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  40m Log, Page 265 of 341  Not logged in ELOG logo
ID Date Author Type Category Subject Text Attachments
  3842   Mon Nov 1 23:31:05 2010 yutaUpdateCDSchecked input hardware filter in single frequencyBackground:
  For input filter, we have analog
whitening filter and also digital whitening
  
  3841   Mon Nov 1 19:32:08 2010 yutaSummaryCDSfb crashed? during c1ioo and c1mcs connection at ASCFrame builder
died again!!
  
  3840   Mon Nov 1 17:27:47 2010 JenneUpdateSUSPRM ready for installation into chamber[Jenne, Suresh]
Over the weekend, Bob and Daphen
gave the PRM a 48hr. vacuum bake.  This
  
  3839   Mon Nov 1 16:43:24 2010 KojiSummaryCDSCDS time delay measurementUm, Beautiful.   
  3838   Mon Nov 1 15:47:15 2010 yutaSummaryCDSCDS time delay measurementBackground:
  I measured CDS time delay last
week, but because of my lack of understanding
 downupsampling.pngCDSdelay2.png 
  3837   Mon Nov 1 15:35:41 2010 josephbUpdateCDSFront end USR and CPU times now recorded by DAQProblem:
We have no record of how long the
CPUs are taking to perform a cycle's worth
  
  3836   Mon Nov 1 14:53:30 2010 josephb, alex, rolfUpdateCDSAlex updated FB and mx_streams codeProblem:
The framebuilder was being flaky. 
MX_streams would go down, prevent testpoints
  
  3835   Mon Nov 1 12:38:56 2010 Leo SingerConfigurationComputerspython-sqlite installed on AllegraI installed the Python bindings for sqlite
on Allegra using
$ sudo yum install python-sqlite
  
  3834   Mon Nov 1 11:34:08 2010 josephbUpdateCDSCA.Client.Exception spam fixedProblem:
CA.Client.Exception...............................................
  
  3833   Mon Nov 1 10:28:41 2010 steveBureaucracySAFETYSuresh received 40m safety trainingOur new postdoc Suresh Doravari received
40m specific safety training last week.
  
  3832   Mon Nov 1 10:17:55 2010 steveUpdateGeneralbreakers relabelledPedro of the electrical shop helped to
retrace wires from the racks to the breakers.
Many wrong labels were replaced. These labels
 P1060970.JPGP1060972.JPGP1060975.JPG 
  3831   Sun Oct 31 00:19:35 2010 ranaSummaryComputer Scripts / ProgramsHP3563A netGPIB functionI've wheeled the old HP audio frequency
signal analyzer into the control room to
debug the GPIB/python interface. The wireless
  
  3830   Sat Oct 30 14:35:43 2010 KojiSummaryCDSCDS time delay measurementUnsatisfactory.
Neglecting the digital anti-imaging
 CDS_system_investigation_090323.pdf 
  3829   Sat Oct 30 05:27:53 2010 yutaSummaryCDSCDS time delay measurementMotivation:
  We want to know the time delay
of CDS in the IOP scheme.
 delaysetup.pngCDSdelay.png 
  3828   Fri Oct 29 18:37:33 2010 yutaSummaryCDSdaqd and current CDS statusBackground:
  Before Joe left(~ 1 hour ago),
fb was working for a while. But after he
 06-25-2009.NN_24ThreatLevel.GJH2L69BK.1.jpg 
  3827   Fri Oct 29 16:43:25 2010 josephbUpdateCDSc1ioo now talking to c1susProblem:
c1ioo was not able to talk to c1sus
because of timing issues.  This prevented
  
  3826   Fri Oct 29 16:39:01 2010 JenneUpdateTreasureOld Green suspension towers disassembled[Jenne, Joonho]
At Koji's request, we disassembled
2 of the old Green suspension towers that
 P1070014.JPGP1070015.JPG 
  3825   Fri Oct 29 16:03:35 2010 kiwamuUpdatePSLwideband EOM : installed the triple resonant box 
 
 small_DSC_2654.jpg 
  3824   Fri Oct 29 14:16:26 2010 JenneUpdateSUSPRM baking[Suresh, Jenne]
We took a look-see at the PRM after
the gluing from last night.  The balance
  
  3823   Fri Oct 29 14:06:12 2010 kiwamuUpdateGreen LockingRe: 80MHz VCO for green PLL : VCO calibrationP.S. There is a document about the 80MHz
VCO box. This may be helpful. 
  
  3822   Fri Oct 29 11:29:29 2010 josephbUpdateCDSHow I broke the frame builder yesterdayProblem:
Long before Yuta came along and deleted
daqd, I had done something to prevent the
  
  3821   Fri Oct 29 11:25:15 2010 josephb, yutaSummaryCDS[EMERGENCY] accidentally deleted daqdProblem:
Missing daqd file, i.e. the framebuilder
executable.
  
