ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
6195
|
Fri Jan 13 00:51:40 2012 |
Leo Singer | Update | Stewart platform | Frequency-dependent requirements for Stewart platform | Below are revised design parameters for
the Stewart platform based on ground motion
measurements. |
|
|
6196
|
Fri Jan 13 16:16:05 2012 |
Leo Singer | Update | Stewart platform | Flexure type for leg joints | I had been thinking of using this
flexure for the bearings for the
leg joints, but I finally realized that it |
|
|
6197
|
Fri Jan 13 17:40:38 2012 |
Zach | Update | RF System | foam box and temp controller taken off of PSL table | I stole the foam EOM box and the temperature
controller circuit from the PSL table so
that I could continue with the RAM measurements |
|
|
6198
|
Sat Jan 14 00:50:08 2012 |
rana, koji | Configuration | IOO | Towards coating thermal noise measurement with RefCav / MC beat | Koji asked aloud tonight if we could |
|
|
6199
|
Sun Jan 15 10:28:02 2012 |
Den | Update | Adaptive Filtering | delays | We can account for delays in the oaf system
by compensating it in the adaptive path of
the filter. But using only this procedure |
|
|
6200
|
Sun Jan 15 11:40:30 2012 |
Den | Update | Adaptive Filtering | downsampling | Here for the downsampling process we use
a low-pass Bessel digital filter of order
6, normalized cut-off frequency = 0.1. In |
|
|
6201
|
Sun Jan 15 12:18:00 2012 |
Den | Update | Adaptive Filtering | running time | In order to figure out what downsampling
ratio we can take, we need to determine the
running time of the fxlms_filter() function. |
|
|
6202
|
Tue Jan 17 01:02:07 2012 |
kiwamu | Update | LSC | glitch hunting in REFL RFPDs : strange | A very
strange thing is going on. |
|
|
6203
|
Tue Jan 17 02:27:49 2012 |
kiwamu | Update | LSC | fringe tests : all the suspensions are innocent | I did a quick test to check a hypothesis
that PRM is interfering with some other optics
in the single bounce configuration. |
|
|
6204
|
Tue Jan 17 02:44:59 2012 |
kiwamu | Update | CDS | awg not working | AWG
is not working. This needs to be fixed.
|
|
|
6205
|
Tue Jan 17 03:10:27 2012 |
kiwamu | Configuration | IOO | rotated lambda/2 plate | I have slightly rotated the lambda/2 plate,
which is used for attenuating the REFL beam's
power on the AS table |
|
|
6206
|
Tue Jan 17 13:47:40 2012 |
kiwamu | Update | LSC | dirty steering mirror in the REFL path | Last
night I found that there were many dust particles
on the second steering mirror in the REFL |
|
|
6207
|
Tue Jan 17 16:09:20 2012 |
kiwamu | Update | CDS | awg not working on the c1sus machine | Actually awg works fine without any
problems when the excitation channels belong
to the c1lsc machine. |
|
|
6208
|
Tue Jan 17 19:07:47 2012 |
rana | Update | LSC | glitch hunting in REFL RFPDs : strange | Another possibility is that there
is some beam clipping of the REFL beam before
it gets to the PD. Then there could be a |
|
|
6209
|
Wed Jan 18 12:36:26 2012 |
kiwamu | Update | LSC | wiped a steering mirror on the REFL path | I
wiped both surfaces of the REFL second steering
mirror. |
|
|
6210
|
Wed Jan 18 12:38:44 2012 |
steve | Update | PEM | Acrylic plexiglass transmittance | |
|
|
6211
|
Wed Jan 18 14:28:36 2012 |
kiwamu | Update | LSC | estimation of optical length between PRM and scattering object | Assuming
that PRM is interfering with some other optics,
I have estimated the optical distance between |
|
|
6212
|
Wed Jan 18 16:31:10 2012 |
kiwamu | Update | LSC | estimation of optical length between PRM and scattering object | I
searched for a scattering body in the REFL
path. |
|
|
6213
|
Thu Jan 19 23:34:52 2012 |
kiwamu | Update | IOO | PMC realignment and HEPA | I realigned the incident beam to PMC at
23:30. The transmitted light went up from
0.78 to 0.83. |
|
|
6214
|
Fri Jan 20 15:59:02 2012 |
kiwamu | Update | Green Locking | Y arm ALS noige budget | One of
my goals in this week is : measurement of |
|
|
6215
|
Fri Jan 20 16:24:50 2012 |
kiwamu | Update | Green Locking | Y arm ALS : time series | Here is
a new time series plot showing how stably |
|
|
6216
|
Fri Jan 20 17:05:59 2012 |
rana | Update | Green Locking | Y arm ALS : time series |
|
|
|
6217
|
Mon Jan 23 15:43:47 2012 |
Jenne | Update | IOO | PMC realignment |
|
|
|
6218
|
Mon Jan 23 23:12:00 2012 |
kiwamu | Update | IOO | PMC realignment | I have realigned the beam pointing to PMC.
