| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
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155
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Sun Dec 2 21:07:39 2007 |
rana | Configuration | IOO | MC SUS re-alignment | [COLOR=darkblue][CODE]you asked for: diff
2007/12/01,4:58:48 2007/12/03,4:58:48 utc
'MC.*COMM'
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156
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Sun Dec 2 21:13:16 2007 |
rana | Configuration | IOO | MC SUS re-alignment | |
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17207
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Tue Oct 25 05:26:24 2022 |
rana | Summary | IOO | MC SUS tuning | in looking closer at the IMC WFS performance
I notice 2 issues:
the watchdog thresholds |
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17260
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Fri Nov 11 19:47:04 2022 |
rana | Update | SUS | MC SUS were overdamped: damping gains all reduced | After clicking on the extra MC1 unwhitening
filter, I was going to retune the damping
gains to give a Q ~ 5 for the suspension. |
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706
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Mon Jul 21 11:54:00 2008 |
Jenne | Update | General | MC Servo Board | I pulled the MC Servo Board again, to check
the components that are on the board, and
compare them with the schematics. The filters |
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1315
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Mon Feb 16 23:09:52 2009 |
rana | Update | Electronics | MC Servo Board offset gone bad! | The attached plot shows that someone broke
the MC_SUM_MON channel around 10:30 AM this
past Wednesday the 11th. This is the EPICS |
|
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4331
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Sun Feb 20 21:22:33 2011 |
rana, kiwamu, valera | Configuration | IOO | MC Servo Change | For some reason, Kiwamu |
|
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7198
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Wed Aug 15 18:56:46 2012 |
Yoichi | Update | IOO | MC Servo Transfer Function Measurements | I started working on the characterization
of the MC servo.
The current MC servo topology is |
|
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7201
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Thu Aug 16 01:52:52 2012 |
Yoichi | Update | IOO | MC Servo Transfer Function Measurements |
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6x |
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7202
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Thu Aug 16 05:08:38 2012 |
Yoichi | Update | IOO | MC Servo Transfer Function Measurements |
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9714
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Tue Mar 11 15:01:28 2014 |
ericq | Update | Computer Scripts / Programs | MC Signal Monitoring | Two weeks ago (Feb 26) I took the "Q
MON" output of the demodulator that
sends its Q output to the MC servo board |
|
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5866
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Thu Nov 10 20:20:57 2011 |
Suresh | Update | IOO | MC Spot positions have shifted after accelerometer installation on MC2 chamber | [ Jenne, Suresh ]
We were tying the fix the WFS and
noticed that the PSL --> MC alignment |
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7290
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Mon Aug 27 23:52:59 2012 |
Jenne | Update | IOO | MC Spots centered | Finally!
Jamie and I have the MC spots centered.
We did the normal move the input beam, realign |
|
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3242
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Sun Jul 18 20:50:03 2010 |
rana | Configuration | IOO | MC TRANS optics changed | To make the beam on the MC trans camera
bigger, I removed the lens + ND filter that
was in that path. |
|
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91
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Sun Nov 11 21:05:55 2007 |
rana | HowTo | SUS | MC Touching or not | I wrote a script: [I]SUS/freeswing-mc.csh[/I],
which gives the MC mirrors the appropriate
kicks
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4106
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Tue Jan 4 15:12:33 2011 |
Suresh | Update | IOO | MC Trans Mon QPD gain decreased by 10 | Decreased
the gain of MC-Trans-Mon QPD ckt
The |
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3882
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Mon Nov 8 18:30:33 2010 |
Suresh | Update | IOO | MC Trans Mon QPD gain increased by 50x | Increased
the transimpedance gain of the MC-Trans-Mon
QPD ckt |
|
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2256
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Thu Nov 12 16:13:05 2009 |
Alberto | Update | PSL | MC Trans Offset | On Rana's suggestion I checked the MC
transmission QPD (C1:IOO-MC_TRANS_SUM). I
found that the readout is almost zero when |
|
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2258
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Thu Nov 12 17:15:43 2009 |
Koji | Update | PSL | MC Trans Offset | OK. I have been keeping my eyes on the
MC transmission. In deed, the MC trans has
been well kept at around 7.7 since the last |
|
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2260
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Thu Nov 12 17:42:04 2009 |
Koji | Update | PSL | MC Trans Offset | PC_DRIVE is also improving after the last
PSL work!
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5009
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Wed Jul 20 23:31:44 2011 |
Suresh | Update | IOO | MC Trans QPD is down |
The
mode cleaner is not locking because |
|
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5012
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Thu Jul 21 12:19:29 2011 |
Jamie, Kiwamu | Update | IOO | MC Trans QPD working, now locking | It turns out that the MC_TRANS_SUM signal
was being derived from the SUS-MC2_OL_SUM_INMON
channel in the ioo.db file. |
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5612
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Tue Oct 4 14:41:47 2011 |
Jenne | Update | IOO | MC Trans channels are digital 0 | I relocked the PMC (why is it unlocking
so much lately??), and then noticed that
even though the MC is locked, MC Trans Sum, |
|
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5614
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Tue Oct 4 15:57:30 2011 |
Suresh | Update | IOO | MC Trans channels are digital 0 |
I thought this problem might be arising
because the MC2_TRANS QPD signals are not
being passed from the c1mcs to c1ioo models |
|
|
14950
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Tue Oct 8 10:29:19 2019 |
gautam | Update | IOO | MC Transmission scan | Summary:
There is ~ 7% variation
in the power seen by the MC2 trans QPD, depending |
|
|
1080
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Thu Oct 23 23:09:18 2008 |
Yoichi | Update | PSL | MC UGF is now 75kHz | I measured three loop transfer functions of
the MC servo.
