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  40m Log, Page 280 of 337  Not logged in ELOG logo
ID Date Author Type Category Subject Text Attachments
  2895   Fri May 7 14:51:04 2010 josephbUpdateCDSWorking on meta .mdl file scriptsI'm currently working on a set of scripts
which will be able to parse a "template"
mdl file, replacing certain key words, with
  
  2894   Fri May 7 11:21:49 2010 kojiUpdate40m UpgradingNew improved design for the 11MHz photodiodeHow much is the width?

  
  2893   Thu May 6 19:57:26 2010 AlbertoUpdate40m UpgradingNew improved design for the 11MHz photodiode


   
        
            
 pox11.pdf 
  2892   Thu May 6 19:51:22 2010 JenneUpdatePEMNew 'Seismic Spectrum of the 40m'For reasons unknown, the seismic spectra
posted above Rosalba has been wrong since
~January when it was first posted. 
 SeisRef_6May2010_AccelCalFudged.png 
  2891   Thu May 6 19:23:54 2010 FrankSummaryComputerssvn problemsi tried to commit something this afternoon
and got the following error message:
Command: Commit  
  
  2890   Thu May 6 18:43:58 2010 ranaUpdatePEMNoise floor of the Ranger SeismometerI
added a noise model of the SR560 to the LISO
opamp.lib. This assumes you're
 ranger.pdf 
  2889   Thu May 6 18:25:20 2010 JenneUpdatePEMAcc power supply turned onThe accelerometer power supply / preamp
board has been OFF because of exciting new
accelerometer measurements.  It's now
  
  2888   Thu May 6 17:54:44 2010 Zach Korth -- Committee Oversight (Fun Division)OmnistructureTMIMinutes from the Lab Organization Commitee meetingWhere are we going to put the tiki bar?
The ice cream machine? I am disappointed
in the details that appear to have been glossed
  
  2887   Thu May 6 17:47:01 2010 Alberto, kiwamu, Jc The 3rd (aka The Drigg)OmnistructureTMIMinutes from the Lab Organization Commitee meetingToday we met and we finally come up with
a lot of cool, clever, brilliant, outstanding
ideas to organize the lab.
  
  2886   Thu May 6 16:18:37 2010 AlbertoUpdate40m UpgradingNew improved design for the 11MHz photodiodeAfter munching analytical models, simulations,
measurements of photodiodes I think I got
a better grasp of what we want from them,
 pox11.pdf 
  2885   Thu May 6 11:34:35 2010 robUpdateCDSlsc.mdl and ifo.mdl to build (with caveats)


   
        
            
  
  2884   Thu May 6 01:06:16 2010 KojiUpdateIOOMC spot centering cont'd (Triumph)Zach and Koji,
We
finally aligned the incident beam enough
  
  2883   Wed May 5 16:58:21 2010 KojiUpdatePSL2W hooked up to the interlock serviceBen, Steve, and Koji
Ben came to the 40m and hooked up
a cable to the main interlock service.
  
  2882   Wed May 5 16:32:39 2010 AlbertoUpdate40m UpgradingNew REFL55 PD, 11MHz rejectionHere's the (calibrated) transimpedance
of the new REFL55 PD.
T(55.3) / T_(11.06) = 93 dB
 2010-05-05_REFL55_CalibratedOpticalResponse0-60MHz.png 
  2881   Wed May 5 02:37:55 2010 ranaConfigurationPSLRC Temperature Servo Turned OFF temporarily


   
        
            
 Picture_7.png 
  2880   Wed May 5 01:19:05 2010 KojiUpdateIOOMC spot centering cont"dKoji and Zach
We improved the beam axis rotaion
on the MC. We still have 
 steering.png 
  2879   Tue May 4 18:40:27 2010 ranaHowToElectronicsMarconi phase noise measurement setupTo check the UGF, I increased the gain
of the PLL by 10 and looked at how much the
error point got suppressed. The green trace
 Untitled.pngifrnoise.png 
  2878   Tue May 4 14:57:53 2010 josephbUpdateComputersOttavia has movedOttavia was moved this afternoon from the
control room into the lab, adjacent to Mafalda
in 1Y3 on the top shelf.  It has been
  
  2877   Tue May 4 13:14:43 2010 josephbUpdateCDSlsc.mdl and ifo.mdl to build (with caveats)I got around to actually try building the
LSC and IFO models on megatron.  Turns
out "ifo" can't be used as a model
  
  2876   Tue May 4 06:32:58 2010 albertoConfigurationPSLRC Temperature Servo Turned OFF temporarily


   
        
            
  
  2875   Tue May 4 02:28:38 2010 ranaConfigurationPSLRC Temperature Servo Turned OFF temporarily 
 My attempt to passively measure
  
  2874   Mon May 3 19:21:43 2010 AlbertoDAQEnvironmentBoot fest[Alberto, Koji, Rana]
The RFM network failed today. We
had to reboot the frame builder anf restart
  
  2873   Mon May 3 17:49:41 2010 ranaConfigurationPSLRC Temperature Servo Turned OFF temporarily


   
        
            
 rct.png 
  2872   Mon May 3 16:53:27 2010 josephbUpdateCDSUpdated lsc.mdl and the ifo plant model with memory locationsI've updated the LSC and IFO models that
Rana created with new shared memory locations. 
I've used the C1:IFO- for the ifo.mdl file
  
  2871   Mon May 3 15:39:39 2010 josephbUpdateCDSDaily Downs updateTalked with Jay briefly today.  Apparently
there are 3 IO chassis currently on the test
stand at Downs and undergoing testing (or
  
  2870   Mon May 3 01:35:41 2010 KojiUpdateSUSLessons learned from MC spot centeringLessons
learned on the beam spot centering (so far)
  
  2869   Mon May 3 01:16:50 2010 ranaHowToElectronicsMarconi phase noise measurement setup To try the 3-corner hat method
on the Marconis, I started to set up the
 pn.png 
  2868   Mon May 3 00:36:49 2010 KojiUpdateSUSHow to steer the incident beam to the MC?Actually, I tried some tweaks of the input
steering to get the  beam being more centered
on the MC mirrors on Saturday evening.
  
