ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
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154
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Sun Dec 2 21:02:12 2007 |
rana | Configuration | IOO | MC SUS re-alignment | [COLOR=purple][SIZE=2][B][FONT=Comic Sans
MS]The spot on MC2 was not centered, so I
put it back in the center:[/FONT][/B][/SIZE][/COLOR]
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155
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Sun Dec 2 21:07:39 2007 |
rana | Configuration | IOO | MC SUS re-alignment | [COLOR=darkblue][CODE]you asked for: diff
2007/12/01,4:58:48 2007/12/03,4:58:48 utc
'MC.*COMM'
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156
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Sun Dec 2 21:13:16 2007 |
rana | Configuration | IOO | MC SUS re-alignment | |
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157
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Mon Dec 3 00:10:42 2007 |
rana | DAQ | Computer Scripts / Programs | linemon | I've started up one of our first Matlab based
DMT processes as a test.
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158
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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 |
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159
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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]) |
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160
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Mon Dec 3 19:06:49 2007 |
rana | DAQ | Computer Scripts / Programs | linemon | I turned up my nose at Matlab's special tools.
I modified the linetracker to use the
relationship [U][B]phase = 2*pi*f*t[/B][/U] |
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161
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Mon Dec 3 19:44:58 2007 |
Accelerometers on new mounts | Configuration | PEM | Andrey |
I (Andrey) continued today working with new
accelerometer mounting. (see entry #151 about |
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162
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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 |
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163
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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 |
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164
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Wed Dec 5 10:57:08 2007 |
alberto | HowTo | Computers | Connecting the GPIBto USB interface to the Dell laptop | The interface works only on one of the USB
ports of the laptop (the one on the right,
looking at the computer from the back). |
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165
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Wed Dec 5 13:49:08 2007 |
alberto | Update | Electronics | RF AM PD lines monitor | In the last weeks I’ve been working on the
design of an electronic board to measure
directly the power of the main spectral lines |
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166
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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 |
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167
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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.
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168
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Wed Dec 5 18:08:36 2007 |
Andrey | Update | ASC | Optical Lever laser for ETMX is installed |
A new laser with \lambda=633nm has been intalled
and the mirror adjusted so that the signal |
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169
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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 |
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170
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Wed Dec 5 19:25:07 2007 |
rana | DAQ | CDS | DMF | I made a database file on C1AUX called dmf.db.
It has 9 DMF EPICS channels which are also
trended
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171
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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 |
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172
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Wed Dec 5 23:19:03 2007 |
Andrey | Configuration | PEM | Accelerometers are turned on |
All accelerometers have been turned on, as
Alan asked during Wednesday meeting.
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7x |
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173
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Thu Dec 6 15:21:59 2007 |
alberto | Frogs | Electronics | RF Transfer Function of Stiff Aluminum Wires | Transfer function of 3cm long Aluminum wires
and of 3cm stranded wires |
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174
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Thu Dec 6 15:22:42 2007 |
Andrey | Summary | Electronics | Pictures of the inside of He-Ne laser |
Steve gave me an old "dead" He-Ne laser that
long time ago was used for ETMX optical lever.
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175
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Thu Dec 6 18:11:15 2007 |
rob | HowTo | Computer Scripts / Programs | Making DMF monitors |
I was able to use the matlab compiler to
compile a version of the [B]linetracker[/B] |
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176
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Thu Dec 6 19:19:47 2007 |
Andrey | Configuration | SUS | Suspension damping Gain was restored |
Suspension damping gain was disabled for
some reason (all the indicators in the most |
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177
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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 |
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178
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Fri Dec 7 00:02:26 2007 |
rana | Summary | IOO | MC/FSS Frequency Noise | [U][B]The FSS frequency noise is not very
bad.[/B][/U]
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179
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Fri Dec 7 11:33:24 2007 |
waldman | Omnistructure | OMC | PZT wiring | The 2 pin LEMO connector has got an unmarked
pin and a pin marked by a white half-circle.
