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New entries since:Wed Dec 31 16:00:00 1969
Entry  Mon Oct 4 19:48:00 2010, yuta, Update, VAC, several mirrors installed to ITMX/BS chamber P1060901.JPGP1060904.JPG
(Koji, Kiwamu, Yuta)
Lots of progress for the optics placement in the vacuum chamber.
Entry  Tue Oct 5 21:22:46 2010, yuta, Update, VAC, green beam reached PSL table IMG_3627.jpg
! We got the green light coming out from the OMC chamber to the PSL table !
Entry  Thu Oct 7 14:39:50 2010, yuta, Update, PSL, measured PMC's laser power-output relation PMCreflect.png
(Rana, Yuta)

    Reply  Thu Oct 7 16:34:06 2010, yuta, Update, PSL, measured PMC's laser power-output relation PMCvis.png
 Attached is the visibility vs incident power(assuming output of the PD is proportional to the input laser power).
 Ideally, the graph should be flat. (In another words, attached graph in the elog #3667 shoud be linear.)
Entry  Thu Oct 7 17:53:07 2010, yuta, Update, Computers, Farfalla with Firefox, fixed 
(Kiwamu, Yuta)

Entry  Thu Oct 7 23:24:44 2010, yuta, Update, CDS, checking MC1 suspension damping 
 The new CDS is currently being set up.
 We want to see if the damping servo of the suspensions are working correctly.
Entry  Mon Oct 11 16:09:10 2010, yuta, Summary, SUS, current OSEM outputs 
 The output range of the OSEM is 0-2V.
 So, the OSEM output should fluctuate around 1V.
Entry  Mon Oct 11 17:31:44 2010, yuta, Update, CDS, Activation of DAQ channels for 8 optics 
(Joe, Yuta)

Entry  Mon Oct 11 22:04:28 2010, yuta, Update, CDS, damping for MCs are basically working SUS-MC1.pngSUS-MC2.pngSUS-MC3.png
 Even if we can't use the Dataviewer to get the time series of each 4 DOF displacements, we can still use StripTool to monitor the ringdowns
and see if the damping servo is working.
Entry  Tue Oct 12 15:51:18 2010, yuta, Bureaucracy, SAFETY, the 40m squad received safety training from Peter 
Yuta, Joonho, and Suresh received the Basic Laser Safety Training from Peter King today.

Now, we got homework.
Entry  Tue Oct 12 17:42:57 2010, yuta, Update, SUS, very first measurement of Q-values for MC1 MC1ringdown.png
 Data aquisition system is fixed, and now we can use the Dataviewer to measure Q-values of the ringdowns for each DOF, each optics.
 First of all, I measured MC1 suspention damping servo for a test.
Entry  Tue Oct 12 22:06:08 2010, yuta, Update, Computers, celan-installed CentOS 5.5 on mafalda 
I clean-installed CentOS 5.5(32bit) on mafalda.
No firewalls, no SELinix.
    Reply  Wed Oct 13 11:09:28 2010, yuta, Update, Computers, clean-installed CentOS 5.5 on mafalda 
Dear mafalda,
Sorry for leaving you alone.
We put ethernet cable in you. You can talk to everyone now!
Entry  Wed Oct 13 18:01:43 2010, yuta, HowTo, CDS, editting all the similar medm screens 
(Joe, Yuta)

Say, you want to edit all the similar medm screens named C1SUS_NAME_XXX.adl.
Entry  Thu Oct 14 00:04:46 2010, yuta, Update, SUS, Q-value adjustment for MC dampings MC2ringdown.png
 We need MC to be locked soon, so MC suspensions should be damped well(Q~5).
Entry  Thu Oct 14 01:09:17 2010, yuta, Update, IOO, tried to lock MC but failed 
(Rana, Koji, Kiwamu, Suresh, Yuta)
 We attempted to lock the MC and finally got flashes of the MC,
but no luck. 
    Reply  Thu Oct 14 12:53:29 2010, yuta, Update, PSL, mesured PMC's visibility vs power relation PMCsetup.pngPDcalib.pngPMCreflect2.png
 I measured the PMC's visibility vs incident power relation last week to see the thermal effect, but I didn't calibrated the laser power(see
elog #3672).
Entry  Thu Oct 14 20:31:15 2010, yuta, Update, Computers, pyNDS installation 
EDIT by kiwamu Dec.7th ;

