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  40m Log, Page 9 of 341  Not logged in ELOG logo
ID Dateup Author Type Category Subject Text Attachments
  407   Mon Mar 31 14:01:40 2008 jamieSummaryLSCSummary of DC readout PD non-linearity measurementsFrom March 21-26, I conducted some measurements
of the response non-linearity of some mock-up
DC readout photodetectors.  The detectors
 t21-r21_v_power.png 
  408   Mon Mar 31 14:14:16 2008 robUpdateComputersc1susvme2 status[quote]c1susvme2 is getting worse and worse.
 it won't run for more than ~45 minutes without
fatally de-syncing.  for now I've turned
  
  409   Wed Apr 2 15:03:51 2008 steveUpdateGeneralreflectivity of black glass The reflectivity of black glass, shade 12
was supplied by Donald O'Shea
of Emerald Glass Inc., Westlake, OH 44145
 bg12refl.pdfbg12refsetup.pdf 
  410   Thu Apr 3 18:33:17 2008 AndreySummaryEnvironmentStatus of Weather Station
During the last two days some things related
to weather station have been improved.
  
  412   Thu Apr 3 18:46:04 2008 AndreyConfigurationComputers"Network switch board" and "c1pem1 crate" were touched
While working with the weather station, I
did two things that potentially (with a very
 Computer_Rack.JPG 
  413   Thu Apr 3 19:27:50 2008 AndreySummaryPhotosTour for prospective grad studentsLast Friday (March 28), there was a tour of
40-meter lab for prospective graduate students.
 Rana_Lecturing.pdf 
  414   Fri Apr 4 16:54:06 2008 AndreySummaryEnvironmentWeather station is fully alive
[COLOR=blue]After today's trip to the roof
of our building the weather station seems
 Work_on_the_Roof.pdf 
  416   Mon Apr 7 16:42:56 2008 ranaUpdateComputerseLog intermittentPhil Ehrens restarted Dziban again this morning.
Looks like its still crashing each Monday
around 8 AM.
  
  417   Mon Apr 7 18:58:49 2008 steveUpdateGeneralreflectivity of SS304The reflectivity of stainless steel 304 super
polished # 8 was measured the same way as
elog entry 409
 ss304s8refl.pdf 
  418   Tue Apr 8 09:08:54 2008 steveConfigurationPEMweather station disconnectedWe can not leave cables in the walkways and
go on vacation.
I disconnected the weather station from the
 toast.jpg 
  419   Tue Apr 15 18:44:25 2008 ranaConfigurationComputersRosalbaThere is a new computer in the control room
-- its called [B][COLOR=purple]Rosalba[/COLOR][/B],
in keeping with our naming convention. Its
  
  420   Wed Apr 16 09:47:35 2008 AndreySummaryPEMWeather Station The weather station is functional again.

The long ethernet Cat5 cable connecting 'WeatherLink'
 Weather-FullData_3hrs.pngWeather_Trend_15hrs.png 
  421   Wed Apr 16 10:20:01 2008 AndreyUpdateComputersRosalba and linux3[quote]There is a new computer in the control
room -- its called [B][COLOR=purple]Rosalba[/COLOR][/B],
in keeping with our naming convention. Its
  
  422   Wed Apr 16 21:11:12 2008 ranaSummaryDAQAA/AI Filters for the DAQ & FE systemsI used Foton to make up some new filters which
will be used all over the project in order
to downsample/upsample.
 DAQ_filters_080416.pdf 
  423   Thu Apr 17 15:00:59 2008 steveUpdateVACvac controller computer to be replacedNow that Rosalba is up and running someone
should step forward to volunteer for this
job.
  
  424   Thu Apr 17 20:17:37 2008 AndreyUpdatePEMTwo issues with our weather station
I encountered two difficulties working with
the "Weather Station".
  
  425   Fri Apr 18 16:02:58 2008 alexUpdateSUSend station sus front-end bug fixinstalled and started new susEtmx.o and susEtmy.o
to fix a problem with ETMY optical lever
variables.
  
  426   Fri Apr 18 16:27:04 2008 robUpdateSUSend station sus front-end bug fix[quote]installed and started new susEtmx.o
and susEtmy.o to fix a problem with ETMY
optical lever variables.[/quote]
  
  427   Fri Apr 18 16:48:13 2008 AndreyUpdatePEMRain collector of weather station
Today the rain collector of our weather station
was cleaned. As a result, we checked that
 DSC_0520--before.JPGDSC_0537--after.JPG 
  428   Fri Apr 18 19:46:08 2008 ranaUpdateASScheck adaptiveI restarted the adaptive code today using
'startass' and 'upass'. 
I moved them into the scripts/ASS/ subdirectory.
 0052_xray_thm45.jpg 
  429   Sun Apr 20 18:23:27 2008 ranaSummaryLSClocking attemptsI noticed that the adaptive FF for the MC
had stopped doing anything; this turned out
 quix.png 
  430   Sun Apr 20 20:29:46 2008 ranaUpdateComputer Scripts / Programstdsread bugs[COLOR=darkred]There seems to be a problem
with reading the C1:IOO-MASTER_OVERFLOW field
  
  431   Sun Apr 20 23:39:57 2008 ranaSummarySUSMC1 electronics bustedI spent some time trying to fix the utter
programming fiasco which was our MCWFS diagonalization
script.
 mcwfs.jpg 
  432   Mon Apr 21 12:58:42 2008 robUpdateASScheck adaptive[quote]

Caryn Palatchi (a Caltech undergrad who just
  
  433   Mon Apr 21 13:12:21 2008 robUpdateComputer Scripts / Programstdsread bugs[quote][COLOR=darkred]There seems to be a
problem with reading the C1:IOO-MASTER_OVERFLOW
field 
  
  434   Tue Apr 22 08:34:22 2008 josephbConfigurationCamerasCurrent Network DiagramThe attached network diagram has also been
added to the 40m Wiki at http://lhocds.ligo-wa.caltech.edu:8000/40m/Image_Processing_with_GigE_Cameras
 Network.pdf 
  435   Tue Apr 22 10:59:24 2008 robUpdateSUSMC1 electronics busted[quote]I spent some time trying to fix the
utter programming fiasco which was our MCWFS
diagonalization script.
  
