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ID Dateup Author Type Category Subject Text Attachments
  2318   Mon Nov 23 21:36:38 2009 KojiUpdateIOOAligned PMC/RCI aligned the beam goes to PMC. It increased
the MC Trans from 8.25 to 8.30.
I also aligned the beam goes to RC.
 091123_PSL.png 
  2319   Tue Nov 24 08:00:16 2009 ranaUpdateLSCMeasured MC lengthI propose that from now on, we indicate
in the elog what frequencies we're referring
to. In this case, I guess its the front panel
  
  2320   Tue Nov 24 10:36:21 2009 KojiUpdateLSCMeasured MC lengthWhat I meant was the VCO driver, not the
FSS box.
As for the frequency, all written
  
  2321   Tue Nov 24 14:33:22 2009 AlbertoUpdateABSLworking on the AP tableI'm working on the AP table. I also opened
the auxiliary NPRO shutter. The auxiliary
beam is on its path on the AP table and PSL
  
  2322   Tue Nov 24 16:06:45 2009 JenneUpdateComputers40m frame builder backup acting funny

    
        
  
  2323   Tue Nov 24 18:24:54 2009 SanjitConfigurationAdaptive FilteringASS channels added to framebuilder 
[Sanjit, Jenne, Rob, Joe]
 
  
  2324   Tue Nov 24 19:16:02 2009 AlbertoUpdateABSLworking on the AP table


   
        
            
  
  2325   Wed Nov 25 03:05:15 2009 robUpdateLockingMeasured MC length

    
        
  
  2326   Wed Nov 25 08:43:08 2009 AlbertoUpdateABSLWorking on the AP tableI'm working on the AP table. I also opened
the auxiliary NPRO shutter. The auxiliary
beam is on its path on the AP table and PSL
  
  2328   Wed Nov 25 10:20:47 2009 AlbertoUpdateABSLAbsL PLL not able to lockLast night something happened on the
beat between the PSL beam and the auxiliary
NPRO beam, that spoiled the quality of the
  
  2329   Wed Nov 25 11:02:54 2009 AlbertoUpdateABSLAbsL PLL not able to lock

    
        
  
  2330   Wed Nov 25 11:10:05 2009 JenneUpdateComputers40m frame builder backup acting funny

    
        
  
  2331   Wed Nov 25 12:28:22 2009 JenneUpdateSUSMC2 trippedJust felt a big "kerplunk" type
ground-shaking, presumably from all the antics
next door.  MC2's watchdog tripped as
  
  2332   Wed Nov 25 14:29:08 2009 robUpdateLockingMeasured MC length--FSS trend

    
        
 FSStrendpowerjump.png 
  2333   Wed Nov 25 15:38:08 2009 robUpdateLockingMeasured MC length

    
        
  
  2334   Wed Nov 25 15:42:27 2009 AlbertoUpdateABSLWorking on the AP table


   
        
            
  
  2335   Wed Nov 25 16:13:27 2009 ranaUpdatePSLMeasured MC length--FSS trendbut the increase in both the RCtrans and
the RCrefl is consistent with my theory that
the power going to the RC has increased ;
  
  2336   Wed Nov 25 16:44:52 2009 KojiUpdatePSLMeasured MC length--FSS trendI checked C1:PSL-FSS_VCODETPWR. The attached
is the 4 months trend of the FSS RCTRANS
/ RFPDDC(=FSS REFL) / VCODETPWR / VCOMODLEVEL.
 091125_FSS.png 
  2337   Wed Nov 25 20:14:58 2009 AlbertoUpdateABSLAbsL PLL not able to lock: problem fixed

    
        
  
  2338   Wed Nov 25 20:24:49 2009 AlbertoUpdateABSLPLL Open Loop Gain MeasuredI measured the open loop gain of the PLL
in the AbsL experiment.
I repeated the measurement twice:
 2009-09-25_OLgain_g3png.png2009-09-25_OLgain_g6png.png 
  2339   Wed Nov 25 20:28:17 2009 AlbertoUpdateABSLStopped working on the AbsLI closed the shutter of the NPRO for the
night.
  
  2340   Wed Nov 25 20:44:48 2009 kiwamuUpdateElectronicsMulti-resonant EOM --- Q-factor ----Now I am studying about the behavior of
the Q-factor in the resonant circuit because
the Q-factor of the circuit directly determine
 trans.pngeq1.pngimpedance.pngeq2.png 
  2341   Thu Nov 26 02:08:34 2009 KojiUpdateElectronicsMulti-resonant EOM --- Q-factor ----The key point of the story is:
"The
  
  2342   Fri Nov 27 02:25:26 2009 ranaUpdateABSLPLL Open Loop Gain Measured


   
        
            
  
  2343   Sat Nov 28 20:27:12 2009 KojiUpdatePSLFSS oscillation: Total gain reducedI stopped by the 40m for some reason and
found that the MC trans was 7.5.
This was caused by an oscillation
 091128_PSL.png 
  2344   Sun Nov 29 16:56:56 2009 robAoGall down cond.sea of redCame in, found all front-ends down.
 
