| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
11574
|
Fri Sep 4 09:23:32 2015 |
Ignacio | Update | CDS | Modified Pentek schematic | Attached is the modifed Pentek whitening
board schematic. It includes the yet to be
installed 1nF capacitors and comments. |
|
|
11575
|
Fri Sep 4 09:36:48 2015 |
Steve | Update | LSC | IR beatnote confusion..... |
|
|
|
11576
|
Fri Sep 4 10:25:19 2015 |
Steve | Configuration | IOO | AOM stage is ready | New
stage can hold the correct polarization.
DRAWING |
|
|
11577
|
Fri Sep 4 15:20:31 2015 |
ericq | Update | LSC | Vertex Sensing | I've now made a collection of sensing
matrix measurements.
In all of the plots below, the |
|
|
11578
|
Fri Sep 4 20:06:23 2015 |
rana | Update | LSC | DRMI locked on 1F and 3F | Nice going. I think the LLO / LHO scheme
is to acquire on 1F and then cdsutils avg
to get the 3F offsets. The thinking is that |
|
|
11579
|
Fri Sep 4 20:42:14 2015 |
gautam, rana | Update | CDS | Checkout of the Wenzel dividers | Some years ago I bought some dividers from
Wenzel. For each arm, we have x256 and a
x64 divider. Wired in series, that means |
|
|
11580
|
Mon Sep 7 16:30:56 2015 |
rana | HowTo | Computer Scripts / Programs | increase of window border size on Rossa | Frustrated by the single pixel width of
the windows and how hard that makes it to
drag things around, I explored StackExchange: |
|
|
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. |
|
|
11582
|
Mon Sep 7 19:46:46 2015 |
rana | Update | PEM | Seismic BLRMS filters | As it turned out, the "STS" BLRMS
filters were all a mess, so I fixed them
up today: |
|
|
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 |
|
11585
|
Wed Sep 9 11:33:58 2015 |
rana | Update | Summary Pages | Summary Page updates |
Made most plots in IOO tab only
plot when MC_TRANS > 10000 using Eve's
MC_LOCK state definition.
added |
|
|
11587
|
Wed Sep 9 15:45:11 2015 |
ericq | Update | PEM | Inverted STS filters in C1OAF | Our online subtraction filters for PRC
angle and MC length were trained on
the raw ADC signals, so I've inverted |
|
|
11588
|
Thu Sep 10 01:09:20 2015 |
rana | Update | LSC | Moved LSC sensing matrix notch frequencies | We looked at the DRMI noise spectrum and
chose new excitation frequencies such that
the lines are lower in frequency than before |
|
|
11589
|
Thu Sep 10 04:23:00 2015 |
ericq | Update | LSC | Moved LSC sensing matrix notch frequencies | Frequencies are:
CARM:
309.21 Hz
DARM: 307.88 Hz
MICH: |
|
|
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 |
|
|
11591
|
Fri Sep 11 10:56:47 2015 |
Steve | Update | endtable upgrade | ETMY optical table feedthrough | The ETMY enclosure feedthrough - north
is installed. The sealing material is hard
to work with. |
|
|
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 |
|
|
11593
|
Mon Sep 14 10:41:03 2015 |
Steve | Update | VAC | TP2 dry pump replaced | TP2 dry fore pump sn PLE10082 was replaced
at pressure 717 mTorr, TP2 50K rpm
0.33A @ 112,677 hrs |
|
|
11594
|
Mon Sep 14 16:50:12 2015 |
ericq | Update | LSC | Quick note | Just a heads up while I'm out for a
bit: the delay line is currently installed
in the 55MHz modulation path. |
|
|
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 |
|
|
11596
|
Mon Sep 14 23:12:49 2015 |
ericq | Update | LSC | 55MHz modulation phase effect on PRMI | With the adjustable delay line box installed
in the 55MHz modulation path, I've
measured the PRMI sensing matrix as a function |
|
|
11597
|
Tue Sep 15 01:14:10 2015 |
rana | Summary | LSC | need to check LSC Whitening switch logic ... again | Tonight we noticed that the REFL_DC signal
has gone bipolar, even though the whitening
gain is 0 dB and the whitening filter is |
|
|
11598
|
Tue Sep 15 15:01:23 2015 |
rana | Summary | LSC | disabling the LSC AA filters + mod to whitening | While investigating the BIO situation with
the LSC machine and the iscaux2 processor
last night, we wondered if maybe the Anti-Aliasing |
|
|
11599
|
Tue Sep 15 15:10:48 2015 |
gautam, ericq, rana | Summary | LSC | PRFPMI lock & various to-do's | [SIZE=3]I was observing Eric while he was
attempting to lock the PRFPMI last night.