The Pynds package has been moved to the appropriate place:
Entry  Thu Oct 14 20:49:50 2010, yuta, Update, Computers, automated Q-value adjuster MC3_SUSPOS.png
 Now we can use pyNDS(see elog #3722), so I wrote a python script that adjusts Q-value
Entry  Tue Oct 19 21:10:27 2010, yuta, Update, CDS, bad filter coefficients for every suspensions! 
(Koji, Yuta)

    Reply  Wed Oct 20 01:22:18 2010, yuta, Update, CDS, fixed filters for MCs, but no damping Screenshot.png
(Rana, Yuta)

Entry  Wed Oct 20 21:43:25 2010, yuta, Update, CDS, checking whitening filters for MCs and messed up MC2ULSEN.pngMC2LRSEN.png
(Joe, Yuta)

    Reply  Thu Oct 21 21:35:16 2010, yuta, Update, CDS, fixed whitening filter switches LLLR.pngContec23BO.png
(Joe, Yuta)

    Reply  Fri Oct 22 00:59:01 2010, yuta, Update, CDS, new MEDM screens, new filter banks(whitening and dewhitening related) HappySideMEDM.png
(Joe, Yuta)

Entry  Fri Oct 22 19:53:27 2010, yuta, Summary, CDS, conversion failure in digital filters 
(Rana, Joe, Yuta)

We now understand that we never succeeded in converting old fiter files to new filter files.
    Reply  Fri Oct 22 23:29:48 2010, yuta, Update, CDS, fixed output filter switching 
(Joe, Yuta)

    Reply  Sat Oct 23 03:36:05 2010, yuta, Update, CDS, fixed filters for C1SUS, C1RMS, C1MCS 
(Joe, Yuta)

Entry  Sat Oct 23 14:42:01 2010, yuta, Summary, CDS, damped MC suspensions dam.png
After replacing filters, MC suspensions damped  last night.
Further measurement next time.
    Reply  Tue Oct 26 12:45:20 2010, yuta, HowTo, CDS, making a new master file for medm screens 
(Joe, Yuta)

 In elog #3708, we showed how to edit all the similar medm screens easiliy.
Entry  Tue Oct 26 16:02:55 2010, yuta, HowTo, CDS, things to do after making a new Simulink model 

Things to do after making a new Simulink model.
Entry  Tue Oct 26 17:31:17 2010, yuta, Update, CDS, fixed OPLEV stuff and MCL filters optlevMC2.png
(Joe, Yuta)

Entry  Thu Oct 28 03:39:58 2010, yuta, Update, IOO, got very stable MC locking C1IOO_MC_SERVO20101028.pngMCrocks!.png
(Rana, Suresh, Jenne, Kiwamu, Kevin, Yuta)

Entry  Thu Oct 28 04:28:50 2010, yuta, Update, Green Locking, checked frequency counter SR620 
(Kiwamu, Yuta)