Keyed a bunch of crates, no luck:
  
  2345   Mon Nov 30 10:28:47 2009 AlbertoAoGall down cond.sea of red

    
        
  
  2346   Mon Nov 30 11:29:40 2009 AlbertoAoGall down cond.sea of red

    
        
  
  2347   Mon Nov 30 11:45:54 2009 JenneUpdateComputersWireless is backWhen Alberto was parting the Red Sea this
morning, and turning it green, he noticed
that the wireless had gone sketchy.
  
  2348   Mon Nov 30 16:23:51 2009 JenneUpdateComputersc1omc restartedI found the FEsync light on the OMC GDS
screen red.  I power cycled C1OMC, and
restarted the front end code and the tpman. 
  
  2349   Mon Nov 30 19:23:50 2009 JenneUpdateMZMZ downCame back from dinner to find the Mach
Zehnder unlocked.  The poor IFO is kind
of having a crappy day (computers, MZ, and
  
  2350   Thu Dec 3 15:55:24 2009 AlbertoAoGLSCRF AM Stabilizer Output PowerToday I measured the max output power at
the EOM output of one of the RF AM Stabilizers
that we use to control the modulation depth.
  
  2351   Fri Dec 4 18:54:03 2009 JenneUpdatePEMRanger movedThe Ranger was left in a place where it
could be bumped during next week's activities
(near the crawl-space to access the inside
 RangerSeismometer_SR560settings_4Dec2009.JPG 
  2352   Fri Dec 4 21:48:01 2009 JenneUpdateoplevsOplevs centered, IP_POS and IP_ANG centered[Jenne Koji]
 We aligned the full IFO, and
centered all of the oplevs and the IP_POS
 Oplev_IPang_screenshot_4Dec2009.png 
  2353   Fri Dec 4 23:17:55 2009 robUpdateoplevsOplevs centered, IP_POS and IP_ANG centered


   
        
            
  
  2354   Sat Dec 5 01:40:11 2009 KojiUpdateoplevsOplevs centered, IP_POS and IP_ANG centeredWe restarted daqd and
it did restored the problem
http://lhocds.ligo-wa.caltech.edu:8000/40m/Computer_Restart_Procedures#fb40m
  
  2355   Sat Dec 5 14:41:07 2009 robAoGall down cond.sea of red, againTaking  a cue from entry 2346,
I immediately went for the nuclear
option and powered off fb40m.  Someone
  
  2356   Sat Dec 5 15:20:10 2009 JenneAoGall down cond.sea of red, again


   
        
            
  
  2357   Sat Dec 5 17:34:30 2009 robUpdateIOOfrequency noise problemThere's a large broadband increase in the
MC_F spectrum.  I'm not totally sure
it's real--it could be some weird bit-swapping
 mcf.png 
  2358   Sat Dec 5 18:23:48 2009 KojiUpdateoplevsOplevs centered, IP_POS and IP_ANG centeredNOTE: HEPA
is on at its full.
 Screenshot_091205_1830.png 
  2359   Sat Dec 5 22:31:52 2009 robUpdateIOOfrequency noise problem

    
        
  
  2360   Mon Dec 7 09:38:05 2009 KojiUpdateVACVent startedSteve, Jenne, Koji
The PSL was blocked by the
  
  2361   Mon Dec 7 18:18:55 2009 JenneUpdateCOCETMX drag wiped[Koji, Jenne, Alberto, Steve, Bob]
ETMX has
  
  2362   Mon Dec 7 19:02:22 2009 MottUpdateGeneralReflectivity Measurements I have made some measurements of the R
value for some coatings we are interested
in.  The plots have statistical error
 Y1-45P_R.pngY1-45S_R.pngY1-50CC_R.png 
  2363   Tue Dec 8 03:53:49 2009 kiwamuUpdateSUSFree swinging spectra of ETMX In this night, I checked the free swinging
spectra of ETMX to make sure nothing wrong
with ETMX by the wiping.
 ETMX_air.png 
  2364   Tue Dec 8 09:18:07 2009 JenneUpdateComputersA *great* way to start the day....Opening of ETMY has been put on hold to
deal with the computer situation.  Currently
all front end computers are down.  The
  
  2365   Tue Dec 8 10:20:33 2009 AlbertoDAQComputersBootfest succesfully completedAlberto, Kiwamu, Koji,
this morning we found the RFM network
and all the front-ends down.
  
  2366   Tue Dec 8 13:03:26 2009 KojiUpdateCOCETMY drag wipedJenne, Kiwamu, Alberto, Steve,   
  2367   Tue Dec 8 16:27:13 2009 JenneUpdateCOCITMX wipedJenne, Kiwamu, Koji, Alberto, Steve, Bob
ITMX
  
  2368   Tue Dec 8 23:13:32 2009 kiwamuUpdateSUSfree swinging spectra of ETMY and ITMXThe free swinging spectra of ETMY and ITMX
were taken after today's wiping, in order
to check the test masses.
 SUS-ETMY.pngSUS-ITMX.png 
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