40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log, Page 324 of 328  Not logged in ELOG logo
ID Date Author Type Category Subject Text Attachments
  205   Thu Dec 20 02:04:09 2007 AndreyUpdateComputer Scripts / ProgramsNew overnight measurements in XARM and their results
I ran in the daytime/evening time my program,
changing the damping gains in suspension
 11x 
  204   Wed Dec 19 20:28:27 2007 AndreyDAQPEMNames for all 6 accelerometers have been changed
I eventually [COLOR=red]changed the names
for all 6 accelerometers[/COLOR] (see my
  
  203   Wed Dec 19 16:40:12 2007 steveUpdateSAFETYlaser safety glasses measuredI measured the coarse transission at 1064nm
 of the 40m safety glasses today.
  
  202   Wed Dec 19 16:07:37 2007 AndreySummaryComputer Scripts / ProgramsResults of overnight measurements Tue/Wed night (entry #198)
As indicated in ELOG entry 198, I was making
[COLOR=red]overnight measurements during
 11x 
  201   Wed Dec 19 15:51:00 2007 AndreyUpdateComputer Scripts / ProgramsDaytime measurements in XARM and their results
I was making measurements in XARM for three
different nights. All the results agree with
 11x 
  200   Wed Dec 19 11:31:01 2007 steveOmnistructurePEMaircond filter maintenanceJeff is working on all air condiontion units
of the 40m lab
This we do every six months.
 acfilters6m.jpg 
  199   Tue Dec 18 23:41:00 2007 AndreySummaryComputer Scripts / ProgramsResults of Mon/Tue overnight measurements (entry #194)
Here I inform our community about the results
of the measurements of RMS values in XARM
 12x 
  198   Tue Dec 18 23:27:36 2007 AndreyConfigurationComputer Scripts / ProgramsNew overnight measurements (this night from Tue to Wed)
[COLOR=red]I am making overnight measurements
in XARM tonight.[/COLOR]
  
  197   Tue Dec 18 21:31:31 2007 tobinUpdatePSLISS RINMy measurements of the ISS RIN via the SR785
and via the DAQ disagree considerably. The
spectral shapes are very similar, however,
 iss-rin.pdf 
  196   Tue Dec 18 16:50:35 2007 tobinUpdateSAFETYuvex laser safety glasses defectiveA few days ago we noticed what appeared to
be a blotched, speckled fracturing of the
coating of the "UVEX" laser safety glasses.
 bad-glasses.jpgbad-glasses-zoom.jpg 
  195   Tue Dec 18 00:51:39 2007 AndreyUpdateComputer Scripts / ProgramsResults of Saturday overnight measurements
As I indicated in the previous e-log entry
(#194), I made overnight measurements in
 11x 
  194   Mon Dec 17 23:42:08 2007 AndreyConfigurationComputer Scripts / ProgramsOvernight measurements in X-arm
I am making overnight measurements this night
(from Monday to Tuesday) in XARM.
  
  193   Mon Dec 17 11:47:13 2007 albertoUpdateElectronicsan alternative design for the RFAM monitor's filter at 33MhzSince the Butterworth turned out o be rather
wide-band, I tried an other configuration
for the 33 MHz filter. Attached are the simulated
 RFSim99-33MHz.pngRF99-SimmButterworthPrototype.pngRFSim99-33MHz-TFplot.png 
  192   Sun Dec 16 16:52:40 2007 dmassUpdateComputersComputer on the end FixedI had Mike Pedraza look at the computer on
the end (tag c21256). It was running funny,
and turns out it was a bad HD.
  
  191   Thu Dec 13 23:56:02 2007 AndreyConfigurationComputer Scripts / ProgramsOvernight measurements
[COLOR=blue]After my disease[/COLOR] (fever,
vomitting, nose problem, overall weakness)
  
  190   Thu Dec 13 12:05:36 2007 albertoOmnistructureElectronicsThe new Butterworth seems to work quite wellIt works better probably because of the small
inductors I'm using this time.
The peak is at 30 MHz because I didn't have
 TF_New_Butterworth_12-Nov-2007_TF.pngBultervverth2.png 
  189   Wed Dec 12 22:24:48 2007 tobinFrogsPEMweather stationI poked at the weather station briefly this
evening.
  
  188   Wed Dec 12 16:22:22 2007 albertoOmnistructureElectronicsLC filter for the RF-AM monitor circuitIn 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
 TF_LC_filter_10pF_1.8uH_scope_probe.pngTF_LC_filter_10pF_1.8mH_no_probe.pngLC_filter_schematic.png 
  187   Mon Dec 10 20:35:59 2007 tobinConfigurationComputer Scripts / Programsautolocking scriptsI added this tidbit of csh code to the MZ
autolocker to prevent multiple copies from
running (on one computer):
  
  186   Mon Dec 10 19:08:03 2007 tobinConfigurationPSLMZThe MZ seems finicky today--it keeps unlocking
and relocking.
  
  185   Mon Dec 10 18:42:20 2007 tobinUpdatePSLISS RIN scriptI 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
 rin-20071210-1831.pdf 
  184   Mon Dec 10 13:54:26 2007 robHowToComputer Scripts / ProgramsDon't blame the Matlab compiler
For human error.  We should be careful to
only run the compiler outside the mDV directory
  
  183   Fri Dec 7 19:14:30 2007 tobinUpdatePSLISS dark noise - ground loop enlightenmentMy alleged 60 Hz harmonics were all from a
ground loop created by connecting the SR785
ground to the ISS circuit ground; they disappeared
  
