| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
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 |
|
|
4520
|
Wed Apr 13 16:56:08 2011 |
Bryan | Configuration | Green Locking | Y-ARM Green-Locked! | Locked!
The Y-arm can |
|
|
4519
|
Wed Apr 13 16:38:17 2011 |
Larisa Thorne | Update | Electronics | Video MUX camera/monitor check | [Kiwamu, Larisa]
The following Video MUX inputs(cameras) |
|
|
4518
|
Wed Apr 13 11:34:07 2011 |
josephb | Update | CDS | Fixed IFO_ALIGN.adl | Problem:
I switched the
ITMX and ITMY control channels yesterday, |
|
|
4517
|
Tue Apr 12 18:15:07 2011 |
kiwamu | Summary | IOO | RF combiner is more like attenuator |
I realized |
|
|
4516
|
Tue Apr 12 16:01:33 2011 |
josephb | Update | General | RFM errors | Problem:
Currently the c1scy,
c1mcs, and c1rfm models are reporting an
error with receiving some data sent over |
|
|
4515
|
Tue Apr 12 12:01:30 2011 |
josephb | Update | General | IFO controls, now with 10% less lying (ITMX/ITMY controls swapped) | The ITMX/ITMY control swap is complete.
The
steps from this
elog were followed. |
|
|
4514
|
Mon Apr 11 23:35:02 2011 |
rana | Update | RF System | Installed low pass filters in the demod boards | I am a little concerned about using these
low pass filters so close to the band edge.
Recall that there is no on-board preamp for |
|
|
4513
|
Mon Apr 11 21:13:15 2011 |
Koji | Update | Electronics | New Green PD test1 | Correction:
The (-) input has been decoupled
by the capacitor. So the series resistance |
|
|
4512
|
Mon Apr 11 20:03:05 2011 |
tara | Update | Electronics | TTFSS for 40m | I brought TTFSS set #7 to 40m and kept
it in the electronic cabinet.
note that Q4 transistor has not been |
|
|
4511
|
Mon Apr 11 19:09:59 2011 |
Suresh | Update | RF System | Installed low pass filters in the demod boards |
As part of the RF system upgrade
some of the demod boards in the lab were |
|
|
4510
|
Mon Apr 11 14:17:22 2011 |
josephb, jamie | Update | CDS | Frame wiper script installed | [Joe, Jamie, Alex]
Fixes:
I
asked Alex which cron to use (dcron? frcron?). |
|
|
4509
|
Mon Apr 11 13:30:04 2011 |
josephb, Jamie | Update | CDS | No Wiper script - Frames full over weekend | Problem:
The daqd
process was dying every minute or so when
it couldn't write frame. This was slowing |
|
|
4508
|
Mon Apr 11 11:34:05 2011 |
Koji | Update | Electronics | New Green PD test1 |
|
|
|
4507
|
Mon Apr 11 09:49:53 2011 |
rana | Update | Electronics | New Green PD test1 | Ooh. Can you explain the purpose
of the resistors which are connected to the
(+) inputs? It looks like some real electronics |
|
|
4506
|
Sun Apr 10 19:14:08 2011 |
Koji | Update | Green Locking | New Green PD test1 | I started to modify another green PD set.
It so far has the transimpedance
of 240 Ohm on CLC409 for the RF output. |
|
|
4505
|
Fri Apr 8 20:43:46 2011 |
kiwamu | Summary | IOO | RF combiner + resonant box : impedance and reflection coefficient | The
input impedance of the resonant box was measured
when an RF combiner was attached to the box. |
|
|
4504
|
Fri Apr 8 19:43:03 2011 |
kiwamu | Summary | IOO | RF combiner eases impedance mismatching | An RF combiner should |
|
|
4503
|
Fri Apr 8 01:05:45 2011 |
Suresh | Update | RF System | RF Source Harmonics |
The measured power levels of
the RF source harmonics are given below: |
|
|
4502
|
Thu Apr 7 21:58:57 2011 |
Aidan | Summary | Green Locking | Beat note amplitude | Having convinced myself that the green
Hartmut PD is giving an acceptable response
at RF frequencies I decided to double-check |
|
|
4501
|
Thu Apr 7 19:28:02 2011 |
Koji | Summary | Green Locking | (In)sanity check of Green PD - some inconsistencies | Responsivity of SGD-444A
|
|
|
4500
|
Thu Apr 7 16:09:17 2011 |
Aidan | Summary | Green Locking | (In)sanity check of Green PD - some inconsistencies | I think I had underestimated the responsivity
of the Silicon PD at 1064nm. The previous
value was based on a rough search online |
|
|
4499
|
Thu Apr 7 13:14:23 2011 |
josephb | Update | CDS | Proposed plan for ITMX/ITMY control switch | Problem:
The controls (fast
and slow both) think ITMX is ITMY and ITMY |
|
|
4498
|
Thu Apr 7 13:12:23 2011 |
Koji | HowTo | VIDEO | Video switching tip | Long time ago, I looked at the manual of
the video switcher.
