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ID Date Author Type Categorydown Subject Text Attachments
  5822   Sat Nov 5 21:19:08 2011 ZachUpdateSUSDr. SUS paths updated--question of human oversight remainsOk, here's the deal:

    For the time being, I
have written a "
  
  5823   Sun Nov 6 09:39:25 2011 Dr. SUSUpdateSUSOptics kickedAll suspended optics have been kicked at Sun
Nov  6 09:39:25 PST 2011. Watchdogs will
be reengaged in 5 hours. Please refrain from
  
  5824   Sun Nov 6 16:58:25 2011 ZachUpdateSUSDr. SUS failed--NDS2 problems again Dr. SUS failed while trying to   
  5844   Wed Nov 9 07:57:39 2011 steveUpdateSUSETMX oplev is down and sus damping restoredThe ETMX oplev returning beam is well centered
on the qpd. We lost this signal 2 days ago.
I will check on the qpd. 
 etmxtripped.pngetmxOpl.png 
  5845   Wed Nov 9 10:35:30 2011 jamieUpdateSUSETMX oplev is down and sus damping restored

    

       
            
  
  5862   Thu Nov 10 12:28:31 2011 JenneUpdateSUSMC2 is being a little wild...WFS to blameMirko and  Den are measuring MC_F,
which they will report about later, but I
noticed that MC2 is totally crazy right now. 
 WFSscreenshot.png 
  5865   Thu Nov 10 19:41:24 2011 JenneUpdateSUSMusings on SUS dewhitening, and MC ELP28'sThe
following will be a stream-of-consciousness,
approximately chronological story of my last
  
  5873   Fri Nov 11 13:26:24 2011 jamieUpdateSUSMusings on SUS dewhitening, and MC ELP28's

    

       
            
  
  5877   Fri Nov 11 21:09:30 2011 SureshUpdateSUSMC2 is being a little wild...WFS to blame


   
        
            
 LOCKMC_screen.png 
  5909   Wed Nov 16 10:25:57 2011 steveUpdateSUSPRM damping restoredThe  PRM lost damping about a day
ago. It was restored.
  
  5927   Thu Nov 17 15:19:06 2011 steveUpdateSUSTi spring plunger to hold OSEM is not affortableOur existing 300 series SS plungers from
McMastercar #8476A43 are silver plated as
Atm2 shows.
 20111116111042405.pdfP1080216.JPG 
  5974   Tue Nov 22 00:19:10 2011 kiwamuUpdateSUSc1auxey hadware rebootedI found that the slow machine c1auxey,
which controls and monitoring the ETMY suspension
  
  5982   Tue Nov 22 23:06:13 2011 kiwamuUpdateSUSMC watchdogs[Rana / Mirko / Kiwamu]
 
  
  6007   Fri Nov 25 18:45:31 2011 Den, RanaSummarySUSExcess Noise in Digital FilteringWe are now trying to understand why the
coherence between SUS-X_SUSPOS_IN1 and SUS-X_SUSPOS_OUT
is lost below 1 Hz for X = MC1, MC2, MC3,
 FiltNoise.png 
  6008   Fri Nov 25 19:45:36 2011 Mirco, DenSummarySUSExcess Noise in Digital Filtering


   
        
            
 sus_coh-crop.pdflsc_coh-crop.pdf 
  6010   Fri Nov 25 20:41:48 2011 ranaUpdateSUSMC watchdogsIt seems as if someone was looking into
this on Wednesday, but as there's no elog,
I think probably not.
  
  6014   Sat Nov 26 02:15:42 2011 MirkoUpdateSUSNot adaptive, still cool[Rana, Mirko]
I tried out the virtual pendulum
idea today. The idea is to compensate the
 PendulumQ0.1HzWithElip2comma5HzLpWfsOnCorrectedShape.pdfVirtualPendulumFilterShape.pdfSetupVirtualPendulumV2.png 
  6021   Mon Nov 28 10:54:40 2011 ranaUpdateSUSF2A filter for MCOur
approach to making the F2A or F2P filters
  
  6057   Thu Dec 1 03:27:39 2011 MirkoUpdateSUSNot adaptive, still cool


   
        
            
  
  6060   Thu Dec 1 17:33:18 2011 kiwamuUpdateSUSwatchdogs fixedThe watchdogs'
issue has been solved and they are now working
  
  6128   Sat Dec 17 01:56:16 2011 KojiSummarySUSHysteresis test[Koji Kiwamu]
We wonder if the flakiness of MC2
comes from the suspension or not.
  
  6129   Sat Dec 17 03:59:32 2011 kiwamuUpdateSUSAborted Hysteresis test

    

       
            
  
  6130   Sat Dec 17 11:53:46 2011 ZachUpdateSUSAborted Hysteresis testDo you guys have timestamps for when you
started/ended the test? I have been trying
to take some long-term RAM data but keep
  
  6131   Sat Dec 17 12:41:46 2011 KojiUpdateSUSAborted Hysteresis testThe test was from: 2011-12-17 09:48 to
11:49 (UTC).
This corresponds to the period from
  
  6132   Sun Dec 18 16:16:55 2011 kiwamuUpdateSUSAnother trial of Hysteresis testKoji has modified the script for the hysteresis
measurement.
A
  
  6134   Sun Dec 18 19:56:00 2011 kiwamuUpdateSUSAnother trial of Hysteresis testThe measurement finished at ~ 21:50
PT.

  
  6135   Sun Dec 18 23:00:22 2011 kiwamuUpdateSUSoplve recenterdI have recentered the oplev beams, including
BS, ITMs and ETMs.
  
