| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
60
|
Sun Nov 4 23:22:50 2007 |
waldman | Update | OMC | OMC PZT and driver response functions | I wrote a big long elog and then my browser
hung up, so you get a less detailed entry.
I used Pinkesh's calibration of the PZT |
7x |
|
61
|
Sun Nov 4 23:55:24 2007 |
rana | Update | IOO | Friday's In-Vac work | On Friday morning when closing up we noticed
that we could not get the MC to flash any
modes.
|
|
|
62
|
Mon Nov 5 07:29:35 2007 |
rana | Update | IOO | Friday's In-Vac work | Liyuan recently did some of his pencil beam
scatterometer measurements measuring not
the
|
|
|
63
|
Mon Nov 5 14:44:39 2007 |
waldman | Update | OMC | PZT response functions and De-whitening | The PZT has two control paths: a DC coupled
path with gain of 20, range of 0 to 300
V, and a pair of 1:10 whitening filters, |
|
|
68
|
Tue Nov 6 14:51:03 2007 |
tobin, rob | Update | IOO | Mode cleaner length | Using the Ward-Fricke variant* of the [url=http://ilog.ligo-wa.caltech.edu/ilog/pub/ilog.cgi?group=detector&date_to_view=02/14/2004&anchor_to_scroll_to=2004:02:15:00:06:50-daniel]Sigg-Frolov
method[/url], we found the length of the
mode cleaner to be [b]27.0934020183 meters[/b], |
|
|
69
|
Tue Nov 6 15:36:03 2007 |
rob | Update | LSC | XARM locked | Easily, after resetting the PSL Uniblitz shutters.
There's no entry from David or Andrey about
the recovery from last week's power outage, |
|
|
76
|
Wed Nov 7 09:38:01 2007 |
steve | Update | VAC | rga scan | pd65-m-d2 at cc1 6e-6 torr |
|
|
81
|
Wed Nov 7 16:07:03 2007 |
steve | Update | PSL | PSL & IOO trend | 1.5 days of happy psl-ioo with litle bumps
in C1:PSL-126MOPA_HTEMP |
|
|
82
|
Thu Nov 8 00:55:44 2007 |
pkp | Update | OMC | Suspension tests | [Sam , Pinkesh]
We tried to measure the transfer functions |
9x |
|
83
|
Thu Nov 8 11:40:21 2007 |
steve | Update | PEM | particle counts are up | I turned up the psl HEPA filter to 100%
This 4 days plot shows why |
|
|
87
|
Fri Nov 9 00:23:12 2007 |
pkp | Update | OMC | X and Z resonances | I got a couple of resonance plots going for
now. I am still having trouble getting the
Y measurement going for some reason. I will |
|
|
88
|
Fri Nov 9 09:37:55 2007 |
steve | Update | PSL | head temp hiccup | Just an other PSL-126MOPA_HTEMP hiccup.
The water chiller is at 20.00C |
|
|
93
|
Mon Nov 12 10:53:58 2007 |
pkp | Update | OMC | Vertical Transfer functions | [Norna Sam Pinkesh]
These plots were created by injected white |
|
|
96
|
Mon Nov 12 15:18:34 2007 |
rob | Update | PSL | ISS |
After John soldered a 3.7 MHz notch filter
onto the ISS board, I took a quick TF and |
|
|
97
|
Mon Nov 12 23:44:19 2007 |
John | Update | PSL | ISS | [quote]
After John soldered a 3.7 MHz notch filter
onto the ISS board, I took a quick TF and |
|
|
98
|
Tue Nov 13 14:33:40 2007 |
John | Update | PSL | ISS filter | The transfer function from 'In Loop Error
Point Monitor' to TP3 the filter out test
point on the ISS board.
