ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
11516
|
Wed Aug 19 01:45:10 2015 |
Ignacio | Update | IOO | Doubly Improved SISO (T240-X) FF of MCL | Today I tried
and doubly-improved SISO FF filter on MCL.
This filter has a stronger rolloff than the |
6x |
11519
|
Thu Aug 20 11:09:10 2015 |
rana | Update | IOO | some points about seismic FF |
When plotting the subtraction performance,
we mainly care about the 0.5 - 10 Hz band,
so we care about the RMS in this band. Don't |
|
11522
|
Fri Aug 21 08:38:37 2015 |
Steve | Update | IOO | PMC locked | PMC needed to be locked manually. |
|
11529
|
Tue Aug 25 16:09:54 2015 |
ericq | Update | IOO | IMC Tweak | A little more information about the IMC
loop tweak...
I increased the overall IMC loop |
 |
11532
|
Thu Aug 27 01:41:41 2015 |
Ignacio | Update | IOO | Triply Improved SISO (T240-X) FF of MCL | |
    |
11535
|
Fri Aug 28 00:59:55 2015 |
Ignacio | Update | IOO | Final SISO FF Wiener Filter for MCL | This is my
final |
    |
11538
|
Fri Aug 28 19:05:53 2015 |
rana | Update | IOO | IMC Tweak | Well, green looks better than blue, but
it makes the PCDRIVE go high, which means
its starting to saturate the EOM drive. So |
|
11539
|
Fri Aug 28 20:15:49 2015 |
rana | Update | IOO | MC2 -> MCL Actuator TF |
|
|
11541
|
Sat Aug 29 04:53:24 2015 |
Ignacio | Update | IOO | MCL Wiener Feedforward Final Results | After fighting
relentlessly with the mode cleaner, I believe
I have achieved |
6x |
11542
|
Sun Aug 30 00:03:13 2015 |
rana | Update | IOO | MCL Wiener Feedforward Final Results | Somehow it seems like the ELOG makes all
of the thumbnails way too big by default.
Did we get some sneaky upgrade recently? |
|
11543
|
Sun Aug 30 10:57:29 2015 |
Ignacio | Update | IOO | MCL Wiener Feedforward Final Results | Big thumbnails? Could it have been this? elog:11498.
Anyways, I fixed the plots and |
|
11544
|
Sun Aug 30 12:20:08 2015 |
ericq | Update | IOO | MCL Wiener Feedforward Final Results |
|
|
11545
|
Sun Aug 30 13:31:48 2015 |
rana | Update | IOO | MCL Wiener Feedforward Final Results | I'm not totally sure, but by eyeball,
this seems like the best online MCL reduction
we've ever had. Nice work. |
|
11546
|
Sun Aug 30 13:55:09 2015 |
Ignacio | Update | IOO | Summary pages MCF | The summary
pages show the effect of the MCL FF on MCF
(left Aug 26, right Aug 30): |
 |
11547
|
Sun Aug 30 23:47:02 2015 |
Ignacio | Update | IOO | MISO Wiener Filtering of MCL | I decided
to give MISO Wiener filtering a try again.
This time around I managed to get working |
6x |
11548
|
Mon Aug 31 07:49:11 2015 |
ericq | Update | IOO | MC2 -> MCL Actuator TF |
|
|
11549
|
Mon Aug 31 09:36:05 2015 |
Ignacio | Update | IOO | MISO Wiener Filtering of MCL | MISO Wiener filters for MCL kept the mode
cleaner locked for a good 8+ hours.
|
|
11550
|
Mon Aug 31 14:15:23 2015 |
Ignacio | Update | IOO | Measured the MC_F whitening poles/zeroes | I measured the 15 Hz zero and the 150 Hz
pole for the whitening filter channels of
the Generic Pentek board in the IOO rack. |
 |
11553
|
Tue Sep 1 10:26:24 2015 |
Ignacio | Update | IOO | More MCL Subtractions (Post FF) | Using the
training data that was collected during the
MISO MCL FF. I decided to look at more MCL |
    |
11555
|
Tue Sep 1 11:56:56 2015 |
ericq | Update | IOO | IMC loop shapes | I took some transfer functions of the IMC
loop and crossover, being careful that the
PC drive never exceeding 1V during the measurements. |
 |
11558
|
Wed Sep 2 01:31:22 2015 |
ericq | Update | IOO | IMC loop shapes | The promised historical comparisons follow.
The crossover looks mostly the same
as before. There is a new feature in the |
 |
11561
|
Thu Sep 3 00:14:09 2015 |
rana | Configuration | IOO | IMC fast gain change for lock acq | The IMC often was making that scratchy
noise when first catching lock and sometimes
breaking. Thinking of the crappy crossover |
|
11563
|
Thu Sep 3 00:45:25 2015 |
Ignacio | Update | IOO | Remeasured MC2 to MCL TF + Improved subtraction performance | Today, I
remeasured the transfer function for MC2
to MCL in order to improve the subtraction |
8x |
11576
|
Fri Sep 4 10:25:19 2015 |
Steve | Configuration | IOO | AOM stage is ready | New
stage can hold the correct polarization.
