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ID Date Author Typedown Category Subject Text Attachments
  4469   Wed Mar 30 20:50:43 2011 BryanConfigurationGreen LockingThe wonderful world of mode-matchingStep  After_Faraday.pngAfter_Faraday_and_Rotated_Lens.png 
  4470   Wed Mar 30 21:21:15 2011 BryanConfigurationGreen LockingThe wonderful world of mode-matchingStep 4: Matching into  Oven_Lens_Solution_66mm.pngMatching_Into_Green_Oven_zoomed_out.pngMatching_Into_Green_Oven_zoomed_in.png 
  4473   Thu Mar 31 02:59:49 2011 KojiConfigurationGreen LockingThe wonderful world of mode-matching I went through the entries.
1. Give us a photo of the day. i.e.
Faraday, tilted lens, etc...
  
  4475   Thu Mar 31 11:30:51 2011 steveConfigurationGeneralstrain relieved rf cablesI strain relieved RF cables labeled 33
MHZ LO and 166 MHZ to EOM at 1X2  This
is a temporary setup for the 11 MHZ
 P1070491.JPG 
  4476   Thu Mar 31 14:10:00 2011 BryanConfigurationGreen LockingThe wonderful world of mode-matching

    

       
            
 P3310028.JPGP3310029.JPG 
  4477   Thu Mar 31 15:23:14 2011 BryanConfigurationGreen LockingThe wonderful world of mode-matching

    

       
            
 Zoomed_out_fitting01.pngZoomed_in_fitting01.png 
  4481   Fri Apr 1 18:54:41 2011 BryanConfigurationGreen LockingY end doubling ovenThe doubling oven is now ready to go for
the Y arm. The PPKTP crystal is mounted in
the oven:
 P4010036.JPGP4010041.JPG 
  4485   Mon Apr 4 14:20:32 2011 BryanConfigurationGreen LockingThe wonderful world of mode-matching   Waist_Fits_from_laser.pngWaist_Fits_Bench_Position.png 
  4486   Mon Apr 4 18:58:44 2011 BryanConfigurationGreen LockingA beam of purest greenWe now have green light at the Y end. 
The set-up (with careful instructions
 P4040042.JPG 
  4493   Wed Apr 6 18:55:49 2011 Jamie, LarisaConfigurationLSCmajor AP table cleanupWe ripped out all of the old AS, PLL, and
REFL paths, green, orange, and cyan respectively
on the old
  
  4495   Wed Apr 6 22:13:24 2011 BryanConfigurationGreen LockingResonating green light!Every so often things just work out. You
do the calculations, you put the lenses on
the bench, you manually adjust the pointing
  
  4520   Wed Apr 13 16:56:08 2011 BryanConfigurationGreen LockingY-ARM Green-Locked! Locked!
The Y-arm can
  
  4521   Wed Apr 13 23:32:07 2011 Aidan, JamieConfigurationLSCAS PD and Camera installedI spent some time tracking down the AS
beam which had vanished from the AP table.
Eventually, by dramatically mis-aligning
 AS_beam.jpgP1070546.JPG 
  4525   Thu Apr 14 17:45:59 2011 BryanConfigurationGreen LockingI leave you with these messages...OK…
the Y-arm may be locked with green light,
which was the goal, and this is all good
  
  4532   Fri Apr 15 13:43:23 2011 BryanConfigurationGreen LockingI leave you with these messages...Y-end PDH electronics.  Y_End_Electronics_TF.png 
  4536   Fri Apr 15 22:57:38 2011 Aidan, JamieConfigurationLSCAS PD and Camera installedAS port ITMX YAW  range where AS beam
was visible = [-1.505, -1.225] - these extrema
put the beam just outside of some aperture
  
  4540   Mon Apr 18 17:47:41 2011 kiwamuConfigurationLSCLSC rack's ADC cablingTo
understand the situation of the ADC cabling
at the LSC rack I looked around the rack
 LSCrack.png 
  4541   Mon Apr 18 21:09:45 2011 JamieConfigurationComputersnew control room machine: pianosaI've just installed the new control room
machine: "pianosa".   It is
a replacement for the old sun machine "op440m"
  
  4542   Mon Apr 18 21:14:53 2011 JamieConfigurationComputersnew control room machine: pianosaAlso, op440m's Sun monitor did not work well
with pianosa, so I'm lending pianosa my HP
monitor until we can get a suitable replacement.
  
