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  40m Log, Page 168 of 341  Not logged in ELOG logo
ID Date Authorup Type Category Subject Text Attachments
  5878   Fri Nov 11 22:07:43 2011 SureshUpdateIOOTried to recover the MC alignment of 4th Nov: partial success, PSL beam clippingI have recovered the yaw values pretty
much .  As the PZT1 rails in this direction
perhaps this is the more relevant of the
  
  5880   Sat Nov 12 02:27:00 2011 SureshUpdateComputersC1IOO front end suddenly froze. Was restarted remotely[Koji Suresh]
No one was messing with the c1ioo
or any other machine.   The medm
  
  5881   Sat Nov 12 02:44:18 2011 SureshUpdateComputersC1IOO front end suddenly froze. Was restarted remotely


   
        
            
  
  5883   Sat Nov 12 03:46:55 2011 SureshUpdateIOOMC WFS Servo: Open loop gain [Mirko, Suresh]
I closed the WFS loops and measured
the transfer function from IN2 to IN1 testpoints
 WFS1_PIT_servo_filtershape_20111111_1.pngWFS1_PIT_servo_OLG_20111111_1.pngError_signal_WFS1_PIT_20111111_1.png 
  5891   Tue Nov 15 00:00:15 2011 SureshUpdateIOOMC was realigned to remove beam clipping and to accommodate PZT1 range[Kiwamu, Suresh]
The MC was realigned to readjust
the input beam direction in pitch such that
  
  5892   Tue Nov 15 01:44:36 2011 SureshUpdateIOOMC WFS Servo: Open loop gain


   
        
            
 WFS1PIT_OL_gain.png 
  5899   Tue Nov 15 19:59:41 2011 SureshUpdateIOOWFS output matrix measured (open loop)


   
        
            
  
  5904   Wed Nov 16 08:57:08 2011 SureshUpdateIOOMC WFS Servo OLG data and fitsI measured the Transfer Functions between
from IN2 to IN1 on the WFS1PIT, WFS2PIT,
WFS1YAW and WFS2YAW servo loops. 
 WFS1PITservo.pngWFS2PITservo.pngWFS1YAWservo.pngWFS2YAWservo.png 
  5905   Wed Nov 16 09:21:56 2011 SureshUpdateIOOMC2 Shifted in Pitch, corrected by adjusting the pitch bias[Steve, Suresh]
    Steve went over
to the MC2 walkway and 
  
  5906   Wed Nov 16 10:08:17 2011 SureshUpdateIOOEffect of turning on the MC2_TRANS_PIT and YAW loops in ASCI turned on the two remaining loops in
the ASC system to see if we can lock.  
I put in some ones into the WFS_OUTPUT matrix
 WFS_OUTMATRIX.pngWFS_OUTMATRIX.pngWFS_servo_err_20111115.png 
  5910   Wed Nov 16 10:53:35 2011 SureshUpdateIOOMC2 Shifted in Pitch, corrected by adjusting the pitch bias


   
        
            
 C1IOO_MC_ALIGN.png 
  5925   Thu Nov 17 13:58:12 2011 SureshUpdateIOOMC unlocked and misaligned.


   
        
            
  
  5938   Fri Nov 18 01:12:14 2011 SureshUpdateCDSMC1 LR dead for > 1 month; now revived temporarily[Den, Mirko, Suresh]
    We were investigating
why there is no correlation between MC1 osem
  
  5943   Fri Nov 18 08:29:35 2011 SureshUpdateIOOHEPA air-flow effect on WFS.[Koji, Suresh]
    We investigated
the effect of airflow from the HEPA filters
 WFS_err_HEPA.pngWFS_err_mc2t_effect.png 
  5958   Sat Nov 19 06:04:43 2011 SureshUpdateIOOMC_WFS Servo: The MC2_TRANS_PIT and YAW loops switched ONWithout adding significant amounts of noise
to other WFS loops I have engaged the MC2_TRANS_PIT
and YAW loops. 
 WFS_OUTMx_Lastgood.pngWFS_OUTMATRIX_20111118.pngWFS_err_MC2T_on_OMx5_20111118.png 
  5989   Wed Nov 23 16:48:39 2011 SureshUpdateGeneralcable cleanup[Koji Suresh]
As part of the general lab clean
up we removed many unused BNC cables (long
  
