ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
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. |
|
|
4477
|
Thu Mar 31 15:23:14 2011 |
Bryan | Configuration | Green Locking | The wonderful world of mode-matching |
|
|
|
4476
|
Thu Mar 31 14:10:00 2011 |
Bryan | Configuration | Green Locking | The wonderful world of mode-matching |
|
|
|
4475
|
Thu Mar 31 11:30:51 2011 |
steve | Configuration | General | strain relieved rf cables | I strain relieved RF cables labeled 33
MHZ LO and 166 MHZ to EOM at 1X2 This
is a temporary setup for the 11 MHZ |
|
|
4474
|
Thu Mar 31 08:31:44 2011 |
Suresh | Update | VIDEO | Cable laying...continued | The video work has crossed a milestone.
Kiwamu and Steve have shifted the
three quads from the control room to |
|
|
4473
|
Thu Mar 31 02:59:49 2011 |
Koji | Configuration | Green Locking | The wonderful world of mode-matching | I went through the entries.
1. Give us a photo of the day. i.e.
Faraday, tilted lens, etc... |
|
|
4472
|
Wed Mar 30 21:46:10 2011 |
Aidan, Kiwamu | Update | Green Locking | States of the Green beat note | The attached table shows the amplitude
of the green beat note when the end laser
was in various states. We can increase the |
|
|
4471
|
Wed Mar 30 21:43:31 2011 |
Aidan, Kiwamu | Summary | Green Locking | Calculation of the green contrast on the RF PD | Skip to final thought ...
Kiwamu and I have set about measuring
the contrast of the signal on the RF PD. |
|
|
4470
|
Wed Mar 30 21:21:15 2011 |
Bryan | Configuration | Green Locking | The wonderful world of mode-matching | Step 4: Matching into |
|
|
4469
|
Wed Mar 30 20:50:43 2011 |
Bryan | Configuration | Green Locking | The wonderful world of mode-matching | Step |
|
|
4468
|
Wed Mar 30 20:31:30 2011 |
Bryan | Configuration | Green Locking | The wonderful world of mode-matching | Step |
|
|
4467
|
Wed Mar 30 20:14:17 2011 |
Bryan | Configuration | Green Locking | The wonderful world of mode-matching | Additional: |
|
|
4466
|
Wed Mar 30 20:08:34 2011 |
Bryan | Configuration | Green Locking | The wonderful world of mode-matching | Step 2: Getting the beam |
|
|
4465
|
Wed Mar 30 19:54:19 2011 |
Bryan | Configuration | Green Locking | The wonderful world of mode-matching | |
|
|
4464
|
Wed Mar 30 19:43:33 2011 |
Bryan | Configuration | Green Locking | The wonderful world of mode-matching | Right. I've got a whole load of info and
data and assorted musings I've been saving
up and cogitating upon before dumping it |
|
|
4463
|
Wed Mar 30 18:50:57 2011 |
Koji | Configuration | Computer Scripts / Programs | Added a sitemap alias | I thought that "m40m" was the
traditional alias for the sitemap...
rossa:~>alias |
|
|
4462
|
Wed Mar 30 17:01:08 2011 |
Larisa Thorne | Update | VIDEO | Cable laying...continued | [Steve, Suresh, Kiwamu, Larisa]
Only the PRM/BS cable was laid today. |
|
|
4461
|
Wed Mar 30 16:57:13 2011 |
kiwamu | Update | General | turned off c1aux | [Steve / Kiwamu]
As a part of the video cable
session, we reconnected some power cords |
|