  4547   Wed Apr 20 21:53:01 2011 SureshConfigurationRF SystemRF system: Stray heliax cableWe found a stray unused heliax   rogue_cable_1.png 
  4603   Tue May 3 00:44:02 2011 KojiConfigurationComputersMartian WIreless BridgeThe Martian wireless bridge has the ethernet
cable inserted in the wrong connector.
It should be inserted to one of the
  
  4612   Tue May 3 14:35:44 2011 Larisa ThorneConfigurationElectronicsJenne-Seismometer LPF project I was charge with making a Non-Inverting
Op Amp Low Pass Feedback circuit for Jenne,
which may somehow be integrated into a seismometer
 SeisLPFdiagram.jpgseisLPF.Bose.jpg 
  4625   Wed May 4 13:51:51 2011 valeraConfiguration Intermittent MC3 UL PD signalThe attached plot shows the 30 day trend
of the MC3 UL PD signal. The signal dropped
to zero at some point but now it is close
 mc3ulpdmon.pdf 
  4630   Wed May 4 17:32:06 2011 Larisa ThorneConfigurationElectronicsJenne-Seismometer LPF projectBuilding on what was posted previously
 
 
 SeisLPF3.jpg 
  4634   Thu May 5 12:01:53 2011 Larisa ThorneConfigurationElectronicsJenne-Seismometer LPF project Having finished the bulk of the work
for the LPF itself ( see here ),
I have begun trying to design the seismometer
 STS2diagram.png 
  4642   Thu May 5 15:26:52 2011 Leo SingerConfigurationComputers'glue' installed on some control room computersI installed 'glue' on Rossa, Allegra, and
Rosalba.  This is a Python module that
includes a facility for LIGO_LW XML files. 
  
  4644   Thu May 5 15:33:37 2011 steveConfigurationRF SystemLSC rackNew right angle PVC front panel with SMA
bulkhead connectors are in place. The connections
are still lose. It is ready for Suresh to
 P1070641.JPGP1070639.JPG 
  4646   Thu May 5 17:19:21 2011 Leo SingerConfigurationSUSTuning notch filters for bounce mode suspensionsI am tuning the notch filters for the bounce
modes in the suspensions, starting with the
ITMs and ETMs.  I'll do the MCs, the
 itmx-before.pdfitmx-before.pdfitmx-withbounceroll.pdftimx-nobounceroll.pdf 
  4652   Fri May 6 14:59:36 2011 Leo SingerConfigurationSUSTuning ITMY bandstopI tuned the ITMY bandstops -- 'before'
and 'after' spectra attached.  Note
that the after the tuning, the bounce mode
 itmy-before.pdfitmy-after.pdfitmy-nobounceroll.pdf 
  4667   Mon May 9 16:12:49 2011 JamieConfigurationCDScanonicalize paths to core and userappsI have updated the /opt/rtcds paths to
reflect the new specification of the CDS
aLIGO code release procedures document.
  
  4685   Wed May 11 10:49:16 2011 valeraConfigurationElectronicsMC3 LL PD has no signalYesterday we found that MC3 OSEM LL PD
did not have a sensible signal - the readback
was close to zero and it was making MC move
  
  4690   Wed May 11 16:04:36 2011 Larisa ThorneConfigurationElectronicsJenne-Seismometer LPF projectThe schematic for the seismometer box from
this last
time  has been updated...
 STS2diagram2.png 
  4691   Wed May 11 17:10:04 2011 kiwamuConfigurationElectronicsfixed : MC3 LL PD has no signal[Valera / Kiwamu]
It was because of a loose connection.
Pushing the connector solved the issue.
 looseconnectionMC3.png 
  4692   Wed May 11 17:20:24 2011 kiwamuConfigurationIOOloop diabled on PZT2[Valera / Kiwamu]
 
