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  40m Log, Page 2 of 327  Not logged in ELOG logo
ID Date Authordown Type Category Subject Text Attachments
  3645   Mon Oct 4 19:48:00 2010 yutaUpdateVACseveral mirrors installed to ITMX/BS chamber(Koji, Kiwamu, Yuta)
Lots of progress
 P1060901.JPGP1060904.JPG 
  3656   Tue Oct 5 21:22:46 2010 yutaUpdateVACgreen beam reached PSL tableY  IMG_3627.jpg 
  3667   Thu Oct 7 14:39:50 2010 yutaUpdatePSLmeasured PMC's laser power-output relation(Rana, Yuta)

Motivation:
 PMCreflect.png 
  3672   Thu Oct 7 16:34:06 2010 yutaUpdatePSLmeasured PMC's laser power-output relationResult2:
 Attached is the visibility vs
incident power(assuming output of the PD
 PMCvis.png 
  3674   Thu Oct 7 17:53:07 2010 yutaUpdateComputersFarfalla with Firefox, fixed(Kiwamu, Yuta)

Symptom:
  
  3675   Thu Oct 7 23:24:44 2010 yutaUpdateCDSchecking MC1 suspension dampingBackground:
 The new CDS is currently being
set up.
  
  3689   Mon Oct 11 16:09:10 2010 yutaSummarySUScurrent OSEM outputsBackground:
 The output range of the OSEM
is 0-2V.
  
  3690   Mon Oct 11 17:31:44 2010 yutaUpdateCDSActivation of DAQ channels for 8 optics(Joe, Yuta)

Background:
  
  3692   Mon Oct 11 22:04:28 2010 yutaUpdateCDSdamping for MCs are basically workingBackground:
 Even if we can't use the Dataviewer
to get the time series of each 4 DOF displacements,
 SUS-MC1.pngSUS-MC2.pngSUS-MC3.png 
  3697   Tue Oct 12 15:51:18 2010 yutaBureaucracySAFETYthe 40m squad received safety training from PeterYuta, Joonho, and Suresh received the Basic
Laser Safety Training from Peter King today.
  
  3699   Tue Oct 12 17:42:57 2010 yutaUpdateSUSvery first measurement of Q-values for MC1Background:
 Data aquisition system is fixed,
and now we can use the Dataviewer to measure
 MC1ringdown.png 
  3700   Tue Oct 12 22:06:08 2010 yutaUpdateComputerscelan-installed CentOS 5.5 on mafaldaI clean-installed CentOS 5.5(32bit) on
mafalda.
No firewalls, no SELinix.
  
  3705   Wed Oct 13 11:09:28 2010 yutaUpdateComputersclean-installed CentOS 5.5 on mafaldaDear mafalda,
Sorry for leaving you alone.
We put ethernet cable in you. You
  
  3708   Wed Oct 13 18:01:43 2010 yutaHowToCDSeditting all the similar medm screens(Joe, Yuta)

Say, you want to edit all the similar
  
  3710   Thu Oct 14 00:04:46 2010 yutaUpdateSUSQ-value adjustment for MC dampingsBackground:
 We need MC to be locked soon,
so MC suspensions should be damped well(Q~5).
 MC2ringdown.png 
  3713   Thu Oct 14 01:09:17 2010 yutaUpdateIOOtried to lock MC but failed(Rana, Koji, Kiwamu, Suresh, Yuta)
 
  
  3717   Thu Oct 14 12:53:29 2010 yutaUpdatePSLmesured PMC's visibility vs power relationBackground:
 I measured the PMC's visibility
vs incident power relation last week to see
 PMCsetup.pngPDcalib.pngPMCreflect2.png 
  3722   Thu Oct 14 20:31:15 2010 yutaUpdateComputerspyNDS installationEDIT by kiwamu Dec.7th
;
  
  3723   Thu Oct 14 20:49:50 2010 yutaUpdateComputersautomated Q-value adjusterBackground:
 Now we can use pyNDS(see elog
 MC3_SUSPOS.png 
  3742   Tue Oct 19 21:10:27 2010 yutaUpdateCDSbad filter coefficients for every suspensions!(Koji, Yuta)

Summary:
  
  3744   Wed Oct 20 01:22:18 2010 yutaUpdateCDSfixed filters for MCs, but no damping(Rana, Yuta)

Summary:
 Screenshot.png 
  3748   Wed Oct 20 21:43:25 2010 yutaUpdateCDSchecking whitening filters for MCs and messed up(Joe, Yuta)

Background:
 MC2ULSEN.pngMC2LRSEN.png 
  3757   Thu Oct 21 21:35:16 2010 yutaUpdateCDSfixed whitening filter switches(Joe, Yuta)

Summary:
 LLLR.pngContec23BO.png 
  3758   Fri Oct 22 00:59:01 2010 yutaUpdateCDSnew MEDM screens, new filter banks(whitening and dewhitening related)(Joe, Yuta)

Summary:
 HappySideMEDM.png 
  3765   Fri Oct 22 19:53:27 2010 yutaSummaryCDSconversion failure in digital filters(Rana, Joe, Yuta)

