| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
4204
|
Wed Jan 26 02:18:12 2011 |
Koji | Update | SUS | ETMX length to angle matrix | I have put an offset of 1000 counts to
C1:SUS-ETMX_ALS_OFFSET. This actually misalign
the mirror a lot. |
|
|
4203
|
Tue Jan 25 22:49:13 2011 |
Koji | Update | CDS | Front End multiple crash | STATUS:
Rebooted c1lsc and
c1sus. Restarted fb many times.
|
|
|
4202
|
Tue Jan 25 21:57:59 2011 |
Koji | Update | Green Locking | Slow servo for green laser | 1. The dewhitening filter CH6 had no output.
I disconnected the cable and put it to the
monitor out of the AI filter. |
|
|
4201
|
Tue Jan 25 20:42:46 2011 |
Osamu | Update | Green Locking | Slow servo for green laser | I implemented a slow servo for green laser
thermal control on c1scx.mdl. Ch6,7 of ADC
and ch6 of DAC are assigned for this servo |
|
|
4200
|
Tue Jan 25 15:20:38 2011 |
josephb | Update | CDS | Updated c1rfm model plus new naming convention for RFM/Dolphin | After
sitting down for 5 minutes and thinking about
it, I realized the names I had been using |
|
|
4199
|
Tue Jan 25 06:48:55 2011 |
kiwamu | Update | Green Locking | To do list | Here are some
tasks that I want someone to work on during |
|
|
4198
|
Tue Jan 25 05:26:51 2011 |
kiwamu | Update | Green Locking | cavity scan | |
|
|
4197
|
Tue Jan 25 00:09:54 2011 |
Koji | Update | General | Jenne laser is at PSL Lab | I found Tara's elog entry that Jenne laser
is at PSL Lab.
Since we recently use it frequently, |
|
|
4196
|
Mon Jan 24 14:27:13 2011 |
kiwamu | Update | Green Locking | Re: X arm locked ! |
|
|
|
4195
|
Mon Jan 24 13:08:07 2011 |
kiwamu | Update | Green Locking | Re: X arm locked ! |
|
|
|
4194
|
Mon Jan 24 10:39:16 2011 |
josephb | HowTo | DAQ | DAQ Wiki Failure | Actually
both port 8087 and 8088 work to talk to the
frame builder. Don't let the lack of |
|
|
4193
|
Mon Jan 24 10:19:21 2011 |
Koji | Update | Green Locking | X arm locked ! | Well... The ALS loop is engaged and the
error was suppressed.
So, how is the IR error signal stabilized |
|
|
4192
|
Mon Jan 24 09:33:08 2011 |
rana | Update | Green Locking | X arm locked ! | Very cool.
But the PLL seems very fishy to me.
The ZP-3MH needs 13 dBm to operate correctly. |
|
|
4191
|
Mon Jan 24 02:58:46 2011 |
kiwamu | Update | Green Locking | X arm locked ! | I succeeded in |
|
|
4190
|
Sat Jan 22 02:23:26 2011 |
Koji | Update | Green Locking | some more progress | What is the point to use the error instead
of the feedback? It does not make sense to
me. |
|
|
4189
|
Sat Jan 22 02:11:09 2011 |
kiwamu | Update | Green Locking | some more progress | [Rana, Suresh, Kiwanu]
|
|
|
4188
|
Sat Jan 22 02:03:55 2011 |
Koji | Update | Green Locking | Examining the stability of VCO PLL at low frequencies | Damn.
If this figure is true, we were looking at
wrong signal. We should look at the feedback |
|
|
4187
|
Sat Jan 22 01:56:04 2011 |
Suresh | Update | Green Locking | Examining the stability of VCO PLL at low frequencies | [Kiwamu,
Suresh, Rana]
Our |
|
|
4186
|
Fri Jan 21 23:55:25 2011 |
rana | Configuration | LSC | Phase Noise Measurement filter | We've set up a beat note measurement between
the VCO driver and the Marconi (see Suresh's
elog). |
|
|
4185
|
Fri Jan 21 23:17:54 2011 |
rana | HowTo | DAQ | DAQ Wiki Failure | The DAQ Wiki pages say to use port 8088
for restarting the Frame Builder. I tried
this to no avail. |
|
|
4184
|
Fri Jan 21 17:59:27 2011 |
josephb, alex | Update | CDS | Fixed Dolphin transmission | The orientation
of the Dolphin cards seems to be opposite
on c1lsc and c1sus. The wide part is |
|
|
4183
|
Fri Jan 21 15:26:15 2011 |
josephb | Update | CDS | c1sus broken yesterday and now fixed | [Joe,
Koji]
Yesterday's CDS swap of c1sus and |
|
|
4182
|
Fri Jan 21 11:45:01 2011 |
Aidan | Configuration | Locking | Ballpark figures for Green Locking PLLs (Digital vs Analogue) |
|
|
|
4181
|
Fri Jan 21 02:45:43 2011 |
kiwamu | Update | Green Locking | interface for PLL to ADC | [Suresh, Kiwamu]
|
|
|
4180
|
Thu Jan 20 22:17:12 2011 |
rana | Summary | LSC | FPMI Displacement Noise | I found this old plot in an old elog entry
of Osamu's (original
link). |
|
|
4179
|
Thu Jan 20 18:20:55 2011 |
josephb | Update | CDS | c1iscex computer and c1sus computer swapped | Since
the 1U sized computers don't have enough
slots to hold the host interface board, RFM |
|
|
4178
|
Thu Jan 20 17:00:39 2011 |
Aidan | Configuration | Locking | Ballpark figures for Green Locking PLLs (Digital vs Analogue) | If we use a digital PLL for locking the
frequency of the PSL and END green lasers