  
  4713   Fri May 13 17:20:48 2011 Leo SingerConfigurationSUSTuned bounce and roll mode of ETMY suspensionI tuned the bounce and roll mode bandstops
for ETMY, although it was difficult for me
to tell if there was improvement with the
  
  4730   Tue May 17 11:45:20 2011 JamieConfigurationCDSpurged non-c1 site files from rtcds checkout of cds_user_appsI purged all of the working copy checkouts
of site files for all sites that are not
c1 from the rtcds cds_user_apps working directory
  
  4732   Tue May 17 17:01:22 2011 jamieConfigurationCDSUpdate LSC channels from _DAQ to _DQAs of RCG version 2.1, recorded channels
use the suffix "_DQ", instead of
"_DAQ".  I just rebuilt and
  
  4733   Tue May 17 18:09:13 2011 Jamie, KiwamuConfigurationCDSc1sus and c1auxey crashed, rebootedc1sus and
c1auxey crashed, required hard reboot
  
  4735   Tue May 17 22:50:00 2011 JamieConfigurationLSCNew digital lockin added to LSC model/screenI added a lockin to the LSC model, and
added it's corresponding control to the LSC
screen.  Here's is what I added to the
 lsc-mdl-lockin.pnglsc-screen-lockin.pnglsc-lockin-screen.png 
  4743   Wed May 18 22:11:31 2011 ranaConfigurationLSCNew digital lockin added to LSC model/screen   Untitled.png 
  4761   Mon May 23 14:28:23 2011 kiwamuConfigurationLSCPOY55 installedLast
Saturday the POY55 RFPD (see
this entry
 POY55.png 
  4763   Mon May 23 18:16:42 2011 KojiConfigurationLSCPOY55 installedThe DC Transimpedance of POP55 was increased
from 50 Ohm to 10010 Ohm. There is the offset
of 46mV. This should be cancelled in the
  
  4764   Wed May 25 19:03:59 2011 JamieConfigurationCDSUpdate rtcds checkout of cds_user_apps with new top-level directory names.The top-level subsystem subdirectories
in the cds_user_apps source repository were
renamed today to be all lower case. 
  
  4765   Wed May 25 19:19:11 2011 JamieConfigurationCDS!!!CHECK IN YOUR MODELS!!!!!!CHECK
IN MODEL CHANGES!!!
Today
I found three models that were modified,
  
  4766   Wed May 25 20:12:55 2011 JamieConfigurationLSCNew digital lockin added to LSC model/screen


   
        
            
 lsc-lockin-adl.png 
  4767   Thu May 26 17:10:21 2011 JamieConfigurationLSCNew digital lockin added to LSC model/screen


   
        
            
  
  4774   Tue May 31 16:07:57 2011 Larisa ThorneConfigurationElectronicsSeismometer Box Update (Continuation of this)
 
I plugged the circuit into the LISO
 SeisBoxLISOplot1.pdfSeisBoxLISOplot2.pdfSTS2diagram_original.pdf 
  4788   Mon Jun 6 17:22:09 2011 valeraConfigurationLSCClipping in the X arm 1064 um trans pathI
changed optics in the ETMX transmon path
to remove clipping (which made a false QPD
 XarmTransMon.pdf 
  4792   Mon Jun 6 23:56:16 2011 rana, valeraConfigurationSUSETMX/ETMY OSEM whitening We measured the OSEM PD whitening
transfer function of the ETMX OSEM UL whitening
stage (
  
  4812   Mon Jun 13 19:26:42 2011 Jamie, JoeConfigurationCDSSUS binary IO chassis 2 and 3 moved from 1X5 to 1X4While preping 1X4 for installation of c1lsc,
we removed some old VME crates that were
no longer in use.  This freed up lots
  
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