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ID Date Author Type Category Subject Text Attachments
  1586   Thu May 14 15:28:28 2009 steveSummarySUSApril 24 earthquake effect on MC2[quote][quote]The MC side problem could also
be the side tramp unit problem. Set the tramp
to 0 and see if that helps.[/quote]
 eq042409.jpg 
  1585   Thu May 14 02:36:05 2009 peteUpdateLockingunstable IFOIt seems that the MC3 problem is intermittent
(one-day trend attached).  I tried to
take advantage of a "clean MC3"
 mc3.jpg 
  1584   Thu May 14 00:15:39 2009 robSummarySUSChannel Hopping: That ancient enemy (MC problems)[quote]The MC side problem could also be the
side tramp unit problem. Set the tramp to
0 and see if that helps.[/quote]
 sidemon.png 
  1583   Wed May 13 21:15:04 2009 ranaSummarySUSChannel Hopping: That ancient enemy (MC problems)The MC side problem could also be the side
tramp unit problem. Set the tramp to 0 and
see if that helps.
  
  1582   Wed May 13 14:43:29 2009 robSummaryloreChannel Hopping: That ancient enemy (MC problems)


   
        
            
 MC3sidemon.png 
  1581   Wed May 13 12:41:14 2009 josephbUpdateCamerasTiming and stability tests of GigE Camera codeAt the request of people down at LLO I've
been trying to work on the reliability and
speed of the GigE camera code.  In my
 newCodeFPS.pngnewCodeFPS_hist.png 
  1580   Wed May 13 03:05:13 2009 peteUpdateoplevsetmy oplev quad was bad


   
        
            
  
  1579   Wed May 13 02:53:12 2009 robSummaryloreChannel Hopping: That ancient enemy (MC problems)We were stymied tonight by a problem which
began late this afternoon.  The MC would
periodically go angularly unstable, breaking
  
  1578   Tue May 12 17:26:56 2009 peteUpdateoplevsetmy oplev quad was badPete, Rob
After looking at some oplev noise
spectra in DTT, we discovered that the ETMY
 bad_oplev_quad.pdf 
  1577   Tue May 12 15:22:09 2009 YoichiUpdateLSCArm Finesse[quote]
It looks as if the measured DARM response
is skewed by an extra low pass filter at
  
  1576   Tue May 12 01:22:51 2009 YoichiUpdateLSCArm lossUsing the armLoss script (/cvs/cds/caltech/scripts/LSC/armLoss),
I measured the round trip loss (RTL) of the
arms.
  
  1575   Tue May 12 01:11:55 2009 YoichiUpdateLSCDARM response (DC Readout)I measured the DARM response with DC readout.

This time, I first measured the open loop
 SUS_Resp.pngDARM_Resp.png 
  1574   Mon May 11 12:25:03 2009 josephb,AlexUpdateComputersfb40m down for patchingThe 40m frame builder is currently being
patched to be able utilize the full 14 TB
of the new raid array (as opposed to being
  
  1573   Mon May 11 11:49:20 2009 steveUpdatePSLMOPA cooling water lines are backwards[quote]This is 8 days of 10-minute trend.

DTEC is just the feedback control signal
 htempvar80d.jpg 
  1572   Sun May 10 13:41:17 2009 steveUpdateVACETMY damping restored, VC1 openedETMY damping restored.
Cryo  interlock closed VC1 ~2
days ago. P1 is 6.3 mTorr. Cryo temp 12K
  
  1571   Sun May 10 13:34:32 2009 carynUpdatePEMUnplugged Guralp channelsI unplugged Guralp EW1b and Guralp Vert1b
and plugged in temp sensors temporarily.
Guralp NS1b is still plugged in.
  
  1570   Sat May 9 15:19:10 2009 ranaUpdatePSLLaser head temperature oscillationThis is 8 days of 10-minute trend.

DTEC is just the feedback control signal
 Picture_2.png 
  1569   Sat May 9 02:20:11 2009 JenneUpdatePSLLaser head temperature oscillation[quote]After the laser cooling pipe was unclogged,
the laser head temperature has been oscillating
in 24h period.
  
  1568   Sat May 9 00:15:21 2009 YoichiUpdatePSLLaser head temperature oscillationAfter the laser cooling pipe was unclogged,
the laser head temperature has been oscillating
in 24h period.
 laser.png 
  1567   Fri May 8 16:29:53 2009 ranaUpdateComputer Scripts / Programselog and NDSLooks like the new NDS client worked. Attached
is 12 hours of BLRMS.
 Untitled.png 
  1566   Fri May 8 16:03:31 2009 JenneUpdatePEMUpdate on Jenne's Filtering StuffTo include the plots that I've been working
on in some form other than on my computer,
here they are:
 H1S5OneMonthWienerCompBLACK.pngH1S5BandLimitedTimePlot.png 
  1565   Fri May 8 15:40:44 2009 peteUpdateLockingprogressively weaker locksthe align script was run after the third
lock here.  it would have been interesting
to see the arm powers in a 4th lock 
 powers_3lock.pdf 
  1564   Fri May 8 10:05:40 2009 AlanOmnistructureComputersRestarted backup since fb40m was rebootedRestarted backup since fb40m was rebooted.   
  1563   Fri May 8 04:46:01 2009 rana, yoichiSummaryoplevsBS/PRM/SRM table bad!We went to center the oplevs because they
were far off and found that (as usual) the
numbers changed
 a.png 
  1562   Fri May 8 04:31:35 2009 ranaUpdateComputer Scripts / Programselog and NDSIn the middle of searching through the elog,
its stopped responding. So I followed the
Wiki instructions
  
