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ID Date Author Type Categoryup Subject Text Attachments
  5641   Mon Oct 10 10:14:43 2011 ranaUpdateLSClength fluctuations in SRCL How does it make sense that the motion
at 0.1 Hz of PRC is 10x larger than MICH?
  
  5643   Mon Oct 10 13:52:04 2011 kiwamuUpdateLSCRE: First attempt to estimate mode matching efficiency using interferometer

    

       
            
  
  5648   Tue Oct 11 03:35:16 2011 kiwamuUpdateLSCBS actuator reponse at low frequency : measuredThe response
of the BS actuator in a low frequency regime
 BSactuator.png 
  5649   Tue Oct 11 15:14:50 2011 ranaUpdateLSCBS actuator reponse at low frequency : measured

    

       
            
  
  5652   Tue Oct 11 19:11:25 2011 kiwamuUpdateLSCRe: BS actuator reponse at low frequency : measuredI think
the precision due to the loop gain uncertainty
  
  5653   Tue Oct 11 21:23:51 2011 JenneUpdateLSCArm absl lengths

    

       
            
  
  5654   Wed Oct 12 00:35:42 2011 kiwamuUpdateLSCTRY path realignedThe
TRY (TRansmitted light from Y arm ) path
was a bit realigned because there had been
  
  5656   Wed Oct 12 17:53:01 2011 kiwamuUpdateLSCBS actuator response : fitting done and histroy of delaysAn
update on calibration of the BS actuator
: A fitting has been done.
 bode_BSactuator.png 
  5659   Thu Oct 13 03:22:53 2011 kiwamuUpdateLSCmeasurement of sensing matrix : just began- status update on LSC activity :
The
measurement of the LSC sensing matrix has
  
  5664   Thu Oct 13 23:58:38 2011 KojiUpdateLSCfixing REFL165 I already have reported in
this entry that REFL165 shows too high
DC output which does not depend on the light
 PA131612.jpgPA131618.jpg 
  5665   Fri Oct 14 04:35:45 2011 kiwamuUpdateLSClocking tonightThe
lock of DRMI wasn't stable enough to measure
the sensing matrix. Failed. 
 Screen_shot_2011-10-14_at_4.24.01.png 
  5671   Sat Oct 15 16:42:08 2011 KojiUpdateLSCTesting REFL165  Test results of new REFL165 (the
first attachment)
- The resonant freq 166.2MHz, 
 REFL165_test_111014_KA.pdfREFL165_transimpedance2.pdf 
  5672   Sat Oct 15 17:06:20 2011 KojiUpdateLSCInstallation REFL165 REFL165 was installed on the AP table last
night.
Meanwhile I found the DC power level
  
  5678   Mon Oct 17 11:40:44 2011 KojiUpdateLSCREFL165 removed from the tableREFL165 removed from the table for the
C(V) test
  
  5681   Mon Oct 17 22:20:42 2011 KojiUpdateLSCREFL165 removed from the table

    

       
            
  
  5684   Tue Oct 18 04:04:27 2011 kiwamuUpdateLSCmeasurement of sensing matrix : touchy SRMI made
some attempts to measure the sensing matrix
  
  5685   Tue Oct 18 10:04:41 2011 KojiUpdateLSCREFL165 removed from the tableThe original REFL165 had ~50MHz/A dependence
on the DC photocurrent.
The resistr R21, which was 2670 Ohm
 REFL165_original.pdfREFL165_new.pdfREFL165_schematic_111017_KA.pdf 
  5703   Wed Oct 19 17:21:16 2011 KojiSummaryLSCModification on the RFPD interface cardsI have modified all of the three RFPD interface
cards to be enabled permanently.
This
 D990543-B_mod.pdf 
  5709   Thu Oct 20 04:47:37 2011 kiwamuUpdateLSCclipping search round 1[Koji / Kiwamu]
 
We tried finding a possible clipping in the
  
  5743   Wed Oct 26 20:30:47 2011 KatrinUpdateLSCPOX11 and POP55 installed[Katrin,Jenne]
RF photo diodes POP55 and POX11 are
installed. The beams are aligned to the photo
  
  5744   Wed Oct 26 23:03:03 2011 kiwamuUpdateLSCRF distribution box : two more 55MHz availableThe RF distribution
box has been modified so that it generates
  
  5746   Thu Oct 27 16:09:37 2011 kiwamuUpdateLSCRF distribution box : two more 55MHz availableThe diagram of the RF distribution box
has been updated according to the modification
( #5744).
 RF_Distribution_Box.png 
  5747   Thu Oct 27 18:00:38 2011 kiwamuSummaryLSCOffsets in LSC signals due to the RFAMs : Optickle simulationThe amount
of offsets in the LSC signals due to the
 ratio.pngupper.pngPRCL_200.pngMICH_200.pngSRCL_200.png 
  5752   Fri Oct 28 03:42:50 2011 kiwamuUpdateLSCITMX table needs to be refined(POX)
The POX beam had been 80% clipped
at a black glass beam dump of the POX11 RFPD.
 ITMXtable.png 
  5753   Fri Oct 28 04:57:00 2011 kiwamuUpdateLSCPOX11 demod board brokenThe POX11 demodulation
board is broken. It needs to be fixed in
 Screen_shot_2011-10-28_at_2.26.02.png 
  5754   Fri Oct 28 05:17:13 2011 kiwamuUpdateLSClocking activity : PZT1 is still railing Status update on the LSC activity:

 To see how good/bad the beam
  
  5760   Fri Oct 28 20:39:19 2011 MIrkoUpdateLSCRFAM monitor in place. ( Uncalibrated ) EPICS troubles{Suresh, Jamie, Mirko]
We adapted the Stochmon box to include
LP filters at 1.8Hz behind the RMS parts.
 MC_DC11MHz.mMC_DC29MHz.mMC_DC55MHz.mRFAMPD.c 
  5762   Sat Oct 29 05:50:44 2011 kiwamuUpdateLSCMC suspensions misaligned to avid railing for PZTsI have shifted the alignment of the MC
suspensions such that the PZT won't rail.
Since I didn't care of the spot positions
 MCalignOct282011.pngOct282011.png 
  5763   Sat Oct 29 22:57:03 2011 MirkoUpdateLSCAM modulation due to non-optimal SB frequency[Kiwamu, Mirko]
Non-optimal 11MHz SB frequency causes
PM to be transformed into AM.
 IMC.pdf 
  5773   Mon Oct 31 21:46:32 2011 kiwamuUpdateLSCDependence of Recycling gain on incident beam pointingI
horizontally swept the translation of the
incident beam in order to investigate a possible
 beam_scan_PRCL.png 
  5774   Tue Nov 1 13:41:38 2011 MirkoUpdateLSCAM modulation due to non-optimal SB frequency


   
        
            
 IMC.pdf 
  5788   Wed Nov 2 19:32:20 2011 kiwamuUpdateLSCPOP22/110 installed[Steve / Kiwamu]
 The
POP22/110 RFPD has been installed. It is
  
  5794   Thu Nov 3 14:25:52 2011 kiwamuUpdateLSCPDA10A as POP22/110 : too small signalIt
turned out that the signal was too small
with PDA10A to detect the 22 and 110 MHz
  
  5796   Thu Nov 3 16:31:47 2011 kiwamuUpdateLSCPDA10CF as POP22/110 : betterThe
POP22/110 RFPD has been replaced by PDA10CF.
As a result the 22 and 110 MHz signals became
  
  5801   Thu Nov 3 18:41:36 2011 kiwamuUpdateLSCPOX11 demod board : haven't been modified yetI
pulled out the POX11 demod board and found
the power splitter on the board hadn't been
  
  5802   Thu Nov 3 19:58:18 2011 kiwamuUpdateLSCPOX11 demod board : modification doneThe modification
on the POX11 demod board has been successfully
 POX11demod.png 
  5804   Fri Nov 4 00:13:24 2011 KojiUpdateLSCXARM locked with POX11XARM lock was achieved by POX11_I
Summary:
- The  whitening gains of POX11_I
 POX11.pdf 
  5806   Fri Nov 4 05:24:56 2011 kiwamuUpdateLSCoffset introcuded in MC and IFO-configure script modified[Offsets in MC]
 I have introduce an offset
in MC2 PIT because the PZT1 again started
  
  5812   Fri Nov 4 15:26:54 2011 JenneUpdateLSCLSC model recompiledI moved the place where we take the OAF
Degree of Freedom signals from - now it's
the error point rather than the feedback
  
  5832   Mon Nov 7 15:15:21 2011 JenneUpdateLSCLSC model recompiled

    
        
  
  5833   Mon Nov 7 15:43:25 2011 jamieUpdateLSCLSC model recompiled

    

       
            
  
  5849   Wed Nov 9 14:49:07 2011 kiwamuSummaryLSCCharacterization of the Power Recycled MichelsonEDIT
by KI:
 contour_loss.pngcontour_MM.png 
  5851   Wed Nov 9 16:29:36 2011 KojiSummaryLSCCharacterization of the Power Recycled MichelsonDifficult to understand.
The mode matching does not change
the recycling gain. It changes the coupling
  
  5875   Fri Nov 11 14:55:47 2011 kiwamuSummaryLSCCharacterization of the Power Recycled Michelson : take 2

    

       
            
 rec_gain.pngrefl.pngpbu.pngMM.pngloss.png 
  6027   Mon Nov 28 16:51:57 2011 kiwamuUpdateLSCmodulation frequency resetI reset the modulation frequency to 11065910
Hz (#5530).
It had been at 11065399 Hz probably since
  
  6072   Mon Dec 5 19:21:55 2011 kiwamuUpdateLSCcoarse beat note signal : ADC limited above 30 HzThe
signal observed by the coarse frequency discriminator
was actually dominated by the ADC noise above
 Yarm_ALS_coarse.png 
  6074   Tue Dec 6 00:26:00 2011 kiwamuUpdateLSCALS became robust : UGF = 100 HzEventually
the instability in the Y end PDH servo turned
out to be some kind of an alignment issue.
  
  6150   Mon Dec 26 14:01:45 2011 kiwamuUpdateLSCmultiple-LOCKIN newly addedThe multiple
LOCKIN module has been newly added on the
 multiple-lockin.png 
  6151   Tue Dec 27 16:56:15 2011 kiwamuUpdateLSCScmitt trigger installedThe old
trigger system has been replaced by Schmitt
 trigger_time_series.pngtrig_mat.pngmodel_trigger_edit.png 
  6152   Tue Dec 27 22:17:56 2011 kiwamuUpdateLSCmultiple-LOCKIN new screensSome
new screens have been made for the new multiple-LOCKIN
system running on the LSC realtime controller.
 Untitled.png 
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