|
|
|
101
|
Wed Nov 14 12:47:19 2007 |
tobin | Update | PSL | ISS | John, Tobin
With John's notch filter installed and the |
|
|
102
|
Wed Nov 14 16:54:54 2007 |
pkp | Update | OMC | Much better looking vertical transfer functions | [Norna Pinkesh]
So after Chub did his wonderful mini-surgery |
|
|
103
|
Wed Nov 14 17:50:00 2007 |
tobin | Update | PSL | ISS | Here's the current wiring between the ISS
and its PDs:
|
|
|
105
|
Thu Nov 15 17:09:37 2007 |
pkp | Update | OMC | Vertical Transfer functions with no cables attached. | [Norna Pinkesh]
The cables connecting all the electronics |
|
|
106
|
Thu Nov 15 18:06:06 2007 |
tobin | Update | Computers | alex: linux1 root file system hard disk's dying | I just noticed that Alex made [url=http://www.ldas-sw.ligo.caltech.edu/ilog/pub/ilog.cgi?group=40m&date_to_view=11/14/2007&anchor_to_scroll_to=2007:11:14:20:00:29-aivanov]an
entry in the old ilog[/url] yesterday, saying:
"[color=red][b]Looks like linux1 root filesystem |
|
|
109
|
Thu Nov 15 18:37:06 2007 |
tobin | Update | Computers | possible replacement for linux1's disk | It looks like the existing disk in linux1
is a Seagate ST380013A (this can be found
either via the smartctl utility or by looking |
|
|
110
|
Fri Nov 16 11:27:18 2007 |
tobin | Update | Computers | script fix | I added a tidbit of code to "LIGOio.pm" that
fixes a [url=http://lhocds.ligo-wa.caltech.edu:8000/40m/EZCA]problem
with ezcastep on Linux[/url]. Scripts such |
|
|
111
|
Fri Nov 16 14:11:26 2007 |
tobin | Update | Computers | op140 | Alan called to say that Phil Ehrens will be
coming by to take [b]op140[/b] off our hands. |
|
|
112
|
Fri Nov 16 14:31:43 2007 |
tobin | Update | Computers | op140 disks | Phil Ehrens stopped by and took op140's disks. |
|
|
117
|
Tue Nov 20 11:10:07 2007 |
tobin | Update | Computers | epics access from matlab | I installed "[url=http://www.slac.stanford.edu/~strauman/labca/]labca[/url]",
which allows [b]direct access to EPICS channels
from within Matlab[/b]. It comes with both |
|
|
121
|
Wed Nov 21 14:31:41 2007 |
rob | Update | PSL | FSS twiddle |
I `tweaked' the FSS path today. Here's what
I did:
|
|
|
127
|
Tue Nov 27 20:47:00 2007 |
tobin | Update | PSL | FSS | Rana, Tobin
We looked at the RF PD signal to the FSS |
|
|
128
|
Wed Nov 28 04:21:46 2007 |
rana | Update | PSL | FSS | [quote]Rana, Tobin
[SIZE=1]
We looked at the RF PD signal to the FSS |
|
|
134
|
Wed Nov 28 17:41:34 2007 |
rob | Update | PSL | FSS again | I investigated the FSS a bit more today.
I looked at the signals coming out of the
FSS frequency reference, and saw that both |
|
|
136
|
Wed Nov 28 19:44:18 2007 |
tobin | Update | PSL | HEPA | I found the HEPA turned off completely. I
turned it on. |
|
|
163
|
Tue Dec 4 23:16:35 2007 |
tobin | Update | PSL | ISS | I was confused to find that I could increase
the ISS gain slider all the way from 15dB
to 30dB without seeing much of any increase |
|
|
165
|
Wed Dec 5 13:49:08 2007 |
alberto | Update | Electronics | RF AM PD lines monitor | In the last weeks I’ve been working on the
design of an electronic board to measure
directly the power of the main spectral lines |
|
|
167
|
Wed Dec 5 17:49:57 2007 |
tobin | Update | PSL | ISS | Attached is a plot of the ISS RIN with a variety
of gain settings.
