| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
11223
|
Wed Apr 15 23:29:08 2015 |
Jenne | Update | Computer Scripts / Programs | CDSutils upgrade undone | Q remotely reverted this change.
Scripts seem to work again.
|
|
|
11224
|
Thu Apr 16 10:32:42 2015 |
Steve | Update | Optical Levers | oplevs monitoring | The IFO_overview of oplevs seems ok, The
servos are working fine. The green arms are
locked, but master and oplev_summary monitoring |
|
|
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?
|
|
|
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, |
|
|
11227
|
Mon Apr 20 16:42:48 2015 |
steve | Update | SUS | PRM and BS oplev laser replaced | The laser below is dead. JDSU 1103P, SN
P845655 lived for 3.5 years.
|
|
|
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 |
|
|
11229
|
Tue Apr 21 01:17:13 2015 |
Jenne | Update | Modern Control | T-240 self-noise propagated through stack and pendulum | Going back to Wiener filtering for a moment,
I took a look at what the T-240 noise level
looks like in terms of pitch motion on one |
|
|
11230
|
Tue Apr 21 11:55:05 2015 |
Steve | Update | Optical Levers | 1103P noise measurement | Manasa and Steve,
Is this what you want? Dashed
lines are dark. |
|
|
11231
|
Tue Apr 21 15:03:27 2015 |
rana | Update | Optical Levers | 1103P noise measurement | It doesn't work with the lens in there,
but it seems pretty close. Please leave it
as is and I'll play with it after 5 today. |
|
|
11232
|
Tue Apr 21 21:46:34 2015 |
rana | Update | Optical Levers | 1103P noise measurement | To test what the inherent angular noise
of the HeNe 1103P laser is, we're testing
it on a table pointing into the BS OL QPD |
|
|
11233
|
Wed Apr 22 11:21:51 2015 |
Steve | Update | Optical Levers | BS & PRM oplevs are back to normal | BS & PRM oplev is restored. Note: the
F -150 lens was removed right after the first
turning mirror from the laser. This helped |
|
|
11234
|
Wed Apr 22 11:43:28 2015 |
Steve | Update | SUS | ETMX damping restored | ETMX sus damping restored. |
|
|
11235
|
Wed Apr 22 11:48:30 2015 |
manasa | Summary | General | Delay line frequency discriminator for FOL error signal | Since the Frequency counters have not been
a reliable error signal for FOL PID loop,
we will put together an analog delay line |
|
|
11236
|
Wed Apr 22 14:56:18 2015 |
manasa | Summary | General | Delay line frequency discriminator for FOL error signal | [Koji, Manasa]
Since the bandwidth of the fiber
PD is ~ 1GHz, we could design the frequency |
|
|
11237
|
Wed Apr 22 17:04:11 2015 |
rana | Update | Electronics | MC REFL PD back from the dead | Just randomly found this old entry from
3 years ago. We should |
|
|
11238
|
Thu Apr 23 08:43:40 2015 |
Steve | Update | Electronics | EG&G InGaAs diodes in stock | RFpds box is moved from RF cabinet E4 to
clean cabinet S15
Inventory updated at https://wiki-40m.ligo.caltech.edu/RF_Pd_Inventory |
|
|
11239
|
Thu Apr 23 15:40:41 2015 |
Steve | Update | General | torque for 1/4-20 |
Few 1/4 -20 socket cap head screw
with washers were tested for optimum torque. |
|
|
11240
|
Thu Apr 23 21:05:23 2015 |
rana | Update | Computer Scripts / Programs | CDSutils upgrade undone | Q: please update this Wiki
page with the go-back procedure: |
|
|
11241
|
Thu Apr 23 23:07:23 2015 |
Dugolini | Frogs | ALARM | laptops warning | Please!
|
|
|
11242
|
Fri Apr 24 01:16:30 2015 |
Jenne | Update | ASC | Broken Xass? | I ran the "off" script for the
Xarm ASS, followed by the "on"
script, and now the Xarm ASS doesn't |
|
|
11243
|
Fri Apr 24 17:30:32 2015 |
Jenne | Update | VAC | Pressure watch script broken |
|
|
|
11244
|
Fri Apr 24 18:13:36 2015 |
rana | Update | General | torque for 1/4-20 | For 1/4-20 bolts made of 18-8 Stainless
Steel, the recommended torque varies
from 65-100 inch-pounds, depending upon the |
|
|
11245
|
Fri Apr 24 21:31:20 2015 |
Koji | Summary | CDS | automatic mxstream resetting | We were too much annoyed by frequent stall
of mxstream. We'll update the RCG when
time comes (not too much future). |
|
|
11246
|
Fri Apr 24 23:40:15 2015 |
rana | Update | SUS | PRM and BS oplev laser replaced | Recently, Steve replaced the HeNe which
was sourcing the BS & PRM OL. After replacement, |
|
|
11247
|
Sat Apr 25 00:20:16 2015 |
rana | Update | CDS | megatron python autoMC cron | Upgraded python on megatron. Added lines
to the crontab to run autoMX.py. Edited crontab
to have a PYTHONPATH so that it can run .py |
|
|
11248
|
Sat Apr 25 03:32:45 2015 |
Koji | Update | ASC | Broken Xass? | I spent a day to fix the XARM ASS, but
no real result. If the input of the 6th DOF
servo is turned off, the other error signals |
|
|
11249
|
Sat Apr 25 18:50:47 2015 |
ericq | Update | VAC | Pressure watch script broken | Ugh, this turns out to be because cron
doesn't source the controls bashrc that
defines where to find caget and all that |
|
|
11250
|
Sat Apr 25 22:17:49 2015 |
rana | Update | CDS | MXstream restart script working (beta) | Since python from crontab seemed intractable, I replaced autoMX.py |
|
|
11251
|
Sun Apr 26 00:08:56 2015 |
rana | HowTo | elog | Troubles with putting plots in external locations | If it all possible, don't use links
to your home directory. Its not robust. It
would be like if you clicked on your Google |
|
|
11252
|
Sun Apr 26 00:56:21 2015 |
rana | Summary | Computer Scripts / Programs | problems with new restart procedures for elogd and apache | Since the nodus upgrade, Eric/Diego changed
the old csh restart procedures to be more
UNIX standard. The instructions are in the |
|
|
11253
|
Sun Apr 26 01:10:18 2015 |
rana | Update | ASC | unBroken Xass? | Today I tried some things, but basically,
lowering the input gain by 10 made the thing
stable. In the attached screenshotstrip, |
|
|
11254
|
Sun Apr 26 14:17:40 2015 |
Jenne | Update | LSC | POXDC, POYDC unplugged for now | I have unplugged POXDC and POYDC from their
whitening inputs. They have labels
on them which whitening channel they belong |
|
|
11255
|
Sun Apr 26 15:05:35 2015 |
Jenne | Update | ASC | unBroken Xass? | Thank you both.
