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  40m Log, Page 172 of 339  Not logged in ELOG logo
ID Date Author Type Category Subject Text Attachments
  8425   Tue Apr 9 00:15:18 2013 ManasaUpdate40m UpgradingEndtable upgrade for auxiliary green laser : populating the table[Den, Annalisa, Manasa]

The Alberto laser was moved from the
  
  8424   Mon Apr 8 22:43:44 2013 ranaUpdatePSLMC locking troubles: MC/FSS servo unstableThe MC seemed to be losing lock recently
quite a bit. I noticed that the PC Drive
RMS signal was red.
 Untitled.png 
  8423   Mon Apr 8 16:37:26 2013 SteveUpdate40m UpgradingETMY enclosure wall transmission 
 Enclosure cover #1 transmission
measured  in 1064 nm,  156 mW, 
  
  8422   Mon Apr 8 10:19:46 2013 JenneUpdatePSLLSC left enabled 
 Note: The TRY PD isn't installed
and normalized properly yet, so the IFO OVERVIEW
  
  8421   Mon Apr 8 08:05:41 2013 SteveUpdatePSLPMC lockedThe PMC locked manually. MC  grabbed
lock instantaniously
  
  8420   Sun Apr 7 20:49:19 2013 ZachUpdateGeneralRestarted elogwith the script, as it was down.   
  8419   Sat Apr 6 09:21:36 2013 ranaUpdate40m UpgradingNot a fan of the new plastic box yet 
 1) We still need to drill and
install the thumbscrew latches
  
  8418   Fri Apr 5 01:28:56 2013 ManasaUpdate40m UpgradingEndtable upgrade for auxiliary green laser : populating the tableI started populating the end table; the
TRY path to start with. I found that I need
to redo the cables/electronics layout around
  
  8417   Fri Apr 5 01:18:34 2013 ManasaUpdate40m UpgradingNot a fan of the new plastic box yet

    

       
            
  
  8416   Thu Apr 4 17:23:05 2013 SteveUpdate40m Upgrading ETMY optical table & enclosure is ready for optics

    

       
            
  
  8415   Thu Apr 4 14:37:15 2013 JamieConfigurationElectronicsputting together a 110 MHz LSC demod boardI'm having Steve order the following:
2x  SXBP-100+
2x  SCLF-135+
  
  8414   Thu Apr 4 13:39:12 2013 Max HortonUpdateSummary PagesGraph LimitsGraph Limits: The limits on graphs
have been problematic.  They often reflect
too large of a range of values, usually because
  
  8413   Thu Apr 4 10:46:54 2013 KojiSummaryLSCREFL55 error signalsBeautiful double peaks. I don't see the
triple zero-crossings. Is this because you
adjusted the phase correctly (as predicted)?
  
  8412   Thu Apr 4 10:32:42 2013 GabrieleSummaryLSCREFL55 error signalsThe attached plot shows that also the behaviour
of the REFL11 and 55 signals is qualitatively
equal to the simulation outcome.
 prmi_refl_signals.pdf 
  8411   Thu Apr 4 10:12:55 2013 GabrieleSummaryLSCPOP22 and POP110I had a look at the POP110 signal, with
the PRMI flashing.
1) The LSCoffset script does not
 pop110_2.pdf 
  8410   Wed Apr 3 23:22:20 2013 ranaUpdateoptical tablesOptical Table Toolboxes Update There are some tips for how to appy
nail polish on YouTube from MKNails and MissJenFABULOUS.
Their tips on how to prepare the site for
  
  8409   Wed Apr 3 22:26:51 2013 ranaConfigurationElectronicsputting together a 110 MHz LSC demod board For the 110 MHz demod boards, we
would ideally have a plugin bandpass filter.
If you have some specs in mind, you can email
  
  8408   Wed Apr 3 19:01:06 2013 AlbertUpdateoptical tablesOptical Table Toolboxes Update

    

       
            
  
  8407   Wed Apr 3 18:41:22 2013 JamieConfigurationElectronicsputting together a 110 MHz LSC demod boardThis SCPQ-150+,
which is surface mount, might also work in
place of the PSCQ-2-120, which is through-mount. 
  
  8406   Wed Apr 3 18:27:03 2013 KojiUpdate QPD Voltage RegulatorsBreadboards may not be suitable for a reliable
work. Why don't you switch to any protoboard
and real soldering?
  
  8405   Wed Apr 3 18:22:00 2013 JenneUpdateElectronicsPOP110 re-implementedI have re-implemented POP110.  The
cable coming from the AS110 diode is disconnected,
labeled, and sitting in the cable tray next
  
  8404   Wed Apr 3 17:40:18 2013 JamieConfigurationElectronicsputting together a 110 MHz LSC demod boardI started to look into putting together
a 110 MHz demod board to be used as POP110
(see #8399).
  
