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ID Date Author Type Category Subjectup Text Attachments
  9628   Wed Feb 12 14:59:36 2014 SteveUpdateSUSclipping removed from PRM oplev The input pointing of PRM oplev beam
was streered just a touch to remove clipping
from it's return. 
 PRMoplPointing.jpgPRMoplevReturn.jpg 
  9629   Wed Feb 12 19:37:05 2014 JenneUpdateSUSclipping removed from PRM oplevI'm not happy with the beam position on
that first lens, but since it's so crazy
in the BS chamber, and the PRM oplev has
  
  5709   Thu Oct 20 04:47:37 2011 kiwamuUpdateLSCclipping search round 1[Koji / Kiwamu]
 
We tried finding a possible clipping in the
  
  3368   Thu Aug 5 16:18:37 2010 AlastairUpdateGeneralclocks still not locked fully - hut removedThe rubidium clocks are still not quite
locked together, though it is clear that
the beat frequency has dropped a lot since
  
  3377   Fri Aug 6 16:20:08 2010 ranaUpdateGeneralclocks still not locked fully - phase shifted I tried to get the clocks to be closer
to 90 deg for the relative phase by adding
some cable length to one of the lines, but
 Untitled.pdf 
  5613   Tue Oct 4 15:43:10 2011 KojiUpdateIOOclosed the shutter before the MCThe shutter before the MC was closed at
3:30 as I started working on the RFAM.
MC REFL (INLOCK): 0.6~0.7
  
  5617   Tue Oct 4 19:06:46 2011 KojiUpdateIOOclosed the shutter before the MCFinished the work at 6:30
MC REFL (INLOCK): 0.50-0.52
MC REFL (UNLOCK): 6.9
  
  12705   Thu Jan 12 10:14:49 2017 SteveHowTosafetyclosing a doorThe door was not locked this morning.

Please do not use this door if
you can not close it!
 odc.jpghowtocloseadoor.jpg 
  12706   Thu Jan 12 13:43:02 2017 ranaHowTosafetyclosing a doorThis is one of those unsolved door lock
acquisition problems. Its been happening
for years.
  
  12707   Thu Jan 12 13:45:58 2017 SteveHowTosafetyclosing a doorIt was requested this morning.




  
  8785   Fri Jun 28 14:57:15 2013 SteveUpdateGeneralclosing lab doorsI found the south end emergency doors not
latched completely. There was a ~ 3/8"
vertical gap from top to bottom.
  
  6072   Mon Dec 5 19:21:55 2011 kiwamuUpdateLSCcoarse beat note signal : ADC limited above 30 HzThe
signal observed by the coarse frequency discriminator
was actually dominated by the ADC noise above
 Yarm_ALS_coarse.png 
  3850   Wed Nov 3 02:37:39 2010 yutaSummaryGreen Lockingcoarse locked green beat frequency(Kiwamu, Yuta)

 Screenshot_LowFreqLock.png 
  3851   Wed Nov 3 03:00:47 2010 KojiSummaryGreen Lockingcoarse locked green beat frequencyWow! Great guys!!   
  6779   Thu Jun 7 05:39:41 2012 yutaUpdateGreen Lockingcoarsely stabilized Y arm length with ALSI coarsely stabilized Y arm length to off
resonance point for IR using ALS.
Currently, ASL servo loop is unstable
 MyFirstALS20120607.png 
  9087   Wed Aug 28 23:09:55 2013 jamieConfigurationCDScode to generate host IPC graph   hosts.png40m-ipcs-graph.py 
  13140   Tue Jul 25 00:03:01 2017 ranaOmnistructureTreasurecoffee pot lidI
have recommissioned the Zojirushi coffee
pot lid. You may, once again, align the dots
  
  5816   Fri Nov 4 21:52:58 2011 DenUpdateAdaptive Filteringcoherence[Mirko, Den]
We still think about the coherence
between seismic noise and mode cleaner length.
 mirror_platform.jpgcoherence.jpgScreenshot-4.png 
  5825   Sun Nov 6 21:09:03 2011 ranaUpdateAdaptive Filteringcoherence


   
        
            
  
  6065   Sat Dec 3 18:29:20 2011 DenUpdateAdaptive FilteringcoherenceI've looked through the coherence between
the MC length and seismometers after the
if-statement problem was fixed. Coherence
 coh_mcl_seis.pdfsensor_locker.pdf 
  2206   Mon Nov 9 01:52:56 2009 ranaUpdatePEMcoherence v. time for 2 accelerometersI used the coh_carpet.m function from
the mDV to calculate this plot:
 coh.png 
  13417   Wed Nov 8 12:19:55 2017 gautamUpdateSUScoil driver series resistanceWe've been talking about increasing
the series resistance for the coil driver
path for the test masses. One consequence
 vthresh.pdf 
  10563   Fri Oct 3 10:10:37 2014 SteveUpdateVACcold cathode gauge reading switched 
We have two cold cathode gauges at
the pump spool and one  signal cable
 CC1switched.png 
  7044   Fri Jul 27 14:28:36 2012 steveUpdateVACcold cathode gaugesOur cold
cathode 423 gauges are 10 years old.
They get insulated by age and show no ionization
 cc_gauges.png 
  11625   Mon Sep 21 11:12:14 2015 SteveUpdateVACcold cathode is flakyCC4 cold cathode gauge jump triggered interlock
to close VM1 valve to protect the RGA.