then we can expect a UGF of around 1kHz (assuming |
|
|
4177
|
Thu Jan 20 15:39:59 2011 |
Aidan | Update | Locking | Upper limit on frequency noise of ADC | [Aidan, Kiwamu]
Kiwamu and I plugged the output from
a DS3456 function generator into the ADC |
|
|
4176
|
Thu Jan 20 15:15:39 2011 |
kiwamu | Update | Green Locking | status update: PLL connected to ADC | I
realized that the black AA board I mentioned |
|
|
4175
|
Thu Jan 20 10:15:50 2011 |
josephb | Update | CDS | c1scy error | This is
caused by an insufficient number of active
DAQ channels in the C1SCY.ini file located |
|
|
4174
|
Thu Jan 20 04:43:28 2011 |
kiwamu | Update | Green Locking | status update: PLL connected to ADC | I
connected the PLL signal to the ADC on c1ioo. |
|
|
4173
|
Thu Jan 20 04:03:02 2011 |
kiwamu | Update | CDS | c1scy error | I found
that c1scy was not running due to a daq initialization |
|
|
4172
|
Thu Jan 20 01:50:30 2011 |
Kevin | Update | Electronics | POX Transfer Functions | [Koji, Kevin]
We fit the entire POX optical transfer
function from 1 MHz to 500 MHz in LISO. The |
|
|
4171
|
Thu Jan 20 00:39:22 2011 |
kiwamu | HowTo | CDS | DAQ setup : another trick | Here
is another trick for the DAQ setup when you
add a DAQ channel associated with a new front |
|
|
4170
|
Wed Jan 19 17:00:23 2011 |
Kevin | Update | Electronics | POX Transfer Functions | The value of I_dc was a mistake.
The value should be 240 µA.
The widths of the resonance peaks |
|
|
4169
|
Wed Jan 19 10:45:00 2011 |
Koji | Update | Electronics | POX Transfer Functions | TF looks fine except for the large peak
at around 200MHz which has been reported
by Rana. The time series and the spectrum |
|
|
4168
|
Wed Jan 19 10:31:24 2011 |
josephb | Update | elog | Elog restarted again | Elog wasn't
responding at around 10 am this morning.
I killed the elogd process, then used the |
|
|
4167
|
Wed Jan 19 04:25:54 2011 |
Kevin | Update | Electronics | POX Transfer Functions | I redid the optical POX transfer functions
and updated the wiki at http://lhocds.ligo-wa.caltech.edu:8000/40m/Electronics/POX.
I measured each transfer function |
|
|
4166
|
Wed Jan 19 03:37:30 2011 |
Suresh | Update | Locking | comparing the PSL with the X-end-NPRO through the green beat |
[Kiwamu, Suresh] |
|
|
4165
|
Tue Jan 18 10:25:23 2011 |
steve | Update | PEM | vertex crane work this week | The crane people are here. The Vertex chambers
are covered with plastic. The PSL HEPAs will
be running on high during the day. |
|
|
4164
|
Mon Jan 17 20:13:38 2011 |
rana | Update | Electronics | POX_11 Optical TF | I used 50 mA to drive the laser diode.
The light is split 50/50 between the DUT
(Device Under Test) and the New Focus 1611 |
|
|
4163
|
Mon Jan 17 15:31:50 2011 |
josephb | Update | Cameras | Test the Basler acA640-100gm camera | The Basler
acA640-100gm is a power over ethernet camera.
It uses a power injector to supply power |
|
|
4162
|
Mon Jan 17 04:10:10 2011 |
rana | Configuration | Computers | NTPD restarted on c1dcuepics (to fix the MEDM screen times) | I installed NTPD on Megatron (its Ubuntu,
so different from the CentOS workstations).
Here's the terminal cap to show that its |
|
|
4161
|
Sun Jan 16 02:20:59 2011 |
Suresh | Update | Locking | comparing the PSL with the X-end-NPRO through the green beat | Objective:
We
wish to study the coherence of the two NPROs |
|
|
4160
|
Fri Jan 14 20:39:20 2011 |
rana | Update | CDS | Updated some DAQ channel names | I like this activateDAQ script, but someone |
|
|
4159
|
Fri Jan 14 20:37:00 2011 |
kiwamu | HowTo | Green Locking | plan for this month | I summarized how we proceed our green
locking in this month on the wiki.
Since step1 and 2 shown on the wiki |
|
|
4158
|
Fri Jan 14 17:58:50 2011 |
Osamu | Configuration | General | Standalone RT setup | I'll be gone to Hanford site next
week and come back to Caltech on 24th's week.
I setup a standalone RT system at |
|
|
4157
|
Fri Jan 14 17:13:39 2011 |
josephb | Update | Cameras | Pylon driver for Basler Cameras installed on Megatron | After getting some help from the Basler
technical support, I was directed to the
following ftp link: |
|
|
4156
|
Fri Jan 14 12:34:08 2011 |
Koji | Update | LSC | X arm locked with C1LSC digital control | My feeling was that the saturation was
caused by the LSC whitening filter which
was always on. |
|
|
4155
|
Fri Jan 14 12:29:57 2011 |
Koji | Update | Locking | Next steps for the green | These are the next steps for a better operation
of the arm locking. They are suitable for
the day time activities |
|