| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
4571
|
Tue Apr 26 22:56:35 2011 |
Zach | Update | elog | restarted | with script |
|
|
4570
|
Tue Apr 26 22:56:01 2011 |
kiwamu | Update | LSC | c1iscaux2 and c1iscaux restrated | While checking whitening filters on the
LSC rack, I found some epics controls for
the whitening looked not working. |
|
|
4569
|
Tue Apr 26 22:03:49 2011 |
rana | Update | Electronics | POX_11 debugging | I used the Jenne AM laser to tune up the
PD (used to be POX_11 but now is called REFL_11).
In addition to the notch at 22 MHz, I have |
|
|
4568
|
Tue Apr 26 01:20:02 2011 |
rana | Update | Electronics | POX_11 debugging | The performance plots for |
|
|
4567
|
Mon Apr 25 22:38:49 2011 |
kiwamu | Update | LSC | prepration for DRMI : Y arm flashing | This
week is going to be a recycled Michelson |
|
|
4566
|
Mon Apr 25 12:55:35 2011 |
Alastair | Bureaucracy | Computers | wiki? |
|
|
|
4565
|
Mon Apr 25 12:55:19 2011 |
Jenne | Bureaucracy | Computers | wiki? |
|
|
|
4564
|
Mon Apr 25 11:58:37 2011 |
Jamie | Bureaucracy | Computers | wiki? |
|
|
|
4563
|
Mon Apr 25 11:23:41 2011 |
Alastair | Bureaucracy | Computers | wiki? | 40m wiki seems to have been down for quite
a while now but I can't see any info in the
elog about it. Is there some ongoing |
|
|
4562
|
Sun Apr 24 21:37:40 2011 |
kiwamu | Update | IOO | review of triple resonant EOM : model looks fine | To design a new resonant EOM box I started
reviewing the prototype that I've built.
As a part of reviewing I checked |
|
|
4561
|
Fri Apr 22 12:07:38 2011 |
josephb, steve | Update | CDS | Removed hanging D-sub to SCSI in 1X2 | Problem:
Way back, Jay had D-sub
to SCSI adapters made to adapt our existing
Sander box AA filters to the new SCSI based |
|
|
4560
|
Fri Apr 22 11:08:50 2011 |
kiwamu | Update | LSC | demod board AS11 : amplitude imbalance | Amplitude
imbalance between I and Q in a demod board, |
|
|
4559
|
Fri Apr 22 10:28:22 2011 |
rana | Update | RF System | RF Source Harmonics | You should be able to resolve the other harmonics
by [B][COLOR=blue]decreasing the IF BW or
RBW[/COLOR][/B] on the analyzer. Even though
|
|
|
4558
|
Fri Apr 22 09:25:43 2011 |
Suresh | Update | RF System | RF Source: Temperature sensor relocated | RF Amp operating temperature
Earlier measurement reported by Alberto
in LIGO-T10004-61-v1 based on the LM34 temperature |
|
|
4557
|
Fri Apr 22 09:05:53 2011 |
Suresh | Update | RF System | RF Source Harmonics |
As seen in the previous measurement the first
harmonic of both the 11 MHz and 55 MHz outputs |
|
|
4556
|
Fri Apr 22 02:10:53 2011 |
Zach | Update | elog | restarted | Restarted the elog with the script. |
|
|
4555
|
Thu Apr 21 21:46:22 2011 |
kiwamu | Update | LSC | demod board : new 90 deg splitter | A less
LO power dependence on the relative phase |
|
|
4554
|
Thu Apr 21 21:24:41 2011 |
kiwamu | Update | LSC | demod board : new 90 deg splitter | A
new 90 degree splitter, PSCQ-2-51W, has arrived
today and I installed it on a demod board |
|
|
4553
|
Thu Apr 21 15:20:46 2011 |
steve | Update | PEM | PSL enclosure work today |
|
|
|
4552
|
Thu Apr 21 15:03:29 2011 |
steve | Update | Computers | juction board finds home | The anti aliasing box was opened up at
the back to accommodate the junction board
and the SCSI cable towards the ADC. Aluminum |
|
|
4551
|
Thu Apr 21 14:39:43 2011 |
steve | Update | RF System | new strain relieved N connectors at AP | New right angle PVC, 2 x 2 x 1/4"
installed at the AP table to strain relief
the 1/4" spiral corrugated RF coaxes. |
|
|
4550
|
Thu Apr 21 08:26:42 2011 |
steve | Update | PEM | PSL enclosure work today | The east side window guides will
be replaced by one long U-channel. There
will be drilling into 2x2 steel frame. It |
|
|
4549
|
Wed Apr 20 23:20:49 2011 |
jamie | Summary | Computers | installation of CDS tools on pianosa | This is an overview of how I got (almost)
all the CDS tools running on pianosa, the
new Ubuntu 10.04 control room work station. |
|
|
4548
|
Wed Apr 20 22:29:07 2011 |
suresh | Update | RF System | Plan for LSC rack | The suggested layout of the 1Y2 Rack is
shown below.
