40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log, Page 156 of 344  Not logged in ELOG logo
ID Date Author Typeup Category Subject Text Attachments
  5879   Sat Nov 12 02:00:36 2011 MirkoUpdateAdaptive FilteringMC-F and other signalsRegarding http://nodus.ligo.caltech.edu:8080/40m/5867
and http://nodus.ligo.caltech.edu:8080/40m/5869
  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

  5882   Sat Nov 12 02:46:13 2011 DenUpdateAdaptive Filteringstacks and groundWe measured the coherence between the seismometer
near the MC2 stack and accelerometers on
the vacuum tank where MC2 is. Because accelerometers
  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
  5884   Sat Nov 12 08:09:47 2011 ranaUpdateIOOMC WFS Servo: Open loop gain Somehow, I generically don't like the idea
of lead filters for the WFS loops. We don't
really need so much bandwidth. I think you
  5886   Mon Nov 14 12:16:41 2011 JenneUpdateComputersOAF model died for unknown reasonI am meditating on the OAF, and had it
running and calculating things.  I had
the outputs disabled so I could take reference
  5887   Mon Nov 14 15:46:14 2011 steveUpdateVACTP2's forepump changedThe foreline pressure of TP2 was 1.4 Torr
this morning. This drypump worked well for
ten months.
  5888   Mon Nov 14 17:01:14 2011 kiwamuUpdateGreen LockingALS feedback on MC2Leaving a note on the ALS feedback before
I forget:
  5890   Mon Nov 14 22:56:31 2011 kiwamuUpdateGreen LockingY end PDH lock : UGF at 17 kHz[Tomotada / Kiwamu]
The open loop transfer function of the Y
  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

  5893   Tue Nov 15 09:51:04 2011 ZachUpdateGreen LockingY end PDH lock : UGF at 17 kHz


  5894   Tue Nov 15 12:25:38 2011 kiwamuUpdateGreen LockingY arm ALS : beat-note free run fluctuationLocking activity last night :
The free run beat-note in 532 nm has been
  5895   Tue Nov 15 15:16:04 2011 kiwamuUpdateCDSdataviewer doesn't runDataviewer is not able to access to fb
I restarted daqd on fb but it didn't
  5896   Tue Nov 15 15:56:23 2011 jamieUpdateCDSdataviewer doesn't run


  5897   Tue Nov 15 16:16:34 2011 steveUpdatePSLenclosure interlocks are working on all sliding doorsBen and Sam came over to fix one of 
the east side  sliding  door sensor
that had to be moved from the inside 
  5898   Tue Nov 15 16:25:38 2011 steveUpdatePSLIOO angle qpd centeredThis moring I centered the IOO Angle QPD.
The IOO Pos QPD was not centered. The existing
layout does not allow the beam centering
  5899   Tue Nov 15 19:59:41 2011 SureshUpdateIOOWFS output matrix measured (open loop)

  5900   Tue Nov 15 22:31:39 2011 MirkoUpdateAdaptive FilteringTowards wiener filtering and improved OAFing
[Jenne, Mirko]
1. We should help the OAF by compensating
  5901   Tue Nov 15 23:44:44 2011 MirkoUpdateCDSC1:LSC & C1:SUS restartedEarlier this evening C1:LSC died then I
hit the DAQ reload after adding an OAF channel
to be recorded. No change to any model. Had
  5902   Wed Nov 16 01:45:37 2011 ZachUpdateelogrestartedElog was hanging. Restarted it with script.   
  5903   Wed Nov 16 02:36:35 2011 KojiUpdateelogrestartedBasically, elog hangs up by the visit of
Googlebot repeatedly tries to obtain
  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. 
  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
  5907   Wed Nov 16 10:11:20 2011 steveUpdatePSLIOO angle & pos qpd centered

