 Tue Oct 12 17:42:57 2010, yuta, Update, SUS, very first measurement of Q-values for MC1 
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Background:
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. |
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Tue Oct 12 22:06:08 2010, yuta, Update, Computers, celan-installed CentOS 5.5 on mafalda
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I clean-installed CentOS 5.5(32bit) on mafalda.
No firewalls, no SELinix. |
 Wed Oct 13 11:09:28 2010, yuta, Update, Computers, clean-installed CentOS 5.5 on mafalda
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Dear mafalda,
Sorry for leaving you alone.
We put ethernet cable in you. You can talk to everyone now! |
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Wed Oct 13 18:01:43 2010, yuta, HowTo, CDS, editting all the similar medm screens
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(Joe, Yuta)
Say, you want to edit all the similar medm screens named C1SUS_NAME_XXX.adl. |
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Thu Oct 14 00:04:46 2010, yuta, Update, SUS, Q-value adjustment for MC dampings
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Background:
We need MC to be locked soon, so MC suspensions should be damped well(Q~5).
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Thu Oct 14 01:09:17 2010, yuta, Update, IOO, tried to lock MC but failed
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(Rana, Koji, Kiwamu, Suresh, Yuta)
We attempted to lock the MC and finally got flashes of the MC,
but no luck. |
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Thu Oct 14 12:53:29 2010, yuta, Update, PSL, mesured PMC's visibility vs power relation
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Background:
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). |
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Thu Oct 14 20:31:15 2010, yuta, Update, Computers, pyNDS installation
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EDIT by kiwamu Dec.7th ;
The Pynds package has been moved to the appropriate place: |
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Thu Oct 14 20:49:50 2010, yuta, Update, Computers, automated Q-value adjuster
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Background:
Now we can use pyNDS(see elog #3722), so I wrote a python script that adjusts Q-value
automatically. |
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Tue Oct 19 21:10:27 2010, yuta, Update, CDS, bad filter coefficients for every suspensions!
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(Koji, Yuta)
Summary: |
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Wed Oct 20 01:22:18 2010, yuta, Update, CDS, fixed filters for MCs, but no damping
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(Rana, Yuta)
Summary: |
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Wed Oct 20 21:43:25 2010, yuta, Update, CDS, checking whitening filters for MCs and messed up
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(Joe, Yuta)
Background: |
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Thu Oct 21 21:35:16 2010, yuta, Update, CDS, fixed whitening filter switches
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(Joe, Yuta)
Summary: |
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Fri Oct 22 00:59:01 2010, yuta, Update, CDS, new MEDM screens, new filter banks(whitening and dewhitening related)
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(Joe, Yuta)
Summary: |
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Fri Oct 22 19:53:27 2010, yuta, Summary, CDS, conversion failure in digital filters
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(Rana, Joe, Yuta)
We now understand that we never succeeded in converting old fiter files to new filter files. |
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Fri Oct 22 23:29:48 2010, yuta, Update, CDS, fixed output filter switching
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(Joe, Yuta)
Summary: |
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Sat Oct 23 03:36:05 2010, yuta, Update, CDS, fixed filters for C1SUS, C1RMS, C1MCS
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(Joe, Yuta)
Summary: |
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Sat Oct 23 14:42:01 2010, yuta, Summary, CDS, damped MC suspensions
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After replacing filters, MC suspensions damped last night.
Further measurement next time. |
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Tue Oct 26 12:45:20 2010, yuta, HowTo, CDS, making a new master file for medm screens
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(Joe, Yuta)
In elog #3708, we showed how to edit all the similar medm screens easiliy. |
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Tue Oct 26 16:02:55 2010, yuta, HowTo, CDS, things to do after making a new Simulink model
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(Joe,Yuta)
Things to do after making a new Simulink model. |
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Tue Oct 26 17:31:17 2010, yuta, Update, CDS, fixed OPLEV stuff and MCL filters
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(Joe, Yuta)
Background: |
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Thu Oct 28 03:39:58 2010, yuta, Update, IOO, got very stable MC locking
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(Rana, Suresh, Jenne, Kiwamu, Kevin, Yuta)
Summary: |
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Thu Oct 28 04:28:50 2010, yuta, Update, Green Locking, checked frequency counter SR620
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(Kiwamu, Yuta)
Background: |
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Thu Oct 28 20:08:26 2010, yuta, Update, Green Locking, revised RF amp cascading
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Background:
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 |
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Thu Oct 28 21:20:11 2010, yuta, Update, CDS, Flaky fb, tried DAQ re-install, but no help
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Summary:
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 |
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Thu Oct 28 23:17:15 2010, yuta, Summary, CDS, [EMERGENCY] accidentally deleted daqd
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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.