|
|
|
168
|
Wed Dec 5 18:08:36 2007 |
Andrey | Update | ASC | Optical Lever laser for ETMX is installed |
A new laser with \lambda=633nm has been intalled
and the mirror adjusted so that the signal |
|
|
169
|
Wed Dec 5 18:22:03 2007 |
tobin | Update | PSL | ISS dark noise | Attached is a plot of the dark noise spectrum
of the ISS photodiodes (1) before fooling
with them, (2) after replacing the 4151's |
|
|
171
|
Wed Dec 5 20:32:51 2007 |
tobin | Update | PSL | ISS dark noise | The ISS dark noise is not coming from the
PD heads; the spectrum is essentially unchanged
when the PD is unplugged from the ISS. Did |
|
|
177
|
Thu Dec 6 19:30:43 2007 |
tobin | Update | PSL | ISS dark noise - 60 Hz! | A higher resolution spectrum [attached] shows
that nearly all of the excess dark noise
on the ISS is in 60 Hz harmonics (with some |
|
|
181
|
Fri Dec 7 18:28:30 2007 |
tobin | Update | Computer Scripts / Programs | compiled matlab hoses itself | Andrey pointed out to me that some matlab
functions in the Signal Processing Toolbox
were dying with errors. Looking into the |
|
|
182
|
Fri Dec 7 18:31:30 2007 |
tobin | Update | Computer Scripts / Programs | compiled matlab hoses itself | Addendnum. The reason the linemon_mcr command
was in the path was because of the user issuing
the command "addpath(genpath(pwd))" where |
|
|
183
|
Fri Dec 7 19:14:30 2007 |
tobin | Update | PSL | ISS dark noise - ground loop enlightenment | My alleged 60 Hz harmonics were all from a
ground loop created by connecting the SR785
ground to the ISS circuit ground; they disappeared |
|
|
185
|
Mon Dec 10 18:42:20 2007 |
tobin | Update | PSL | ISS RIN script | I wrote a script to measure the ISS RIN.
The script uses the "labca" interface (described
in an [url=http://dziban.ligo.caltech.edu:40/40m/117]earlier |
|
|
192
|
Sun Dec 16 16:52:40 2007 |
dmass | Update | Computers | Computer on the end Fixed | I had Mike Pedraza look at the computer on
the end (tag c21256). It was running funny,
and turns out it was a bad HD.
|
|
|
193
|
Mon Dec 17 11:47:13 2007 |
alberto | Update | Electronics | an alternative design for the RFAM monitor's filter at 33Mhz | Since the Butterworth turned out o be rather
wide-band, I tried an other configuration
for the 33 MHz filter. Attached are the simulated |
|
|
195
|
Tue Dec 18 00:51:39 2007 |
Andrey | Update | Computer Scripts / Programs | Results of Saturday overnight measurements |
As I indicated in the previous e-log entry
(#194), I made overnight measurements in |
11x |
|
196
|
Tue Dec 18 16:50:35 2007 |
tobin | Update | SAFETY | uvex laser safety glasses defective | A few days ago we noticed what appeared to
be a blotched, speckled fracturing of the
coating of the "UVEX" laser safety glasses. |
|
|
197
|
Tue Dec 18 21:31:31 2007 |
tobin | Update | PSL | ISS RIN | My measurements of the ISS RIN via the SR785
and via the DAQ disagree considerably. The
spectral shapes are very similar, however, |
|
|
201
|
Wed Dec 19 15:51:00 2007 |
Andrey | Update | Computer Scripts / Programs | Daytime measurements in XARM and their results |
I was making measurements in XARM for three
different nights. All the results agree with |
11x |
|
203
|
Wed Dec 19 16:40:12 2007 |
steve | Update | SAFETY | laser safety glasses measured | I measured the coarse transission at 1064nm
of the 40m safety glasses today.
|
|
|
205
|
Thu Dec 20 02:04:09 2007 |
Andrey | Update | Computer Scripts / Programs | New overnight measurements in XARM and their results |
I ran in the daytime/evening time my program,
changing the damping gains in suspension |
11x |