  436   Tue Apr 22 16:17:48 2008 robUpdateSUSend station sus front-end bug fix[quote]installed and started new susEtmx.o
and susEtmy.o to fix a problem with ETMY
optical lever variables.[/quote]
  
  437   Tue Apr 22 17:08:04 2008 CarynUpdateIOOno signal for C1:IOO-MC_L C1:IOO-MC_L signal was at zero for the past
few days
  
  438   Tue Apr 22 22:19:02 2008 robMetaphysicslorejiggling sliders
In the interests of tacit communication of
scientific knowledge, I here reveal a nugget
  
  439   Tue Apr 22 22:51:30 2008 ranaConfigurationIOOMcWFS StatusI've been working a little on the MC WFS in
the last few days. I have made many 
changes to the sensing matrix script and
  
  440   Wed Apr 23 22:39:54 2008 AndreyDAQComputer Scripts / ProgramsProblem with "get_data" and slow PEM channels
It turns out that I cannot read minute trends
for the slow weather channels for more than
  
  441   Thu Apr 24 11:50:10 2008 josephbSummaryComputer Scripts / ProgramsUseful tidbits learned while tracking the network setupIn process of understanding the network setup
I've learned several things:
  
  442   Thu Apr 24 14:10:26 2008 robUpdateLockinglocking work[I]Rob, Johnnie[/I]

We made some progress on locking last night
  
  443   Thu Apr 24 15:57:53 2008 steveConfigurationSAFETYSafety at AP-ISCTI measured the output power of the psl after
the mechanical shutter.
 P1020197.JPGmcrefl3.JPG 
  444   Thu Apr 24 22:06:47 2008 AndreySummaryComputersEthernet Cables and HubsToday in the morning (between 8.30AM and noon)
Joe and I were working on understanding which
ethernet cables connect "processors controlling
  
  445   Thu Apr 24 23:27:48 2008 ranaUpdatePEMacoustic noise in MC_FI looked at the [COLOR=darkblue][FONT=Comic
Sans MS][SIZE=3]coherence between the Microphone
in the PSL (PEM-AS_MIC) and the MC_F[/SIZE][/FONT][/COLOR]
  
  446   Thu Apr 24 23:50:10 2008 ranaUpdateGeneralSyringes in George the FreezerThere are some packets of syringes in the
freezer which are labeled as belonging to
an S. Waldman.
  
  447   Fri Apr 25 11:33:40 2008 AndreyConfigurationComputersComputer controlling vaccum equipment
[COLOR=blue]Old computer[/COLOR] (located
in the south-end end of the interferometer
  
  448   Fri Apr 25 13:20:04 2008 AndreyUpdatePEMMicrophone testIn response to Rana's request, I tested the
microphone (if it is alive or not) by clapping
my hands and speaking aloud nearby.
 Microphone.png 
  449   Fri Apr 25 13:53:11 2008 josephbSummaryComputersNetwork setupThis is the promised more in detail summary
from Andrey's log ID 444.
 40m_network_90.pdf 
  450   Fri Apr 25 15:44:21 2008 steveUpdatePSLscattering measurmentsIn pursuit of a low back scattering, high
power beam dump we looked at materials such:
polished copper, polished aluminum, diamond
 6x 
  451   Fri Apr 25 20:53:02 2008 ranaConfigurationIOOMC WFS with more gainQuick update: we found that the reason for
the MC WFS instability was that the digital
anti-whitening was one but not the analog
  
  452   Sat Apr 26 01:45:38 2008 AndreySummaryPEMWeather Station enhancementTwo more things concerning weather monitoring
have been done during this week.
 Matlab_Weather_Trends.png 
  453   Sat Apr 26 11:21:15 2008 ajwOmnistructureComputersbackup of /cvs/cds restartedThe backup of /cvs/cds (which runs as a cron
job on fb40m; see /cvs/cds/caltech/scripts/backup/000README.txt)
  
  454   Sun Apr 27 02:11:11 2008 ranaConfigurationIOOMC WFS NotesAs noted in the elog from Friday, the WFS
has been bad ever since someone switched
on the digital whitening filters (FM1 & FM2)
  
  455   Sun Apr 27 05:09:30 2008 ranaConfigurationIOOMC WFS Whitening turned onI [B]hardwired on the MC WFS whitening[/B]
filters.
 mcnoise.png 
  456   Sun Apr 27 18:11:58 2008 robDAQComputersbr40m?
The testpoint manager (which runs on fb40m)
crashed this afternoon.  Upon re-starting
  
  457   Sun Apr 27 22:57:15 2008 ajwDAQComputersbr40m?[quote]
The testpoint manager (which runs on fb40m)
crashed this afternoon.  Upon re-starting
  
  458   Mon Apr 28 23:44:33 2008 AndreyUpdateComputer Scripts / ProgramsWeather.db
I was trying to figure out how to modify
the file "Weather.db" so that the atm.pressure
  
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