  5908   Wed Nov 16 10:13:13 2011 jamieUpdateelogrestarted


  5909   Wed Nov 16 10:25:57 2011 steveUpdateSUSPRM damping restoredThe  PRM lost damping about a day
ago. It was restored.
  5910   Wed Nov 16 10:53:35 2011 SureshUpdateIOOMC2 Shifted in Pitch, corrected by adjusting the pitch bias

  5911   Wed Nov 16 12:21:33 2011 KojiUpdateeloggooglebot (Re: restarted)- elogd itself is a sort of web server
which has no freedom to put our own file,
we can not put robots.txt
  5912   Wed Nov 16 14:34:18 2011 steveUpdatePSLIOO beam moves in pitchC1:IOO-QPD_ANG_VERT beam movement 
in 1 degree C temp change in 3 hrs
  5913   Wed Nov 16 17:03:19 2011 KojiUpdateIOOMC2 Shifted in Pitch, corrected by adjusting the pitch biasMC was not locked for more than 5 hours
because of the misalignment.
Noticed that MC2 WFS feedback filters
  5914   Wed Nov 16 17:29:46 2011 kiwamuUpdateGreen LockingSome updates on the Y end green PDH

  5915   Wed Nov 16 17:40:48 2011 MirkoUpdateIOOMC unlocked and misaligned.MC fell out of lock and was then quite
badly misaligned. Mostly in pitch. I realigned
it and it locked ok.
  5916   Wed Nov 16 18:14:09 2011 KojiUpdateIOOMC unlocked and misaligned.Actually, do we need to reset the filter
history at every lock loss of the MC?
Those DC offsets were necessary to
  5917   Wed Nov 16 20:30:27 2011 not KojiUpdateIOOMC unlocked and misaligned.


  5918   Wed Nov 16 21:01:08 2011 JenneUpdateTreasureeom boxI made a super sweet new foam box for our
EOM.  It's awesome, and should be reasonably
easy to duplicate.  Check out the 
  5919   Wed Nov 16 23:50:40 2011 DenUpdateAdaptive Filteringseismic noise injection[Micro, Den]
Analyzing coherence of seismic noise
and mode cleaner length we've figured out
  5920   Thu Nov 17 03:46:52 2011 kiwamuUpdateGreen LockingPSL doubling had been diabledI
found that the temperature controller of
the PSL doubling oven had been disabled.
  5921   Thu Nov 17 11:04:02 2011 JenneUpdateRF SystemStochmon?Is there an update on Stochmon?  Are
the signals acquired somewhere already? 
What's the current deal-io?  The new
  5922   Thu Nov 17 11:27:58 2011 JenneUpdatePSLHEPA turned downI was measuring things to see how big my
adapter plate needs to be, and I decided
that we'd had enough days of the HEPA being
  5923   Thu Nov 17 11:35:27 2011 KojiUpdateRF SystemStochmon?The  Stochmon channels for 11&55MHz
have been reasonably working since last night.
The output is not yet calibrated
  5924   Thu Nov 17 11:51:14 2011 JenneUpdateEnvironmentIncandescent vs. fluorescent lights?I'm just on an elog roll this morning...
Again while poking around inside
the IFO room, I noticed that they have replaced
  5925   Thu Nov 17 13:58:12 2011 SureshUpdateIOOMC unlocked and misaligned.

  5926   Thu Nov 17 14:38:16 2011 ZachUpdateRF SystemStochmon?It turns out that we don't have all the
parts I would need to do a full prototype
  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.
  5928   Thu Nov 17 17:03:28 2011 MIrkoUpdateIOOMC noise projectionAnother go at the noise projection from
MC1-3 pit/yaw to MC length. This  time injecting
into the MC autoalignment FB (e.g. C1:IOO-WFS1_PIT_EXC
  5929   Thu Nov 17 17:21:22 2011 kiwamuUpdateGreen LockingY end green PDH servo : it's okay


  5930   Thu Nov 17 18:20:26 2011 kiwamuUpdateGreen LockingY arm ALS : 1st trial of noise budgetThe
noise budget on the Y arm ALS has begun.
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