  3820   Fri Oct 29 06:20:20 2010 kiwamuUpdateGreen Locking80MHz VCO for green PLL : VCO calibration I calibrated the VCO frequency
as a function of the applied input voltage.
 calibration.png 
  3819   Fri Oct 29 05:40:51 2010 kiwamuUpdatePSLwideband EOM aligned : AM decreased by 24dBAt the
PSL table I aligned the wideband EOM more
 EOMalign.png 
  3818   Fri Oct 29 04:58:04 2010 KevinUpdatePSLPBS Optimization[Koji and Kevin]
Since there was still a lot of power
being reflected from the PBS before the Faraday
  
  3817   Fri Oct 29 04:24:34 2010 KojiUpdateIOOPMC output increased: need attention[Kevin Koji]
- The PBS alignment increased
the transmitted power
  
  3816   Fri Oct 29 01:18:03 2010 KojiSummarySUSPRM standoff glued[Suresh Koji]
The standoff glued. The incandescent
lamp set for curing the epoxy.
 IMG_3674.jpg 
  3815   Thu Oct 28 23:17:15 2010 yutaSummaryCDS[EMERGENCY] accidentally deleted daqdRana showed me that if c1sus machine runs
c1mcs stuff(and c1x02 stuff) only, we can
use dataviewer without crashing fb.
  
  3814   Thu Oct 28 21:20:11 2010 yutaUpdateCDSFlaky fb, tried DAQ re-install, but no helpSummary:
  Unfortunately, fb is flakier
than normal. 
  
  3813   Thu Oct 28 20:08:26 2010 yutaUpdateGreen Lockingrevised RF amp cascadingBackground:
  Yesterday, I said I will use
ZHL-32A for amplifying beat note signal,
  
  3812   Thu Oct 28 19:10:26 2010 taraUpdateElectronicsTTFSS for 40mI keep a set of new TTFSS for 40m in electronic
cabinet along the North arm.
The set number is #6. It is working
  
  3811   Thu Oct 28 16:38:54 2010 josephbUpdateCDSFlaky fb, reverted inittab changes on fbProblem:
Yuta reported many of the signals
being displayed by dataviewer "fuzzier"
  
  3810   Thu Oct 28 13:01:34 2010 steveUpdatePEMcrane repair guys left for the day


   
        
            
  
  3809   Thu Oct 28 11:54:31 2010 KojiUpdateGreen Lockingchecked frequency counter SR620ZHL-32A is a high power (well..., actually
middle power) amplifier with the max output
power of +29dBm (~1W!).
  
  3808   Thu Oct 28 09:16:17 2010 steveUpdatePEMwelding in the vertex areaFire-smoke sensors in the vertex area #2-31,
2-30 east, 2-32 south/MC2 and 2-37 old control
room area are turned off to accommodate the
  
  3807   Thu Oct 28 04:28:50 2010 yutaUpdateGreen Lockingchecked frequency counter SR620(Kiwamu, Yuta)

Background:
  
  3806   Thu Oct 28 04:23:38 2010 ranaUpdateIOOA2L prepTo get the angle to length signal before
the c1ioo processor gets going, we need a
length signal. We can use either the error
  
  3805   Thu Oct 28 03:39:58 2010 yutaUpdateIOOgot very stable MC locking(Rana, Suresh, Jenne, Kiwamu, Kevin,
Yuta)
 C1IOO_MC_SERVO20101028.pngMCrocks!.png 
  3804   Thu Oct 28 03:21:35 2010 SureshUpdateLockingAligned the MC2 transmission photodiodeYuta and
Suresh
  
  3803   Thu Oct 28 03:07:53 2010 kiwamuUpdateGreen Locking80MHz VCO for green PLL : a health check I
did a health check for a 80MHz VCO box. 
 VCO_LPF_fit.png 
  3802   Thu Oct 28 02:01:51 2010 KevinUpdatePSLFilter for 2W Laser[Rana and Kevin]
I made a low pass filter for the
piezo driver for the 2W laser that is now
 tf.PDFoutside.jpginside.jpg 
  3801   Wed Oct 27 21:51:29 2010 SureshUpdatePSLAttenuation of PSL NPRO removedThe laser
power was attenuated to 40 mW yesterday for
ensuring that the power built up within the
  
  3800   Wed Oct 27 21:33:42 2010 SureshUpdateLockingGreen from the far end re-obtained 
The
mirror which was moved during the mode matching
  
  3799   Wed Oct 27 17:06:48 2010 josephbUpdateCDSMoved c1iscey chassis and host interface board to c1iooProblem:
Need a working IO chassis connected
  
  3798   Wed Oct 27 16:15:35 2010 SureshUpdateSUSRe-glued magnet to the PRMThanh and I re-glued the magnet to the
PRM following the procedure outlined by Jenne
The PRM in the gluing fixture has
  
  3797   Wed Oct 27 15:38:19 2010 josephb, yutaUpdateCDSIO chassis with bad timing was taken back to DownsProblem:
The front end timing was not working
properly for 2 of the IO chassis.  They
  
  3796   Wed Oct 27 12:32:53 2010 josephbUpdateCDSfb rebooted to try and fix testpointsProblem:
Test points were unavailable last
night, even after reboots of c1sus and even
  
  3795   Wed Oct 27 11:52:45 2010 josephbUpdateelogElog needed to be restartedI had to restart the elog on Nodus because
it was no longer responding.
  
  3794   Wed Oct 27 11:34:40 2010 josephbUpdateCDSModified rc.local for front end machinesWhat was the problem:
On reboot, c1sus was in a strange
state.  The epics IOC was running, along
  
  3793   Wed Oct 27 10:53:03 2010 josephbConfigurationComputersWhy doesn't DTT work?!?Test points for the SUS channels should
be there.  They have been working previously
this week.  Possibly break down points
  
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