|
|
|
4497
|
Thu Apr 7 11:51:13 2011 |
steve | Summary | SAFETY | new crane operator inaugurated |
|
|
|
4496
|
Thu Apr 7 11:38:56 2011 |
steve | Update | PSL | enclosure windows on the east side of the PSL | The PSL enclosure now have 4 windows on
each side. The bottom rail guides on the
east side will be replaced by one |
|
|
4495
|
Wed Apr 6 22:13:24 2011 |
Bryan | Configuration | Green Locking | Resonating green light! | Every so often things just work out. You
do the calculations, you put the lenses on
the bench, you manually adjust the pointing |
|
|
4494
|
Wed Apr 6 19:36:32 2011 |
Aidan | Summary | Green Locking | (In)sanity check of Green PD - some inconsistencies | I moved the Hartmut Green PD to the Jenne
laser bench to try to determine if the response
at RF was reasonable or somehow very much |
|
|
4493
|
Wed Apr 6 18:55:49 2011 |
Jamie, Larisa | Configuration | LSC | major AP table cleanup | We ripped out all of the old AS, PLL, and
REFL paths, green, orange, and cyan respectively
on the old |
|
|
4492
|
Wed Apr 6 16:02:07 2011 |
Larisa Thorne | Update | Electronics | Cable laying...continued | [Steve, Kiwamu, Larisa]
Having finished laying new cable |
|
|
4491
|
Wed Apr 6 02:41:01 2011 |
kiwamu | Update | Green Locking | noise budget : some more noise | It turned out that the dark noise from
the beat PD and the shot noise on the beat
PD was overestimated. |
|
|
4490
|
Tue Apr 5 21:20:11 2011 |
Koji | Summary | Green Locking | X-arm cavity locked with LB1005 servo box | Last Thursday, I tested Newport
Servo Controller LB1005 with the X_arm
green PDH servo. |
|
|
4489
|
Tue Apr 5 19:54:39 2011 |
Koji | Summary | Green Locking | Hamamatsu S3399 test | Since last Friday I have been testing the
broadband RF photodetector in order to
figure out the capability of S3399 with the |
|
|
4488
|
Tue Apr 5 17:31:59 2011 |
steve | Summary | General | new laser pointers |
|
|
|
4487
|
Tue Apr 5 17:04:36 2011 |
steve | Summary | SAFETY | cranes inspected and load tested | Mike Caton of Konecranes inspected and
loadtested all 3 of the 40m cranes
at max reach trolley positions with 1 ton. |
|
|
4486
|
Mon Apr 4 18:58:44 2011 |
Bryan | Configuration | Green Locking | A beam of purest green | We now have green light at the Y end.
The set-up (with careful instructions |
|
|
4485
|
Mon Apr 4 14:20:32 2011 |
Bryan | Configuration | Green Locking | The wonderful world of mode-matching | |
|
|
4484
|
Mon Apr 4 11:52:13 2011 |
Jenne | Update | PEM | STS2s unpacked | I unpacked the STS2 seismometers that we
borrowed from LLO. They are sitting
underneath the Xarm, in the middle of the |
|
|
4483
|
Fri Apr 1 23:49:24 2011 |
kiwamu | Summary | Green Locking | two states in green beat-note | According
to the measurement done by Aidan and me,
there are two beat-note state. |
|
|
4482
|
Fri Apr 1 23:05:58 2011 |
kiwamu | Update | Green Locking | noise budget |
|
|
|
4481
|
Fri Apr 1 18:54:41 2011 |
Bryan | Configuration | Green Locking | Y end doubling oven | The doubling oven is now ready to go for
the Y arm. The PPKTP crystal is mounted in
the oven: |
|
|
4480
|
Thu Mar 31 20:46:11 2011 |
Aidan | Summary | Green Locking | Green beat note PD DC response | I measured the DC response of the Green
PD
|
|
|
4479
|
Thu Mar 31 20:37:10 2011 |
Aidan | Summary | Green Locking | RF amplitude source | I gutted one of the $2 red laser
pointers to build a laser source whose amplitude
we could modulate at RF frequencies. Basically, |
|
|
4478
|
Thu Mar 31 19:58:11 2011 |
kiwamu | Update | CDS | c1iscex crashed | After
I did several things to add new DAQ channels
on c1iscex it suddenly became out of network. |
|