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ID Date Author Type Category Subject Text Attachments
  8112   Tue Feb 19 19:55:52 2013 yutaUpdateIOOMC yaw input tuned[Jenne, Manasa, Yuta]

Since we levelled IMC stack, we had
 MCdecenter_19Feb2013.png 
  8111   Tue Feb 19 17:14:56 2013 ChloeUpdate QPD CircuitI finished working out the circuit and
figured out where the broken connections
were. This is diagrammed in my notebook (will
  
  8110   Tue Feb 19 15:40:34 2013 CharlesUpdateISSISS PrototypeAfter spending a good deal of time learning
how to use the SR785, I was able to characterize
my prototype circuit. The transfer function
 Prototype_Transfer_Function.pngTheoretical_Transfer_Function.png 
  8109   Tue Feb 19 15:10:02 2013 JamieUpdateCDSc1iscex alive againc1iscex is back up.  It is communicating
with it's IO chassis, and all of it's models
(c1x01, c1scx, c1spx) are running again.
  
  8108   Tue Feb 19 12:02:00 2013 JamieUpdateIOOIMC table levelling.In order to address the issue of low MC1
OSEM voltages, Yuta and I looked at the IMC
table levelling.  Looking with the bubble
 Screenshot-Untitled_Window.png 
  8107   Tue Feb 19 09:37:23 2013 SteveUpdateIOOlow MC1 OSEM voltage 
    See TT DB25 pin swapping  
elog#7869 
 MC1_MC3.pngMC1_MC3_.png 
  8106   Tue Feb 19 08:42:31 2013 KojiUpdateVACETMX door open[Steve, Yuta, Koji]
The ETMX heavy door was removed.
  
  8105   Tue Feb 19 08:06:02 2013 yutaUpdateElectronicsPOP path set up but AS55 is brokenI didn't use LED flash light. We learned
from the past (elog
#7355). I checked that POP55 and REFL55/165/33/11
  
  8104   Tue Feb 19 05:42:28 2013 KojiUpdateElectronicsPOP path set up but AS55 is broken10010 Ohm for POP55 vs 50 Ohm for AS55
(cf. http://nodus.ligo.caltech.edu:8080/40m/4763)
I
  
  8103   Tue Feb 19 02:23:40 2013 yutaBureaucracyGeneralaction items for PRFPMIThese are things need to be done for demonstrating
PRFPMI using ALS.
All of these should be done before
  
  8102   Tue Feb 19 00:21:09 2013 yutaUpdateElectronicsPOP path set up but AS55 is brokenHmm......  
I thought AS55 is broken because it
was not responding to the AS beam nor flashlight
  
  8101   Mon Feb 18 23:41:15 2013 SendhilUpdateAlignmentAligned IPPOS, IPANG and OPLEVS[Yuta, Sendhil]
We aligned IPPOS, IPANG and all OPLEVs
(except for ETMX and SRM).
 IPANGIPPOSoplevs.png 
  8100   Mon Feb 18 21:43:05 2013 KojiUpdateAlignmentPOP path set up but AS55 is brokenI undertook the investigation of the AS55
PD.
I found the PD is not broken.
 AS55.pdf 
  8099   Mon Feb 18 18:28:01 2013 yutaBureaucracyAlignmentwe are going to pump downWe
will start preparing for pumping down. Main
goal for this is to demonstrate PRFPMI using
  
  8098   Mon Feb 18 11:54:15 2013 Max HortonUpdateSummary PagesTiming Issues and CalendarsCrontab: The bug of data only plotting
until 5PM is being investigated.  The
crontab's final call to the summary page
  
  8097   Mon Feb 18 00:03:46 2013 ZachUpdateComputer Scripts / ProgramsARBCAV v3.0I have uploaded ARBCAV v3.0 to the SVN.   
  8096   Sun Feb 17 19:27:19 2013 ranaUpdateSUSPRM coil balanced I will check out the AS55 situation
tomorrow. Just put it on my desk.
MC Autolocker was disabled
  
  8095   Sat Feb 16 19:23:17 2013 yutaUpdateLSCPR2 flipped PRMI lockedIt is my pleasure to announce that the
first lock of PR2 flipped PRMI was succeeded.
  
  8094   Sat Feb 16 18:32:01 2013 yutaSummaryRF Systemphase tracker: OLTFI measured openloop transfer function of
the phase tracking loop for the first characterization
of phase tracker.
 BEATXFINEPHASE_OLTF.pngBEATYFINEPHASE_OLTF.pngphasetracker.png 
  8093   Sat Feb 16 17:27:26 2013 yutaUpdateSUSPRM coil balancedPRM coil gains and f2a filters are adjusted
for PRMI work.
It seems like 
 PRM_f2a.png 
  8092   Fri Feb 15 21:22:29 2013 yutaUpdateElectronicsAS55 replaced with POP55 PDI temporarily replaced AS55 PD with PD
labeled "POP55(POY55)".
I think POP55 is working because I
  
  8091   Fri Feb 15 20:07:28 2013 yutaUpdateAlignmentPOP path set up but AS55 is broken[Manasa, Yuta]

We set up POP camera and POPDC PD,
  
  8090   Fri Feb 15 17:11:13 2013 ChloeUpdate QPD circuit pictures I took better pictures of the circuits
of the QPD and spent a couple of hours with
a multimeter trying to figure out how all
 IMG_0337.JPGIMG_0338.JPG 
  8089   Fri Feb 15 16:09:19 2013 KojiUpdateGeneralbeam traps ready to be installedFor the hexagonal one, insert one of the
glass plate only half. Use a 1"x.5"
piece if exists.
 HexBeamDump.pdfDiamondBeamDump2in.pdf 
  8088   Fri Feb 15 15:21:07 2013 JamieUpdateComputersc1iscex IO-chassis deadI appears that the c1iscex IO-chassis is
either dead or in a very bad  state. 
The PCIe interface card in the IO-chassis
  
