40m
QIL
Cryo_Lab
CTN
SUS_Lab
TCS_Lab
OMC_Lab
CRIME_Lab
FEA
ENG_Labs
OptContFac
Mariner
WBEEShop
40m Log, Page 1 of 339
Not logged in
List
|
Find
|
Login
|
Help
Full
| Summary |
Threaded
-- All entries --
Last day
Last 3 Days
Last week
Last month
Last 3 Months
Last 6 Months
Last Year
-- Type --
Configuration
Update
Summary
HowTo
Bureaucracy
Omnistructure
Metaphysics
Frogs
16936 Entries
Goto page 1,
2
,
3
...
337
,
338
,
339
Next
ID
Date
Author
Type
Category
Subject
Text
9420
Thu Nov 21 10:24:50 2013
Koji
Update
SUS
beam dumps
You don't need the fourth glass piece on
the diamond beam dump.
15930
Wed Mar 17 11:57:54 2021
Paco, Anchal
Update
SUS
Tested New Input Matrix for MC1
[Paco, Anchal]
Paco accidentally clicked on C1:SUS-MC1_UL_TO_COIL_SW_1_1
(MC1 POS to UL Coil Switch) and clicked it
7358
Fri Sep 7 09:37:20 2012
Steve
Update
Cameras
baffle plate for SOS
7375
Wed Sep 12 17:02:00 2012
Steve
Update
Cameras
baffle plate hole getting larger
9419
Thu Nov 21 09:56:15 2013
Steve
Update
SUS
green glass beam dumps
Green
welding glass is used in these
Koji
15160
Mon Jan 27 21:35:06 2020
Yehonathan
Update
PSL
Ringdown measurements
Zeroth
order IMC ringdown setup
Following
15617
Wed Oct 7 16:56:23 2020
anchal
Summary
ALS
ALS noise budget update - Updated AUX PDH Loop values
AUX PDH Loop update
I
used D1400293
to get the latest logged details about the
11926
Tue Jan 12 03:03:55 2016
ericq
Update
LSC
Frequently making noise
Gautam will soon follow up with detailed
analysis, but here is a brief summary of
some of our activities and findings.
11924
Sat Jan 9 00:39:15 2016
gautam
Update
LSC
AUX Y Freq Noise re-measured
11925
Mon Jan 11 19:01:56 2016
gautam
Update
LSC
PLL Marconi Investigation
EDIT 01/12/2016 6PM:
I've updated the plots of the in-loop
6x
11929
Tue Jan 12 19:38:31 2016
gautam
Update
LSC
Frequently making noise
EDITS
15Jan:
Schematic
15290
Wed Apr 1 00:51:41 2020
gautam
Update
Wiener
Slightly improved MCL FF
Summary:
Retraining the MCL filters resulted
in a slight improvement in the performance.
15619
Thu Oct 8 11:59:52 2020
rana
Summary
ALS
ALS noise budget update - Updated AUX PDH Loop values
For all the loops where we drive the NPRO
PZT, there is some notch/resonance feature
due to the PZT mechanical resonance. In the
3290
Mon Jul 26 10:04:24 2010
steve
Update
General
Initial Crane Inspection reveals flaws: wiring, oil and imbalance
3312
Wed Jul 28 16:42:21 2010
steve
Update
General
Crane gear box cheched
3378
Fri Aug 6 17:47:36 2010
steve
Summary
General
cranes load tested at 1998 lbs
15177
Thu Jan 30 15:24:10 2020
?
Update
General
delay line frequency discriminator for PM
yes, its fine to use this
with a level 3 or level 7 mixer; let's
2438
Mon Dec 21 07:30:58 2009
???
Update
ASS
OAF Model update and build instructions
What does OAF stand for? The entry
doesn't say that. Also the acronym is not
in the abbreviation page of the wiki.
12153
Tue Jun 7 17:21:13 2016
Aakash
Update
General
SURF 2016
Hi!
I am Aakash Patil. I will be working
at the 40m lab as a SURF student with Gautam
12160
Thu Jun 9 09:57:06 2016
Aakash
Update
General
Seismometer Enclosure Development
Me and Gautam yesterday
opened the tilt-free seismometer enclosure
to see if we could use the thermocouples
12163
Thu Jun 9 18:54:40 2016
Aakash
Update
General
About Acromag | SURF 2016
Today I tried to setup Acromag Busworks
card. I was able to calibrate and test it
over USB but I couldn't test it over
12172
Mon Jun 13 19:30:58 2016
Aakash
Update
General
EPICS Installation | SURF 2016
About acquiring data: Initially I couldn't
start with proper Acromag setup as the Raspberry
pi had a faulty SD card slot. Then Gautam
12224
Tue Jun 28 22:54:43 2016
Aakash
Update
General
Seismometer Enclosure Development | SURF 2016
The existing enclosure for seismometer
at LIGO 40m lab is a cylindrical stainless
steel can placed upside down over the seismometer.
12225
Wed Jun 29 00:09:36 2016
Aakash
Update
General
Things from past | SURF 2016
I have taken out the heaters and temperature
sensors from the enclosure which was made
by Megan last summer. Soon I will test and
12236
Fri Jul 1 01:52:54 2016
Aakash
Update
General
Seismometer Enclosure Development | SURF 2016
I have transferred most of the temperature
measurement stuff from the front area to
seismometer at the end of Y-arm. While
12253
Wed Jul 6 16:40:09 2016
Aakash
Update
General
Seismometer Enclosure Development | SURF 2016
I am using AD592CNZ temperature
transducer ICs for measuring temperature
inside as well as outside the enclosure.
