| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
3617
|
Tue Sep 28 21:11:52 2010 |
koji, tara | Update | Electronics | Fixing the new TTFSS | We
found a small PCB defect which is an excess
copper shorting circuit on the daughter board, |
|
|
3811
|
Thu Oct 28 16:38:54 2010 |
josephb | Update | CDS | Flaky fb, reverted inittab changes on fb | Problem:
Yuta reported many of the signals
being displayed by dataviewer "fuzzier" |
|
|
3814
|
Thu Oct 28 21:20:11 2010 |
yuta | Update | CDS | Flaky fb, tried DAQ re-install, but no help | Summary:
Unfortunately, fb is flakier
than normal. |
|
|
16003
|
Wed Apr 7 02:50:49 2021 |
Koji | Update | SUS | Flange Inspections | Basically I went around all the chambers
and all the DB25 flanges to check the invac
cable configurations. Also took more time |
|
|
16404
|
Thu Oct 14 18:30:23 2021 |
Koji | Summary | VAC | Flange/Cable Stand Configuration | Flange Configuration for BHD
We will need total 5 new
cable stands. So Qty.6 is the number to be |
|
|
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 |
|
|
257
|
Wed Jan 23 20:52:40 2008 |
rana | Summary | Environment | Flooding from construction area | We noticed tonight around 7 PM that [B]there
was a lot of brown water in the control room
and also in the interferometer area[/B] mostly |
|
|
9246
|
Wed Oct 16 10:32:40 2013 |
Steve | Update | SUS | Flowbench effect on oplev error signals | ETMX _OPLEV_...ERROR signals are
effected by turning ON the |
|
|
5951
|
Fri Nov 18 19:07:07 2011 |
Jenne | Update | RF System | Foam house on EOM | [Jenne, Zach, Frank]
Frank helped Zach and I cable up
at PT-100 RTD, and make sure it worked with |
|
|
5954
|
Sat Nov 19 00:09:02 2011 |
Zach | Update | RF System | Foam house on EOM |
|
|
|
6104
|
Mon Dec 12 11:16:02 2011 |
Jenne | Update | RF System | Foam house on EOM | Foam house installed on EOM a few min ago.
We'll leave it until ~tomorrow, then try
out the heater loop. |
|
|
5242
|
Mon Aug 15 17:38:07 2011 |
jamie | Update | General | Foil aperture placed in front of ETMY | We have placed a foil aperture in front
of ETMY, to aid in aligning the Y-arm, and
then the PRC. It obviously needs to |
|
|
15022
|
Wed Nov 13 19:34:45 2019 |
gautam | Update | PEM | Follow-up on seismometer discussion | Attachment
#1 shows the spectra |
|
|
15023
|
Wed Nov 13 20:15:56 2019 |
rana | Update | PEM | Follow-up on seismometer discussion | this
is due to the Equivalence Principle: local |
|
|
15024
|
Wed Nov 13 23:40:15 2019 |
gautam | Update | PEM | Follow-up on seismometer discussion | Here is some disturbance
in the spacetime curvature, where the local |
|
|
15025
|
Thu Nov 14 12:11:04 2019 |
rana | Update | PEM | Follow-up on seismometer discussion | at 1 Hz' this effect is not large so
that's real translation. at lower frequencies
a ground tilt couples to the horizontal sensors |
|
|
15027
|
Fri Nov 15 00:18:41 2019 |
rana | Update | PEM | Follow-up on seismometer discussion | The large ground motion at 1 Hz started
up again tonight at around 23:30. I walked
around the lab and nearby buildings with |
|
|
15030
|
Fri Nov 15 12:16:48 2019 |
gautam | Update | PEM | Follow-up on seismometer discussion | Attachment
#1 is a spectrogram |
|
|
15032
|
Mon Nov 18 14:32:53 2019 |
gautam | Update | PEM | Follow-up on seismometer discussion | The nightly seismic activity enhancement
continued during the weekend. It always shows
up around 10pm local time, persists for ~1 |
|
|
15036
|
Tue Nov 19 21:53:57 2019 |
gautam | Update | PEM | Follow-up on seismometer discussion | The shaking started earlier today than
yesterday, at ~9pm local time.
While the IFO is shaking, I thought |
|
|
15417
|
Fri Jun 19 14:03:50 2020 |
Jordan | Update | VAC | Forepump Tip Seal Replacement | Tip Seals were replaced on the forepumps
for TP2 and TP3, and both are ready to be
installed back onto the forelines. |
|
|
7348
|
Thu Sep 6 10:57:27 2012 |
Jenne | Update | General | Forgot to turn green refl pd back on |
|
|
|
5793
|
Thu Nov 3 13:00:52 2011 |
Jenne | Update | Photos | Formatting of MEDM screen names |
|
|
|
6041
|
Tue Nov 29 18:31:40 2011 |
Den | Update | digital noise | Foton error | In the previous elog we've compared
Matlab and Foton SOS representations using
low-order filter. Now we move on to high |
|
|
6061
|
Thu Dec 1 18:30:39 2011 |
Vladimir, Den | Update | digital noise | Foton error | Foton Matlab Error
We investigated
some more the discrepancy between Matlab |
|
|
6062
|
Fri Dec 2 17:43:46 2011 |
rana | Update | digital noise | Foton error | It would be useful to see some plots so
we could figure out exactly what magnitude
and phase error correspond to "gross" |
|
|
15287
|
Tue Mar 31 09:39:41 2020 |
gautam | Update | CDS | Foton for shaped noise injections | I'd like to re-measure the transfer
function from driving MC2 position to the
MC_L_DQ channel (for feedforward purposes). |
|
|
15288
|
Tue Mar 31 23:35:50 2020 |
rana | Update | CDS | Foton for shaped noise injections | do you really mean awggui cannot make shaped
noise injections via its foton text box ?