  8087   Fri Feb 15 09:58:49 2013 SteveUpdateGeneralbeam traps ready to be installedBlack-green glass traps are ready for light
in vacuum. I can assemble more if needed.
These three sizes are available.
 IMG_0083.JPGIMG_0084.JPG 
  8086   Fri Feb 15 01:51:43 2013 JenneSummaryAlignmentIFO aligned and ready for PRMI locking 
Yuta and Manasa, you guys are awesome!
Small, inconsequential point: 
  
  8085   Fri Feb 15 01:41:02 2013 Manasa, YutaSummaryAlignmentIFO aligned and ready for PRMI locking[Yuta, Manasa, Jenne, Jamie, Steve]
IFO aligned and ready for
  
  8084   Thu Feb 14 10:42:41 2013 JamieSummaryAlignmentMMT, curved TTs does not explain beam ellipticity at FaradayAfter using alamode to calculate the round-trip
mode of the beam at the Faraday exit after
retro-reflection form the PRM, I'm not able
 T.pdfS.pdf 
  8083   Thu Feb 14 08:29:41 2013 SteveUpdateIOOlow MC1 OSEM voltageMC1 -  LR, LL, UL & UR  OSEMs
should be adjusted to get  1.2V
 Feb14_2013.png 
  8082   Thu Feb 14 00:10:12 2013 yutaSummaryAlignmentREFL is not clippedLet's wait for astigmatism calculation.

In either case(clipping or astigmatism),
  
  8081   Wed Feb 13 22:09:26 2013 JenneUpdateAlignmentREFL is not clippedWe need to calculate whether this level
of astigmatism is expected from the new active
TT mirrors, but 
  
  8080   Wed Feb 13 19:41:07 2013 yutaSummaryGeneralpossible explanations to oval REFL beamWe checked that REFL beam is already oval
in the vacuum. We also centered in-air optics,
including lens, in the REFL path, but REFL
  
  8079   Wed Feb 13 19:30:45 2013 KojiSummaryGeneralpossible explanations to oval REFL beam>> "What has changed since:"
Recently
the REFL path has been rearranged
  
  8078   Wed Feb 13 19:09:32 2013 yutaSummaryGeneralpossible explanations to oval REFL beam[Jenne, Manasa, Jamie, Yuta]

The shape of the REFL beam reflected
 REFL_1044844506.bmp 
  8077   Wed Feb 13 16:31:08 2013 JenneUpdatePSLPMC pitch input tuned, MC yaw input tuned[Jenne, Yuta]
I looked at PMCR camera on the MC1
tv, and tweaked up the beam going into the
 MCspots_13Feb2013.png 
  8076   Wed Feb 13 14:21:19 2013 JenneUpdateLockingPRC cavity gains

    

       
            
  
  8075   Wed Feb 13 09:28:56 2013 SteveUpdateOpticsG&H - HR plots 
 Gooch & Housego optics
order specification from 03-13-2010
  
  8074   Wed Feb 13 01:26:08 2013 yutaSummaryGeneralrough analysis of aligned PRM-PR2 mode scanKoji was correct.

When you estimate the variance of
 unbiased.png 
  8073   Tue Feb 12 23:24:17 2013 yutaUpdateAlignmentIFO alignment in prep for in-air PRMI[Manasa, Yuta]

Lot's of alignment work, 
  
  8072   Tue Feb 12 23:22:14 2013 ManasaUpdateScatteringScattering setup 
 [Jan, Manasa]
We installed a camera at the ETMY
  
  8071   Tue Feb 12 20:57:47 2013 JenneUpdateAlignmentIFO alignment in prep for in-air PRMIWe should check MC spot positions to see
what they are. 
Also, I'm not thrilled about the
  
  8070   Tue Feb 12 20:42:36 2013 JamieUpdateAlignmentIFO alignment in prep for in-air PRMIYuta, Manasa, Jamie, Jenne, Steve, Rana
Starting this morning, we removed
the temporary half PRC mirror in front of
  
  8069   Tue Feb 12 18:28:46 2013 JamieSummaryOpticsCurvature radii of the G&H/LaserOptik mirrors

    

       
            
  
  8068   Tue Feb 12 18:25:43 2013 JamieSummaryGeneralhalf PRC with astigmatic PR2/3

    

       
            
  
  8067   Tue Feb 12 17:26:31 2013 ChloeUpdate QPD circuitry to test mount vibrations I spent awhile today reading about
op-amps and understanding what would be necessary
to design a circuit which would directly
  
  8066   Tue Feb 12 00:50:08 2013 yutaUpdateLockingPR2 oplev spectraI wanted to see if PR2 motion makes PRC
beam motion or not, using temporary oplev
to PR2.
 PR2oplev.png 
  8065   Tue Feb 12 00:14:00 2013 yutaUpdateLockingPRM coil balancingWe tried to lock half-PRC tonight, but
we couldn't. Why?? I could lock yesterday.
It locks for ~ 1 sec, but it beam
  
  8064   Mon Feb 11 21:03:15 2013 yutaUpdateLockingPR2-flipped half-PRC mode scanTo estimate the systematic effects to the
g-factor measurement, I changed how to analyze
the data in multiple ways.
 modespacing_pit.pngmodespacing_yaw.png 
  8063   Mon Feb 11 19:55:47 2013 ManasaUpdateOpticsG&H - AR Reflectivity  
I adjusted the focal length of the
focusing lens and reduced the beam size enough
  
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