12273
Fri Jul 8 13:01:23 2016
Aakash
Update
General
Acromag is talking ! | SURF 2016
Acromag is talking now, after few changes
to the original EPICS configuration and cross
compile configuration. Modbus config files
12306
Fri Jul 15 17:44:37 2016
Aakash
Summary
General
Acromag Setup | SURF2016
Aidan has described the physical connections
and initial setup here : https://nodus.ligo.caltech.edu:30889/ATFWiki/doku.php?id=main:resources:computing:acromag#recovering_from_a_terminal_power_communication_outage
.
12308
Mon Jul 18 05:05:05 2016
Aakash
Update
General
Heater for Seismometer Enclosure | SURF 2016
I took off the silicon rubber heaters which
were used by a SURF last year for heating
the enclosure. The heater data sheet has
12317
Thu Jul 21 05:22:26 2016
Aakash
Update
General
Temperature measurements across the enclosure | SURF 2016
I have measured the transfer function of
temperature fluctuations inside the enclosure
to that of the temperature fluctuations outside.
12323
Thu Jul 21 21:38:44 2016
Aakash
Update
General
Temperature measurements across the enclosure | SURF 2016
I have made the changes as suggested by
Gautam.
12326
Fri Jul 22 05:20:26 2016
Aakash
Update
General
Temperature measurements across the enclosure | SURF 2016
Please find the new attached plots and
the new script.
12352
Fri Jul 29 03:44:04 2016
Aakash
Summary
About Acromag | SURF 2016
I tried to recompile the modbusApp binary
for linux-arm acrhitecture since I suspected
someting wrong with it. But still the problem
12360
Mon Aug 1 18:50:29 2016
Aakash
Update
General
Acromag Setup | SURF2016
There were many unknown and unsolved problems
with using modbusApp for linux-arm architecture.
So I tried to install the necessary files
7x
12366
Wed Aug 3 15:35:19 2016
Aakash
Update
General
Acromag Setup | SURF2016
Lydia helped me to troubleshoot the Accromag
connection problems which I was facing previously.
If power goes off/turned off manually, the
3484
Sat Aug 28 08:17:51 2010
Aberto
Update
Electronics
FSS Frequency Generation Box under test
I've taken the FSS frequency generation
box out of the 1Y1 rack. It's sitting on
one of the electronics benches. I'm measuring
161
Mon Dec 3 19:44:58 2007
Accelerometers on new mounts
Configuration
PEM
Andrey
I (Andrey) continued today working with new
accelerometer mounting. (see entry #151 about
742
Sat Jul 26 15:09:57 2008
Aidan
Update
Computers
Reboot of op440m
I was reviewing the PSL Overview screen this
afternoon and op440m completely froze when
1205
Mon Dec 29 18:01:07 2008
Aidan
Update
Auxiliary locking
Updated 40m Upgrade Document T080074-00-R
Added a paragraph to the 40m Upgrade document
describing the fiber stabilization and frequency
1687
Fri Jun 19 13:39:29 2009
Aidan
Update
General
Upper limit measurement of the scatter from the eLIGO beam dumps.
1782
Thu Jul 23 07:34:45 2009
Aidan
Update
CDS
Added C2 MEDM screens to 40m SVN.
See Adhikari eLOG entry: http://nodus.ligo.caltech.edu:8080/AdhikariLab/194
2792
Mon Apr 12 17:48:32 2010
Aidan
Update
Computer Scripts / Programs
elog restarted
The elog crashed when I was uploading
a photo just now. I logged into nodus and
restarted it.
2793
Mon Apr 12 19:50:30 2010
Aidan
Summary
Green Locking
Temperature sweep of the Lightwave: df/dT = 2.8GHz/K
The beams from the Innolight and Lightwave
NPROs were both incident on a 1GHZ New Focus
PD. Mott and I swept the temperature of the
2807
Mon Apr 19 11:31:04 2010
Aidan
Update
Green Locking
1W NPRO output profile
2809
Mon Apr 19 16:27:13 2010
Aidan
Update
Green Locking
Raicol crystals arrived and we investigated them
Jenne, Koji and I opened up the package
from Raicol and examined the crystals under
the microscope. The results were mixed and
2816
Tue Apr 20 11:14:31 2010
Aidan
Update
Green Locking
Raicol crystals arrived and we investigated them
Here
is Crystal 724 polished side 2 with all photos
2910
Tue May 11 14:39:17 2010
Aidan
Update
Green Locking
Green Laser Beam Profile
Here's a photo of the set-up
used. The beam profile is measured relative
2951
Wed May 19 14:36:46 2010
Aidan
HowTo
Phase Camera
Phase Camera algorithm and stuff
I had a think about the algorithm
we might use for the phase camera measurement.
MATLAB has an fft function that will allow
2955
Thu May 20 10:06:56 2010
Aidan
HowTo
Phase Camera
Phase Camera- raw data video
2995
Wed May 26 18:54:55 2010
Aidan
Summary
Green Locking
Mounted Crystal 724 in the Doubling Oven
Andri and I mounted the Raicol Crystal
#724 in one of the new Covesion Ovens. The
procedure was the same as before - see
Goto page 1,
2
,
3
...
337
,
338
,
339
Next
ELOG V3.1.3-