| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
14518
|
Fri Apr 5 11:40:57 2019 |
Anjali | Update | Frequency noise measurement | Frequency noise measurement of 1 micron source |
Attachment #1 shows the present
experimental setup. The photodiode is now
replaced with PDA255. The farther end of |
|
|
14520
|
Sat Apr 6 02:07:40 2019 |
Anjali | Update | Frequency noise measurement | Frequency noise measurement of 1 micron source |
The alignment of the output beam
from the delayed path of MZI to the photodetector
was disturbed when we did the polarisation |
|
|
14529
|
Wed Apr 10 00:33:09 2019 |
Anjali | Update | Frequency noise measurement | Frequency noise measurement of 1 micron source |
Attachement #1 shows the input
(ch4-green) modulation frequency and
the photodiode output (ch1-yellow) when the |
|
|
14540
|
Fri Apr 12 01:22:27 2019 |
Anjali | Update | Frequency noise measurement | Frequency noise measurement of 1 micron source | The alignement was disturbed after the
replcement of the beam splitter. We tried
to get the alignment back . But we are |
|
|
14579
|
Fri Apr 26 12:10:08 2019 |
Anjali | Update | Frequency noise measurement | Frequency noise measurement of 1 micron source | From the earlier results with homodyne
measurement,the Vmax and Vmin
values observed were comparable with |
|
|
14586
|
Tue Apr 30 17:27:35 2019 |
Anjali | Update | Frequency noise measurement | Frequency noise measurement of 1 micron source | We repeated the homodyne measurement to
check whether we are measuring the actual
frequency noise of the laser. The idea was |
|
|
11800
|
Mon Nov 23 20:32:43 2015 |
Koji | Update | LSC | Frequency source fixed, IMC LO level adjusted | The frequency source was fixed. The IMC
LO level was adjusted.
IMC is locked => OLTF measured |
|
|
11801
|
Mon Nov 23 21:48:49 2015 |
Koji | Update | LSC | Frequency source fixed, IMC LO level adjusted | The trouble we had: the 29.5 MHz
source had an output of 6 dBm instead
of 13 dBm. |
|
|
14476
|
Fri Mar 8 08:40:26 2019 |
Anjali | Configuration | | Frequency stabilization of 1 micron source | The schematic of the homodyne configuration
is shown below.
Following are the list of components |
|
|
6195
|
Fri Jan 13 00:51:40 2012 |
Leo Singer | Update | Stewart platform | Frequency-dependent requirements for Stewart platform | Below are revised design parameters for
the Stewart platform based on ground motion
measurements. |
|
|
15061
|
Mon Dec 2 23:01:47 2019 |
gautam | Update | CDS | Frequent DTT crashes on pianosa | I have been experiencing frequent crashes of |
|
|
13734
|
Fri Apr 6 16:07:18 2018 |
gautam | Update | CDS | Frequent EPICS dropouts | Kira informed me that she was having trouble
accessing past data for her PID tuning tests.
Looking at the last day of data, |
|
|
14208
|
Fri Sep 21 19:50:17 2018 |
Koji | Update | CDS | Frequent time out | Multiple realtime processes on c1sus are
suffering from frequent time outs. It eventually
knocks out c1sus (process). |
|
|
14210
|
Sat Sep 22 00:21:07 2018 |
Koji | Update | CDS | Frequent time out | [Gautam, Koji]
We had another crash of c1sus and
Gautam did full power cycling of c1sus. It |
|
|
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. |
|
|
11929
|
Tue Jan 12 19:38:31 2016 |
gautam | Update | LSC | Frequently making noise | EDITS
15Jan:
Schematic |
|
|
4885
|
Sun Jun 26 16:02:12 2011 |
kiwamu | Update | IOO | Friday MC activity | [Rana / Kiwamu]
Last Friday we did several
things for MC : |
|
|
9641
|
Sun Feb 16 17:40:11 2014 |
Koji | Update | LSC | Friday Night ALS | I wanted to try common/differential ALS
Friday evening. I tried ALS using the LSC
servo but this was not successfull. |
|
|
7334
|
Tue Sep 4 11:32:58 2012 |
Jenne | Update | Locking | Friday in-vac work | Elog re: Friday's work
Adjusted PZT2 so we're hitting the
center of PR2. |
|
|
4884
|
Sat Jun 25 06:09:38 2011 |
kiwamu | Update | LSC | Friday locking | I
was able to measure the sensing matrix in
the PRMI configuration. |
|
|
1909
|
Sat Aug 15 05:08:55 2009 |
Yoichi | Update | Locking | Friday night locking | Summary: DD hand off fails for DRFPMI.
Tonight, I did a lot of house keeping work.
|
|
|
61
|
Sun Nov 4 23:55:24 2007 |
rana | Update | IOO | Friday's In-Vac work | On Friday morning when closing up we noticed
that we could not get the MC to flash any
modes.
|
|
|
62
|
Mon Nov 5 07:29:35 2007 |
rana | Update | IOO | Friday's In-Vac work | Liyuan recently did some of his pencil beam
scatterometer measurements measuring not
the
|
|
|
4203
|
Tue Jan 25 22:49:13 2011 |
Koji | Update | CDS | Front End multiple crash | STATUS:
Rebooted c1lsc and
c1sus. Restarted fb many times.
|
|
|
4206
|
Wed Jan 26 10:58:48 2011 |
josephb | Update | CDS | Front End multiple crash | Looking
at dmesg on c1lsc, it looks like the model
is starting, but then eventually times out |
|
|
4207
|
Wed Jan 26 12:03:45 2011 |
Koji | Update | CDS | Front End multiple crash | This is definitely a nice magic to know
as the rebooting causes too much hustles.