  8403   Wed Apr 3 16:03:59 2013 ChloeUpdate QPD Voltage RegulatorsThe voltage regulator on the QPD breadboard
seems to be having problems... yesterday
Eric helped me debug my circuit and discovered
  
  8402   Wed Apr 3 15:00:24 2013 JamieSummaryElectronicsSorensen supplies in LSC rack (1Y2)I investigated the situation of the two
Sorensen supplies in the LSC rack (1Y2). 
They are there solely to supply power to
 20130403_141842.jpg 
  8401   Wed Apr 3 14:46:17 2013 GabrieleSummaryLSCError signal simulation in PRMIHere is a summary of a simulation of the
error signal behavior in the PRMI configuration.
The main parameters are: 
 14x 
  8400   Wed Apr 3 14:45:34 2013 JamieUpdateComputersupdated EPICS database (channels selected for saving)

    

       
            
  
  8399   Wed Apr 3 03:18:23 2013 JenneUpdateLockingPRMI locked with REFL55 I&Q for more than 1 minute[Rana, Gabriele, Jenne]
We have
 PRMI_sb_80sec_2Apr2013.png 
  8398   Wed Apr 3 01:32:04 2013 JenneUpdateComputersupdated EPICS database (channels selected for saving)I modified /opt/rtcds/caltech/c1/chans/daq/C0EDCU.ini
to include the C1:LSC-DegreeOfFreedom_TRIG_MON
channels.  These are the same channel
  
  8397   Tue Apr 2 23:14:02 2013 ranaUpdateLSC22/110MHz path for POP

    

       
            
  
  8396   Tue Apr 2 22:39:17 2013 AnnalisaUpdateAuxiliary lockingBeat note between "Alberto" NPRO laser and PSL laser 
 The beat note between the PSL
laser and the "Alberto" NPRO laser
 Beat_note_3col.jpg 
  8395   Tue Apr 2 21:11:42 2013 RanaUpdateoptical tablesOptical Table Toolboxes Update

    

       
            
  
  8394   Tue Apr 2 20:52:35 2013 ranaUpdateComputersiMac bashed I changed the default   
  8393   Tue Apr 2 18:19:30 2013 JenneUpdateSUSBS, PRM oplev servos improved 
[Gabriele, Jenne]
We have implemented 4Hz resonant
 PRM_servo_matches_BS.pdfprm_bs_optical_levers_comparison.pdf 
  8392   Tue Apr 2 17:23:23 2013 SteveUpdate40m Upgradingnew ETMY optical table & enclosure in place Enclosure is at the east end. It
has it's bottom o-ring in place. It will
be ready for optics tomorrow around 5pm
 EEopt1d.jpg 
  8391   Tue Apr 2 16:55:34 2013 JenneUpdateSUSoplev calibration online for ITMs, BS, PRM[Jenne, Gabriele]
We have put in a new EPICS input
into the SUS library part, just before the
 comparison_opl.pdf 
  8390   Tue Apr 2 16:13:10 2013 ranaUpdateSUSoplev calibration for ITMX, BS    
  8389   Tue Apr 2 15:58:40 2013 JenneUpdateSUSoplev calibration for ITMX, BS[Jenne, Gabriele]
Optical lever calibrations:
ITMX pit calibration = -9.07 cts/mrad
 opl_itmx.pngopl_bs.png 
  8388   Tue Apr 2 11:08:16 2013 KojiUpdateLSCPRMI lock> The two REFL55 signals
Wow! It's a good news.
I think this is our first ever lock
  
  8387   Tue Apr 2 10:22:37 2013 Rana, Gabriele, JenneUpdateLSCPRMI lockWe locked the PRMI, this time really on
the sidebands, using the two REFL55 signals.
Here are the parameters: triggering
 lock_prmi_sb.pdf 
  8386   Mon Apr 1 23:22:17 2013 AnnalisaUpdateAuxiliary lockingBeat note between "Alberto" NPRO laser and PSL laserI measured the beat note between the "Alberto"
NPRO laser and the PSL varying the PSL temperature
and find the matching NPRO temperature that
 Beat_Note.jpg 
  8385   Mon Apr 1 17:59:04 2013 JenneUpdateLockingPRMI videos[Gabriele's work, I'm just spectating]
Annalisa is working on finding the
PSL/AUX laser beatnote, so the PSL temp is
  
  8384   Mon Apr 1 16:35:42 2013 AlbertUpdateoptical tablesOptical Table Toolboxes Update

    

       
            
  
  8383   Mon Apr 1 16:24:09 2013 JamieFrogsLSCPD whitening switching fixed (loose connection at break-out box)

    

       
            
 20130401_161858.jpg20130401_161917.jpg 
  8382   Mon Apr 1 16:16:16 2013 AlbertUpdateoptical tablesOptical Table Toolboxes UpdateA heavy duty plastic box is the likeliest
candidate for the optical table toolbox.
It measures 5 9/16 in. x 11 5/8 in. x 4 5/8
  
  8381   Mon Apr 1 16:13:50 2013 ChloeUpdate QPDBecause we would like to get started on
testing mount vibrations as soon as possible,
I've been trying to get one of the other
  
  8380   Mon Apr 1 09:25:35 2013 JenneMetaphysicsLSCLock of PRMI on sidebands[Gabriele, Jenne]
I put a notch in FM10 for both MICH
and PRCL at 628Hz, to try to prevent us from
  
  8379   Mon Apr 1 09:05:09 2013 Jenne, GabrieleConfigurationLSCPOP22 configurationOn Friday we modified the POP22 set up:
now the PD output goes to a bias tee. The
DC output goes to the ADC board, while the
  
  8378   Sun Mar 31 17:26:32 2013 ranaUpdateLSCLock of PRMI on sidebands 
 Our first move has to be fixing
the whitening switching for REFL55. That's
  
  8377   Fri Mar 29 19:58:24 2013 Gabriele, JenneFrogsLSCAnalog whitening filter of REFL55 not switching

    

       
            
  
  8376   Fri Mar 29 19:56:02 2013 GabrieleMetaphysicsLSCLock of PRMI on sidebandsI finally managed to get long stretches
of PRMI lock, up to many minutes. The lock
is not yest very stable, it seems to me that
 lock_prmi5.pdflock_prmi6.pdflock_prmi7.pdfoscillation.pdflock_prmi8.pdf 
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