| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
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 |
|
|
4460
|
Wed Mar 30 16:32:29 2011 |
Aidan | Configuration | Computer Scripts / Programs | Added a sitemap alias | I added an alias to the sitemap MEDM screen
in /cvs/cds/caltech/target/cshrc.40m
Now you can enjoy launching sitemap |
|
|
4459
|
Wed Mar 30 02:55:02 2011 |
Suresh | Configuration | Electronics | RF System : Status and Plans | I have prepared several diagrams outlining
the current state of the RF System.
These are uploaded into the svn40m |
|
|
4458
|
Tue Mar 29 22:29:16 2011 |
kiwamu | Update | General | some tasks tomorrow | * Temporary strain relief for
the heliax cables on 1X2 (Steve) |
|
|
4457
|
Tue Mar 29 15:50:21 2011 |
Koji | Update | Electronics | Low pass filter for X arm laser temperature control | For bode plot:
USE LOG-LOG plot for the amplitude |
|
|
4456
|
Tue Mar 29 15:01:58 2011 |
Larisa Thorne | Update | Electronics | Low pass filter for X arm laser temperature control | This is the continuation of http://nodus.ligo.caltech.edu:8080/40m/4402
|
|
|
4455
|
Tue Mar 29 00:00:55 2011 |
Koji | Update | IOO | Fixing MC/Freq Divider Box | This is the log of the work on Wednesday
23rd.
1. Power Supply of the freq divider |
|
|
4454
|
Mon Mar 28 23:51:54 2011 |
Jenne | Update | PSL | New PMC Base Riser Design |
|
|
|
4453
|
Mon Mar 28 22:56:14 2011 |
rana | Update | PSL | New PMC Base Riser Design | Its going to need some kind of way to locate
the PMC on the top. In the previous design,
we had the 3 balls to decouple the body from |
|
|
4452
|
Mon Mar 28 21:12:14 2011 |
Jenne | Update | PSL | New PMC Base Riser Design | I (think) I have finished the new PMC base
riser. The eDrawing of it (so you can
view it on any computer) has been uploaded |
|
|
4451
|
Mon Mar 28 18:22:43 2011 |
kiwamu | Update | Green Locking | a mixer school | PLEASE DO
NOT DISMANTLE THE SETUP ! |
|
|
4450
|
Mon Mar 28 18:13:32 2011 |
rana | Update | Green Locking | a mixer school | Using 2 dBm for a Level 7 mixer is so bogus,
that I will dismantle this as soon as I come
over. |
|
|
4449
|
Mon Mar 28 17:06:15 2011 |
kiwamu | Update | Green Locking | a mixer school | In
the last week Matt and I modified the MFD |
|
|
4448
|
Mon Mar 28 16:24:35 2011 |
kiwamu | Update | Green Locking | power budget on PSL table | I measured some laser powers
associated with the beat-note detection system |
|
|
4447
|
Mon Mar 28 16:19:23 2011 |
steve | Frogs | Photos | visithing 5th graders | Suresh is captivating his audience with
gravity waves on last Friday, March 25 |
|
|
4446
|
Mon Mar 28 15:49:18 2011 |
josephb | Update | CDS | Lessons from LST | [Koji,Joe]
PART 1:
Koji was unable to build his c1lst |
|
|
4445
|
Mon Mar 28 15:18:04 2011 |
josephb | Update | CDS | CDS updates on Friday | Last Friday, we discovered a bug in the
RCG where the delay part was not actually
delaying. We reported this to Alex |
|
|
4444
|
Fri Mar 25 11:16:19 2011 |
josephb | Frogs | Green Locking | digital frequency counting | I modified
the c1gfd.mdl simulink model. I made
a backup as c1gfd_20110325.mdl. |
|
|
4443
|
Fri Mar 25 08:58:38 2011 |
Aidan | Update | Treasure | Cleared stuff off SP table | I tidied up some of the stuff that was
on the SP table. The ISS box that has been
sitting on there for months is now underneath |
|
|
4442
|
Fri Mar 25 01:27:29 2011 |
mevans | Frogs | Green Locking | digital frequency counting | Today we tried the Schmitt trigger DFD,
and while it works it does not improve the
noise performance. At least part of |
|
|
4441
|
Thu Mar 24 19:48:13 2011 |
Aidan, Kiwamu | Update | Green Locking | Designs for permanent electronics for ALS | Kiwamu and I looked at all the electronics
that are currently in place for the green
locking on the X-arm and have made a set |
|
|
4440
|
Thu Mar 24 16:33:32 2011 |
Bryan | Configuration | Green Locking | PSL vs Y arm laser temperature pairing | X_arm and Y_arm vs PSL |
|