We now understand that we never succeeded
  
  3767   Fri Oct 22 23:29:48 2010 yutaUpdateCDSfixed output filter switching(Joe, Yuta)

Summary:
  
  3769   Sat Oct 23 03:36:05 2010 yutaUpdateCDSfixed filters for C1SUS, C1RMS, C1MCS(Joe, Yuta)

Summary:
  
  3770   Sat Oct 23 14:42:01 2010 yutaSummaryCDSdamped MC suspensionsAfter replacing filters, MC suspensions
damped  last night.
Further measurement next time.
 dam.png 
  3785   Tue Oct 26 12:45:20 2010 yutaHowToCDSmaking a new master file for medm screens(Joe, Yuta)

 In elog
  
  3787   Tue Oct 26 16:02:55 2010 yutaHowToCDSthings to do after making a new Simulink model(Joe,Yuta)

Things to do after making a new Simulink
  
  3788   Tue Oct 26 17:31:17 2010 yutaUpdateCDSfixed OPLEV stuff and MCL filters(Joe, Yuta)

Background:
 optlevMC2.png 
  3805   Thu Oct 28 03:39:58 2010 yutaUpdateIOOgot very stable MC locking(Rana, Suresh, Jenne, Kiwamu, Kevin,
Yuta)
 C1IOO_MC_SERVO20101028.pngMCrocks!.png 
  3807   Thu Oct 28 04:28:50 2010 yutaUpdateGreen Lockingchecked frequency counter SR620(Kiwamu, Yuta)

Background:
  
  3813   Thu Oct 28 20:08:26 2010 yutaUpdateGreen Lockingrevised RF amp cascadingBackground:
  Yesterday, I said I will use
ZHL-32A for amplifying beat note signal,
  
  3814   Thu Oct 28 21:20:11 2010 yutaUpdateCDSFlaky fb, tried DAQ re-install, but no helpSummary:
  Unfortunately, fb is flakier
than normal. 
  
  3815   Thu Oct 28 23:17:15 2010 yutaSummaryCDS[EMERGENCY] accidentally deleted daqdRana showed me that if c1sus machine runs
c1mcs stuff(and c1x02 stuff) only, we can
use dataviewer without crashing fb.
  
  3828   Fri Oct 29 18:37:33 2010 yutaSummaryCDSdaqd and current CDS statusBackground:
  Before Joe left(~ 1 hour ago),
fb was working for a while. But after he
 06-25-2009.NN_24ThreatLevel.GJH2L69BK.1.jpg 
  3829   Sat Oct 30 05:27:53 2010 yutaSummaryCDSCDS time delay measurementMotivation:
  We want to know the time delay
of CDS in the IOP scheme.
 delaysetup.pngCDSdelay.png 
  3838   Mon Nov 1 15:47:15 2010 yutaSummaryCDSCDS time delay measurementBackground:
  I measured CDS time delay last
week, but because of my lack of understanding
 downupsampling.pngCDSdelay2.png 
  3841   Mon Nov 1 19:32:08 2010 yutaSummaryCDSfb crashed? during c1ioo and c1mcs connection at ASCFrame builder
died again!!
  
  3842   Mon Nov 1 23:31:05 2010 yutaUpdateCDSchecked input hardware filter in single frequencyBackground:
  For input filter, we have analog
whitening filter and also digital whitening
  
  3849   Wed Nov 3 02:23:11 2010 yutaSummaryCDSchecking whitening filter boardSummary:
  Last night, I found that some
of the input channels have wrong hardware
 MC3SEN.png 
  3850   Wed Nov 3 02:37:39 2010 yutaSummaryGreen Lockingcoarse locked green beat frequency(Kiwamu, Yuta)

 Screenshot_LowFreqLock.png 
  3857   Wed Nov 3 21:19:40 2010 yutaUpdateCDSput LOCKIN to c1ioo model and checked(Joe, Yuta)

Summary:
 Screenshot_C1IOO_LOCKIN.png 
  3863   Thu Nov 4 17:53:29 2010 yutaUpdateCDSprimitive python script for A2L measurementSummary:
 
I wrote
 a2ltest.png 
  3868   Fri Nov 5 14:06:19 2010 yutaUpdateIOOtried to align MC by A2L measurement(Suresh, Kiwamu, Yuta)

Summary:
 A2LmeasurementFigures.png 
  3876   Sat Nov 6 07:26:54 2010 yutaSummaryIOOreduced common mode displacement of the beam through MC1 to MC3(Koji, Suresh, Yuta)

Summary:
 A2LMCalign.png 
  3883   Tue Nov 9 05:40:12 2010 yutaSummaryIOOMC aligning going on(Suresh, Yuta)

Background:
 MCalignNov9.png 
  3884   Wed Nov 10 02:51:35 2010 yutaSummaryIOOlimitation of current MC aligning(Suresh, Yuta)

Summary:
 MCalignNov9.png 
  3886   Wed Nov 10 12:21:18 2010 yutaSummaryIOOlimitation of current MC aligning1. We didn't measure the aperture size
last night. We have to check that.
  
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