| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
3040
|
Wed Jun 2 22:25:39 2010 |
Kevin | Update | PSL | Low Power 2W Beam Profile | Koji is worried about thermal lensing introducing
errors to the measurement of the 2W beam
profile so I measured the profile at a lower |
|
|
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 |
|
|
14129
|
Fri Aug 3 15:53:25 2018 |
gautam | Update | SUS | Low noise bias path idea | Summary:
The idea we are going with to push
the coil driver noise contribution down is |
|
|
14130
|
Fri Aug 3 16:27:40 2018 |
rana | Update | SUS | Low noise bias path idea | Bah! Too complex. |
|
|
11226
|
Mon Apr 20 16:18:29 2015 |
Jenne | Update | Electronics | Low noise pre-amps: returned | The Rai box was in the Cryo lab, and the
Busby box was in the TCS lab. Neither
had been signed out. Lame. Anyhow, |
|
|
11228
|
Mon Apr 20 21:26:46 2015 |
rana | Update | Electronics | Low noise pre-amps: returned | +1 to both Evan and Zach for prompt info
and +2 to you for getting more stuff than
you started looking for. -2 karma to |
|
|
11225
|
Sun Apr 19 15:03:26 2015 |
Jenne | Update | Electronics | Low noise pre-amps? | Does anyone know where the Busby
or Rai low noise pre-amp boxes are?
|
|
|
4456
|
Tue Mar 29 15:01:58 2011 |
Larisa Thorne | Update | Electronics | Low pass filter for X arm laser temperature control | This is the continuation of http://nodus.ligo.caltech.edu:8080/40m/4402
|
|
|
4457
|
Tue Mar 29 15:50:21 2011 |
Koji | Update | Electronics | Low pass filter for X arm laser temperature control | For bode plot:
USE LOG-LOG plot for the amplitude |
|
|
4531
|
Fri Apr 15 13:40:00 2011 |
Larisa Thorne | Update | Electronics | Low pass filter for X arm laser temperature control, second try | Plotting the data points yielded by the
spec analyzer of my first LPF yielded a result
that was not expected: the desired cutoff |
|
|
14068
|
Fri Jul 13 18:01:13 2018 |
gautam | Update | General | Low power MC | After getting the go ahead from Steve,
I removed the physical beam block on the
PSL table, sent the beam into the IFO, and |
|
|
1346
|
Mon Mar 2 21:16:32 2009 |
Yoichi | Update | Locking | Low-gain High-gain PD switching may not be working well | Osamu, Yoichi
This afternoon, I run the locking script |
|
|
1350
|
Tue Mar 3 19:26:44 2009 |
Yoichi | Update | Locking | Low-gain High-gain PD switching may not be working well | I checked the switching of the QPDX from high
gain to low gain.
Switching happens as expected, but the low |
|
|
1351
|
Tue Mar 3 23:59:26 2009 |
Yoichi | Update | Locking | Low-gain High-gain PD switching may not be working well | [quote]I checked the switching of the QPDX
from high gain to low gain.
Switching happens as expected, but the low |
|
|
1352
|
Wed Mar 4 03:37:51 2009 |
Yoichi | Update | Locking | Low-gain High-gain PD switching may not be working well | [quote]
This sounds like the QPD whitening gain sliders
may be stuck. The slider twiddling script |
|
|
13424
|
Fri Nov 10 13:46:26 2017 |
Steve | Update | PEM | M3.1 local earthquake | BOOM
SHAKA-LAKA |
|
|
15580
|
Sat Sep 19 01:49:52 2020 |
Koji | Update | General | M4.5 EQ in LA | M4.5 EQ in LA 2020-09-19 06:38:46 (UTC)
/ -1d 23:38:46 (PDT) https://earthquake.usgs.gov/earthquakes/eventpage/ci38695658/executive
I only checked the watchdogs. All |
|
|
15581
|
Sat Sep 19 11:27:04 2020 |
rana | Update | General | M4.5 EQ in LA | the seismometers obviously saturated during
the EQ, but the accelerometers captured some
of it. It looks like there's different |
|
|
15583
|
Sat Sep 19 18:08:34 2020 |
rana | Update | General | M4.5 EQ in LA | the EQ was ~14 km south of Caltech and
17 km deep
|
|
|
14755
|
Fri Jul 12 07:37:48 2019 |
gautam | Update | SUS | M4.9 EQ in Ridgecrest | All suspension watchdogs were tripped ~90mins
ago. I restored the damping. IMC is locked. |
|
|
13739
|
Mon Apr 9 08:39:39 2018 |
Steve | Update | PEM | M5.3 eq Souther CA | Earth quake M5.3 2018-04-05
19:29:16UTC |
|
|
13302
|
Fri Sep 8 07:54:04 2017 |
Steve | Update | PEM | M8.1 eq | Nothing tripped. No obvious damage. |
|
|
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 |
|
|
320
|
Fri Feb 15 22:16:04 2008 |
Andrey | Update | Computers | MATLAB is not working: "Licence checkout failed" |
For some unknown to me reason,
|
|
|
15207
|
Tue Feb 11 19:11:35 2020 |
shruti | Update | Computer Scripts / Programs | MATLAB on donatella | Tried to open MATLAB on Donatella and found
the error:
MATLAB is selecting |
|
|
6294
|
Sat Feb 18 12:23:09 2012 |
Den | Update | IOO | MC | When I came to the 40m this afternoon,
the MC was unlocked. Here is the trend of
MC_F for last 2 hours |
|
|
8343
|
Mon Mar 25 23:17:11 2013 |
rana | Summary | IOO | MC | I measured the dark noise and regular intensity
noise in MC trans tonight to get some estimate
for the free running spectrum that the Chas |
|
|
9211
|
Sun Oct 6 23:50:14 2013 |
rana | Configuration | SUS | MC filters adjusted |
Found the low pass filters OFF
in a couple of the MC SUS damping loops.