The handoff from ALS to LSC was not very |
|
|
11600
|
Tue Sep 15 16:49:08 2015 |
Steve | Update | endtable upgrade | ETMY optical table feedthrough | ETMY optical table enclosure feedthrough-
south is in. Now it is time to see how air
tightness increases performance. |
|
|
11601
|
Tue Sep 15 18:35:21 2015 |
ericq | Summary | LSC | some further notes | About the analog CARM control with ALS:
We're looking at using a Sigg
designed remotely switchable delay line box |
|
|
11603
|
Tue Sep 15 20:44:13 2015 |
gautam | Summary | LSC | Checking the delay line phase shifter DS050339 | I checked out the delay line phase shifter
[URL=https://dcc.ligo.org/public/0016/D050339/000/D050339-A.pdf]D050339[/URL],
([URL=https://dcc.ligo.org/public/0001/T050250/001/T050250-v1.pdf]theory |
|
|
11604
|
Wed Sep 16 03:37:06 2015 |
Koji | Summary | Green Locking | Workable delay line setup prepared | [Koji Gautam]
The variable delay line has been
setup for practical use. The hardware and |
6x |
|
11605
|
Wed Sep 16 03:44:18 2015 |
Koji | Update | LSC | RF micky mouse | 1. POP110 RF amps are powered from the
cross connect. But that +15V block has GND
connections that are not connected to the |
|
|
11606
|
Wed Sep 16 15:04:33 2015 |
ericq | Summary | LSC | DC PD Whitening Board Fixed |
|
|
|
11607
|
Wed Sep 16 23:07:06 2015 |
rana | Update | Electronics | LSC Whitening board: LP filters added, pictures taken | I added the 0.1 uF and 47 nF caps
that I mentioned so that we can now bypass
the AA filters for these channels. (mistakenly |
|
|
11608
|
Thu Sep 17 02:22:53 2015 |
Steve | Update | endtable upgrade | ETMY optical table feedthrough | I doubt we'll see any effect until
we carefully seal the holes. If there's
1 hole in your boat it still sinks. |
|
|
11609
|
Thu Sep 17 03:48:10 2015 |
ericq | Summary | LSC | some further notes | Something odd is happening with the CM
board. Measuring from either input to OUT1
(the "slow output") shows a nice |
|
|
11610
|
Thu Sep 17 08:36:14 2015 |
Steve | Update | PEM | earth quake | No damage. The BS sensor UR 0.220 V has
been low for some times.
Dataviewer does not work for long |
|
|
11611
|
Thu Sep 17 13:06:05 2015 |
ericq | Summary | LSC | Low input impedance on CM board | As it turns out, our version of the common
mode board does not have
high input impedence. I think this is what |
|
|
11612
|
Thu Sep 17 16:04:09 2015 |
Steve | Update | PEM | Gurs | ETMY - Guralp (B-MIT) was covered with
copper lined can yesterday afternoon. It's
long cable is connected to ADC interface |
|
|
11613
|
Thu Sep 17 17:27:01 2015 |
gautam | Update | LSC | RF micky mouse - dodgy DIN connector blocks fixed | [Steve, gautam]
We fixed the problematic DIN connectors
on 1Y2, by swapping out the 3 DIN connector |
|
|
11614
|
Thu Sep 17 19:42:43 2015 |
Koji | Update | LSC | RF micky mouse - dodgy DIN connector blocks fixed | 1.
The delay-line box is now hooked up to the
cross connect +15V supply. |
|
|
11615
|
Thu Sep 17 19:58:06 2015 |
gautam | Summary | Computer Scripts / Programs | Frequency counting algorithm | I made some changes to the c1tst model
running on c1iscey in order to test my algorithm
for frequency counting. I followed the steps |
|
|
11616
|
Fri Sep 18 08:03:53 2015 |
rana | Update | LSC | RF micky mouse - dodgy DIN connector blocks fixed | Steve and I turned on the box this morning
so that the IMC would lock again.
For future reference, remember |
|
|
11617
|
Fri Sep 18 08:04:09 2015 |
rana | Update | LSC | RF micky mouse - dodgy DIN connector blocks fixed | Steve and I turned on the box this morning
so that the IMC would lock again.
For future reference, remember |
|
|
11618
|
Fri Sep 18 09:06:26 2015 |
rana | Frogs | Computer Scripts / Programs | remote data access: volume 1, Inferno | Trying to download some data using matlab
today, I found that my ole mDV stuff doesn't
work because its MEX files were built for |
|
|
11619
|
Fri Sep 18 11:59:08 2015 |
ericq | Update | LSC | AUX X Laser Current Reverted | Once again, the transmitted X green beam
was showing enormous intensity fluctuations
(50x higher than normal). Last month, I reduced the |
|
|
11620
|
Fri Sep 18 13:33:17 2015 |
ericq | Update | LSC | Fast ALS troubles - Noise at 36kHz | To get around the problems between the
pomona LPF and low CM board input impedance,
I've placed the LPF at the CM board fast |
|
|
11621
|
Fri Sep 18 16:08:41 2015 |
ericq | Update | LSC | Fast ALS troubles - Noise at 36kHz | I looked at REFL11 and REFL55 during
PRMI lock - the line is there.
|
|
|
11622
|
Fri Sep 18 19:15:35 2015 |
rana | Update | LSC | Fast ALS troubles - Noise at 36kHz | One the Wiki (https://wiki-40m.ligo.caltech.edu/40mHomePage),
we have a Mech Resonance page for mechanical
frequencies and a PEM page where we want |
|
|
11623
|
Fri Sep 18 19:19:49 2015 |
rana | Frogs | Computer Scripts / Programs | remote data access: volume 1, Inferno | NDS2 restarted after hours long upgrade
process; testing has begun. Let's try
to get some long stretches of MC locked with |
|
|
11624
|
Mon Sep 21 00:51:36 2015 |
rana | Update | General | op340m, autoburt cron =? megatron | I modified the perl script which does our
hourly autoburt so that it can run on megatron
instead of op340m (old Solaris machine). |
|
|
11625
|
Mon Sep 21 11:12:14 2015 |
Steve | Update | VAC | cold cathode is flaky | CC4 cold cathode gauge jump triggered interlock
to close VM1 valve to protect the RGA.
The IFO pressure is 1e-5 Torr |
|