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  40m Log, Page 263 of 341  Not logged in ELOG logo
ID Date Author Type Category Subject Text Attachments
  3942   Wed Nov 17 23:45:20 2010 JenneUpdateSUSA bad day for suspensions[Jenne, Suresh]
Today has been a downright miserable
day in the world of suspension work. Thumbs
 StatusTable.png 
  3941   Wed Nov 17 20:44:59 2010 yutaSummaryCDSno QPD channels on c1sus machine today(Joe, Suresh, Yuta)

  
  3940   Wed Nov 17 16:02:30 2010 josephbUpdateCDSModified feCodeGen.pl to fix filtMuxMatrix name generationProblem:
Sometime in the last 3 weeks, probably
when Alex brought his latest changes from
  
  3939   Wed Nov 17 15:49:53 2010 ranaUpdateDAQOle Channel NamesThe following channels should be named
as below to keep in line with their names
pre-upgrade rather than use _DAQ in the name.
  
  3938   Wed Nov 17 10:39:20 2010 josephbUpdateCDSScreen Time FixAn improved python code to apply a replacement
to all *.adl files in a directory would be:
import
  
  3937   Wed Nov 17 02:53:41 2010 yutaUpdateIOOplaced new PRM to BS table(Kiwamu, Yuta)

Background:
  
  3936   Tue Nov 16 23:36:29 2010 Suresh, JenneUpdateSUSAssembly of ETMs[Jenne,
Suresh]
 
 StatusTable.png 
  3935   Tue Nov 16 21:42:31 2010 ranaUpdateCDSScreen Time FixI learned today that the following python
code will do a find/replace to fix the TIME
string on any MEDM screen which has a whited
  
  3934   Tue Nov 16 16:00:26 2010 AidanUpdateGreen LockingPID loop but no green

    

       
            
  
  3933   Tue Nov 16 15:32:18 2010 valeraUpdateElectronicsOSEM noise at the output of the satellite box I measured the SRM OSEM (no magnets
at the moment) noise out of the satellite
box with a SRS785 spectrum analyzer. I inserted
 osemnoise.pdf 
  3932   Tue Nov 16 12:47:30 2010 AidanUpdateGreen LockingPID loop but no greenThe PID loop is ready to be run on the
green beat note but, since the tanks are
open, there is no green transmission from
 Screenshot-C1LSC_EX_GRN_SLOW.adl.png 
  3931   Tue Nov 16 10:47:45 2010 AidanUpdateGreen LockingRebooted c1psl - added new GRNBEAT_FREQ channelI restored C1:PSL-126MOPA_126MON to its
original settings (EGUF = -410, EGUL = 410)
and added a new calc channel called C1:LSC-EX_GRNBEAT_FREQ
  
  3930   Tue Nov 16 09:02:54 2010 AidanUpdateGreen LockingPID loop - calibration of SR620 output [Aidan, Kiwamu]
Kiwamu and I roughly calibrated the
analogue output from the SR620 frequency
  
  3929   Tue Nov 16 03:33:22 2010 yutaUpdateIOOaligned Faraday, beam reached SM just before PRM(Koji, Yuta)

 MCalignNov16.png 
  3928   Mon Nov 15 22:24:28 2010 SureshUpdateSUSSelection of MagnetsI have
selected a set of 16 magnets which have a
B field between 900 to 950 Gauss (5% variation)
  
  3927   Mon Nov 15 17:10:59 2010 kiwamuUpdateGreen LockingPLL with real green signal I
checked the slow servo and the PLL of 80MHz
 FCnoise.png 
  3926   Mon Nov 15 16:26:46 2010 josephbUpdateCDSc1iscex is now running and the network hasn't diedProblem:
c1iscex was spamming the network
with error messages.
  
  3925   Mon Nov 15 16:09:44 2010 JenneUpdateVACETMX, ETMY, ITMY chambers opened[Steve, Jenne, Suresh, Koji]
The remaining test mass chambers
have been opened, and have light doors in
  
  3924   Mon Nov 15 15:02:00 2010 KojiSummaryPSLpower measurements around the PMC[Valera Yuta Kiwamu Koji]
Kiwamu burtrestored c1psl.  We measured
the power levels around the PMC.
  
  3923   Mon Nov 15 15:01:51 2010 kiwamuUpdateIOOrealigned the wideband EOMSince we are going to lock the MC today,
I
aligned it back to the default place.
  
  3922   Mon Nov 15 14:42:01 2010 AidanUpdatePSLC1PSL rebooted? Yeah. Joe and I rebooted c1psl a couple
of times this morning. I didn't realize the
burtrestore wasn't automatic.
  
  3921   Mon Nov 15 14:36:37 2010 KojiUpdatePSLC1PSL rebooted? Has C1PSL rebooted? Has burtrestore been
forgotten? Even without elog?
We found some settings are wrong
  
  3920   Mon Nov 15 11:52:22 2010 kiwamuUpdateGreen LockingPLL with real green signal   PLL_with_green.png 
  3919   Mon Nov 15 11:13:12 2010 josephbUpdateCDSModified rc.local to not start mx_streams automaticallyProblem:
c1iscex floods the network with about
1 gigabyte of error messages in a few seconds,
  
  3918   Mon Nov 15 04:57:10 2010 ranaUpdateElectronicsSRM side OSEM noise with no magnetIF I believe this calibration and IF I
believe that the noise is the same with no
magnet in there, then its almost 1
  
  3917   Sun Nov 14 16:40:46 2010 JenneUpdateTreasureActivities related to OSEM measurement[Valera, Jenne]
We pondered the idea of clamping
the PRM optic to measure the OSEM noise. 
  
