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ID Date Author Type Categoryup Subject Text Attachments
  5061   Fri Jul 29 16:04:51 2011 steveUpdateSUSETMX, PRM & SRM OSEM gains setJamei fixed the computer. Now I had a healthier
ETMX with SIDE signal that allowed me to
set gains to get Q of 5
  
  5082   Mon Aug 1 16:06:05 2011 steveUpdateSUSoplevs are centeredKiwamu, Koji and Steve,
Arm aligned separatly and oplev qpds
were centered  including BS. Than we
  
  5091   Tue Aug 2 11:02:52 2011 JenneUpdateSUSPRM Watchdog trippedI found PRM watchdog tripped.  It's
all better now.
  
  5098   Tue Aug 2 23:02:48 2011 NicoleUpdateSUSFixed Accelerometer

 
 shakerposts.jpgnewclips.jpgclipstoamplifier.jpg 
  5099   Tue Aug 2 23:14:21 2011 NicoleUpdateSUSCorrected Screw Alignment in TT Suspension BaseThe TT suspension base was not able to
be securely mounted to the optical table
(i.e. mounted with 4 screws)
 newholes.jpgmountedmirrorflash.jpg 
  5107   Wed Aug 3 12:27:01 2011 NicoleSummarySUSWeekly SummaryThis week I have determined the linear
region for my photosensor. I have determined
the linear region to be -14.32 V/cm in the
 calibrationplot.jpgcalibrationplot.jpgcalibrationplot.jpgnewholestobe.JPG 
  5108   Wed Aug 3 12:37:57 2011 KojiSummarySUSWeekly SummaryI vote for making an adapter plate between
the sliding plate and the bottom base.

  
  5109   Wed Aug 3 14:20:49 2011 steveUpdateSUSITMX and PRM damping restoredITMX watchdog tripped around 5 Torr 
and the PRM around 450 Torr of this vent.
They were restored than.
  
  5116   Thu Aug 4 08:25:51 2011 steveUpdateSUSsus at atmITMX and PRM moved alot.  BS and  
ITMY just a little based on oplev reference.
 SUSatm.pngoplevsaftervent.png 
  5118   Thu Aug 4 11:18:12 2011 ranaUpdateSUSsus at atmRemember that the Oplevs are not good references
because of the temperature sensitivity. The
week long trend shows lots of 24 hour fluctuations.
  
  5119   Thu Aug 4 20:05:23 2011 NicoleUpdateSUSNew Horizontal Sliding Base Mount for TT suspension testingIn order to more-securely mount the TT
supsion to the horizontal sliding base, I
have made a sub-mounting plate (upon Koji's
 topplateview.jpgplatform.jpglasersetup.jpg 
  5123   Fri Aug 5 13:51:51 2011 steveUpdateSUScross couplingWe need a plan how to minimize cross coupling
in the OSEMs now
  
  5125   Fri Aug 5 15:11:24 2011 kiwamuUpdateSUSRe: cross couplingThere is a page on the 40m wiki explaining
the procedure.
 
  
  5138   Mon Aug 8 12:08:05 2011 ranaUpdateSUSsus at atm   Untitled.png 
  5141   Mon Aug 8 15:20:49 2011 kiwamuUpdateSUSinspection on ETMY (round 1)Since
ETMY have been showing some strange behaviors
we deeply inspect the ETMY suspension.
 Screen_shot_2011-08-08_at_15.08.23.png 
  5145   Mon Aug 8 22:12:58 2011 NicoleSummarySUSDaily SummaryToday I balanced the mirror, finished putting
together the second photosensor, and finished
my photosensor circuit box! 
 frontview.jpgfrontview.jpg 
  5146   Tue Aug 9 01:35:45 2011 SureshUpdateSUSETMX Side Sensor slow channel down for a long timeThe slow signal from the side sensor on
ETMX was last seen in action sometime in
May 2010!  And then the frame builder
 ETMX-SDSEN_trend1.pngETMX_SDSEN_trend2.png 
  5147   Tue Aug 9 02:03:16 2011 kiwamuSummarySUSsummary of today's work on ETMY[Rana / Jenne / Kiwamu]
The
ETMY suspension tower is currently sitting
  
  5150   Tue Aug 9 02:44:32 2011 SureshUpdateSUSETMX free swinging dataI switched off damping to the ETMX and
used a reduced version of  freeswing-all.csh
script (called freeswing-ETMX.csh) to set
 ETMX_freeswing.png 
  5153   Tue Aug 9 11:33:33 2011 kiwamuUpdateSUSRe: ETMX free swinging dataI believe that the 17 Hz broad structure on
SIDE is just because of a bad rotational
  
  5154   Tue Aug 9 13:34:40 2011 NicoleSummarySUSNew Calibration Plots for PhotosensorsHere are the new calibration plots for
my photosensors. These calibrations were
done using a translation stage.
 ps1.jpgps2.jpg 
  5160   Tue Aug 9 19:53:56 2011 NicoleSummarySUSWeekly SummaryThis week, I have finished assembling everything
I need to begin shaking. I built an intermediary
mounting stage to mount the TT suspension
 entiresetup.jpg 
  5161   Wed Aug 10 00:11:39 2011 jamieUpdateSUScheck of input diagnolization of ETMX after OSEM tweakingSuresh and I tweaked the OSEM angles in
ETMX yesterday.  Last night the ETMs
were left free swinging, and today I ran
 ETMX.png 
  5163   Wed Aug 10 01:40:40 2011 KojiUpdateSUSETMY exploration[Rana Koji Jenne Jamie]
- The situation of the ETMY suspension
is improved.
  
