| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
13458
|
Wed Nov 29 21:40:30 2017 |
johannes | Omnistructure | Computers | Slow DAQ replacement computer progress | [Aaron, Johannes]
We
configured the AtomServer for the Martian |
|
|
13457
|
Wed Nov 29 15:33:16 2017 |
rana | Update | PSL | PMC locking | PMC wasn't locking. Had to power down
c1psl. Did burt restore. Still not great.
I think many of the readbacks on |
|
|
13456
|
Tue Nov 28 17:27:57 2017 |
awade | Bureaucracy | Calibration-Repair | SR560 return, still not charging | I brought a bunch of SR560s over for repair
from Bridge labs. This unit, picture attached
(SN 49698), appears to still not be |
|
|
13455
|
Tue Nov 28 16:02:32 2017 |
rana | Update | PEM | seismometer can testing | I've ordered 4 of these from McMaster.
Should be delivered to the 40m by noon tomorrow.
|
|
|
13454
|
Sun Nov 26 19:38:40 2017 |
Steve | Update | VAC | TP3 drypump replaced again | The TP3 foreline pressure was 4.8 Torr,
50K rpm 0.54A and 31C........Maglev rotation
normal 560 Hz....... IFO pressure |
|
|
13453
|
Thu Nov 23 18:03:52 2017 |
gautam | Update | Optical Levers | Oplev "noise budget" | Here are a couple of preliminary plots
of the noise from a 20minute stretch of data
- the new curve is the orange |
|
|
13452
|
Wed Nov 22 23:56:14 2017 |
gautam | Update | Optical Levers | Oplev "noise budget" | Do not turn
on BS/ITMY/SRM/PRM Oplev servos without reading |
|
|
13451
|
Wed Nov 22 19:20:01 2017 |
rana | Update | Optical Levers | Oplev "noise budget" | too complex; just shoot straight from the
HeNe to the QPD. We lower the gain of the
QPD by changing the resistors; there's |
|
|
13450
|
Wed Nov 22 17:52:25 2017 |
gautam | Update | Optimal Control | Visualizing cost functions | I've attempted to visualize the various
components of the cost function in the way
I've defined it for the current iteration |
|
|
13449
|
Wed Nov 22 16:40:00 2017 |
Koji | Update | Optical Levers | Oplev "noise budget" | You may want to consult with the cryo Q
people (Brittany, Aaron) for a Si QPD. If
you want the same QPD architecture, I can |
|
|
13448
|
Wed Nov 22 15:29:23 2017 |
gautam | Update | Optical Levers | Oplev "noise budget" | [steve,
gautam]
What is the best way to set this |
|
|
13447
|
Wed Nov 22 14:47:03 2017 |
Kira | Update | PEM | seismometer can testing | For the insulation, I have decided to use
this
one (Buna-N/PVC Foam Insulation |
|
|
13446
|
Wed Nov 22 12:13:15 2017 |
Kira | Update | PEM | seismometer can testing | Updated some values, most importantly,
the k-factor. I had assumed that it was in
the correct units already, but when converting |
|
|
13445
|
Wed Nov 22 11:51:38 2017 |
gautam | Configuration | Computers | nodus post OS migration admin | Confirmed that this crontab is running
- the daily backup of the crontab seems to
have successfully executed, and there is |
|
|
13444
|
Wed Nov 22 05:41:32 2017 |
rana | Update | Optical Levers | Oplev "noise budget" | For the OL NB, probably don't have
to fudge any seismic noise, since that's
a thing we want to suppress. More important |
|
|
13443
|
Wed Nov 22 00:54:18 2017 |
johannes | Omnistructure | Computers | Slow DAQ replacement computer progress | I got the the SuperMicro 1U server box
from Larry W on Monday and set it up in the
CryoLab for initial testing. |
|
|
13442
|
Tue Nov 21 23:47:51 2017 |
gautam | Configuration | Computers | nodus post OS migration admin | I restored the nodus crontab (copied over
from the Nov 17 backup of the same at /opt/rtcds/caltech/c1/scripts/crontab/crontab_nodus.20171117080001.
