| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
4413
|
Fri Mar 18 16:06:30 2011 |
kiwamu | Update | Green Locking | Re: Y arm plan for today | We use
Alberto's laser for the Y end Green Locking. |
|
|
4414
|
Fri Mar 18 16:31:11 2011 |
Suresh | Update | Green Locking | Re: Y arm plan for today | The
reason for using Alberto's laser is that
some amount of work has already gone into |
|
|
4415
|
Fri Mar 18 17:25:21 2011 |
josephb | Update | CDS | Lockins in c1sus update, suspension screens updated | I updated our lockin simulink pieces to
use the newer, more streamlined lockin piece
that is currently in CDS_PARTS (with new |
|
|
4417
|
Mon Mar 21 13:26:25 2011 |
Koji | Update | PSL | PMC Trans/RFPDDC | PMC TRANS/REFL on MEDM showed red values
for long time.
TRANS (a.k.a C1:PSL-PSL_TRANSPD) was |
|
|
4418
|
Mon Mar 21 16:31:02 2011 |
steve | Update | SAFETY | Bryan Barr received safety training | Bryan Barr is visiting us from Glasgow
for a month. He received 40m specific safety
training on Friday. |
|
|
4420
|
Mon Mar 21 18:34:10 2011 |
kiwamu | Update | Green Locking | added a new ADC channel on 1X9 | I added a new ADC channel for a DC signal
from the X end green PD. |
|
|
4424
|
Tue Mar 22 16:39:51 2011 |
kiwamu | Update | Green Locking | comaprator installed : 80 pm residual displacement | A
comparator has been installed before the
MFDs (mixer-based frequency discriminator) |
|
|
4426
|
Wed Mar 23 00:51:47 2011 |
kiwamu | Update | Green Locking | plan for tomorrow | -
Plan for tomorrow
* Video cable |
|
|
4427
|
Wed Mar 23 05:11:08 2011 |
kiwamu | Update | Green Locking | servo handig off | Succeeded
in handing off the servo from the green to |
|
|
4428
|
Wed Mar 23 08:50:36 2011 |
Aidan | Update | Green Locking | servo handig off | Nicely done!
|
|
|
4429
|
Wed Mar 23 09:48:20 2011 |
steve | Update | PSL | PSL enclosure: gets new window & laser | Solid door, numbered 4 at south west corner
of PSL enclosure was replaced by laser protective
window. |
|
|
4431
|
Wed Mar 23 10:34:17 2011 |
josephb | Update | CDS | Trend issue fixed | [Joe, Alex]
Yesterday during the day, Alex ran
a script to fix the time stamps in the trends |
|
|
4434
|
Wed Mar 23 16:06:20 2011 |
Larisa Thorne | Update | Electronics | Update on cable laying | [Steve, Suresh, Larisa]
The following cables were laid today:
ETMYT, ETMY, IFOPO, MC1, OMCR, AS Spare, |
|
|
4438
|
Thu Mar 24 13:56:05 2011 |
josephb | Update | elog | elog restarted at 1:55pm | Restarted elog. |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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. |
|
|
4451
|
Mon Mar 28 18:22:43 2011 |
kiwamu | Update | Green Locking | a mixer school | PLEASE DO
NOT DISMANTLE THE SETUP ! |
|
|
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 |
|
|
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 |
|
|
4454
|
Mon Mar 28 23:51:54 2011 |
Jenne | Update | PSL | New PMC Base Riser Design |
|
|
|
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 |
|
|
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
|
|
|
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 |
|
|
4458
|
Tue Mar 29 22:29:16 2011 |
kiwamu | Update | General | some tasks tomorrow | * Temporary strain relief for
the heliax cables on 1X2 (Steve) |
|
|
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 |
|
|
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. |
|
|
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 |
|
|
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 |
|
|
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. |
|
|
4482
|
Fri Apr 1 23:05:58 2011 |
kiwamu | Update | Green Locking | noise budget |
|
|
|
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 |
|
|
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. |
|
|
4492
|
Wed Apr 6 16:02:07 2011 |
Larisa Thorne | Update | Electronics | Cable laying...continued | [Steve, Kiwamu, Larisa]
Having finished laying new cable |
|
|
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 |
|
|
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 |
|
|
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: |
|
|
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. |
|
|
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 |
|
|
4508
|
Mon Apr 11 11:34:05 2011 |
Koji | Update | Electronics | New Green PD test1 |
|
|
|
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 |
|
|
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?). |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|