To simplify the wiring, I have largely |
|
|
4547
|
Wed Apr 20 21:53:01 2011 |
Suresh | Configuration | RF System | RF system: Stray heliax cable | We found a stray unused heliax |
|
|
4546
|
Wed Apr 20 20:42:55 2011 |
kiwamu | Update | VIDEO | today's video session | [Steve / Suresh / Kiwamu]
90
% of unused video cables have been removed. |
|
|
4545
|
Wed Apr 20 11:02:18 2011 |
josephb | Update | CDS | MEDM screens and Front Ends updated to new Matrices | We simply didn't any matrices larger than
16x16. If we had, than that matrix would
not have worked properly since the beginning.
|
|
|
4544
|
Tue Apr 19 17:34:02 2011 |
Koji | Update | CDS | MEDM screens and Front Ends updated to new Matrices | Just a curiosity:
I just wonder how you have distingushed
the difference between _1 |
|
|
4543
|
Tue Apr 19 15:48:43 2011 |
josephb | Update | CDS | MEDM screens and Front Ends updated to new Matrices | Problem:
The original matrix
naming conventions for the front ends was |
|
|
4542
|
Mon Apr 18 21:14:53 2011 |
Jamie | Configuration | Computers | new control room machine: pianosa | Also, op440m's Sun monitor did not work well
with pianosa, so I'm lending pianosa my HP
monitor until we can get a suitable replacement. |
|
|
4541
|
Mon Apr 18 21:09:45 2011 |
Jamie | Configuration | Computers | new control room machine: pianosa | I've just installed the new control room
machine: "pianosa". It is
a replacement for the old sun machine "op440m" |
|
|
4540
|
Mon Apr 18 17:47:41 2011 |
kiwamu | Configuration | LSC | LSC rack's ADC cabling | To
understand the situation of the ADC cabling
at the LSC rack I looked around the rack |
|
|
4539
|
Mon Apr 18 14:11:44 2011 |
kiwamu | Update | LSC | RF status | We
will make them all green !!
|
|
|
4538
|
Mon Apr 18 13:05:57 2011 |
kiwamu | Summary | LSC | demod board modification | Here
is the idea how we upgrade the demodulation
boards. |
|
|
4537
|
Sat Apr 16 02:00:14 2011 |
rana | Update | LSC | 11MHz demod board : 90 degree splitter | One way to avoid some of the bad stuff
in there is to take the 1 dBm input and amplify
it to ~21 dBm before splitting and sending |
|
|
4536
|
Fri Apr 15 22:57:38 2011 |
Aidan, Jamie | Configuration | LSC | AS PD and Camera installed | AS port ITMX YAW range where AS beam
was visible = [-1.505, -1.225] - these extrema
put the beam just outside of some aperture |
|
|
4534
|
Fri Apr 15 22:54:20 2011 |
Aidan, Bryan | Update | Green Locking | Beat note amplitude on Vertex PD | I was investigating the beat note amplitude
on the vertex PD again yesterday. The incident
power on the PD was 150uW in the PSL green |
|
|
4533
|
Fri Apr 15 15:15:08 2011 |
kiwamu | Update | LSC | 11MHz demod board : 90 degree splitter | [Rana, Koji, Kiwamu]
Moreover
the amplitude of the I and Q signals are |
|
|
4532
|
Fri Apr 15 13:43:23 2011 |
Bryan | Configuration | Green Locking | I leave you with these messages... | Y-end PDH electronics. |
|
|
4531
|
Fri Apr 15 13:40:00 2011 |
Larisa Thorne | Update | Electronics | Low pass filter for X arm laser temperature control, second try | Plotting the data points yielded by the
spec analyzer of my first LPF yielded a result
that was not expected: the desired cutoff |
|
|
4530
|
Fri Apr 15 12:17:39 2011 |
kiwamu | Update | LSC | 11MHz demod board : funny I-Q phase | During checking
the 11MHz demod boards I found that the I-Q |
|
|
4529
|
Fri Apr 15 02:30:24 2011 |
Koji | HowTo | VIDEO | Video switching tip | I have made a small python script to handle
the video matrix.
It is too far from the perfection, |
|
|
4528
|
Fri Apr 15 02:18:50 2011 |
Koji | Update | LSC | Bunch of RF cables removed | While Kiwamu was working on the RF cabling
at the LSC rack, I removed 80% of SMA cables
which were not connected anywhere. |
|
|
4527
|
Fri Apr 15 02:17:18 2011 |
kiwamu | Update | LSC | Michelson locked | [Koji / Kiwamu]
The |
|
|
4526
|
Thu Apr 14 19:05:17 2011 |
Koji | Update | LSC | New (temporary) LSC screen | [Jenne Koji]
The PD signals are transmitted to
the suspension now. |
|
|
4525
|
Thu Apr 14 17:45:59 2011 |
Bryan | Configuration | Green Locking | I leave you with these messages... | OK…
the Y-arm may be locked with green light,
which was the goal, and this is all good |
|
|
4524
|
Thu Apr 14 12:57:15 2011 |
josephb | Update | CDS | RFM network happy again | [Joe, Alex]
Problem Symptoms:
There
were red lights on the status screen indicating |
|
|
4523
|
Thu Apr 14 01:03:43 2011 |
Koji | Update | LSC | LSC Campaign ~ Status | Target:
To lock the Michelson with the new RF/LSC
Status |
|
|
4522
|
Thu Apr 14 00:21:28 2011 |
Koji | Update | CDS | New C1LSC code running | [Jamie, Jenne, Koji]
We installed the new c1lsc and started
the process. |
|
|
4521
|
Wed Apr 13 23:32:07 2011 |
Aidan, Jamie | Configuration | LSC | AS PD and Camera installed | I spent some time tracking down the AS
beam which had vanished from the AP table.
Eventually, by dramatically mis-aligning |
|