  2867   Sun May 2 17:16:43 2010 KojiUpdateSUSHow to steer the incident beam to the MC?Deviations of the MC spot from the center
of the mirrors were measured.
MC1H = +0.29 mm
 steering.png 
  2866   Sun May 2 16:52:44 2010 KojiSummarySUSCoil Actuator Balancing and Spot PositionYes, of course. But so far I am trusting
that the coils are inheretly balanced.
Probably you are talking about the
  
  2865   Sun May 2 15:38:12 2010 ranaSummarySUSCoil Actuator Balancing and Spot Position 
Oh, but it gets even better: in order
to trust the A2L script in this regard you
  
  2864   Sun May 2 15:28:25 2010 KojiUpdateIOOSpot Positions of MC1/MC3Summary
The spot positions on the MC mirrors
were measured with coil balance gains.
 spot_position.png 
  2863   Sun May 2 13:04:51 2010 KojiSummarySUSCoil Actuator Balancing and Spot PositionI liked to know quantitatively where the
spot is on a mirror.

With an interferometer and A2L
 coil_balance.png 
  2862   Fri Apr 30 23:16:51 2010 KojiUpdateSUSSRM/PRM ready for bakingKiwamu and Koji
- Checked the SRM/PRM balancing after
the gluing.
  
  2861   Thu Apr 29 15:48:47 2010 josephbUpdateCDSNew CDS overview diagram in wikiI've added a diagram in the wiki under
IFO Upgrade 2009-2010->New CDS->Diagram
section Joe_CDS_Plan.pdf (the .svg file I
  
  2860   Thu Apr 29 14:37:16 2010 josephbUpdateCDSNew Channel Name to Memory Location fileAwhile back we had requested a
feature for the RCG code where a single file
would define a memory location's name as
  
  2859   Wed Apr 28 16:15:02 2010 KevinUpdatePSLAccelerometer CalibrationKoji, Steve, and Kevin looked into calibrating
the Wilcoxon accelerometers. Once calibrated,
the accelerometers will be used to monitor
  
  2858   Wed Apr 28 14:42:55 2010 ZachUpdateIOOMC alignmentSure. I figured I would put up a How-To
if it works. 
  
  2857   Wed Apr 28 14:22:36 2010 KevinUpdatePSLre: 2W Vertical Beam ProfileI used the Mathematica CurveFit package
that we use in Ph6/7 to make the fits for
the beam profile data. I wrote two functions
 BeamFit.nb.tar 
  2856   Wed Apr 28 14:15:58 2010 AlbertoUpdateIOOMC alignment 
 That's interesting.
Would it be possible to write about
  
  2855   Wed Apr 28 12:05:44 2010 ZachUpdateIOOMC alignmentI have worked out the first set of adjustments
to make on the MC mirrors (all angle figures
are in units of the increments on the control
  
  2854   Wed Apr 28 09:21:16 2010 ZachUpdateelogelog restartedAnd again.


  
  2853   Wed Apr 28 08:55:19 2010 ZachUpdateelogelog restarted Restarted the elog with the script
as it was down.
  
  2852   Tue Apr 27 22:28:58 2010 ZachUpdateIOOMC alignmentBeginning last week, I have been helping
Koji with some of the IO work that must be
done for the 40m upgrade. The first thing
 MC_misaligned.png 
  2851   Tue Apr 27 15:29:16 2010 KevinUpdatePSLre: 2W Vertical Beam ProfileI thought that the micrometer I was using
to move the razor through the laser beam
was metric; however, it is actually english.
 vbp.jpgvbp_residuals.jpg 
  2850   Tue Apr 27 14:18:53 2010 kiwamuUpdateGreen Lockingwaist positon of Gaussian beam in PPKTP crystalsThe mode profile of Gaussian beams in
our PPKTP crystals was calculated.
I
 mode_in_PPKTP.png 
  2849   Tue Apr 27 11:16:13 2010 josephbConfigurationCDSWiki page with CDS .mdl names, shared memory allocationI've added a new page in the wiki which
describes the current naming scheme for the
.mdl model files used for the real time code
  
  2848   Mon Apr 26 21:12:53 2010 KojiUpdateSUSPRM/SRM standoffs gluedKiwamu and Koji
The PRM/SRM were balanced with the
standoffs. We glued them to the mirror.
  
  2847   Mon Apr 26 17:34:31 2010 KojiUpdatePSLre: 2W Vertical Beam ProfileGive me the plot of the fit, otherwise
I am not convinced.

  
  2846   Mon Apr 26 16:51:37 2010 KevinUpdatePSLre: 2W Vertical Beam ProfileI tried Koji's suggestions for improving
the fit to the vertical beam profile; however,
I could not improve the uncertainties in
  
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