There wasn't a crontab, so I made one |
|
|
13441
|
Tue Nov 21 23:04:12 2017 |
gautam | Update | Optical Levers | Oplev "noise budget" | Per our discussions in the meetings over
the last week, I've tried to put together
a simple Oplev noise budget. The only two |
|
|
13440
|
Tue Nov 21 17:51:01 2017 |
Koji | Configuration | Computers | nodus post OS migration admin | The post OS migration admin for nodusa
bout apache, elogd, svn, iptables, etc can
be found in https://wiki-40m.ligo.caltech.edu/NodusUpgradeNov2017 |
|
|
13439
|
Tue Nov 21 16:28:23 2017 |
gautam | Update | Optical Levers | BS OL calibration updated | The numbers I have from the fitting don't
agree very well with the OSEM readouts. Attachment
#1 shows the Oplev pitch and yaw channels, |
|
|
13438
|
Tue Nov 21 16:00:05 2017 |
Kira | Update | PEM | seismometer can testing | I performed a test with the can last week
with one layer of insulation to see how well
it worked. First, I soldered two heaters |
|
|
13437
|
Tue Nov 21 11:37:29 2017 |
gautam | Update | Optical Levers | BS OL calibration updated | I calibrated the BS oplev PIT and YAW error
signals as follows:
Locked X-arm, ran dither |
|
|
13436
|
Tue Nov 21 11:21:26 2017 |
gautam | Update | CDS | RFM network down | I noticed yesterday evening that I wasn't
able to engage the single arm locking servos
- turned out that they weren't getting |
|
|
13435
|
Fri Nov 17 17:10:53 2017 |
rana | Omnistructure | Computers | Acromag wired up | Exactly: you'll have to list explicitly
what functions those channels had so that
we know what we're losing before we make |
|
|
13434
|
Fri Nov 17 16:31:11 2017 |
aaron | Omnistructure | Computers | Acromag wired up | Acromag
Wireup Update
I
finished wiring up the Acromags to replace |
|
|
13433
|
Thu Nov 16 15:43:01 2017 |
rana | Update | Optical Levers | Optical lever noise | I bet the calibration
is out of date; probably we replaced the |
|
|
13432
|
Thu Nov 16 13:57:01 2017 |
gautam | Update | Optical Levers | Optical lever noise | I disabled the OL loops for ITMX, ITMY
and BS at GPStime 1194897655 to come up with
an Oplev noise budget. OL spots were reasonably |
|
|
13431
|
Thu Nov 16 00:53:26 2017 |
gautam | Update | LSC | DRMI noise sub-budgets | I've incorporated the functionality
to generate sub-budgets for the various grouped
traces in the NBs (e.g. the "A2L" |
|
|
13430
|
Thu Nov 16 00:45:39 2017 |
gautam | Update | SUS | SOS Sapphire Prism design |
|
|
|
13429
|
Thu Nov 16 00:14:47 2017 |
Udit Khandelwal | Update | SUS | SOS Sapphire Prism design | Summary:
SOS solidworks model is
nearly complete
Having trouble |
|
|
13428
|
Wed Nov 15 01:37:07 2017 |
gautam | Update | LSC | DRMI low freq. nosie improved | Pianosa
just crashed and ate my elog, along with |
|
|
13427
|
Tue Nov 14 16:02:43 2017 |
Kira | Summary | PEM | seismometer can testing | I made a model for our seismometer can
using actual data so that we know approximately
what the time constant should be when we |
|
|
13426
|
Tue Nov 14 08:54:37 2017 |
Steve | Update | IOO | MC1 glitching | |
|
|
13425
|
Fri Nov 10 18:57:41 2017 |
rana | Summary | Electronics | Ithaca 1201 vs. SR560 | I characterized the black
Ithaca 1201 pre-amp that we had sitting
in the racks. It works fine and the input |
|
|
13424
|
Fri Nov 10 13:46:26 2017 |
Steve | Update | PEM | M3.1 local earthquake | BOOM
SHAKA-LAKA |
|
|
13423
|
Fri Nov 10 08:52:21 2017 |
Steve | Update | VAC | TP3 drypump replaced | PSL shutter closed at 6e-6 Torr-it
The foreline pressure
of the drypump is 850 mTorr at 8,446 hrs |
|
|
13422
|
Thu Nov 9 15:33:08 2017 |
johannes | Update | CDS | revisiting Acromag |
|
|
|
13421
|
Thu Nov 9 10:51:37 2017 |
gautam | Summary | LSC | current procedure for compiling and installing c1dnn code | Jamie pointed out that the compile and
install instructions are different for c1dnn:
|
|
|
13420
|
Wed Nov 8 17:04:21 2017 |
gautam | Update | CDS | gds-2.17.15 [not] installed | I wanted to use the foton.py utility for
my NB tool, and I remember Chris telling
me that it was shipping as standard with |
|
|
13419
|
Wed Nov 8 16:39:24 2017 |
Kira | Update | PEM | ADC noise measurement | Gautam and I measured the noise of the
ADC for channels 17, 18, and 19. We plan
to use those channels for measuring the noise |
|
|
13418
|
Wed Nov 8 14:28:35 2017 |
gautam | Update | General | MC1 glitches return | There hasn't been a big glitch that
misaligns MC1 by so much that the autolocker
can't lock for at least 3 months, seems |
|
|
13417
|
Wed Nov 8 12:19:55 2017 |
gautam | Update | SUS | coil driver series resistance | We've been talking about increasing
the series resistance for the coil driver
path for the test masses. One consequence |
|
|
13416
|
Wed Nov 8 09:59:12 2017 |
gautam | Update | LSC | DRMI Nosie Budget v3.1 | The Oplev trace is missing for now, as
I have not re-measured the A2L coupling since
modifying the Oplev loop shape (specifically |
|
|
13415
|
Wed Nov 8 09:37:45 2017 |
rana | Update | LSC | DRMI Nosie Budget v3.1 | why no oplev trace in the NB ?
|
|
|
13414
|
Wed Nov 8 00:28:16 2017 |
gautam | Update | LSC | Laser intensity coupling measurement attempt | I tried measuring the coupling of PSL intensity
noise by driving some broadband noise bandpassed
between 80-300Hz using the spare DAC channel |
|
|
13413
|
Tue Nov 7 22:56:21 2017 |
gautam | Update | LSC | DRMI locking recovered | I hadn't re-locked the DRMI after the
work on the AS55 demod board. Tonight, I
was able to recover the DRMI locking with |
|
|
13412
|
Tue Nov 7 17:45:05 2017 |
gautam | Update | LSC | DRMI Nosie Budget v3.1 | Some days ago, I had tried to measure the
SRCL->MICH and PRCL->MICH cross couplings
using broadband noise injected between 120-180 |
|
|
13411
|
Mon Nov 6 18:22:48 2017 |
jamie | Summary | LSC | current procedure for running c1dnn code | This is the current procedure to start
the c1dnn model:
|
|
|
13410
|
Mon Nov 6 11:15:43 2017 |
gautam | Update | CDS | slow machine bootfest + IFO re-alignment | Eurocrate key turning reboots today morning
for |
|
|
13409
|
Mon Nov 6 09:09:43 2017 |
Steve | Update | VAC | setting up new TP2 turbo | Our new Agilent Technology TwisTorr
84FS AG rack controller ( English Manual
pages 195-297 ) RS232/485, product |
|