  5164   Wed Aug 10 02:29:38 2011 JenneUpdateSUSETMY exploration


   
        
            
  
  5166   Wed Aug 10 07:59:33 2011 steveUpdateSUSthis is too dam nice

    

       
            
  
  5169   Wed Aug 10 12:32:09 2011 NicoleSummarySUSWeekly Summary UpdateLast night, I attached a metal plate to
the Vout faceplate of my photosensor circuit
box because the BNC connection terminals
  
  5176   Wed Aug 10 15:39:33 2011 jamieUpdateSUScurrent SUS input diagonalization overviewBelow is the overview of all the core IFO
suspension input diagonalizatidons.
Summary: ITMY,
 7x 
  5177   Wed Aug 10 18:25:45 2011 JenneUpdateSUSETMY mini-update[Jenne, Jamie]
ETMY is now in its new nominal position,
according to the rails that Kiwamu put in
  
  5178   Wed Aug 10 19:18:26 2011 NicoleSummarySUSFixed Reflective Photosensors; Recalibrated Photosensor 2Thanks to Koji's help, the second photosensor,
which was not working, has been fixed. I
have re-calibrated the photosensor after
 ps2.jpg 
  5183   Thu Aug 11 06:45:14 2011 NicoleSummarySUSShaking TestingKoji and I have finished shaking the table for the
first round of measurements (horizontal shaking).
  
  5188   Thu Aug 11 12:31:39 2011 NicoleSummarySUSPhotosensor Head Calibration Curve for TT FrameI have re-calibrated the photosensor I
used to measure the displacements of the
TT frame (what I call "Photosensor 2").
 ps2frame.jpg 
  5191   Thu Aug 11 14:22:00 2011 NicoleSummarySUSPhotosensor Head Calibration Curve for TT Frame

    

       
            
  
  5192   Thu Aug 11 14:32:12 2011 KojiSummarySUSPhotosensor Head Calibration Curve for TT FrameThe entry was quite confusing owing to
many misleading wordings.
- The PS2 should be calibrated "as
  
  5194   Thu Aug 11 16:07:37 2011 steveUpdateSUSETMY rack cables strain releived   P1080159.JPGP1080160.JPG 
  5195   Thu Aug 11 16:09:05 2011 NicoleSummarySUSBode Plot for TT SuspensionAll of my plots have already taken into
account the calibration of the photosensor
(V/mm ratio)
 6x 
  5198   Thu Aug 11 18:30:40 2011 KojiUpdateSUSITMY OSEM adjustment[Jamie, Koji]
ITMX
OSEMs were adjusted so as to have the right
  
  5199   Thu Aug 11 19:01:45 2011 SureshUpdateSUSITMX given a kick to start it freeswing' but to no avail.We started an ITMX freeswing run at this
time
Thu Aug 11 18:58:59 PDT 2011
  
  5203   Fri Aug 12 03:52:51 2011 kiwamuUpdateSUSPRM OSEM adjustment[Suresh / Kiwamu]
 We
  
  5204   Fri Aug 12 04:11:13 2011 kiwamuUpdateSUSfree swingingExcited all optics - -
Fri Aug 12 03:34:12 PDT 2011
997180467
  
  5205   Fri Aug 12 11:07:50 2011 NicoleSummarySUSMore TT Shaking Completed This MorningThis morning (about 10am to 11am), I have
collected additional transfer function measurements
for the T.T. suspension. I have finished
  
  5206   Fri Aug 12 14:15:07 2011 NicoleSummarySUSBode Plot for TT SuspensionHere is my bode plot comparing the flexibly-supported
and rigidly-supported EDCs (both with no
bar)
 EXPrigidvsflex.jpg 
  5207   Fri Aug 12 15:16:56 2011 jamieUpdateSUStoday's SUS overviewHere's an update of the suspensions, after
yesterdays in-vacuum work and OSEM tweaking:

    PRM and ETMY are completely
 SRM.pngITMY.pngBS.png 
  5208   Fri Aug 12 15:34:16 2011 NicoleSummarySUSBode Plot for TT Suspension

    

       
            
 RIGIDexp_model.jpgflexmodcomp.jpg 
  5209   Fri Aug 12 15:46:51 2011 JenneUpdateSUSEarthquake stop procedureAccording to Rana, the following is
the "new" (should always have been
used, but now we're going to enforce it)
  
  5215   Fri Aug 12 17:37:11 2011 JenneUpdateSUSETMY hopefully good again[Jamie, Jenne]
We went in to have a look-see at
ETMY since it looked stuck-ish.  Jamie
  
  5216   Fri Aug 12 20:28:13 2011 JenneUpdateSUSETMY hopefully good again


   
        
            
  
  5219   Sat Aug 13 01:54:18 2011 kiwamuUpdateSUSPRM OSEM adjustment part IIAdjustment  before.pngafter.png 
  5220   Sat Aug 13 02:11:33 2011 kiwamuUpdateSUSfree swinging againI am leaving all of the suspensions
free swinging. They will automatically recover
  
  5221   Sat Aug 13 02:31:42 2011 kiwamuUpdateSUSRe: ETMY hopefully good againI guess the ETMY suspension is still fine.
Their OSEM DC voltage and the free swinging
spectra look healthy.
  
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