  182   Fri Dec 7 18:31:30 2007 tobinUpdateComputer Scripts / Programscompiled matlab hoses itselfAddendnum.  The reason the linemon_mcr command
was in the path was because of the user issuing
the command "addpath(genpath(pwd))" where
  
  181   Fri Dec 7 18:28:30 2007 tobinUpdateComputer Scripts / Programscompiled matlab hoses itselfAndrey pointed out to me that some matlab
functions in the Signal Processing Toolbox
were dying with errors.  Looking into the
  
  180   Fri Dec 7 14:14:48 2007 robMetaphysicsComputer Scripts / Programstdsread problems on Solaris
[COLOR=darkblue]tdsread[/COLOR] has developed
a strange new illness, whereby it cannot
  
  179   Fri Dec 7 11:33:24 2007 waldmanOmnistructureOMCPZT wiringThe 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
  
  178   Fri Dec 7 00:02:26 2007 ranaSummaryIOOMC/FSS Frequency Noise[U][B]The FSS frequency noise is not very
bad.[/B][/U]
 fly.pdf 
  177   Thu Dec 6 19:30:43 2007 tobinUpdatePSLISS 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
 iss.pdf 
  176   Thu Dec 6 19:19:47 2007 AndreyConfigurationSUSSuspension damping Gain was restored
Suspension damping gain was disabled for
some reason (all the indicators in the most
  
  175   Thu Dec 6 18:11:15 2007 robHowToComputer Scripts / ProgramsMaking DMF monitors
I was able to use the matlab compiler to
compile a version of the [B]linetracker[/B]
  
  174   Thu Dec 6 15:22:42 2007 AndreySummaryElectronicsPictures 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.
 DSC_0226.JPGDSC_0228.JPG 
  173   Thu Dec 6 15:21:59 2007 albertoFrogsElectronicsRF Transfer Function of Stiff Aluminum WiresTransfer function of 3cm long Aluminum wires
and of 3cm stranded wires
 TF_3cm_stiff_wires.amplitude.pngDSC_0225compressed.JPGTF_3cm_stranded_wires.amplitude.png 
  172   Wed Dec 5 23:19:03 2007 AndreyConfigurationPEMAccelerometers are turned on
All accelerometers have been turned on, as
Alan asked during Wednesday meeting.
 7x 
  171   Wed Dec 5 20:32:51 2007 tobinUpdatePSLISS dark noiseThe ISS dark noise is not coming from the
PD heads; the spectrum is essentially unchanged
when the PD is unplugged from the ISS.  Did
  
  170   Wed Dec 5 19:25:07 2007 ranaDAQCDSDMFI made a database file on C1AUX called dmf.db.
It has 9 DMF EPICS channels which are also
trended
  
  169   Wed Dec 5 18:22:03 2007 tobinUpdatePSLISS dark noiseAttached is a plot of the dark noise spectrum
of the ISS photodiodes (1) before fooling
with them, (2) after replacing the 4151's
 sense_noise.pdf 
  168   Wed Dec 5 18:08:36 2007 AndreyUpdateASCOptical Lever laser for ETMX is installed
A new laser with \lambda=633nm has been intalled
and the mirror adjusted so that the signal
 DSC_0199.JPG 
  167   Wed Dec 5 17:49:57 2007 tobinUpdatePSLISSAttached is a plot of the ISS RIN with a variety
of gain settings.   
 rin.pdf 
  166   Wed Dec 5 16:57:36 2007 tobinHowToComputer Scripts / ProgramsSR785 data converter on linuxI was pleased to find that the SR785 Data
Viewer (including the command line conversion
utility) installs and works in linux using
  
  165   Wed Dec 5 13:49:08 2007 albertoUpdateElectronicsRF AM PD lines monitorIn the last weeks Iíve been working on the
design of an electronic board to measure
directly the power of the main spectral lines
 alberto.spectrum2.pngButterworth.PNG 
  164   Wed Dec 5 10:57:08 2007 albertoHowToComputersConnecting the GPIBto USB interface to the Dell laptopThe interface works only on one of the USB
ports of the laptop (the one on the right,
looking at the computer from the back).
  
  163   Tue Dec 4 23:16:35 2007 tobinUpdatePSLISSI 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
  
  162   Mon Dec 3 22:20:09 2007 tobinConfigurationPSLISSI replaced the painfully short 1' cables on
the ISS photodiodes with luxurious five foot
cables, made by chopping a ten foot Amphenol
  
  161   Mon Dec 3 19:44:58 2007 Accelerometers on new mountsConfigurationPEMAndrey
I (Andrey) continued today working with new
accelerometer mounting. (see entry #151 about
 DSC_0194.JPGDSC_0195.JPGDSC_0196.JPG 
  160   Mon Dec 3 19:06:49 2007 ranaDAQComputer Scripts / ProgramslinemonI 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]
 spd64d1.jpg 
  159   Mon Dec 3 17:55:39 2007 tobinHowToComputer Scripts / ProgramslinemonMatlab'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])
  
  158   Mon Dec 3 16:24:47 2007 tobinHowToComputersGNU screen[url=http://jmcpherson.org/screen.html]GNU
screen[/url] is a utility that can be quite
handy for managing long-running psuedo-interactive
  
  157   Mon Dec 3 00:10:42 2007 ranaDAQComputer Scripts / ProgramslinemonI've started up one of our first Matlab based
DMT processes as a test.
  
  156   Sun Dec 2 21:13:16 2007 ranaConfigurationIOOMC SUS re-alignment   e.png 
ELOG V3.1.3-