE camera | I couldn't resist any longer: I plugged in
the Prosilica GC 750 GigE camera and took
it for a spin. This is the little CMOS camera |
|
|
211
|
Sat Dec 22 00:52:57 2007 |
tobin | Configuration | PSL | ISS surgery | In an attempt to quell oscillations in the
(unused) outer loop portion of the ISS, I
shorted the "PD+" and "PD-" signals from |
|
|
212
|
Sat Dec 22 15:32:11 2007 |
tobin | AoG | Environment | ants | Ants are everywhere: on the PSL table, on
the circuit board I'm soldering...
|
|
|
219
|
Wed Jan 2 11:38:56 2008 |
tobin | Summary | WIKI-40M Update | wiki spam | Our wiki keeps getting spammed. It turns
out that you can upload attachments without
a password, which is a bug. I'll ask David |
|
|
231
|
Thu Jan 10 00:12:01 2008 |
tobin | Summary | Locking | DR | [John, Tobin, Rana]
1. We found SUS_BS_SENSOR_UL to have a ratty |
|
|
238
|
Mon Jan 14 23:11:26 2008 |
tobin | Configuration | General | fiber | John and I removed the fiber that ran from
the SP table to the cleanroom. We plan to
build a MZ interferometer with this fiber |
|
|
239
|
Tue Jan 15 13:15:27 2008 |
tobin | Update | Environment | lots of noise | They're throwing concrete around at the construction
site. |
|
|
243
|
Wed Jan 16 19:57:49 2008 |
tobin | Configuration | Photos | ISCT_EX | Here's a photo of the ISCT_EX table, for the
purpose of planning our auxiliary laser arm
locking scheme. Note the (undumped!) beam |
|
|
247
|
Thu Jan 17 20:50:55 2008 |
tobin | Update | General | fiber coupling | Sam, John, and I matched the beam from an
NPRO into a fiber on the SP table today.
In doing so we used our GigE camera for |
|
|
250
|
Fri Jan 18 20:53:56 2008 |
tobin | Configuration | General | ETMY oplev | I monkeyed around with the ETMY oplev, adding
a folding mirror and moving the HeNe so that
John, Sam, and I have more room for our auxiliary |
|
|
253
|
Tue Jan 22 13:11:03 2008 |
tobin | Update | ASC | ETMY oplev recentered | The light wasn't even on the diode. |
|
|
277
|
Sun Jan 27 13:13:21 2008 |
tobin | Metaphysics | General | departure | It's been grand. Thanks for having me!
GWAVES IN '08!
|
|
|
498
|
Sun May 25 21:14:14 2008 |
tobin | Configuration | Computers | EPICS proxy server | I set up an EPICS gateway server on Nodus
so that we can look at 40m MEDM screens from
off-site.
|
|
|
500
|
Tue May 27 16:24:54 2008 |
tobin | Configuration | Computer Scripts / Programs | ndsproxy | The NDS Proxy is a program that accepts NDS
(LIGO Network Data Server) connections from
the internet and relays them to
|
|
|
508
|
Fri May 30 21:30:15 2008 |
tobin | Configuration | Computers | svn on solaris | I installed svn on op440m. This involved
installing the following packages from sunfreeware:
|
|
|
510
|
Sun Jun 1 19:39:35 2008 |
tobin | Configuration | Computers | elog, etc | Phil Ehrens gave me a DVD of the 40m elog,
apache, and (Jamie's) SVN archive.
I copied it to nodus:/home/controls/dvd-from-ehrens. |
|
|
513
|
Tue Jun 3 10:19:45 2008 |
tobin | Configuration | Computers | big machine | Several of us transported the big new awesome
Sun box from Bridge over to
the 40m last week. If I recall correctly, |
|
|
514
|
Tue Jun 3 10:40:27 2008 |
tobin | Configuration | Computers | new dataviewer | Alex let me know the secret location of the
latest dataviewer executable for Linux.
It is:
|
|
|
636
|
Sun Jul 6 16:17:40 2008 |
tobin | HowTo | Computers | SVN | I was able to check out the 40m SVN here in
Livingston using this command:
|
|
|
68
|
Tue Nov 6 14:51:03 2007 |
tobin, rob | Update | IOO | Mode cleaner length | Using the Ward-Fricke variant* of the [url=http://ilog.ligo-wa.caltech.edu/ilog/pub/ilog.cgi?group=detector&date_to_view=02/14/2004&anchor_to_scroll_to=2004:02:15:00:06:50-daniel]Sigg-Frolov
method[/url], we found the length of the
mode cleaner to be [b]27.0934020183 meters[/b], |
|
|
16183
|
Fri Jun 4 17:46:25 2021 |
unYehonathan | Update | CDS | Opto-isolator for c1auxey | I mounted the optoisolator on the DIN rail
and connected the 3 first channels
|
|
|
3038
|
Wed Jun 2 18:36:20 2010 |
valera | DAQ | CDS | Noise generators in LSP | Alex wrote a new code to implement LSP
noise generator. The code is based on 64
bit random number generator from Numerical |
|
|
3048
|
Thu Jun 3 22:33:31 2010 |
valera | Summary | CDS | simulated plant work | I put matlab files and a summary
into the 40m wiki for the fitting of the
40m Optickle transfer functions and generating |
|
|
3070
|
Fri Jun 11 22:09:58 2010 |
valera | HowTo | CDS | foton | It appears that foton does not like
the unstable poles, which we need to model
the transfer functions. |
|
|
3074
|
Sun Jun 13 08:28:44 2010 |
valera | Update | Locking | 40m Upgrade Optickle Model | In my calculation of the digital
filters of the optical transfer functions
the carrier light is resonant in coupled |
|