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ID Date Author Type Categoryup Subject Text Attachments
  7740   Sat Nov 24 22:14:08 2012 KojiUpdateGeneralAP table cleaning upOn Wednesday (21st) night, I checked the
AP table as I wanted to try PRMI locking. 
It was difficult to work with the
 APTable121124.pdfAPTable121124.graffle.zip 
  7752   Tue Nov 27 03:26:00 2012 JenneUpdateGeneralPOP beam on POP55, POP camera

    

       
            
  
  7755   Tue Nov 27 17:45:42 2012 SteveUpdateGeneralspare optics of AP table moved to cabinetSpare optics from the AP table were moved
to glass cabinet in the east arm. I'm not
sure this is the right place. We'll see what
 IMG_1819.JPG 
  7765   Fri Nov 30 09:59:53 2012 SteveHowToGeneralHow not toClean cabinet S15 doors were left open.
You have to lock it up!
  
  7830   Fri Dec 14 03:49:02 2012 AyakaUpdateGeneralEarthquakeThere was an earthquake around 2:30 am.
Now all the mirrors except SRM are damped.
 earthquake.pngseis.pdf 
  7842   Mon Dec 17 20:22:07 2012 JamieUpdateGeneralVent plan: WE VENT TOMORROWWe will vent tomorrow
(12/18)
After lengthy discussion,
I have determined that we should vent now,
  
  7843   Mon Dec 17 21:33:45 2012 ManasaUpdateGeneralVent plan: WE VENT TOMORROW

    

       
            
  
  7845   Mon Dec 17 22:42:27 2012 KojiSummaryGeneralThe projector lamp ended its life?i just heard a rather large exploding sound
in the control room.
I tried to locate the source and found
  
  7846   Mon Dec 17 22:49:33 2012 ManasaSummaryGeneralThe projector lamp ended its life?

    

       
            
  
  7847   Tue Dec 18 00:45:19 2012 KojiSummaryGeneralThe projector lamp ended its life?...Nah.   
  7848   Tue Dec 18 07:03:40 2012 ManasaUpdateGeneralVent plan: WE VENT TOMORROW

    

       
            
  
  7860   Wed Dec 19 21:35:33 2012 KojiSummaryGeneralFirst Contact Training with Margot[Koji, Steve]
First
Contact Training with Margot
  
  7863   Thu Dec 20 12:14:19 2012 JamieUpdateGeneralproblem with in-vac wiring for TTsNic and I discovered a problem with the
in-vac wiring from the feed-thru to the top
of the table.  Pin 13 at the top of
  
  7864   Thu Dec 20 17:13:56 2012 JamieUpdateGeneralhow to deal with problem with in-vac wiring for TTsSo this is obviously a general problem
for all the TTs.  Our in-vacuum wiring
is unfortunately mirrored relative to that
  
  7865   Thu Dec 20 18:33:52 2012 JamieUpdateGeneralin-vac adapter cables for TTsWe need short cables that mirror the pins:
 invac-adapter-cable.pdf 
  7868   Fri Dec 21 09:55:23 2012 SteveUpdateGeneralin-vac adapter cables for TTs 
 Accu-Glass
is closed till Jan 2, 2013
 extensioncable.pdfgenderchanger.pdf 
  7885   Wed Jan 9 13:34:34 2013 KojiSummaryGeneralThe projector lamp ended its life?[Koji, Manasa]
- A new projector lamp installed.
- The old lamp lasted 8751 "equivalent
  
  7891   Fri Jan 11 11:07:04 2013 ManasaUpdateGeneralIFO status update - PMC problemsI came in this morning to see that the
PMC was down. The PZT voltage had drifted
to below 50V. I adjusted the FSS slow controls
  
  7892   Fri Jan 11 16:13:47 2013 JenneUpdateGeneralIFO status update - PMC fixed


   
        
            
  
  7930   Wed Jan 23 18:16:11 2013 ManasaUpdateGeneralLaseroptik mirror - SN6 I repeated the transmittance measurements
of LaserOptik SN6 @1064nm.
Transmittance for s-polarization 
 sn6_trans.png 
  7932   Wed Jan 23 20:24:05 2013 KojiUpdateGeneralLaseroptik mirror - SN6Got confused (even after I talked with
Manasa).
The plot shows the number ~0.01 or
  
  7935   Wed Jan 23 22:02:25 2013 ManasaUpdateGeneralLaseroptik mirror - SN6

    

       
            
  
  7940   Thu Jan 24 15:16:50 2013 ManasaUpdateGeneralLaseroptik mirror - SN6I repeated the transmittance measurements
of Laseroptik SN6 at 1064nm. The rotation
stage could only resolve 2 deg rotation (We
 sn6_trans1.png 
  7941   Thu Jan 24 16:23:24 2013 KojiUpdateGeneralLaseroptik mirror - SN6The mirror T is completely out of spec.
We should find or request the data sheet
of the mirror.
  
  7943   Thu Jan 24 16:34:56 2013 ranaUpdateGeneralLaseroptik mirror - SN6  I have two questions:
1) Are we sure that the T measurement
is not being compromised by some systematic?
  
  7944   Fri Jan 25 08:10:42 2013 SteveUpdateGeneralLaseroptik mirrors Here are the German plots. Unfortunately
they are not logarithmic. 
 Ed: Proprietary data removed.
  
  7947   Mon Jan 28 19:07:45 2013 ManasaUpdateGeneralSN6 Laseroptik mirror - Tranmittance measurementsI repeated the measurements using NPRO
instead of Crystalaser. I am attaching optical
layouts for these measurements for future
 sn6_trans0128.pngtrans_layout.png 
  7950   Mon Jan 28 21:36:44 2013 tall guyFrogsGeneralsmall people on noticeIf I catch anyone putting small booties
into the large bootie bin, I will make said
person eat small booties.
  