  3916   Sun Nov 14 16:26:31 2010 jenne, valeraUpdateElectronicsSRM side OSEM noise with no magnetWe realized that the SRM sensors are connected
to the readout but just sitting on the BS
in vacuum table with no magnets and therefore
 SRM-SD-Current-NoMagnet.pdf 
  3915   Sun Nov 14 11:56:59 2010 valeraUpdateCDSTest of ADC noise 
We missed
  
  3914   Sun Nov 14 02:59:31 2010 ranaConfigurationGeneralMEDM snapshots web pageSince Nodus is a Solaris machine it can
barely handle doing the ImageMagick commands
(such as convert and import). I removed
  
  3913   Sat Nov 13 16:57:21 2010 valeraConfigurationElectronicsPRM Side OSEM transimpedance changeNow that we have increased the range of
the AA to +/- 10 V I have increased the PRM
side OSEM transimpedance from 29 kV/A to
 PRM-SD-ADC.pdfPRM-SD-Current.pdf 
  3912   Sat Nov 13 15:53:05 2010 yutaUpdateCDSdiagonalization of MC input matrixMotivation:
  MC is aligned from the A2L
measurement, but to do the beam centering
 MCspectraNov09.pngMCspectraNov13.pngMC1spetra_wrongmatrix.png 
  3911   Fri Nov 12 20:40:51 2010 josephb, yuta, valeraConfigurationElectronicsAA voltage rangeWe changed the range of the two SUS AA
boards in the corner from +/-2 V to +/-10
V by changing the supply voltage from +/-5
  
  3910   Fri Nov 12 19:24:56 2010 KojiUpdateCDSTest of ADC noise[Koji Yuta]
We found one of the ADC cables were
left unconnected. This left the MC suspensions
  
  3909   Fri Nov 12 13:12:55 2010 kiwamuUpdatePSLincreased NPRO powerI maximized
the laser power by rotating the HWP after
  
  3908   Fri Nov 12 12:06:11 2010 AidanConfigurationGreen LockingPID script working - now it needs to be tuned I've set up a PID script that senses
the EX-PSL Green Beat note (from the frequency
counter) and actuates on the temperature
 Screen_shot_2010-11-12_at_12.05.01_PM.png 
  3907   Fri Nov 12 11:36:06 2010 AidanConfigurationComputersFixed the PERL PATH errors from the scripts directory change I've been trying to get a PID loop
running for the green locking and I've discovered
that some of the directories in the path
  
  3906   Fri Nov 12 10:49:34 2010 josephb, valeraUpdateCDSTest of ADC noiseTest:
Look at the effects of the ADC voltage
range on the ADC noise floor.
 ADC_noise.pdf 
  3905   Fri Nov 12 06:10:24 2010 yutaUpdateIOOMC aligned (without coil balancing)Background:
  Last night, we found that one
of DAC channels are poorly connected, so
 MCalignCALIB.png 
  3904   Fri Nov 12 02:51:20 2010 KevinUpdateElectronicsPhotodiode Testing[Jenne and Kevin]
I started testing the REFL55 photodiode.
With a light bulb, I saw ~270 mV of DC voltage
  
  3903   Fri Nov 12 00:42:11 2010 rana, kojiUpdateIOOMC alignmentWe decided to ignore the computer script
outputs for the beam positions and use instead
the eyeball method to get the beam into the
  
  3902   Fri Nov 12 00:13:34 2010 SureshUpdateSUSETM assembly started[Jenne,
Suresh]
Selection
  
  3901   Thu Nov 11 23:35:23 2010 KojiSummaryCDSfound poor contact of DAC cable, previous A2L results were wrong[Koji / Yuta]
There were
 IMG_3698.jpgbad-boys.pngIMG_3705.jpgIMG_3706.jpg 
  3900   Thu Nov 11 21:07:49 2010 josephbUpdateCDSPlugged c1iscex into DAQ network - still causes network slowdownI connected the c1iscex computer to the
dedicated DAQ network switch (located in
1X7).
  
  3899   Thu Nov 11 18:05:55 2010 valeraUpdatePSLPMC mode matching at full laser power The
PMC mode matching was initially done at low
power ~150 mW. It was expected and found
 scan.pdfpmc2-abcd.png 
  3898   Thu Nov 11 17:47:36 2010 kiwamuUpdateGreen Locking80MHz VCO : improve PLL hold-in range and put a boostIn order
to enlarge the hold-in range I modified the
 vco_pll.pngVCO_lfb.png 
  3897   Thu Nov 11 15:27:43 2010 valera, steveConfiguration ISS AOM installed We installed the ISS AOM in the PSL.
The AOM was placed right after the EOM. The
beam diameter is ~600 um at the AOM. The
  
  3896   Thu Nov 11 13:54:05 2010 kiwamuUpdateGreen Locking80MHz VCO : about PLL hold-in range

The hold-in
 range_green.pngPLL.png 
  3895   Thu Nov 11 11:51:30 2010 KojiSummaryCDSfound poor contact of DAC cable, previous A2L results were wrongThe cause is apparent!
The connectors on the cables are wrong!
  
  3894   Thu Nov 11 11:08:26 2010 steveBureaucracyPEMAP table found openPlease remember to cover the optical tables
!
  
  3893   Thu Nov 11 07:26:03 2010 AlbertoUpdateElectronicsREFL11 Photodiode Not Working


   
        
            
  
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