I have updated the .snap file,
so that it'll use these parameters, as |
|
|
11256
|
Sun Apr 26 15:34:34 2015 |
Jenne | Update | SUS | PRM oplev centered | After last week's work on the BS/PRM
oplev table, I think the PRM oplev got centered
while the PRM was misaligned. With |
|
|
11257
|
Sun Apr 26 20:10:10 2015 |
max isi | HowTo | General | Summary pages | I have set up new summary pages for the
40m: http://www.ligo.caltech.edu/~misi/summary/
This website shows plots (time series, |
|
|
11258
|
Mon Apr 27 01:13:08 2015 |
Jenne | Update | LSC | PRCL angular FF not working, no locking :( | I'm sad. And frustrated.
The PRCL angular feed forward is
not working, and without it I am having a |
|
|
11259
|
Mon Apr 27 09:09:15 2015 |
Steve | Update | PEM | air cond filters checked |
|
|
|
11260
|
Mon Apr 27 14:37:55 2015 |
Steve | Update | VAC | N2 pneumatic pressure watch |
|
|
|
11261
|
Mon Apr 27 21:42:07 2015 |
rana | Update | VAC | Summary pages | We want to have a VAC page in the summaries,
so Steve |
|
|
11262
|
Tue Apr 28 09:49:26 2015 |
Steve | Update | VAC | Vac Summery Channels |
|
|
|
11263
|
Wed Apr 29 18:12:42 2015 |
rana | Update | Computer Scripts / Programs | nodus update | Installed libmotif3 and libmotif4 on nodus
so that |
|
|
11264
|
Thu Apr 30 16:30:25 2015 |
Steve | Update | VAC | N2 pneumatic pressure watch set up | We have 2 transduser PX303-3KG5V
http://www.omega.com/pressure/pdf/PX303.pdf
They will be installed on the out put |
|
|
11265
|
Fri May 1 13:22:08 2015 |
ericq | Update | DAQ | PEM Slow channels added to saved frames | Rana asked me to include add slow outputs
(OUT16) of the seismometer BLRMS channels
to the frames. |
|
|
11266
|
Fri May 1 16:42:42 2015 |
rana | Update | DAQ | PEM Slow channels added to saved frames | Still processing, but I think it should
work fine once we have a day of data. Until
then, here's the summary pages so far, |
|
|
11267
|
Fri May 1 20:33:31 2015 |
rana | Summary | Computer Scripts / Programs | problems with new restart procedures for elogd and apache | Same thing again today. So I renamed the |
|
|
11268
|
Sun May 3 01:04:19 2015 |
rana | Summary | PEM | Seismo signals are bad | https://ldas-jobs.ligo.caltech.edu/~max.isi/summary/day/20150502/pem/seismic/
Looks like some of our seismometers
are oscillating, not mounted well, or something |
|
|
11269
|
Sun May 3 19:40:51 2015 |
rana | Update | ASC | Sunday maintenance: alignment, OL center, seismo, temp sensors | X
arm was far out in yaw, so I reran the ASS
for Y and then X. Ran OK; the offload from |
|
|
11270
|
Mon May 4 10:21:09 2015 |
manasa | Summary | General | Delay line frequency discriminator for FOL error signal | Attached is the schematic of the analog
DFD and the plot showing the zero-crossing
for a delay line length of 27cm. The bandwidth |
|
|
11271
|
Mon May 4 12:35:49 2015 |
rana | Update | LSC | drift in Y arm | http://www.ligo.caltech.edu/~misi/summary/day/20150504/
I left the arms locked last night.
Looks like the drift in the Y arm power is |
|
|
11272
|
Mon May 4 12:42:34 2015 |
manasa | Summary | General | Delay line frequency discriminator for FOL error signal | Koji suggested that I make a cosine fit
for the curve instead of a linear
fit. |
|