  7952   Tue Jan 29 10:59:37 2013 lazy personFrogsGeneralbetter plan 
 I propose we work around this
problem with giant
  
  7953   Tue Jan 29 14:20:02 2013 KojiUpdateGeneralFiner rotation stage for optics characterizationA rotation stage has been ordered.

  
  7955   Tue Jan 29 15:16:18 2013 ManasaFrogsGeneraltrial run 
 I would like to suggest a trial
run on these....Ergomates and 
 ErgoMatesFeatures.jpgbooties.jpg 
  7958   Tue Jan 29 20:28:11 2013 ericqUpdateGeneralEarly work on Mirror Mounts [Q, Chloe]
Chloe has been to the lab twice to
start up her investigations in acoustic noise
 early.pdf 
  7960   Wed Jan 30 03:01:55 2013 KojiUpdateGeneralEarly work on Mirror MountsI
can't believe that SR785 can have
such a low input noise level (<1nV/rtHz).
  
  7967   Wed Jan 30 16:24:25 2013 ManasaFrogsGeneraltrial run

    

       
            
  
  7989   Sun Feb 3 13:20:02 2013 KojiSummaryGeneralHypothesisRana mentioned the possibility that the
PR2 curvature makes the impact on the mode
stability. Entry
 mode_density_PRC.pdfmode_density_PRC.zip 
  7990   Mon Feb 4 10:45:51 2013 JamieSummaryGeneralrough analysis of aligned PRM-PR2 mode scanHere's a sort of rough analysis of the
aligned PRM-PR2 cavity mode scan.
On Friday we took some mode scan
 scan-labeled.pdf 
  7991   Mon Feb 4 11:10:59 2013 KojiSummaryGeneralrough analysis of aligned PRM-PR2 mode scanThe expected finesse is 100ish. How much
can we beleive the measured number of 50?
From the number we need to assume
  
  7992   Mon Feb 4 15:06:56 2013 KojiSummaryGeneralHypothesis

    

       
            
  
  7994   Mon Feb 4 19:33:19 2013 yutaSummaryGeneralrough analysis of aligned PRM-PR2 mode scan[Jenne, Yuta]

We redid PRM-PR2 cavity scan because
 3peakdata.png 
  7995   Mon Feb 4 19:48:32 2013 JamieSummaryGeneralarbcav recalc of PRC with correct ITM transmissionI noticed that Koji used a high reflector
for the ITMs for his full PRC arbcav calculation.
 I just redo it here with the correct ITM
 mode_density_PRC_2.pdfmode_density_PRC_3.pdf 
  7996   Mon Feb 4 22:46:03 2013 JamieSummaryGeneralarbcav for SRC with curved TTsI ran Zach's arbcav on our SRC with curved
TTs and the situation looks much worse than the PRC.
 mode_density_SRC_3.pdfmode_density_SRC_2.pdf 
  7997   Tue Feb 5 02:04:44 2013 yutaSummaryGeneralrough analysis of aligned PRM-PR2 mode scanI redid PRM-PR2 cavity scan using oscilloscope
to avoid anti-aliasing effect.
Measured 
 PRMPR2scan.png 
  7998   Tue Feb 5 03:16:51 2013 KojiSummaryGeneralrough analysis of aligned PRM-PR2 mode scan0.764 and 0.751 do not give us the stdev
of 0.005.
I have never seen any Yokogawa in
  
  8000   Tue Feb 5 10:09:08 2013 yutaSummaryGeneralrough analysis of aligned PRM-PR2 mode scanstdev of [0.764, 0.751] is 0.007, but what
we need is the error of the averaged number.
Statistical error of the averaged number
  
  8002   Tue Feb 5 11:30:19 2013 KojiSummaryGeneralrough analysis of aligned PRM-PR2 mode scanMakes sense. I mixed up n and n-1
Probability function: X = (x1 + x2
+ ... + xn)/n, where xi = xavg +/- dx
  
  8004   Tue Feb 5 15:31:03 2013 SteveUpdateGeneralclean assembly room benches cleaned upManasa, Jamie and Steve,
Tip-Tilts and parts moved into the
most north " 40m "  cabinet 
 IMG_0057.JPGIMG_0061.JPG 
  8005   Tue Feb 5 19:16:22 2013 JamieSummaryGeneralarbcav of PRC with +600 RoC PR2/3This is just a simple rerun of arbcav from
#7995
but with the PR2/3 RoCs set to 600, instead
 mode_density_PRC_3.pdfmode_density_PRC_2.pdf 
  8006   Tue Feb 5 19:32:47 2013 yutaSummaryGeneralPR2/PR3 flipping and PRC stabilityWe are considering of flipping PR2 and/or
PR3 to make PRMI stable because PR2/PR3 seems
to be convex.
 PRMI_PR2HR_PR3HR.pngPRMI_PR2AR_PR3HR.pngPRMI_PR2HR_PR3AR.pngPRMI_PR2AR_PR3AR.png 
  8012   Wed Feb 6 15:20:55 2013 yutaSummaryGeneralFWHM was wrongI have to blame Jamie for putting extra
2 randomly.
Measured PRM-PR2 cavity 
  
  8019   Wed Feb 6 22:39:23 2013 JamieUpdateGeneralPRC/arm mode matching with flipped PR2/PR3: coming soonI intended to post a long analysis of the
PRC/arm mode matching for the various TT
situations using Nic's a
  
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