Also, you and I should spend an hour |
|
|
3837
|
Mon Nov 1 15:35:41 2010 |
josephb | Update | CDS | Front end USR and CPU times now recorded by DAQ | Problem:
We have no record of how long the
CPUs are taking to perform a cycle's worth |
|
|
4312
|
Thu Feb 17 11:49:48 2011 |
josephb | Update | CDS | Front end start/stop scripts go to /scripts/FE again | I modified the core/advLigoRTS/Makefile
to once again place the startc1SYS and killc1SYS
scripts in the scripts/FE/ directory. |
|
|
8858
|
Tue Jul 16 15:22:27 2013 |
manasa | Update | CDS | Front ends back up | c1sus, c1ioo, c1iscex and c1iscey were
down. Why? I was trying to lock the arm and
I found that around this time, several computers |
|
|
12827
|
Mon Feb 13 19:44:55 2017 |
Lydia | Update | IMC | Front panel for 29.5 MHz amplifier box | I made a tentative front panel design for
the newly installed amplifier box. I used
this chassis |
|
|
12861
|
Wed Mar 1 21:15:40 2017 |
Lydia | Update | IMC | Front panel for 29.5 MHz amplifier box |
I installed the front panel today.
While I had the box out I also replaced |
|
|
12862
|
Wed Mar 1 23:56:09 2017 |
gautam | Update | IMC | Front panel for 29.5 MHz amplifier box | The
alignment wasn't disturbed for the photo-taking
- I just re-checked that the spot is indeed |
|
|
12865
|
Thu Mar 2 20:32:18 2017 |
Lydia | Update | IMC | Front panel for 29.5 MHz amplifier box | [gautam, lydia]
I pulled out the box and found
the problem: the +24 V input to the amplifier |
|
|
16167
|
Fri May 28 11:16:21 2021 |
Jon | Update | CDS | Front-End Assembly and Testing | An update on recent progress in the lab
towards building and testing the new FEs.
1. Timing problems resolved / |
|
|
16185
|
Sun Jun 6 08:42:05 2021 |
Jon | Update | CDS | Front-End Assembly and Testing | Here is an update and status report on
the new BHD front-ends (FEs).
Timing
The changes |
|
|
16220
|
Tue Jun 22 16:53:01 2021 |
Ian MacMillan | Update | CDS | Front-End Assembly and Testing | The channels on both the C1BHD and C1SUS2
seem to be frozen: they arent updating and
are holding one value. To fix this Anchal |
|
|
16224
|
Thu Jun 24 17:32:52 2021 |
Ian MacMillan | Update | CDS | Front-End Assembly and Testing | Anchal and I ran tests on the two systems
(C1-SUS2 and C1-BHD). Attached are the results
and the code and data to recreate them. |
|
|
16225
|
Fri Jun 25 14:06:10 2021 |
Jon | Update | CDS | Front-End Assembly and Testing | Summary
Here is the final
summary (from me) of where things stand with
the new front-end systems. With Anchal and |
|
|
15872
|
Fri Mar 5 17:48:25 2021 |
Jon | Update | CDS | Front-end testing | Today I moved the c1bhd machine from the
control room to a new test area set up behind
(west of) the 1X6 rack. The test stand is |
|
|
15890
|
Tue Mar 9 16:52:47 2021 |
Jon | Update | CDS | Front-end testing | Today I continued with assembly and testing
of the new front-ends. The main progress
is that the IO chassis is now communicating |
|
|
15924
|
Tue Mar 16 16:27:22 2021 |
Jon | Update | CDS | Front-end testing | Some progress today towards setting up
an isolated subnet for testing the new front-ends.
I was able to recover the fb1 backup disk |
|
|
15925
|
Tue Mar 16 19:04:20 2021 |
gautam | Update | CDS | Front-end testing | Now that I think about it, I may only have
backed up the root file system of chiara,
and not |
|
|
15947
|
Fri Mar 19 18:14:56 2021 |
Jon | Update | CDS | Front-end testing | Summary
Today I finished setting
up the subnet for new FE testing. There
are clones of both fb1 and chiara running |
|
|
15959
|
Wed Mar 24 19:02:21 2021 |
Jon | Update | CDS | Front-end testing | This evening I prepared a new 2 TB 3.5"
disk to hold a copy of /opt/rtcds and /opt/rtapps
from chiara. This is the final piece of setup |
|
|
15976
|
Mon Mar 29 17:55:50 2021 |
Jon | Update | CDS | Front-end testing | Cloning of chiara:/home/cvs underway
I
returned today with a beefier USB-SATA adapter,
which has an integrated 12 V supply |
|
|
15979
|
Tue Mar 30 18:21:34 2021 |
Jon | Update | CDS | Front-end testing | Progress today:
Outside Internet access for FE
test stand
This morning Jordan |
|
|
2772
|
Mon Apr 5 13:52:45 2010 |
Alberto | Update | Computers | Front-ends down. Rebooted | This morning, at about 12 Koji found all
the front-ends down.
At 1:45pm rebooted ISCEX, ISCEY, |
|
|
2376
|
Thu Dec 10 08:40:12 2009 |
Alberto | Update | Computers | Fronte-ends down | I found all the front-ends, except for
C1SUSVME1 and C0DCU1 down this morning. DAQAWG
shows up green on the C0DAQ_DETAIL screen |
|
|
2378
|
Thu Dec 10 08:50:33 2009 |
Alberto | Update | Computers | Fronte-ends down |
|
|
|
2382
|
Thu Dec 10 10:01:16 2009 |
Jenne | Update | Computers | Fronte-ends down | All the front ends are back up.
|
|