The IFO pressure is 1e-5 Torr
 cc4jumps.png 
  11633   Tue Sep 22 08:58:38 2015 SteveUpdateVACcold cathode is flakyThe cold cathode gauge is back to normal.
cc4 is the last gauge is "functioning"

MKS is not responding. The spare
 4and80days.png 
  11644   Fri Sep 25 17:00:38 2015 SteveUpdateVACcold cathode is flakyThe IFO pressure is estimated ~1E-6 Torr
with modified Vac normal valve configuration.

CC4 is in a jumping mode between
 flakyCC4.png 
  4424   Tue Mar 22 16:39:51 2011 kiwamuUpdateGreen Lockingcomaprator installed : 80 pm residual displacement A
comparator has been installed before the
MFDs (mixer-based frequency discriminator)
 noise_curve20110322.png 
  13954   Wed Jun 13 11:59:03 2018 keerthanaUpdateelogcommand line enabled code for frequency scanningI have modified the code for frequency
scanning and have made it completely command
line enabled. The code is written in python.
  
  9468   Fri Dec 13 18:03:00 2013 DenUpdateIOOcommon mode servo

    

       
            
 CM_OL.pdfCM_CL.pdf 
  9470   Fri Dec 13 23:07:04 2013 KojiUpdateIOOcommon mode servoLooks good.
Once the control cable (bakplane
cable) is identified, we can install the
  
  9472   Sat Dec 14 11:56:54 2013 ranaUpdateLSCcommon mode servo

    

       
            
  
  9474   Sat Dec 14 14:21:46 2013 DenUpdateLSCcommon mode servo

    

       
            
  
  4161   Sun Jan 16 02:20:59 2011 SureshUpdateLockingcomparing the PSL with the X-end-NPRO through the green beatObjective:
      We
wish to study the coherence of the two NPROs
 P1160510.JPGP1160511.JPGP1160515.JPGP1160516.JPG 
  4166   Wed Jan 19 03:37:30 2011 SureshUpdateLockingcomparing the PSL with the X-end-NPRO through the green beat 
 
 [Kiwamu, Suresh]
 Phase_noise_in_digital_frequency_dividers.pdf 
  181   Fri Dec 7 18:28:30 2007 tobinUpdateComputer Scripts / Programscompiled matlab hoses itselfAndrey pointed out to me that some matlab
functions in the Signal Processing Toolbox
were dying with errors.  Looking into the
  
  182   Fri Dec 7 18:31:30 2007 tobinUpdateComputer Scripts / Programscompiled matlab hoses itselfAddendnum.  The reason the linemon_mcr command
was in the path was because of the user issuing
the command "addpath(genpath(pwd))" where
  
  9432   Mon Dec 2 14:24:10 2013 SteveUpdateCDScomputer problemsRack 1x6 is very noisy.
 SunFire X4600 computer: FB
(directly below Megatron) has it's yellow
 c1iscex.png1X6.JPG 
  9436   Tue Dec 3 17:08:06 2013 KojiUpdateCDScomputer problemsIt seems that the front fan unit was running
at the full speed. The fan itself seems still
OK.
  
  1771   Tue Jul 21 18:46:47 2009 steveConfigurationComputerscomputers are downAll suspentions are kicked up. Sus dampings
and  oplev servos turned off.
c1iscey and c1lsc are down. c1asc
  
  1772   Wed Jul 22 01:57:19 2009 AlbertoConfigurationComputerscomputers are down


   
        
            
  
  1773   Wed Jul 22 09:04:10 2009 AlbertoConfigurationComputerscomputers are down


   
        
            
  
  1776   Wed Jul 22 11:14:11 2009 AlbertoConfigurationComputerscomputers are down


   
        
            
  
  3493   Tue Aug 31 10:44:17 2010 steveUpdatePEMconcrete sealedThe PSL -leg concrete was sealed with a
single coat of SCOFIELD Cureseal-S to minimize
shedding of particles.
 P1060787.JPG 
  12825   Mon Feb 13 17:19:41 2017 yinziConfiguration configuring ethernet for raspberry piGautam and I were able to get the Raspberry
Pi up and running today, including being
able to ssh into it from the control room.
 Screen_Shot_2017-02-13_at_5.11.52_PM.png 
  3862   Thu Nov 4 17:24:49 2010 steveUpdateGeneralconflat flanges for MIT8 pieces of 10" CF blanks were shipped
to MIT
 P1070020.JPG 
  9802   Fri Apr 11 14:57:53 2014 steveUpdateLSCcongratulation 
 
 whenSheisHappy3h.pngmc4hArms3hrs.png 
  9803   Fri Apr 11 16:04:31 2014 KojiUpdateLSCcongratulationIt's
just one of the stepping stones, but not
yet a mile stone.
  
  990   Thu Sep 25 03:12:13 2008 ranaSummaryComputersconlog and linux1It would be nice to have conlog from outside.
Right now its on linux1 and so its unavailable.
To
  
  5379   Sat Sep 10 18:52:45 2011 ranaUpdateComputersconlog getting filled upOne of the reasons that conlog seems so
slow lately is that its been writing 100's
of MB of .log files every day since early
  
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