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ID Date Author Type Categoryup Subject Text Attachments
  5487   Tue Sep 20 18:03:45 2011 PaulUpdateSUSITMY and SRM oplev calibrations - measured and estimatedThe measured calibration factors for the
oplevs are as follows:
 
SRM pitch: 666urad
  
  5488   Tue Sep 20 19:00:49 2011 PaulUpdateSUSITMY and SRM oplev calibrations - measured and estimated 
Kiwamu noticed that the 1/L in the
counts per radian should have just been L,
  
  5493   Wed Sep 21 00:34:29 2011 ranaUpdateSUSSUS diag stuff... just so I remember what I'm doingETMX was ringing up when it was mis-aligned
for Y arm locking. I restored the input matrix
to something more diagonal and its now damping
  
  5494   Wed Sep 21 00:37:01 2011 ranaUpdateSUSITMY and SRM oplev calibrations - measured and estimatedI found that some of the Optical Lever
Servos were ON today and injecting nonsense
into the interferometer optics. I have set
  
  5496   Wed Sep 21 09:10:15 2011 PaulUpdateSUSITMY and SRM oplev calibrations - measured and estimated

    

       
            
  
  5499   Wed Sep 21 14:44:25 2011 PaulUpdateSUSITMY and SRM open loop transfer functions 
 Here are the open loop transfer
functions for ITMY and SRM. The various settings
 ITMY_SRM_oplev_OLTFs.png 
  5500   Wed Sep 21 16:22:14 2011 ranaUpdateSUSSummary screenThe SUS SUMMARY screen is now fully   
  5501   Wed Sep 21 16:31:28 2011 PaulUpdateSUSITMY and SRM actuator response functions I divided the open loop transfer
functions by the filter response and the
sensor responses (previously measured calibration
 ITMY_PITCH_actuator_response.pngITMY_YAW_actuator_response.pngSRM_PITCH_actuator_response.pngSRM_YAW_actuator_response.png 
  5507   Wed Sep 21 23:05:16 2011 PaulUpdateSUSITMY and SRM actuator response functions - fitting results I used an fminsearch function to
fit the SRM and ITMY actuator response magnitudes.
The testfunction was just that for a single
 ITMY_PITCH_actuator_response_FIT.pngITMY_YAW_actuator_response_FIT.pngSRM_PITCH_actuator_response_FIT.pngSRM_YAW_actuator_response_FIT.png 
  5508   Wed Sep 21 23:25:51 2011 kiwamuUpdateSUSRe:ITMY and SRM actuator response functions - fitting resultsDid you take the 180 deg shift into your
account ?
Since your measurement was done when
  
  5509   Wed Sep 21 23:44:45 2011 PaulUpdateSUSRe:ITMY and SRM actuator response functions - fitting results

    

       
            
  
  5510   Thu Sep 22 00:00:10 2011 PaulUpdateSUSITMY and SRM actuator response functions - complex fitting resultsHere are the results of the complex fitting.
The residuals are bigger this time, but still
probably small enough to be ok(?), with the
 ITMY_PITCH_actuator_response_complex_FIT.pngITMY_YAW_actuator_response_complex_FIT.pngSRM_PITCH_actuator_response_complex_FIT.pngSRM_YAW_actuator_response_complex_FIT.png 
  5514   Thu Sep 22 10:43:50 2011 PaulUpdateSUSPower spectrum with different filter gains I thought it might be informative
before trying to optimise the filter design
to see how the current one performs with
 ITMY_YAW_closed_vs_open_noise.pdf 
  5517   Thu Sep 22 13:45:17 2011 PaulUpdateSUSETMX actuator response fitsFitting results: 
 Pitch
-- Fit completed after 305 iterations--
 Started
 ETMX_PITCH_actuator_response_complex_fit.pngETMX_YAW_actuator_response_complex_fit.png 
  5521   Thu Sep 22 17:48:20 2011 kiwamuUpdateSUSbad oplev on ETMYIt
turned out the oplev controls on ETMY were
just bad.
 OLETMY.png 
  5523   Thu Sep 22 20:12:54 2011 kiwamuUpdateSUSETMY oplev whitening engagedThe
whitening filters for the ETMY oplevs are
back.  
 OLETMY_WF.png 
  5532   Fri Sep 23 17:57:34 2011 PaulUpdateSUSOplev filter optimization for 2 poles and 2 zerosI have made a function to optimise
the overall gain, pole frequencies and zero
frequencies for the oplev filter. The script
 optimised2p2z_v1.pngoptimised2p2z_v1_TFs.png 
  5534   Sat Sep 24 01:21:11 2011 kiwamuUpdateSUSdamping test    
  5536   Sat Sep 24 01:51:02 2011 ranaUpdateSUSOplev filter optimization for 2 poles and 2 zeros


   
        
            
  
  5537   Sat Sep 24 02:09:43 2011 kiwamuUpdateSUSRe:Oplev filter optimization for 2 poles and 2 zerosGood work for the oplev noise simulations.
Here are some comments/questions:
 (A) The noise looks suppressed
  
  5540   Sat Sep 24 17:45:56 2011 PaulUpdateSUSRe:Oplev filter optimization for 2 poles and 2 zeros

    

       
            
  
  5544   Mon Sep 26 14:21:07 2011 kiwamuUpdateSUSITMX ULSEN shows jumps

    
        
 ITMXspectra.pngITMX-sensors.png 
  5546   Mon Sep 26 15:54:46 2011 kiwamuUpdateSUSITMX ULSEN shows jumpsCurrently the damping
of the ITMX suspension is intentionally disabled
  