  6136   Mon Dec 19 01:54:35 2011 kiwamuUpdateSUSanother trial of hystersis testAnother hysteresis test has begun at 1:50
PT, Dec/19.
It will finish after 3 or 4 hours.
  
  6142   Wed Dec 21 14:23:08 2011 ranaConfigurationSUSHysteresis in suspensions?While discussing the suspension hysteresis
measurements, Koji, Kiwamu, and I realized
that the suspension wire standoff is aluminum,
  
  6180   Mon Jan 9 08:47:35 2012 steveUpdateSUSETMX damping restoredETMX sus damping restored   
  6181   Mon Jan 9 13:19:09 2012 kiwamuUpdateSUSETMX damping restoredNo
we can't do that because the c1scx model
is not working properly.
  
  6188   Thu Jan 12 07:44:21 2012 steveUpdateSUSsapphire wire standoff quote
On Tue, Dec 20, 2011 at 11:37 PM,
Rana Adhikari wrote:
 standoff.PDF 
  6194   Thu Jan 12 23:19:56 2012 KojiUpdateSUSc1iscex is fine nowc1iscex
is working as before and the optic is damped.

What I checked
  
  6232   Fri Jan 27 09:05:41 2012 steveUpdateSUSOSEM locking plunger

    

       
            
  
  6233   Fri Jan 27 13:13:03 2012 JenneUpdateSUSITMs trippedSitting down to start cavity measurements,
I found both ITMs tripped.  It must
have happened a while ago (I didn't bother
  
  6238   Mon Jan 30 23:10:02 2012 kiwamuUpdateSUSdrift mon script needs to be fixed[Rana / Kiwamu]
We tried to set some parameters for
the suspension drift monitor but the old
  
  6252   Fri Feb 3 19:57:26 2012 ranaConfigurationSUSPSL Shutter closed for SUS hysteresis testFri Feb 03 19:57:20 2012
Fri Feb 03 20:25:19 2012 :  
Aligned all SUS to center their OL beams
  
  6253   Fri Feb 3 20:19:38 2012 ranaUpdateSUSOplev QPD Sum Trends are suspiciousThe attached trend shows a problem with
the QPD sums.
Why are ETMX
 a.png 
  6255   Fri Feb 3 23:19:22 2012 ZachUpdateSUSOSEM testing beginsI took one of the spare OSEM satellite  IDE64_homestyle.png 
  6256   Mon Feb 6 11:07:21 2012 steveUpdateSUSOplev QPD Sum Trends are suspicious


   
        
            
 oplevsums.png 
  6257   Mon Feb 6 17:06:11 2012 steveUpdateSUSoplev transferfunction of PIT: ETMY & ETMXKiwamu showed me how to do transferfunction
of oplev pitch
 ETMX_PIT.pngETMY_PIT.png 
  6258   Tue Feb 7 03:05:08 2012 ZachUpdateSUSOSEM sat amp measurementsI did some more investigation on the  sat_amp_measurement_setup.pngpd_amp_vs_liso.pngLED_driver_vs_liso.png 
  6259   Tue Feb 7 16:30:46 2012 steveUpdateSUS ALL oplev PIT transfer functionsSUS- BS, ITMX, ITMY, PRM, SRM, ETMX &
ETMY_OLPIT transfer funtion with sine wave
excitation 0.1 amplitude:
 7x 
  6260   Wed Feb 8 16:37:02 2012 steveUpdateSUSITMX OSEM LL is sickI'm driving C1:SUS-ITMX_OLYAW and PIT_EXC
with amplitude 0,1-0.3 while taking transfer
funtions of oplev.
 ITMXsensorLL.pngITMXsensorLLyaw.1.pngETMX.2amplPIT2.png 
  6261   Thu Feb 9 12:38:15 2012 ZachUpdateSUSOSEM LED driver noiseFrank pointed out to me that I had dumbly
forgotten to include the voltage reference's
 LED_driver_vs_liso.png 
  6263   Thu Feb 9 16:46:02 2012 steveUpdateSUS ALL oplev YAW transfer functions


   
        
            
 7x 
  6264   Thu Feb 9 17:11:05 2012 steveUpdateSUSmore OSEM problemsThese observations of the OSEMs  were
taken while taking transfer functions of
oplev YAW at excitation amplitude 0.1
 ETMXosemEXC0.1ampl.pngIMTX-YAW0.1.pngBSosemEXC.1ampl.pngPRMosemEXC.1ampl.png 
  6267   Fri Feb 10 02:43:37 2012 ZachUpdateSUSOSEM LED driver noise *reduced*I worked on the OSEM box a little more
today, with the hopes of reducing the measured
output current noise. 
 circuit.pngLT1031_vs_liso.pnginterstage_vs_liso.pngLED_driver_vs_liso.png 
  6270   Fri Feb 10 15:46:59 2012 steveUpdateSUSruby wire standoffFinally I found a company who can do Koji's
improved  -hard to make-  specification
on ruby or sapphire wire standoff.
  
  6278   Tue Feb 14 08:22:27 2012 steveUpdateSUSsus damping restoredITMX, PRM and BS watchdogs are tripped.
They were restored.
Stable MC was disabled so I can use
  
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