  1561   Fri May 8 02:39:02 2009 pete, ranaUpdateLockingcrossoverattached plot shows MC_IN1/MC_IN2. 
needs work.
This is supposed to be a measurement
 crossover.pdfphoto.jpg 
  1560   Fri May 8 02:08:59 2009 peteUpdateLockinglock stretcheslocks last for about an hour.  this
was true last night as well (see "arm
power curve" entries).   the second
 powers_oplev.pdf 
  1559   Thu May 7 23:34:59 2009 robUpdateSEIseisBLRMS already lostCan't find hostname 'fb40m'
 
it only lasted a few hours
  
  1558   Thu May 7 23:21:04 2009 peteUpdateLockingarm power curve


   
        
            
  
  1557   Thu May 7 18:12:12 2009 peteUpdateLockingarm power curveI've plotted TRX, TRY, PD12I and PD11Q. 
Arm powers after locking increase for a few
tens of minutes, peak out, and then decrease
 2009_may_7_powers.jpg 
  1556   Thu May 7 17:59:23 2009 AlbertoConfiguration MC WFSThis afternoon the MC could not get locked.
I
first checked the Osems values at the MC
mirrors and compared them to the trend of
  
  1555   Thu May 7 15:22:19 2009 josephb, albertoConfigurationComputersfb40m


   
        
            
  
  1554   Thu May 7 12:21:36 2009 josephb, alexConfigurationComputersfb40m Having determined that Rana (the computer)
was having to many issues with testing the
new Raid array due to age of the system,
  
  1553   Thu May 7 10:28:20 2009 steveUpdateVACretrofitted maglev's needs 
 Our spare Osaka maglev purchased
in Oct 2005 turned out to be having a viton
  
  1552   Wed May 6 19:04:11 2009 ranaSummaryVACvac imagesSince there's no documentation on this besides
Steve's paper notebooks...
 vacrack.pdf 
  1551   Wed May 6 16:56:35 2009 rana, alex, joeConfigurationComputersdaqd log, cront, etc.While Alex came over, we investigated the
log file problems with DAQD and NDS on FB0.
There was a lot of
  
  1550   Wed May 6 02:39:20 2009 YoichiHowToLockingHow to go to DC readoutI wrote a script called DC_readout, which
you can find in /cvs/cds/caltech/scripts/DRFPMI/bang/nospring/.
  
  1549   Tue May 5 14:02:16 2009 robUpdateLSCDARM DC response varies with DARM offsetNote the effect of quadrature rotation
for small offsets.
 DARM_DARM_AS_DC_2.pngDARM_DARM_AS_DC_3.pngDARM_DARM_AS_DC_2.pdfDARM_DARM_AS_DC_3.pdf 
  1548   Tue May 5 11:44:33 2009 robUpdateLocking DARM response
Here's the RF DARM optical response, on the
anti-spring side, from optickle.  Note that
 DARMtf_nospring.pngDARMtf_demodphases.png 
  1547   Tue May 5 10:42:18 2009 steveUpdateMOPAlaser power is back


   
        
            
 uncloged.jpg 
  1546   Tue May 5 09:22:46 2009 carynUpdatePEMzerosFor several of the channels on the PEM
ADCU, zeros are occuring at the same time.
Does anyone know why that might happen or
 zerotest2.pngzerotest.png 
  1545   Tue May 5 08:26:56 2009 robUpdateLockingDC Readout and DARM response[quote]Tonight, I was able to switch the DARM
to DC readout a couple of times.
But the lock was not as stable as the RF
  
  1544   Tue May 5 05:16:12 2009 YoichiUpdateLockingDC Readout and DARM responseTonight, I was able to switch the DARM to
DC readout a couple of times.
But the lock was not as stable as the RF
 DARM-TF.png 
  1543   Mon May 4 16:49:56 2009 AlbertoUpdateMOPAlaser power is dropped


   
        
            
  
  1542   Mon May 4 10:38:52 2009 steveUpdateMOPAlaser power is droppedAs PSL-126MOPA_DTEC went up, the power
out put went down yesterday
 dtecup.jpg 
  1541   Sun May 3 22:48:12 2009 YoichiUpdateLockingSome measurements at the lock pointI attached some measurement results at when
the IFO is at the full lock point.
 ArmPowerTrend.pngCARMSweep.pngCM-AO-Loop-SB1.png 
  1540   Sat May 2 16:34:31 2009 carynDAQPEMGuralp channels plugged back in I plugged the Guralp cables back into the
PEM ADCU
      
  
  1539   Fri May 1 18:51:34 2009 AlbertoSummaryEnvironmentearthquakeEarthquake 4.4 Leo Carrillo Beach.
Some of the watchdogs tripped out.
  
  1538   Fri May 1 18:24:36 2009 AlbertoSummaryGeneraljitter of REFL beam ?Some loud thinking.
 
For
the measurement of the length of the PRC,
I installed a fast photodiode in the path
  
  1537   Fri May 1 10:04:10 2009 robUpdateLocking166MHz LO phase adjustment[quote]I continued to adjust the REFL_2I demodulation
phase.
I first optimized the demod phase for SRCL
  
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