That has always worked for me in the past. |
|
|
15289
|
Tue Mar 31 23:54:57 2020 |
gautam | Update | CDS | Foton for shaped noise injections | The problem is that foton does not inherit
the model sample rate when launched from
DTT/awggui. This is likely some shared/linked/dynamic |
|
|
3659
|
Wed Oct 6 12:00:23 2010 |
josephb, yuta, kiwamu | Update | CDS | Found and fixed filter sampling rate problem with suspensions | While we looking using dtt and going over
the basics of its operation, we discovered
that the filter sample rates for the suspensions |
|
|
14500
|
Fri Mar 29 11:43:15 2019 |
Jon | Update | Upgrade | Found c1susaux database bug | I found the current bias output channels,
C1:SUS-<OPTIC>_<DOF>BiasAdj,
were all pointed at C1:SUS-<OPTIC>_ |
|
|
8653
|
Thu May 30 01:02:41 2013 |
Manasa | Update | Green Locking | Found it! | X green beat note
found! |
|
|
4980
|
Sun Jul 17 18:23:23 2011 |
Jenne | Update | PSL | Found the PMC unlocked | It was unlocked since ~4:30am. No
idea why. It's relocked so I can try
round N of measuring the PRC length. |
|
|
3755
|
Thu Oct 21 18:45:50 2010 |
Koji | Update | PSL | Found the beat at 1064nm | [Koji Suresh]
We found the beat at 1064nm. T(PSL)=26.59deg, |
|
|
3756
|
Thu Oct 21 19:10:39 2010 |
Aidan | Update | PSL | Found the beat at 1064nm | |
|
|
3759
|
Fri Oct 22 01:23:13 2010 |
Koji | Update | PSL | Found the beat at 1064nm | [Koji / Suresh]
We worked on the 1064 beating a bit
more. |
|
|
8913
|
Tue Jul 23 21:32:43 2013 |
Koji | Update | IOO | Found the cause of mysterious MC motion | Thesedays
we were continuously annoyed by unELOGGED
activities of the interferometer. |
|
|
8917
|
Wed Jul 24 14:26:24 2013 |
rana | Update | IOO | Found the cause of mysterious MC motion | Yes, this was not ELOG'd by me, unfortunately.
This was the MC tickler which I described
to some people in the control room when I |
|
|
9046
|
Wed Aug 21 19:26:19 2013 |
rana | Update | IOO | Found the cause of mysterious MC motion |
|
|
|
6160
|
Tue Jan 3 17:25:27 2012 |
Koji | Update | PSL | Found the laser was off | I found the PSL laser has been off for
four hours. Nobody seemed to know why.
I just turned it on and it is now |
|
|
6582
|
Mon Apr 30 13:00:50 2012 |
Suresh | Update | CDS | Frame Builder is down | Frame builder is down. PRM has tripped
its watch dogs. I have reset the watch
dog on PRM and turned on the OPLEV. It has |
|
|
6583
|
Mon Apr 30 13:58:25 2012 |
Jamie | Update | CDS | Frame Builder is down |
|
|
|
6584
|
Mon Apr 30 16:56:05 2012 |
Suresh | Update | CDS | Frame Builder is down |
|
|
|
6586
|
Mon Apr 30 20:43:33 2012 |
Suresh | Update | CDS | Frame Builder is down |
|
|
|
6591
|
Tue May 1 08:18:50 2012 |
Jamie | Update | CDS | Frame Builder is down |
|
|
|
10600
|
Mon Oct 13 16:08:49 2014 |
Jenne | Update | CDS | Frame builder is mad | I think the daqd process isn't running
on the frame builder.
|
|
|
10601
|
Mon Oct 13 16:57:26 2014 |
Koji | Update | CDS | Frame builder is mad | CPU load seems extremely high. You need
to reboot it, I think
controls@fb /proc 0$ cat loadavg |
|
|
10602
|
Mon Oct 13 17:09:38 2014 |
ericq | Update | CDS | Frame builder is mad |
This CPU load may have been me deleting
some old frame files, to see if that would |
|
|
4510
|
Mon Apr 11 14:17:22 2011 |
josephb, jamie | Update | CDS | Frame wiper script installed | [Joe, Jamie, Alex]
Fixes:
I
asked Alex which cron to use (dcron? frcron?). |
|
|
4109
|
Wed Jan 5 00:23:30 2011 |
rana | Summary | DAQ | FrameBuilder fails in a new way | Since Leo was trying to demo his LIGO Data
Listener code, he noticed that there was
and NDS2 issue. The NDS2 guy (JZ) noticed |
|