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  40m Log, Page 335 of 344  Not logged in ELOG logo
ID Datedown Author Type Category Subject Text Attachments
  476   Wed May 14 13:14:19 2008 AndreySummaryComputersReflective Memory Network is restored
[COLOR=blue]Reflective Memory Network is
restored, all watchdogs and oplevs are returned
  
  475   Tue May 13 10:38:28 2008 steveUpdateComputersrfm network is downThe RFM network went down yesterday around
5pm
Only c1susvme1 is alive but it's timing is
  
  474   Tue May 13 10:15:52 2008 steveUpdateSUSrestored damping of BS & PRMI think our janitor was cleaning too heavy
handedly.
The BS and PRM sus damping were lost.
  
  473   Fri May 9 10:15:36 2008 josephbUpdateComputersNodus has movedSteve and myself moved Nodus from under the
table in the control room, to just above
the Rana computer in the control room rack.
  
  472   Fri May 9 08:40:24 2008 steveUpdateSUSETMY sus damping restoredETMY lost damping at 19:10 last night.
There was no seismic event than.
Sus damping was restored this morning. 
  
  471   Thu May 8 16:40:36 2008 josephbConfigurationCamerasGige Camera currently on PSL tableAndrey and myself were working on the PSL
table today, using a pickoff of a pickoff
of the main beam (adding a microscope slide
  
  470   Thu May 8 02:06:13 2008 ranaSummaryCOCThermal Lensing in the ITMs and BS may be a problemThe iLIGO interferometers start to see thermal
lensing effects with ~2W into the MC, a recycling
gain of ~50, and a beam waist on the ITMs
  
  469   Thu May 8 01:50:25 2008 ranaSummaryASCArm Cavity HOM ResonancesNothing new, but I calculated the frequencies
of the first 22 higher order transverse modes
and thought I might as well list them here.
  
  468   Thu May 8 01:07:24 2008 ranaSummaryLSCFrequency 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 
  
  467   Wed May 7 15:25:41 2008 robConfigurationLSCAP33 -> POX33[quote]
I am in the process of switching the POX166
and AP33 photodetectors, so that they become
  
  466   Tue May 6 17:28:39 2008 robConfigurationLSCAP33 -> POX33
I am in the process of switching the POX166
and AP33 photodetectors, so that they become
  
  465   Mon May 5 15:53:14 2008 steveUpdateVACdrypump replaced & readbacks are outThe small turbo pump of the annulus system
is tp3
It's drypump was replaced at 1.4 Torr after
  
  464   Mon May 5 11:04:30 2008 robOmnistructureComputersNetwork setup
Mafalda was not connected to the network,
and so our DMF-based seisBLRMS has not been
  
  463   Thu May 1 12:46:02 2008 josephbConfigurationComputersNodus gateway is upThe computer Nodus is now acting as a gateway
machine between the GC network and the martian
network in the 40m.  It has the same passwords
  
  462   Thu May 1 08:31:51 2008 steveUpdateSUSearthquake trips etmy & mc1Earthquake at Lake Isabel magnitude 4.4 at
1am today shakes the 40m
ETMY and MC1 watchdogs tripped.
  
  461   Wed Apr 30 20:48:58 2008 AndreySummaryPEMNew Weather Channels
I created the new channels for the weather
station, all letters are capital ones. They
 April30-5hours.png 
  460   Tue Apr 29 21:30:49 2008 AndreyUpdatePEMIn the process of renaming channels for Weather Station
I startted renaming channels for the weather
station, and I will continue this tomorrow,
  
  459   Tue Apr 29 21:09:12 2008 ranaDAQCDSFE FiltersThese are new FE filters for downsampling
and upsampling. We will be going from native
hardware sampling rates of 64k down to 32k,
 fefilters.jpgfefilters.txt 
  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
  
  457   Sun Apr 27 22:57:15 2008 ajwDAQComputersbr40m?[quote]
The testpoint manager (which runs on fb40m)
crashed this afternoon.  Upon re-starting
  
  456   Sun Apr 27 18:11:58 2008 robDAQComputersbr40m?
The testpoint manager (which runs on fb40m)
crashed this afternoon.  Upon re-starting
  
  455   Sun Apr 27 05:09:30 2008 ranaConfigurationIOOMC WFS Whitening turned onI [B]hardwired on the MC WFS whitening[/B]
filters.
 mcnoise.png 
  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)
  
  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)
  
  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 
  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
  
  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 
  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 
  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 
  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
  
  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.
  
  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]
  
  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
  
  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 
  442   Thu Apr 24 14:10:26 2008 robUpdateLockinglocking work[I]Rob, Johnnie[/I]

We made some progress on locking last night
  
  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:
  
  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
  
  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
  
  438   Tue Apr 22 22:19:02 2008 robMetaphysicslorejiggling sliders
In the interests of tacit communication of
scientific knowledge, I here reveal a nugget
  
  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
  
  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]
  
  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.
  
  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 
  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 
  
  432   Mon Apr 21 12:58:42 2008 robUpdateASScheck adaptive[quote]

Caryn Palatchi (a Caltech undergrad who just
  
  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 
  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
  
  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 
  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 
  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 
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