DRAWING |
 |
11581
|
Mon Sep 7 18:25:16 2015 |
rana | Configuration | IOO | AOM stage is ready | The new stage missed the right height by
~2 mm. |
|
11583
|
Tue Sep 8 20:30:44 2015 |
rana | Update | IOO | MC WFS relief re-commissioned | I converted our MC WFS relief from CSH
to BASH today. I also added 'wait'
commands and 'echo' commands so that |
|
11584
|
Wed Sep 9 11:00:49 2015 |
Ignacio | Update | IOO | Last Wiener MCL subtractions | On Thursday
night (sorry for the late elog) I decided
to give the MCL FF one more try. |
11x |
11590
|
Thu Sep 10 09:37:34 2015 |
Ignacio | Summary | IOO | Filters left on MCL static module | The following MCL filters
were left loaded in the T240-X and T240-Y |
|
11592
|
Sun Sep 13 13:26:00 2015 |
rana | Update | IOO | Last Wiener MCL subtractions | When making the Wiener filter OFF/ON comparisons,
we want to use the median PSD estimates,
not the mean (which is what pwelch gives |
|
11595
|
Mon Sep 14 21:42:00 2015 |
rana | Update | IOO | MC Wiener + Summary | I turned on the MCF FF in the OAF today
(we need to fix the labeling of the 'ON'
buttons on the RHS of the screen). The performance |
|
11634
|
Tue Sep 22 16:42:39 2015 |
ericq | Update | IOO | Housekeeping | I've moved the OAF MC2 signal path
to go directly from c1oaf to c1mcs, so that
the LSC being ON/OFF doesn't interfere |
|
11682
|
Fri Oct 9 16:43:50 2015 |
ericq | Update | IOO | Weird IMC behavior | A few minutes ago, Gautam and I were poking
around the IOO rack, looking at where he
should power his frequency divider box, and |
|
11713
|
Mon Oct 26 18:10:38 2015 |
Ignacio | Update | IOO | Last Wiener MCL subtractions | As per Eric's request, here is the
code and TF measurement that was used to
calculate the MC2 FF filter that is loaded |
|
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.
|
|
11759
|
Thu Nov 12 16:00:55 2015 |
ericq | Update | IOO | PSL Laser turned back on | We found the PSL laser switched off. Looking
at the wall StripTool, it looks like this
happened about 4 hours ago. Gautam was working |
|
11773
|
Tue Nov 17 15:49:23 2015 |
Koji | Configuration | IOO | MC Autolocker modified | /opt/rtcds/caltech/c1/scripts/MC/AutoLockMC.csh
was modified last night.
1. Autolocker sometimes forget |
|
11794
|
Sat Nov 21 00:45:30 2015 |
Koji | Update | IOO | IMC fix | Based on the observation of the PMC error
signal, I started measuring the IMC OLTF.
Immediately, it |
   |
11795
|
Sat Nov 21 00:46:33 2015 |
Koji | Update | IOO | IMC OLTF | Here is the comparison before and after
the fix.
Before the work, the UGF was ~40kHz. |
 |
11796
|
Sun Nov 22 07:09:01 2015 |
rana | Update | IOO | IMC fix | On the demod board there is a 10 dB attenuator
(AT1), which lowers the level to -10 dBm
before the ERA-5. Then it should be 10 dBm |
|
11797
|
Sun Nov 22 12:07:09 2015 |
Koji | Update | IOO | IMC fix | TO DO
Done (Nov 23, 2015) -
Check if the attenuator is still there in |
|
11798
|
Sun Nov 22 12:12:17 2015 |
Koji | Update | IOO | IMC OLTF | Well. I thought a bit more and now I think
it is likely that this is just the servo
bump as you can see in the closed-loop TF. |
|
11802
|
Mon Nov 23 22:12:10 2015 |
Koji | Update | IOO | LO level check for the IMC demod board | In order to check the proper LO level,
the IMC demod board was checked. As
a short summary, -8dBm is the proper input |
 |
11807
|
Wed Nov 25 04:24:21 2015 |
rana | Update | IOO | LO level check for the IMC demod board | Hmmm. Very non-standard demod. From the
photo, looks like someone did some surgery
with the attenuators (AT1, AT2, AT3) in the |
|
11808
|
Wed Nov 25 10:07:10 2015 |
Koji | Update | IOO | LO level check for the IMC demod board | I didn't finish making the DCC entry
for this module yet.
But the attenuators are |
|
11811
|
Wed Nov 25 16:46:10 2015 |
Koji | Update | IOO | LO level check for the IMC demod board | Awwww. I found that the demod board has
the power splitter (PSCJ-2-1) with one output
unterminated. |
|
11812
|
Wed Nov 25 20:07:35 2015 |
rana | Update | IOO | LO level check for the IMC demod board | Perhaps we can replace T1 with a mini-circuits
hybrid 0-90 deg splitter and then remove
the trim caps. (JSPQ-80, JYPQ-30, SCPQ-50) |
|
11885
|
Wed Dec 16 10:22:14 2015 |
Steve | Update | IOO | this morning | c1sus and c1ioo were restarted. PMC locked.
|
|
11896
|
Tue Dec 22 16:23:33 2015 |
gautam | Update | IOO | Input alignment to PMC tweaked | When I came in this afternoon, I saw that
the PZT voltage to the PMC had railed. Following
the usual procedure of turning the servo |
|
11998
|
Thu Feb 18 02:52:27 2016 |
ericq | Update | IOO | Some housekeeping | I manually aligned the IMC. Spot positions
are all < 1.5mm. PMC trans of ~0.74, MC2
Trans of ~15400, MC Refl ~0.4, which is better |
|
12021
|
Fri Mar 4 13:52:41 2016 |
ericq | Update | IOO | PSL Laser Opened | PSL Table doors were open, and the laser
shutter was closed.
Doors have been closed, laser has |
|