This allows injection of OSEM noise all the |
|
|
9697
|
Thu Mar 6 09:47:11 2014 |
Steve | Update | IOO | MC trend of 20 days |
|
|
|
10225
|
Thu Jul 17 01:24:35 2014 |
rana | Update | IOO | MC / EOM Stability Mystery Solved! | MC loop is near
unstable. Common gain reduced. Needs more |
|
|
5167
|
Wed Aug 10 11:22:55 2011 |
Suresh | Update | IOO | MC A2L alignment | [Kiwamu, Suresh]
We attempted to minimise the A2L
coupling in the MC mirrors (centering the |
|
|
9205
|
Sun Oct 6 17:05:49 2013 |
rana | Summary | IOO | MC ASC problems | MC unlocked over the weekend and also got
severely mis-aligned. It all started around
midnight on Saturday. |
|
|
7289
|
Mon Aug 27 18:59:24 2012 |
jamie | Update | IOO | MC ASC screen was confusing - Jenne is not stupid |
|
|
|
357
|
Tue Mar 4 20:14:02 2008 |
rana | Configuration | IOO | MC Alignment | The MC alignment was pretty far off. We were
getting TEM01 mode locks only.
Rather than inspect what happened I just |
|
|
1166
|
Tue Dec 2 17:56:56 2008 |
Alberto, Rana | Configuration | PSL | MC Alignment | In the attempt to maximize the Mode Cleaner
transmission and minimize the reflection
from the steering mirrors of the MC periscope, |
|
|
1169
|
Wed Dec 3 11:58:10 2008 |
Alberto | Update | PSL | MC Alignment | Rana, Alberto,
more details on the MC alignment we did yesterday.
|
|
|
1774
|
Wed Jul 22 10:49:40 2009 |
Alberto | Update | PSL | MC Alignment Trend | Trying to track the MC positions back for
a few days, it seems that the data hasn't
been recorded properly for a while. Something |
|
|
12691
|
Thu Dec 29 21:48:32 2016 |
rana | Update | IOO | MC AutoLocker hung because c1iool0 asleep again | MC unlocked, Autolocker waiting for c1iool0
EPICS channels to respond. c1iool0 was responding
to ping, but not to telnet. Keyed the crate |
|
|
12818
|
Fri Feb 10 13:04:32 2017 |
rana | Update | IOO | MC AutoLocker hung because c1iool0 asleep again | c1iool0 was down again. Rather than key
the crate, this time I just pushed the reset
button on the front and it came back. |
|
|
3345
|
Sun Aug 1 21:04:45 2010 |
rana | Summary | Computer Scripts / Programs | MC Autolocker fixed | Someone had left a typo in the MC autolocker
script recently while trying to set the lock
threshold to 0.09. As a result, the autlocker |
|
|
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 |
|
|
10116
|
Tue Jul 1 13:57:33 2014 |
ericq | Update | Computer Scripts / Programs | MC Autolocker on Megatron | Just a quick update on the status
of the auto locker:
The auto locker now runs and respawns |
|
|
7264
|
Thu Aug 23 22:41:04 2012 |
Koji | Update | IOO | MC Autolocker update | [Koji Rana]
MC Autolocker was updated. (i.e.
mcup and mcdown were updated) |
|
|
10940
|
Mon Jan 26 17:43:52 2015 |
ericq | Configuration | IOO | MC Autolocker update | The MC autolocker hasn't been
so snappy recently, and has been especially fussy
today. Previously, the mcup script was triggered |
|
|
10039
|
Sat Jun 14 18:43:15 2014 |
rana | Update | IOO | MC Autolocker upgrades | Somehow the caget/caput commands
are really slow. I'm not sure if this is
new behavior or not, but after changing values, |
|
|
577
|
Thu Jun 26 18:29:44 2008 |
Jenne | Update | | MC Back online | Jenne, Rob, Yoichi
I was playing with the Mode Cleaner earlier |
|
|
496
|
Sun May 25 19:33:16 2008 |
rana | Update | IOO | MC Bad after Re-alignment | The MC pointing was off and the transmitted
power was down after John and Andrey brought
it back after the bootfest.
|
|
|
1345
|
Mon Mar 2 16:27:40 2009 |
Alberto | Configuration | Electronics | MC Drum Mode SR560 Preamplifier Replaced | Today I checked out the SR560 around the
lab. I confirmed that the one with the label
"channel A noisy" is effectively |
|
|
1814
|
Thu Jul 30 21:26:16 2009 |
rana | Update | IOO | MC Drumhead mode | I used COMSOL 3.5a to do a FEA of one of the
MC flat mirrors. Should be close to the same
for all the mirrors.
|
|
|
1322
|
Wed Feb 18 21:10:21 2009 |
rana | Update | IOO | MC Drumhead mode lost again | In early December, Caryn and I noticed that
the MC Drumhead mode was visible at the Qmon
point of
|
|