The transmitted light increased from 0.74
to 0.83. |
|
|
6219
|
Tue Jan 24 13:36:05 2012 |
Zach | Bureaucracy | General | If I'm Peter Pan... | |
|
|
6220
|
Tue Jan 24 18:11:13 2012 |
kiwamu | Update | Green Locking | Y arm ALS noise budget | I
did some more stuff for the Y arm ALS and
updated the noise budget: |
|
|
6221
|
Wed Jan 25 02:59:46 2012 |
kiwamu | Update | Green Locking | Y arm ALS noise budget | Surprisingly
increasing the gain of the whitening filter
didn't improve the noise curve. |
|
|
6222
|
Wed Jan 25 15:04:41 2012 |
Jenne | Bureaucracy | SAFETY | 40m SOS supplies moved off of cleanroom flow bench | Bob, Callum and Daphen noted that our keeping
a JDSU HeNe (max power <4mW) is against
somebody's SOP. So I cleared everything |
|
|
6223
|
Wed Jan 25 17:32:03 2012 |
steve | Update | Green Locking | geen pointing into y arm is misaligned | I placed an other Y2-LW-1-2050-UV-45P/AR
steering mirror into the beam path of the
green beam launching in order to avoid the |
|
|
6224
|
Thu Jan 26 05:40:10 2012 |
kiwamu | Update | LSC | glitch in the analog demodulated signals | Indeed
the glitches show up in the analog demodulated
signals. So it is not an issue of the digital |
|
|
6225
|
Thu Jan 26 06:09:52 2012 |
kiwamu | Update | Green Locking | noisy AS55 | During
the Y arm ALS I found that the noise of the
AS55 demod signal was worse than that of |
|
|
6226
|
Thu Jan 26 08:36:38 2012 |
steve | Update | SAFETY | evacuation drill | It started with fire alarm test yesterday
at 14:50 All alarms are functioning
VERY loud and their flashers are bright. |
|
|
6227
|
Thu Jan 26 10:17:01 2012 |
steve | Update | Green Locking | geen pointing into y arm is realigned |
|
|
|
6228
|
Thu Jan 26 15:35:23 2012 |
Jenne | Update | IOO | MC ~1Hz badness | The mode cleaner is super unhappy.
It's rocking around at ~1Hz.
I turned off the WFS and turned them |
|
|
6229
|
Thu Jan 26 19:28:02 2012 |
kiwamu | Update | IOO | PMC low transmission | After I recovered the lock of PMC, I found
that the PMC transmission was quite low.
It was about 0.26 in the EPICS display. |
|
|
6230
|
Fri Jan 27 05:21:43 2012 |
kiwamu | Update | Green Locking | fine alignment of the Y end green setup | I did a fine alignment on the Y end green
setup. The green light became able to be
locked again. |
|
|
6231
|
Fri Jan 27 06:07:47 2012 |
kiwamu | Update | LSC | glitch hunting | I went through various
IFO configurations to see if there are glitches |
|
|
6232
|
Fri Jan 27 09:05:41 2012 |
steve | Update | SUS | OSEM locking plunger |
|
|
|
6233
|
Fri Jan 27 13:13:03 2012 |
Jenne | Update | SUS | ITMs tripped | Sitting down to start cavity measurements,
I found both ITMs tripped. It must
have happened a while ago (I didn't bother |
|
|
6234
|
Fri Jan 27 16:55:28 2012 |
Jenne | Update | Green Locking | Y-green realigned | The Yarm green laser really wanted to lock
on a 01/10 mode, so Kiwamu suggested I go
inside and realign the green beam to the |
|
|
6235
|
Fri Jan 27 17:16:05 2012 |
kiwamu | Update | LSC | hypothetical glitch scenario | Here is a hypothetical scenario which
could make the glitches in the LSC error
signals. It can be considered as a |
|
|
6236
|
Mon Jan 30 08:17:06 2012 |
steve | Update | IOO | PMC |
|
|
|
6237
|
Mon Jan 30 16:18:51 2012 |
steve | Update | PEM | Roscolux colored film transmittance at 1064 nm |
Roscolux filter films
#74 night blue, 0.003" thick |
|
|
6238
|
Mon Jan 30 23:10:02 2012 |
kiwamu | Update | SUS | drift mon script needs to be fixed | [Rana / Kiwamu]
We tried to set some parameters for
the suspension drift monitor but the old |
|
|
6239
|
Tue Jan 31 08:44:10 2012 |
steve | Update | IOO | laser shuts down |
The 2W Innilight shutdown shut
when I opened side door for safety scan. |
|
|
6240
|
Tue Jan 31 14:58:30 2012 |
kiwamu | Update | IOO | laser shuts down | [Steve/ Kiwamu]
We found that the laser had
completely shut off for ~ 4 hours even with |
|
|
6241
|
Tue Jan 31 17:13:49 2012 |
steve | Update | IOO | only the PSL laser is off |
The 2W PSL laser is turned off.
|
|
|
6242
|
Wed Feb 1 17:00:57 2012 |
steve | Update | IOO | laser is back ON |
|
|
|
6243
|
Fri Feb 3 10:48:24 2012 |
Den | Update | Computers | c1lsc kernel | This morning I killed again c1lsc kernel
with the new realization of fxlms algorithm.
It works fine with gcc compiler during the |
|
|
6244
|
Fri Feb 3 14:44:33 2012 |
Jenne | Update | IOO | MC SUS misalignment | The mode cleaner is a little misaligned
in pitch, and is very misaligned in yaw.
The lowest order mode that is flashing is |
|