ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
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 |
|
|
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. |
|
|
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). |
|
|
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 |
|
|
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 |
|
|
4189
|
Sat Jan 22 02:11:09 2011 |
kiwamu | Update | Green Locking | some more progress | [Rana, Suresh, Kiwanu]
|
|
|
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. |
|
|
4191
|
Mon Jan 24 02:58:46 2011 |
kiwamu | Update | Green Locking | X arm locked ! | I succeeded in |
|
|
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. |
|
|
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 |
|
|
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 |
|
|
4195
|
Mon Jan 24 13:08:07 2011 |
kiwamu | Update | Green Locking | Re: X arm locked ! |
|
|
|
4196
|
Mon Jan 24 14:27:13 2011 |
kiwamu | Update | Green Locking | Re: X arm locked ! |
|
|
|
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, |
|
|
4198
|
Tue Jan 25 05:26:51 2011 |
kiwamu | Update | Green Locking | cavity scan | |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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. |
|
|
4203
|
Tue Jan 25 22:49:13 2011 |
Koji | Update | CDS | Front End multiple crash | STATUS:
Rebooted c1lsc and
c1sus. Restarted fb many times.
|
|
|
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. |
|
|
4205
|
Wed Jan 26 10:11:47 2011 |
Aidan | Update | Green Locking | cavity scan |
|
|
|
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 |
|
|
4208
|
Wed Jan 26 12:04:31 2011 |
josephb | Update | CDS | Explanation of why c1sus and c1lsc models crash when the other one goes down | So apparently
with the current Dolphin drivers, when one
of the nodes goes down (say c1lsc), it causes |
|
|
4209
|
Wed Jan 26 14:49:48 2011 |
Aidan | Update | Environment | Turned on Control room AC | 80 degrees is too uncomfortable in the
control room so I turned on the AC. The set
point is 74F. |
|
|
4210
|
Thu Jan 27 03:24:56 2011 |
Kevin | Update | Electronics | POY Optical Transfer Function | [Rana and Kevin]
I measured the optical transfer function
of POY and fit the data using LISO. The fit |
|
|
4211
|
Thu Jan 27 11:04:27 2011 |
Koji | Update | Green Locking | beat freq scan | Experiment in the night of Jan 26.
o The arm was locked for the IR beam
and was aligned for it. |
|
|
4212
|
Thu Jan 27 15:16:43 2011 |
josephb | Update | CDS | Updated generate_master_screens.py | I modified
the generate_master_screens.py script in
/opt/rtcds/caltech/c1/medm/master/ to handle |
|
|
4213
|
Thu Jan 27 17:12:02 2011 |
Aidan, Joe | Summary | Green Locking | Digital Frequency to Amplitude converter | Joe and I built a very simple digital frequency
to amplitude converter using the RCG. The
input from an ADC channel goes through a |
|
|
4214
|
Thu Jan 27 21:10:47 2011 |
Osamu | Update | 40m Upgrading | Calibrated noise of green | I calibrated noise spectrum of green lock.
1. Measurement of conversion factor
of ADC input from V to ct: |
|
|
4215
|
Thu Jan 27 21:43:37 2011 |
Koji | Update | Green Locking | no transmission of ALS signals | No signal is transmitted from C1:GCV-SCX_ETMX_ALS
(on c1gcv) to C1:GCV-SCX_ETMX_ALS (on c1scx)
I can't find RFM definition for ALS |
|
|
4216
|
Thu Jan 27 23:21:50 2011 |
rana | Summary | Green Locking | Digital Frequency Discriminator | That's some pretty fast work! I
thought we would be taking up to a week to
get that happening. I wonder what's the right |
|
|
4217
|
Fri Jan 28 09:03:38 2011 |
Aidan | Summary | Green Locking | Digital Frequency Discriminator |
|
|
|
4218
|
Fri Jan 28 10:27:46 2011 |
Aidan, Joe | Summary | Green Locking | Digital Frequency Discriminator - calibration | One more thing ... we can calibrate
the output of the LP filter to give a result
in Hz with the following calibration: |
|
|
4219
|
Fri Jan 28 11:08:44 2011 |
josephb | Update | Green Locking | no transmission of ALS signals | As you've
correctly noted, the source of the C1:GCV-SCX_ETMX_ALS
channels is in the c1gcv model. The first |
|
|
4220
|
Fri Jan 28 12:15:58 2011 |
josephb | Update | CDS | Updating conlog channel list/ working on "HealthCheck" script | I've updated
the scan_adls script (currently located in
/cvs/cds/caltech/conlog/bin) to look at new |
|
|
4221
|
Fri Jan 28 13:05:56 2011 |
Koji | Configuration | Computers | script path fixed | We had some issues in terms of the script
paths. I have fixed it by replacing /cvs/cds/caltech/scripts
to /cvs/cds/rtcds/caltech/c1/scripts |
|
|
4222
|
Fri Jan 28 13:07:31 2011 |
Jenne | Update | IOO | Beam is back on the WFS | The MC WFS have had beam dumps in front
of them for the past ~2 weeks, until I could
find the appropriate optic to put in the |
|
|
4223
|
Fri Jan 28 15:50:44 2011 |
Jenne | Configuration | PSL | The PSL has a name! | Back in the days when we were talking about
getting a new 2W PSL, I was given naming
rights by Rana for this new laser. |
|
|
4224
|
Fri Jan 28 18:19:21 2011 |
Jenne | Update | IOO | WFS2 has some kind of oil on it | Mystery solved!
I removed WFS2 from the AP table
(after placing markers so I can put it back |
|
|
4225
|
Sat Jan 29 00:31:05 2011 |
Suresh | Update | General | Vertex crane upgrade completed | The
Vertex crane is smarter and safer now. |
6x |
|
4226
|
Sat Jan 29 03:13:44 2011 |
rana | Update | WienerFiltering | Improvement in H1 Wiener FF prediction by using weights and taps | (Jenne, Rana)
Tonight we noticed that there
were significant improvements to be had in |
|
|
4227
|
Sun Jan 30 17:15:09 2011 |
Aidan | Summary | Green Locking | Digital Frequency discriminator - frequency noise | I've had a go at trying to estimate the
frequency noise of the digital frequency
discriminator (DFD). I input a 234.5Hz (0.5Vpp) |
|
|
4228
|
Sun Jan 30 19:26:03 2011 |
Koji | Summary | Green Locking | Prototype freq divider | A prototype freq divider has been made
which works up to ~40MHz.
74HC4060 (14bit binary ripple counter) |
|
|
4229
|
Mon Jan 31 07:03:59 2011 |
Aidan | Summary | Green Locking | DFD - noise spectra |
|
|
|
4230
|
Mon Jan 31 07:41:23 2011 |
Aidan | Update | Green Locking | DFD - medm screen | I added an MEDM screen for the DFD to the
GREEN screen. It is displayed in the attached
screen shot. |
|
|
4231
|
Mon Jan 31 10:31:30 2011 |
josephb | Update | WienerFiltering | Improvement in H1 Wiener FF prediction by using weights and taps | Rossa is a rather beefy machine. It effectively
has 8 Intel i7 Cores (2.67 Ghz each) and
12 Gigs of ram. Megatron only has 8 |
|
|
4232
|
Mon Jan 31 12:40:38 2011 |
rana, joe | Update | Green Locking | DFD - medm screen | This is a plot showing the old filters
and the new ones we added this morning.
The new ones have a Cheby for AC |
|
|
4233
|
Mon Jan 31 16:12:11 2011 |
steve | Update | VAC | Vertex crane upgrade shorth coming |
|
|