The blue curve in the first attachment is |
|
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372
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Wed Mar 12 23:05:44 2008 |
rana | Update | IOO | MC WFS | they are bad, somewhat
please fix |
|
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601
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Mon Jun 30 09:46:15 2008 |
John | Update | IOO | MC WFS | MC WFS are on. They seem to do some good during
the day. |
|
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1556
|
Thu May 7 17:59:23 2009 |
Alberto | Configuration | | MC WFS | This afternoon the MC could not get locked.
I
first checked the Osems values at the MC
mirrors and compared them to the trend of |
|
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868
|
Thu Aug 21 18:13:24 2008 |
rana | Update | IOO | MC WFS Control signals not responsible for lock losses | This is a 4 hour, second-trend of the MC WFS
error and control signals.
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|
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867
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Thu Aug 21 17:55:14 2008 |
rana | HowTo | IOO | MC WFS DC Offsets | I ran the McWFS_dc_offsets script to trim
out the DC offsets on the MC WFS DC signals.
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12640
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Wed Nov 23 20:08:51 2016 |
Koji, rana | Update | IOO | MC WFS Demod/Whitening boards removed from the IOO rack | We removed one set of the MC WFS
demod board and whitening board from the
IOO rack for the investigation. |
|
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5683
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Mon Oct 17 23:56:34 2011 |
Suresh | Update | IOO | MC WFS Integrators switched on and WFS_MASTER screen updated | [Rana, Suresh]
To see if
the loops will stay locked when the Integrators |
|
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9207
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Sun Oct 6 20:55:08 2013 |
rana | Summary | ASC | MC WFS Limits set based on 40 days of trends | MC3 watchdog gets tripped sometimes when
lock is lost. I noticed that there were no
limits set in the MC WFS drive. The attached |
|
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454
|
Sun Apr 27 02:11:11 2008 |
rana | Configuration | IOO | MC WFS Notes | As noted in the elog from Friday, the WFS
has been bad ever since someone switched
on the digital whitening filters (FM1 & FM2)
|
|
|
11720
|
Wed Oct 28 14:07:44 2015 |
Koji | Update | IOO | MC WFS Offsets update | MC WFS offsets were updated to have a better
operating point.
|
|
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5668
|
Sat Oct 15 04:53:41 2011 |
Suresh | Update | IOO | MC WFS Output Matrix determination | After we had a
rough idea of what the output matrix looks
like (see this elog), |
|
|
5669
|
Sat Oct 15 10:58:32 2011 |
rana | Update | IOO | MC WFS Output Matrix determination | In order to save time and sanity, you
should not measure the pitch ->yaw and
yaw-> pitch. It makes things too complicated |
|
|
5904
|
Wed Nov 16 08:57:08 2011 |
Suresh | Update | IOO | MC WFS Servo OLG data and fits | I measured the Transfer Functions between
from IN2 to IN1 on the WFS1PIT, WFS2PIT,
WFS1YAW and WFS2YAW servo loops. |
|
|
5883
|
Sat Nov 12 03:46:55 2011 |
Suresh | Update | IOO | MC 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 |
rana | Update | IOO | MC 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 |
|
|
5892
|
Tue Nov 15 01:44:36 2011 |
Suresh | Update | IOO | MC WFS Servo: Open loop gain |
|
|
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5840
|
Tue Nov 8 12:07:08 2011 |
Suresh | Update | IOO | MC WFS Servo: suppression of WFS error signals below 3Hz | I switched on the WFS servos with the output
matrix (open loop) determined last Friday. |
|
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455
|
Sun Apr 27 05:09:30 2008 |
rana | Configuration | IOO | MC WFS Whitening turned on | I [B]hardwired on the MC WFS whitening[/B]
filters.
|
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17472
|
Mon Feb 20 14:20:04 2023 |
rana | Update | IOO | MC WFS Work1 | Made a comparison plot between
the WFS1 PIT loop and the model. There is
good agreement. |
|
|
17474
|
Mon Feb 20 16:35:15 2023 |
rana | Update | IOO | MC WFS Work1 | I added a less agressive low pass filter
to give some more phase margin, and then
increased the overall gain by 4x. There is |
|
|
10424
|
Fri Aug 22 15:11:55 2014 |
andres, nicolas | Summary | IOO | MC WFS activity | 1. Before doing anything, we centered the
IOO QPDs.
2. With the WFS enabled, we offloaded |
|
|
10425
|
Fri Aug 22 15:58:02 2014 |
Steve | Summary | IOO | MC WFS activity |
|
|
|
7452
|
Fri Sep 28 21:17:41 2012 |
Koji | Update | IOO | MC WFS adjustment | MC
WFS was fixed. Now it is running constantly
with the autolocker. |
|
|
7455
|
Mon Oct 1 11:08:25 2012 |
Jenne | Update | IOO | MC WFS adjustment |
|
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