  5990   Wed Nov 23 16:55:57 2011 SureshUpdateIOOMC realignedThe PSL alignment into the MC was too poor
for the autolocker to engage.  So retaining
the last coil slider settings on the MC_Align
  
  6015   Sat Nov 26 07:18:11 2011 SureshUpdateIOOMC WFS related changes to c1ioo modelWhat I did:
    I have changed
the c1ioo model such that the signals which
 WFS_err_20111127.pngcioo_20111127.png 
  6290   Thu Feb 16 21:13:07 2012 SureshUpdateElectronicsREFL165 repair: PD replaced, DC response checked with a torch light[Koji, Suresh]
Kiwamu mentioned that REFL165 is
not responding and its DC out seems saturated
 PC_30641_old.jpgPD_30641_new.jpgIMG_0548.JPG 
  6333   Tue Feb 28 16:31:08 2012 SureshUpdateElectronicsREFL165 repair: CharacterizationThe transfer function and current noise
were measured.  The location of the
peak shifts with the amount of incident light
 REFL165_Characterization.pdfREFL165_response_shift.pdf 
  6337   Wed Feb 29 00:22:35 2012 SureshUpdateElectronicsREFL165 repair: Installed on the AS table1) The REFL165 has been replaced onto the
AS table.
2) When the PD interface cable is
  
  6339   Wed Feb 29 01:14:40 2012 SureshUpdateElectronicsREFL165 repair: Characterization

    

       
            
  
  6402   Mon Mar 12 22:14:56 2012 SureshUpdateRF SystemCalibration of Demod Board Efficiency. I have completed the calibration of the
demod board efficiencies.  Here is the
schematic of the set-up.
 Calibration_Schematic.pngDemod_calib.pngDemod_calib.txtDemod_calib.xlsx 
  6418   Wed Mar 14 16:39:02 2012 SureshUpdateGeneralREFL165 signal was not reaching demod board : Fixed

    

       
            
 Test_CDS_Calibration.png 
  6423   Fri Mar 16 06:17:56 2012 SureshUpdateElectronicsREFL165 calibration : measurements 
These are the measurements for estimating
the amplitude of the signal recorded in the
 IMG_0552.JPG 
  6428   Mon Mar 19 21:25:31 2012 SureshUpdateElectronicsREFL165 calibration : measurements


   
        
            
  
  6431   Tue Mar 20 17:50:44 2012 SureshUpdateComputersBeam Scan machine fixedThere was something wrong with the Beam
Scan PC.  The  mouse and screen
were not responding and the PC was asking
  
  6441   Fri Mar 23 05:10:46 2012 SureshUpdateIOOBeam Profile measurements: Errors too large to yield good fits.[Kiwamu, Suresh]
   Today we attempted to
measure the beam profile of the REFL beam
 rawdataplot.pngPRM-to-REFL-profile.pdf 
  6447   Mon Mar 26 23:47:54 2012 SureshUpdateIOOBeam Profile measurement: IPPOS beam[Keiko, Suresh]
   Keiko and I measured
the IPPOS beam profile.  The fit parameters 
 BeamProfile_IPPOS.pngBeamProfile_IPPOS.pdfBeamProfileData_IPPOS.xlsx 
  6448   Tue Mar 27 02:05:40 2012 SureshUpdateIOOBeam Profile measurement: IPPOS beam

    

       
            
 BeamProfile_IPPOS.pngBeamProfile_IPPOS.png 
  6459   Tue Mar 27 23:37:35 2012 SureshUpdateIOOBeam Profile measurement: IPPOS beam