    Reply  Thu Oct 28 20:08:26 2010, yuta, Update, Green Locking, revised RF amp cascading 
  Yesterday, I said I will use ZHL-32A for amplifying beat note signal, but as Koji pointed out, ZHL-32A is for medium high power.
  So I changed my mind to use ZFL-1000LN instead. ZFL-1000LN is a low noise RF amp whose maximum
    Reply  Thu Oct 28 21:20:11 2010, yuta, Update, CDS, Flaky fb, tried DAQ re-install, but no help 
  Unfortunately, fb is flakier than normal. We can't use dataviewer and diaggui now.
  I thought it might be because editting .ini files(list of DAQ channels) in /cvs/cds/rtcds/caltech/c1/chans/daq/ without using GUI
Entry  Thu Oct 28 23:17:15 2010, yuta, Summary, CDS, [EMERGENCY] accidentally deleted daqd 
Rana showed me that if c1sus machine runs c1mcs stuff(and c1x02 stuff) only, we can use dataviewer without crashing fb.
Also, if we set correct NDS server and port(fb/8088), we can use diaggui on every machine.
Entry  Fri Oct 29 18:37:33 2010, yuta, Summary, CDS, daqd and current CDS status 06-25-2009.NN_24ThreatLevel.GJH2L69BK.1.jpg
  Before Joe left(~ 1 hour ago), fb was working for a while. But after he left, daqd core dumped.
  This is maybe because we started c1sus and c1rms again for a delay measurement,  just before he left.
Entry  Sat Oct 30 05:27:53 2010, yuta, Summary, CDS, CDS time delay measurement delaysetup.pngCDSdelay.png
  We want to know the time delay of CDS in the IOP scheme.
    Reply  Mon Nov 1 15:47:15 2010, yuta, Summary, CDS, CDS time delay measurement downupsampling.pngCDSdelay2.png
  I measured CDS time delay last week, but because of my lack of understanding the system, it was incorrect.
  IOP has an anti-aliasing filter before downsampling from 64kHz(65536Hz) to 16kHz(16384Hz) and also has an anti-imaging filter before upsampling
Entry  Mon Nov 1 19:32:08 2010, yuta, Summary, CDS, fb crashed? during c1ioo and c1mcs connection at ASC 
Frame builder died again!!

    Reply  Mon Nov 1 23:31:05 2010, yuta, Update, CDS, checked input hardware filter in single frequency 
  For input filter, we have analog whitening filter and also digital whitening filter. They have the same TF and when analog one is off, digital
one should be on and vice versa.
Entry  Wed Nov 3 02:23:11 2010, yuta, Summary, CDS, checking whitening filter board MC3SEN.png
  Last night, I found that some of the input channels have wrong hardware filter switching(see elog
Entry  Wed Nov 3 02:37:39 2010, yuta, Summary, Green Locking, coarse locked green beat frequency Screenshot_LowFreqLock.png
(Kiwamu, Yuta)

We succeeded in coarse locking the green beat frequency, using
    Reply  Wed Nov 3 21:19:40 2010, yuta, Update, CDS, put LOCKIN to c1ioo model and checked Screenshot_C1IOO_LOCKIN.png
(Joe, Yuta)

Entry  Thu Nov 4 17:53:29 2010, yuta, Update, CDS, primitive python script for A2L measurement a2ltest.png
  I wrote a python script for A2L measurement.
 Currently it is really primitive, but I tested the basic functionality of the script.
    Reply  Fri Nov 5 14:06:19 2010, yuta, Update, IOO, tried to align MC by A2L measurement A2LmeasurementFigures.png
(Suresh, Kiwamu, Yuta)

Entry  Sat Nov 6 07:26:54 2010, yuta, Summary, IOO, reduced common mode displacement of the beam through MC1 to MC3 A2LMCalign.png
(Koji, Suresh, Yuta)

    Reply  Tue Nov 9 05:40:12 2010, yuta, Summary, IOO, MC aligning going on MCalignNov9.png
(Suresh, Yuta)

    Reply  Wed Nov 10 02:51:35 2010, yuta, Summary, IOO, limitation of current MC aligning MCalignNov9.png
(Suresh, Yuta)

    Reply  Wed Nov 10 12:21:18 2010, yuta, Summary, IOO, limitation of current MC aligning 
1. We didn't measure the aperture size last night. We have to check that.

2. We have to measure the length of FI. Or find a document on this FI.
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