ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
11524
|
Sat Aug 22 15:48:32 2015 |
Koji | Summary | LSC | Arm locking recovery | As per Ignacio's request, I restored
the arm locking.
- MC WFS relief |
|
11525
|
Mon Aug 24 14:05:47 2015 |
ericq | Update | SUS | EricG Investigating L2A | This afternoon, I showed Eric Gustafson
some of the basics of making swept sine measurements
with DTT. We turned off the f2a filters and |
|
11526
|
Mon Aug 24 16:10:07 2015 |
ericq | Update | SUS | ETMY Oplev laser power is falling | Today I noticed the box around the ETMY
oplev sum flashing red, as it dipped below
1k. I don't recall seeing this recently, |
|
11527
|
Mon Aug 24 16:46:49 2015 |
ericq | Update | SUS | ETMY Oplev laser power is falling | Repeated for all optics, ETMY seems like
the only one sharply dropping for now (PRM
is all over the place and hard to gauge, |
|
11528
|
Tue Aug 25 04:15:51 2015 |
ericq | Update | LSC | PRFPMI is back | More PRFPMI locks tonight. Right now, it's
been locked for 22+ minutes, though with
the PRMI still on 3F signals. I think the |
|
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 |
 |
11530
|
Tue Aug 25 16:33:31 2015 |
Ignacio, Steve | Configuration | PEM | Seismometer enclosure copper foil progress | Steve ordered
about two weeks ago a roll of 0.5 mm thick
copper foil to be used for the inside of |
   |
11531
|
Tue Aug 25 16:39:06 2015 |
Steve | Update | safety | safety training | Alessandra Marrocchesi received 40m specific
basic safety training yesteday. |
|
11532
|
Thu Aug 27 01:41:41 2015 |
Ignacio | Update | IOO | Triply Improved SISO (T240-X) FF of MCL | |
    |
11533
|
Thu Aug 27 02:09:14 2015 |
ericq | Update | LSC | AUX X Laser Current Changed | I spent some time tonight chasing down
the cause of huge RIN in the X green PDH
transmitted light, which I had started seeing |
|
11534
|
Thu Aug 27 04:23:04 2015 |
ericq | Update | LSC | PRFPMI is back | Got to a 40 minute lock tonight. All other
locks broke because of me poking something.
I redid some sensing excitations, |
|
11535
|
Fri Aug 28 00:59:55 2015 |
Ignacio | Update | IOO | Final SISO FF Wiener Filter for MCL | This is my
final |
    |
11536
|
Fri Aug 28 02:20:35 2015 |
Ignacio | Update | LSC | PRFPMI and MCL FF | A day late
but here it is.
Eric |
 |
11537
|
Fri Aug 28 17:04:12 2015 |
Steve | Update | PEM | Gur interface box cable | Ara! Onara suru tsu-mori |
|
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 |
|
|
11540
|
Fri Aug 28 20:20:26 2015 |
rana | Update | PEM | Gur interface box cable | To help find out if Steve really melted
the inside of our precious seismometer, lets
hook it up using the handheld seismo wand |
|
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. |
 |
11551
|
Tue Sep 1 02:44:44 2015 |
Koji | Summary | CDS | c1oaf, c1mcs modified for the IMC angular FF | [Koji, Ignacio]
In order to allow us to work on
the IMC angular FF, we made the signal paths |
    |
11552
|
Tue Sep 1 06:58:11 2015 |
Ignacio | Update | WienerFiltering | MCL FF => WFS1 and WFS2 FF => ARMS FF | I took some
training data during Sunday night/Monday
morning while the MCL MISO FF was turned |
6x |
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 |
    |
11554
|
Tue Sep 1 10:36:06 2015 |
Steve | Update | PEM | Gurs swapped |
|
|
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. |
 |
11556
|
Tue Sep 1 17:07:06 2015 |
ericq | Update | LSC | IR beatnote confusion | There has been some discussion here and
there of using fiber coupled IR beats for
ALS. A few weeks ago, and again today with |
|
11557
|
Tue Sep 1 17:38:58 2015 |
ericq | Update | LSC | IR beatnote confusion |
|
|
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 |
 |
11559
|
Wed Sep 2 13:44:04 2015 |
ericq | Update | LSC | IR beatnote confusion | From
the AFW website about our product, the POBC-64-C-1-7-2-25dB:
port1 |
|
11560
|
Wed Sep 2 23:50:00 2015 |
rana | Update | PSL | PMC LO dying | Let's order a pair of 35.5 MHz Wenzel
for this guy and package like Rich has done
for the WB low noise oscillators. |
|
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 |
|
11562
|
Thu Sep 3 00:29:45 2015 |
rana | Update | ASC | ASS X not working | ran the ON script several times and it
kept pulling it away from good alignment,
even when TRX was > 0.9. |
|
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 |
11564
|
Thu Sep 3 02:12:08 2015 |
rana | Update | CDS | Simulink Webview updated | Back in 2011, JoeB wrote
some entries on how to automatically
update the Simulink webview stuff. |
|
11565
|
Thu Sep 3 02:30:46 2015 |
rana | Update | CDS | c1cal time reduced by deleting LSC sensing matrix | I experimented with removing somethings
here and there to reduce the c1cal runtime.
Eventually I deleted the LSC Sensing Matrix |
|
11566
|
Thu Sep 3 08:53:55 2015 |
Steve | Update | SUS | ETMY Oplev laser power is falling | Rana, Steve
We investigated the ETMY oplev |
|
11567
|
Thu Sep 3 13:25:40 2015 |
rana | Update | CDS | Simulink Webview updated | added the cron script for this to megatron
to run at 8:44 AM each morning. Here's
the new MegaCron attached :-()- |
|
11568
|
Thu Sep 3 17:15:26 2015 |
ericq | Update | LSC | IR beatnote confusion | I was thinking that the "FOSC"
product line (which is called a "coupler"
instead of a "splitter/combiner") |
|
11569
|
Thu Sep 3 19:52:24 2015 |
rana | Summary | SUS | SUS drift monitor | Since Andrey's SUS Drift mon screen
back in 2007, we've had several versions
which used different schemes and programming |
|
11570
|
Fri Sep 4 00:58:29 2015 |
rana | Update | CDS | soldering the Generic Pentek interface board | Q and Ignacio were taking a second look
at the Pentek interface board which we're
using to acquire the POP QPD, ALS trans, |
|
11571
|
Fri Sep 4 04:05:51 2015 |
ericq | Update | LSC | DRMI locked on 1F and 3F | Thanks to some expertly timed coffee from
Ignacio, I have been able to achieve indefnite
locks of the DRMI, first on a 1F/3F |
|
11572
|
Fri Sep 4 04:12:05 2015 |
ericq | Update | Computer Scripts / Programs | MATLAB down on all workstations | There seems to be something funny going
on with MATLAB's license authentication
on the control room workstations. Earlier |
|
11573
|
Fri Sep 4 08:00:49 2015 |
Ignacio | Update | CDS | RC low pass circuit (1s stage) of Pentek board | Here is the
transfer function and cutoff frequency (pole)
of the first stage low pass circuit of the |
 |