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Fri Oct 29 18:37:33 2010, yuta, Summary, CDS, daqd and current CDS status
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Background:
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. |
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Sat Oct 30 05:27:53 2010, yuta, Summary, CDS, CDS time delay measurement
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Motivation:
We want to know the time delay of CDS in the IOP scheme.
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Mon Nov 1 15:47:15 2010, yuta, Summary, CDS, CDS time delay measurement
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Background:
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 |
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Mon Nov 1 19:32:08 2010, yuta, Summary, CDS, fb crashed? during c1ioo and c1mcs connection at ASC
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Frame builder died again!!
Background: |
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Mon Nov 1 23:31:05 2010, yuta, Update, CDS, checked input hardware filter in single frequency
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Background:
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. |
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Wed Nov 3 02:23:11 2010, yuta, Summary, CDS, checking whitening filter board
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Summary:
Last night, I found that some of the input channels have wrong hardware filter switching(see elog
#3842). |
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Wed Nov 3 02:37:39 2010, yuta, Summary, Green Locking, coarse locked green beat frequency
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(Kiwamu, Yuta)
We succeeded in coarse locking the green beat frequency, using |
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Wed Nov 3 21:19:40 2010, yuta, Update, CDS, put LOCKIN to c1ioo model and checked
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(Joe, Yuta)
Summary: |
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Thu Nov 4 17:53:29 2010, yuta, Update, CDS, primitive python script for A2L measurement
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Summary:
I wrote a python script for A2L measurement.
Currently it is really primitive, but I tested the basic functionality of the script. |
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Fri Nov 5 14:06:19 2010, yuta, Update, IOO, tried to align MC by A2L measurement
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(Suresh, Kiwamu, Yuta)
Summary: |
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Sat Nov 6 07:26:54 2010, yuta, Summary, IOO, reduced common mode displacement of the beam through MC1 to MC3
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(Koji, Suresh, Yuta)
Summary: |
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Tue Nov 9 05:40:12 2010, yuta, Summary, IOO, MC aligning going on
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(Suresh, Yuta)
Background: |
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Wed Nov 10 02:51:35 2010, yuta, Summary, IOO, limitation of current MC aligning
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(Suresh, Yuta)
Summary: |
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Wed Nov 10 12:21:18 2010, yuta, Summary, IOO, limitation of current MC aligning
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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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Thu Nov 11 04:32:53 2010, yuta, Summary, CDS, found poor contact of DAC cable, previous A2L results were wrong
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(Koji, Jenne, Yuta)
We found one of DAC cables had a poor contact. |
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Thu Nov 11 05:56:04 2010, yuta, Summary, IOO, setting up temporary oplev for coil balancing of MCs
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(Suresh, Yuta)
Background: |
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Fri Nov 12 06:10:24 2010, yuta, Update, IOO, MC aligned (without coil balancing)
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Background:
Last night, we found that one of DAC channels are poorly connected, so we fixed the connectors.
Rana and Koji used their incredible eyeballs to roughly align MC. |
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Sat Nov 13 15:53:05 2010, yuta, Update, CDS, diagonalization of MC input matrix
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Motivation:
MC is aligned from the A2L measurement, but to do the beam centering more precisely, we need coils to be balanced.
There are several ways to balance the coils, like using oplev or WFS QPD RF channels. |
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Tue Nov 16 03:33:22 2010, yuta, Update, IOO, aligned Faraday, beam reached SM just before PRM
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(Koji, Yuta)
We aligned the Faraday after MC and we are now ready to install PRM. |
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Wed Nov 17 02:53:41 2010, yuta, Update, IOO, placed new PRM to BS table
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(Kiwamu, Yuta)
Background: |
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Wed Nov 17 20:44:59 2010, yuta, Summary, CDS, no QPD channels on c1sus machine today
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(Joe, Suresh, Yuta)
Currently, only 2 ADC cards work on c1sus machine. |
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Thu Nov 18 00:40:31 2010, yuta, Update, IOO, PRM reflected beam reached AP table
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(Kiwamu, Yuta)
Summary: |
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Thu Nov 18 16:32:21 2010, yuta, Summary, CDS, current damping status for all optics c1sus handles
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Summary:
I set Q-values for each ringdown of PRM, BS, ITMX, ITMY, MC1, MC2, MC3 to ~5 using QAdjuster.py.
Here are the results; |
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Fri Nov 19 17:12:22 2010, yuta, Update, CDS, ETMX damped, but with weird TO_COIL matrix
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Background:
c1iscex machine is currently being setup and RT model c1scx is running.
But ETMX(south) didn't seem to be damped, so I checked it. |
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