The unmarked pin is connected to the side |
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180
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Fri Dec 7 14:14:48 2007 |
rob | Metaphysics | Computer Scripts / Programs | tdsread problems on Solaris |
[COLOR=darkblue]tdsread[/COLOR] has developed
a strange new illness, whereby it cannot |
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181
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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 |
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182
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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 |
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183
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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 |
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184
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Mon Dec 10 13:54:26 2007 |
rob | HowTo | Computer Scripts / Programs | Don't blame the Matlab compiler |
For human error. We should be careful to
only run the compiler outside the mDV directory |
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185
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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 |
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186
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Mon Dec 10 19:08:03 2007 |
tobin | Configuration | PSL | MZ | The MZ seems finicky today--it keeps unlocking
and relocking.
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187
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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):
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188
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Wed Dec 12 16:22:22 2007 |
alberto | Omnistructure | Electronics | LC filter for the RF-AM monitor circuit | In the LC configuration (see attached schematic)
the resonant frequency is tuned to one of
the peak of our RF-AM monitor and it is amplified |
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189
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Wed Dec 12 22:24:48 2007 |
tobin | Frogs | PEM | weather station | I poked at the weather station briefly this
evening.
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190
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Thu Dec 13 12:05:36 2007 |
alberto | Omnistructure | Electronics | The new Butterworth seems to work quite well | It works better probably because of the small
inductors I'm using this time.
The peak is at 30 MHz because I didn't have |
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191
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Thu Dec 13 23:56:02 2007 |
Andrey | Configuration | Computer Scripts / Programs | Overnight measurements |
[COLOR=blue]After my disease[/COLOR] (fever,
vomitting, nose problem, overall weakness) |
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192
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Sun Dec 16 16:52:40 2007 |
dmass | Update | Computers | Computer on the end Fixed | I had Mike Pedraza look at the computer on
the end (tag c21256). It was running funny,
and turns out it was a bad HD.
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193
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Mon Dec 17 11:47:13 2007 |
alberto | Update | Electronics | an alternative design for the RFAM monitor's filter at 33Mhz | Since the Butterworth turned out o be rather
wide-band, I tried an other configuration
for the 33 MHz filter. Attached are the simulated |
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194
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Mon Dec 17 23:42:08 2007 |
Andrey | Configuration | Computer Scripts / Programs | Overnight measurements in X-arm |
I am making overnight measurements this night
(from Monday to Tuesday) in XARM.
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195
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Tue Dec 18 00:51:39 2007 |
Andrey | Update | Computer Scripts / Programs | Results of Saturday overnight measurements |
As I indicated in the previous e-log entry
(#194), I made overnight measurements in |
11x |
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196
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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. |
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197
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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, |
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198
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Tue Dec 18 23:27:36 2007 |
Andrey | Configuration | Computer Scripts / Programs | New overnight measurements (this night from Tue to Wed) |
[COLOR=red]I am making overnight measurements
in XARM tonight.[/COLOR]
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199
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Tue Dec 18 23:41:00 2007 |
Andrey | Summary | Computer Scripts / Programs | Results of Mon/Tue overnight measurements (entry #194) |
Here I inform our community about the results
of the measurements of RMS values in XARM |
12x |
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200
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Wed Dec 19 11:31:01 2007 |
steve | Omnistructure | PEM | aircond filter maintenance | Jeff is working on all air condiontion units
of the 40m lab
This we do every six months. |
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201
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Wed Dec 19 15:51:00 2007 |
Andrey | Update | Computer Scripts / Programs | Daytime measurements in XARM and their results |
I was making measurements in XARM for three
different nights. All the results agree with |
11x |
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202
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Wed Dec 19 16:07:37 2007 |
Andrey | Summary | Computer Scripts / Programs | Results of overnight measurements Tue/Wed night (entry #198) |
As indicated in ELOG entry 198, I was making
[COLOR=red]overnight measurements during |
11x |
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203
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Wed Dec 19 16:40:12 2007 |
steve | Update | SAFETY | laser safety glasses measured | I measured the coarse transission at 1064nm
of the 40m safety glasses today.
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