  5547   Mon Sep 26 16:42:08 2011 kiwamuUpdateSUSITMX ULSEN : fixedThe
issue on the ITMX UL sensor has been fixed.
 connection.pngITMXsensors.png 
  5554   Tue Sep 27 08:51:29 2011 PaulUpdateSUSOplev filter optimization for 2 poles and 2 zeros

    

       
            
  
  5559   Tue Sep 27 20:02:19 2011 KojiUpdateSUSWatchdog rearmedI came to the control room and found the
PMC and IMC were unlocked. ==> Relocked
I found the watch dogs of the vertex
  
  5560   Wed Sep 28 00:06:21 2011 JenneUpdateSUSWatchdog rearmed

    

       
            
  
  5562   Wed Sep 28 07:36:41 2011 steveUpdateSUSITMY damping restoredITMY suspention damping restored   
  5563   Wed Sep 28 07:46:42 2011 steveUpdateSUSDsub connections at the back of 1X5 are fixed 
 I'm turning  the sus damping 
off for Dsub connection fix at  the
  
  5587   Fri Sep 30 17:01:29 2011 steveUpdateSUSETMX oplev intensity effect on noiseKiwamu and Steve,
This is one of the better oplev set
up we have. Single bounce from TM, no mirror
 ETMXoplintens.jpgP1080267.JPG 
  5594   Sun Oct 2 02:21:27 2011 kiwamuUpdateSUSfree swinging test once moreThe following optics were kicked:
MC1 MC2 MC3 ETMX ETMY ITMX ITMY PRM
SRM BS
  
  5597   Sun Oct 2 18:33:36 2011 kiwamuUpdateSUSinversion of the input matrix on ETMX, ITMX and PRMThe input
matrices of ETMX, ITMX and PRM have been
 ETMX.pngPRM.pngITMX.png 
  5600   Mon Oct 3 13:04:12 2011 JenneUpdateSUSAUXEX, AUXEY rebooted


   
        
            
  
  5601   Mon Oct 3 14:05:41 2011 JenneUpdateSUSFailing to set SUS summary screen valuesI assume it's because the burt restore
didn't work for the SUS summary screen, but
all of the values for the ifo suspensions
  
  5604   Mon Oct 3 17:27:23 2011 JenneUpdateSUSFailing to set SUS summary screen values

    

       
            
  
  5618   Tue Oct 4 19:31:17 2011 kiwamuUpdateSUSPRM and BS oplev laser diedThe
He-Ne laser which has been used for the PRM
and BS oplevs were found to be dead. 
 oplevs.png 
  5620   Wed Oct 5 11:33:25 2011 steveUpdateSUSPRM and BS oplev laser replaced 
JDSU 1103P died after 4 years of
service. It was replaced with new identical
  
  5622   Wed Oct 5 17:08:49 2011 steveUpdateSUSBS oplev spectraKiwamu and Steve,
The He/Ne oplev shows no coherece
so relative intensity noise is not limiting
 BSoplservON2.png 
  5630   Fri Oct 7 14:04:48 2011 steveUpdateSUSHe/Ne intensity noise effect on oplevsThe SRM bounce peak 18.33 Hz. Suresh helped
me to retune filter through Foton, but we
failed to remove it.
 7x 
  5633   Fri Oct 7 22:31:53 2011 kiwamuUpdateSUSnoisy ULSEN on ETMYYesterday
Koji was claiming that the rms monitor of
ULSEN on ETMY didn't well go down.
 ETMY_OSEMs.png 
  5636   Fri Oct 7 23:23:05 2011 kiwamuUpdateSUSSRM oplev was oscillatingThe SRM oplevs were found to be oscillating
because of a small phase margin.
I reduced the gains to the half of
  
  5645   Mon Oct 10 16:32:18 2011 steveUpdateSUSUL sensor of ETMY is recovered I lost UL osem voltage this morning
when I was checking the actual connection
at rack ETMY
 ETMY_UL.pngETMY_OSEM_UL.pngnoisyETMY_UL.png 
  5655   Wed Oct 12 08:43:30 2011 steveUpdateSUSITMX oplev improved a bit Atm2 is before optical path adjustment.
The idea was to remove possible clipping
in vacuum.
 ITMXoplev.pngITMXoplevservo_ON.png 
  5660   Thu Oct 13 14:23:09 2011 steveUpdateSUSITMX oplev with 3 mm beam on qpd I replaced the JDSU-Uniphase 1125P
by 1103P He/Ne laser. This new laser had
2.8 mW output yesterday. It degraded to 0.5
 ITMXoplev1103p#2.pngITMXoplev.png 
  5666   Fri Oct 14 16:20:11 2011 ZachUpdateSUSC1:SUS-ETMX_SPDMon fixedI offered to help Kiwamu with some of the
40m work. The first task was to figure out
why the ETMX side OSEM monitor was so low,
 board_works.pngrut_roh_raggie.pngScreen_shot_2011-10-14_at_4.09.45_PM.png 
  5667   Fri Oct 14 18:38:41 2011 kiwamuUpdateSUSC1:SUS-ETMX_SPDMon fixed

    

       
            
  
  5675   Mon Oct 17 07:57:24 2011 steveUpdateSUSETMX sus damping restored    
  5680   Mon Oct 17 17:07:30 2011 steveUpdateSUSETMX oplev returning beam od 3 mm ETMX oplev had 6 mm diameter beam
on the qpd.  I relayed the beam path
with 2 lenses  to get back  3 mm
 ETMX-oplev.jpg 
  5690   Wed Oct 19 04:23:58 2011 kiwamuUpdateSUSSRM free swinging testThe following optics were kicked:
SRM
Wed Oct 19 04:22:53 PDT 2011
  
  5691   Wed Oct 19 05:15:44 2011 kiwamuUpdateSUStaking care of SRMI
made some efforts to fix the situation of
SRM but it is still bad.
 f2pSRM.png 
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