 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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Sat Nov 20 01:58:56 2010, yuta, HowTo, CDS, editting RT models and MEDM screens
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(Suresh, Yuta)
If you come up with a good idea and want to add new things to current RT model; |
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Sat Nov 20 02:25:30 2010, yuta, Update, CDS, 2 LOCKINs for suspension models
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(Suresh, Koji, Yuta)
Background: |
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Sat Nov 20 03:37:11 2010, yuta, Summary, CDS, CDS time delay measurement - the ripple
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(Koji, Joe, Yuta)
Motivation: |
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Mon May 21 21:27:39 2012, yuta, Update, CDS, MEDM suspension screens using macro
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Background:
We need more organized MEDM screens. Let's use macro.
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Tue May 22 20:46:38 2012, yuta, Update, CDS, MEDM suspension screens using macro
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I fixed the problem Jamie pointed out in elog #6657 and #6659.
What I did: |
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Thu May 24 16:13:05 2012, yuta, Update, Computers, ASS scripts on new ubuntu machines
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[Den, Yuta]
Background: |
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Tue May 29 21:05:30 2012, yuta, Update, IOO, PMC, MC alignment are shit
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Quote:
[Keiko, Jenne] |
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Wed May 30 01:35:15 2012, yuta, Update, Green Locking, aligned Y arm green beam
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[Jenne, Yuta]
We aligned the Y arm for IR (C1:LSC-TRY_OUT is now ~ 0.9), and aligned the green beam from the ETMY table. The Y arm green is now resonating in
TEM00 mode, but we need some monitors (green trans or green refl) to maximize the coupling. |
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Wed May 30 15:51:22 2012, yuta, Update, IOO, MC beam spot oscillation
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[Koji, Suresh, Jenne, Yuta]
Background:
We noticed that the beam spots on MC mirrors are oscillating in ~ 1 Hz yesterday. It means MC mirrors are actually oscillating. This was |
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Wed May 30 19:27:38 2012, yuta, Update, IOO, MC beam spot oscillation
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[Koji, Yuta]
We found that C1:SUS-MC{1,2,3}_TO_COIL_3_4_GAIN was somehow changed to -1, and feedback signal
for SIDE was fedback to LLCOIL, which is apparently not correct. |
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Thu May 31 01:27:16 2012, yuta, Update, Green Locking, PSL and Y arm green beams aligned
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[Jenne, Yuta]
We aligned the PSL green optics so that the PSL green beam and Y arm green beam interfere. 2 beams are now hitting the Y arm beat PD. The DC level
from the beat PD is about 13 mV. |
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Thu May 31 01:36:17 2012, yuta, Update, Green Locking, GREEN_TRX/GREEN_TRY PDs
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I did the cabling for monitoring DC transmission of the green beam from the end table.
The two PDs are called GREEN TRX and GREEN TRY, and the channel names are C1:GCV-GREEN_TRX and C1:GCV-GREEN_TRY.
The two signal from the PDs go to the ADC_0 card of the c1ioo computer. |
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Thu May 31 02:27:24 2012, yuta, Update, IOO, script for reliefing MC WFS
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I wrote a simple script for reliefing MC WFS servo. The script is located at /opt/rtcds/caltech/c1/scripts/MC/reliefMCWFS.
It simply uses ezcaservo to minimize the offset of the WFS feedback signal using MC alignment sliders.
ezcaservo -r C1:SUS-MC${optic}_ASC${dof}_OUT16 -s 0 -g 0.0001 -t 10 C1:SUS-MC${optic}_${dof}_COMM
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Thu May 31 04:03:17 2012, yuta, Update, IOO, script for MC beam spot measurement
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I wrote a wrapping script for measuring MC beam spot. We had to run several scripts for the measurement (see elog #6688),
but now, you only need to run /opt/rtcds/caltech/c1/scripts/ASS/MC/mcassMCdecenter.
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Thu May 31 16:19:07 2012, yuta, Update, Green Locking, temperature setting for PSL doubling crystal
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I fixed the temperature control of the oven for the PSL doubling crystal.
The PID settings were not good, and also, TC200 was beging DETUNED. So, I activated TUNE function and adjusted PID settings.
I'm not sure what the DETUNE function is for. The manual can be found here; |
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Sat Jun 2 03:19:37 2012, yuta, Update, Green Locking, Y green beat note found? - too small
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Summary:
I tried to find Y arm green beat in order to do the mode scan.
I found a beat peak(see attached picture), but the amplitude seems too small. |
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Tue Jun 5 21:09:40 2012, yuta, Update, Computer Scripts / Programs, hacked ezca tools
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Currently, ezca tools are flakey and fails too much.
So, I hacked ezca tools just like Yoichi did in 2009 (see elog #1368).
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Wed Jun 6 02:28:02 2012, yuta, Update, Green Locking, tried to see Yarm length change with weak beat note
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[Jenne, Yuta]
Summary: |
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Wed Jun 6 15:16:00 2012, yuta, Update, IOO, MC WFS offsets adjusted
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MC reflection (C1:IOO-MC_RFPD_INMON) got worse when WFS servos were on. After aligning MC optics, it will be ~0.5 but if I turned on WFS, it became ~0.8.
I measured the beam spot positions on MC optics. They seemed like the same from the measurement yesterday.
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Wed Jun 6 21:11:45 2012, yuta, Update, Green Locking, improved Y arm green alignment
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Summary:
Y arm green transmission to the PSL table improved from ~ 20 uW to 61 uW. Improvement was done by adjusting steering mirrors before and after
the faraday on the Y end table. |
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Thu Jun 7 01:46:05 2012, yuta, Summary, Green Locking, Y green beat - found it!!
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I found the big big Y green beat. Details will be posted later.
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Thu Jun 7 02:25:27 2012, yuta, Update, Green Locking, improved Y arm green alignment - even more
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[Koji, Yuta]
Summary: |
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Thu Jun 7 02:59:31 2012, yuta, Update, Green Locking, Y green beat - found it!!
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Summary:
I found the big green beat note for the Y arm. The alignment of the green optics on the PSL table was crappy.
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Thu Jun 7 03:37:26 2012, yuta, Update, CDS, mx_stream restarted on c1lsc, c1ioo
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c1lsc and c1ioo computers had FB net statuses all red. So, I restarted mx_stream on each computer.
ssh controls@c1lsc
sudo /etc/init.d/mx_stream restart |
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Thu Jun 7 05:39:41 2012, yuta, Update, Green Locking, coarsely stabilized Y arm length with ALS
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I coarsely stabilized Y arm length to off resonance point for IR using ALS.
Currently, ASL servo loop is unstable and oscillates so much that I can't hold the length to the resonance point.
We need more investigation on the servo loop before doing the mode scan. |
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