| 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. |
|
|
17434
|
Mon Jan 30 18:08:56 2023 |
Paco | Summary | BHD | c1cal DAQ error 0x2000 | [JC, Paco]
I tried restarting all models this
afternoon to see if the DC error 0x2000 on |
|
|
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 |
|
|
17415
|
Tue Jan 24 16:12:07 2023 |
rana | Summary | BHD | FPMI displacement noise with 60 Hz harmonics side lobes | 1) do a comparison with the whtiening before
the ADC on/off. This will tell us if it is
pickup before the whtiening filter or not. |
|
|
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 |
|
|
|
17414
|
Tue Jan 24 11:21:59 2023 |
yuta | Summary | BHD | FPMI displacement noise with 60 Hz harmonics side lobes | Just to show how bad 60 Hz noise is, I
compared FPMI displacement noise with pre-BH44
era (measured on Jan 13, 40m/17400). |
|
|
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 |
|