    

       
            
 Beam-Profile_IPPOS_wError.png 
  6477   Mon Apr 2 23:06:38 2012 SureshUpdateIOOBeam Profile measurement: IPPOS beam: Mystery deepens
 40mOpticsLocations.pdfBeam-Profile_IPPOS_wError.pdfBeam-Profile_PRM_1_wError.pdf 
  6526   Thu Apr 12 01:17:56 2012 SureshUpdateIOOBeam Profile measurement: IPPOS beam: Possible Clipping[Suresh, Jenne]
  The
input beam is most probably being clipped
 BeamProfileData_IPPOS_2.xlsx 
  6528   Thu Apr 12 14:48:44 2012 SureshUpdateSUSlocal damping and WFS    WFS servo is moving
the MC mirror angles to minimise TEM01 and
TEM10 modes within the MC cavity.   
  
  6531   Thu Apr 12 23:12:16 2012 SureshUpdateIOOBeam Profile measurement: IPPOS beam: Possible Clipping

    

       
            
 6x 
  6534   Fri Apr 13 16:09:43 2012 SureshUpdateComputer Scripts / ProgramsACAD 2002 installed on C21530I have installed
ACAD 2002 on one of the Windows machines
  
  6535   Sat Apr 14 00:19:35 2012 SureshOmnistructureLSCOptical Fibers for insitu RFPD characterisation    I have worked out the fibers
we need to get for the following distribution
scheme:
  
  6549   Thu Apr 19 09:45:43 2012 SureshUpdateGeneralMC2 Oplev signals redirected for use in WFS servo

    

       
            
  
  6575   Thu Apr 26 18:17:56 2012 SureshUpdateIOOMC WFS: Tweaked the WFS offsets[Jamie, Suresh]
Yesterday Den and Koji reported that
the WFS loops were causing the MC to become
  
  6582   Mon Apr 30 13:00:50 2012 SureshUpdateCDSFrame Builder is downFrame builder is down.  PRM has tripped
its watch dogs.  I have reset the watch
dog on PRM and turned on the OPLEV. It has
  
  6584   Mon Apr 30 16:56:05 2012 SureshUpdateCDSFrame Builder is down

    

       
            
  
  6586   Mon Apr 30 20:43:33 2012 SureshUpdateCDSFrame Builder is down

    

       
            
  
  6668   Wed May 23 20:41:37 2012 SureshBureaucracyGeneral40m Meeting Action Items: Tip-tilts : cabling and electronics

    

       
            
  
  6669   Wed May 23 21:32:15 2012 SureshUpdateIOOWFS didn't turn off automatically

    

       
            
  
  6676   Thu May 24 15:10:43 2012 SureshSummaryGeneralIOO (MC) health check webpage layout   Here is the suggested layout
of the MC health check web page layout. I
will update the Omnigraffle file as people
 MC_Health_Check.pdf 
  6679   Thu May 24 19:39:18 2012 SureshUpdateIOOMC and WFS alignment adjusted[Yuta, Suresh]
We found that the MC was not locking
and that the alignment between PSL and MC
  
  6688   Fri May 25 23:11:50 2012 SureshUpdateIOOMC spot positions measured[Koji, Yuta, Suresh]
We measured the MC spot positions
after re-aligning the MC.  The spot
  
  6733   Thu May 31 17:47:25 2012 SureshOmnistructureGeneral40m Wireless NetworkMike Pedraza came by today to install a
new wireless network router configured for
the 40m lab network.  It has a 'secret'
 40m_Wifi.png 
  6756   Tue Jun 5 20:42:59 2012 SureshSummaryIOOTip-Tilt CablingI have made a preliminary sketch of the
cabling involved in connecting the Tip-tilt
coil drivers.   This is a preliminary
 40m_Tip-tilt_cabling.png 
  6762   Wed Jun 6 01:23:32 2012 SureshSummaryIOOTip-Tilt Cabling
  
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