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ID Date Author Type Categorydown Subject Text Attachments
  5435   Fri Sep 16 16:29:05 2011 kiwamuUpdateSUSf2a filters on SRMNew f2a filters
were installed on SRM.
 F2ASRM_Sep16.png 
  5436   Fri Sep 16 16:34:54 2011 PaulUpdateSUSITMY SRM oplev telescope planI've calculated a suitable collimating
telescope for the ITMY/SRM oplev laser, based
on the specs for the soon-to-arrive 2mW laser
 ITMY_SRM_telescope.png 
  5437   Fri Sep 16 17:09:07 2011 PaulUpdateSUSITMX oplev plan I just drew a basic picture of how
the ITMX oplev path could be reworked to
minimise the number of optics in the path.
 ITMX_oplev_plan.png 
  5438   Fri Sep 16 17:16:15 2011 JenneUpdateSUSInput matrix diagonalization: Fail![Jenne, Anamaria]
I put the new matricies in from the
free swinging test for the: ITMX, ITMY, ETMX,
  
  5439   Fri Sep 16 17:46:13 2011 kiwamuUpdateSUSSome screens fixedThe
bad medm screens have been fixed. There are
no blank fields and all the links are correct.
  
  5442   Fri Sep 16 22:11:21 2011 PaulUpdateSUSITMY transfer functionFirst of all I moved the lenses on the
ITMY/SRM oplev path to get a smaller spot
size on the QPDs. I couldn't get the beam
 ITMY_osem_to_oplev_TF.pdf 
  5443   Fri Sep 16 22:51:52 2011 PaulUpdateSUSCalibration plan for the oplevs In order to estimate the amount of
noise that the oplevs are injecting into
the GW channel, we first need to calibrate
  
  5444   Fri Sep 16 23:22:36 2011 kiwamuUpdateSUSETMX input matrix : bad YAW-SIDE couplingWith the
new input matrix, it looks like YAW and SIDE
  
  5446   Sat Sep 17 02:07:10 2011 kiwamuUpdateSUSETMX input matrix : bad YAW-SIDE couplingExcited all the optics. They will be automatically
back after 5 hours.
Sat Sep 17 02:02:07 PDT 2011
  
  5448   Sun Sep 18 14:08:52 2011 ranaUpdateSUSCalibration plan for the oplevsWe don't need a high quality calibration
for the optical levers. ~50% accuracy is
fine.
  
  5452   Mon Sep 19 01:07:32 2011 kiwamuUpdateSUSf2a filters on ITMs and ETMXThe f2a filters
were installed on ITMs and ETMX.
 f2a_ITMX.pngf2aITMY.pngf2a_ETMX.png 
  5457   Mon Sep 19 12:23:30 2011 PaulUpdateSUSITMY and SRM oplev beam size reduced + next stepsI replaced the lenses that were there with
a -150mm lens followed by a +250mm lens.
This gave a significantly reduced beam size
  
  5458   Mon Sep 19 13:13:10 2011 PaulUpdateSUSITMY oplev available for use: SRM not for the moment I've got the bench set up for the
measurement of the beam spot change with
DC SRM alignment offsets. The ITMY oplev
  
  5460   Mon Sep 19 15:30:22 2011 PaulUpdateSUSSRM oplev OSEM yaw calibration curve I made the first measurements towards
oplev calibration measurements: calibrating
the oplevs in SRM YAW. The measurements seemed
 SRM_YAW_calib_curve.png 
  5461   Mon Sep 19 15:41:48 2011 JenneUpdateSUSSUS diag stuff... just so I remember what I'm doingThe following optics were kicked:
ETMX
Mon Sep 19 15:39:44 PDT 2011
  
  5465   Mon Sep 19 16:56:29 2011 PaulUpdateSUSSRM oplev pitch calibration Same measurements for SRM pitch (as
previously done for yaw in entry 5460) are
complete. The QPD is back in the path and
  
  5466   Mon Sep 19 17:45:39 2011 ranaUpdateSUSSome screens fixed


   
        
            
 Untitled.png 
  5467   Mon Sep 19 18:05:27 2011 ranaUpdateSUSSummary screen


   
        
            
 sussum.png 
  5468   Mon Sep 19 20:56:36 2011 PaulSummarySUSRemaining SRM and ITMY OSEMs calibrations 
I've now taken data for the pitch
and yaw calibrations for the OSEMs of SRM
 SRM_PITCH_calib_curve.pngSRM_YAW_calib_curve.pngITMY_PITCH_calib_curve.pngITMY_YAW_calib_curve.png 
  5471   Mon Sep 19 22:47:44 2011 JenneUpdateSUSSUS diag stuff... just so I remember what I'm doing The last person out tonight should
run the following scripts:
In Matlab: 
  
  5475   Tue Sep 20 03:12:14 2011 AnamariaUpdateSUSJenne's Scripts startedI followed Jenne's instructions, ran the
matrix filler script and then set the optics
to freeswing. Someone has to burt resture
  
  5476   Tue Sep 20 04:12:26 2011 JenneUpdateSUSJenne's Scripts started

    

       
            
  
  5477   Tue Sep 20 09:44:44 2011 JenneUpdateSUSJenne's Scripts started

    

       
            
  
  5479   Tue Sep 20 14:53:13 2011 JenneUpdateSUSJenne's Scripts started


   
        
            
  
  5480   Tue Sep 20 15:23:16 2011 JenneUpdateSUSfree swinging test in vacuum conditionThis is using data for the SRM from:  20
Sept 2011 03:20:00 PDT = 1000549215
You can see that there are still
 SRM.png 
  5481   Tue Sep 20 15:39:57 2011 KojiUpdateSUSfree swinging test in vacuum conditionCan't we use Yuta's auto-Q adjust script?
 http://nodus.ligo.caltech.edu:8080/40m/3723
Edit by KI :
  
  5485   Tue Sep 20 16:45:09 2011 JenneUpdateSUSSUS diag stuff... just so I remember what I'm doingHas the Q been checked?  Still
in progress...
  
  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
  
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