| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
4254
|
Sat Feb 5 23:03:04 2011 |
rana, koji | Summary | Electronics | Analog Frequency Discriminator: splitter + mixer + long cable | This diagram shows the setup |
|
|
4259
|
Tue Feb 8 10:23:02 2011 |
Aidan | Summary | Green Locking | Digital Frequency Discriminator - reference |
Here's the reference for the self-reference
frequency detection idea. See Figure 2. |
|
|
4260
|
Tue Feb 8 13:26:11 2011 |
Aidan | Summary | Green Locking | Temperature dependence of phase change of green on reflection | I did a quick back of the envelope
calculation of the expected green phase change
on reflection from the aLIGO ITM. |
|
|
4293
|
Mon Feb 14 23:29:04 2011 |
rana | Summary | SUS | ETMX Fitlers moved around | All of the SUS used to have only 1 filter
module for SIDE. They now have 3 filter modules
for SIDE just like the other DOFs. |
|
|
4294
|
Tue Feb 15 02:13:16 2011 |
kiwamu | Summary | ASC | a daytime task : small signals on ETMX OL | Rana
and I found that the QPD for the optical
lever at X end are showing small signals. |
|
|
4299
|
Tue Feb 15 11:53:02 2011 |
kiwamu | Summary | General | today's missions | I
think this week is going to be an "alignment
week". |
|
|
4310
|
Thu Feb 17 00:43:13 2011 |
kiwamu | Summary | General | to do list for tomorrow | Let's
share our tasks ! |
|
|
4317
|
Thu Feb 17 22:51:04 2011 |
josephb, valera | Summary | | dither alignment model | We made a model for the dither angular
stabilization system c1ass.mdl. The attached
file shows the diagram. |
|
|
4322
|
Fri Feb 18 00:35:21 2011 |
kiwamu | Summary | General | to do list for Feb. 18th | DAYTIME
- more |
|
|
4326
|
Fri Feb 18 18:46:08 2011 |
kiwamu | Summary | SUS | f2p done on ETMX and ITMX |
The f2p measurements are done on |
|
|
4327
|
Fri Feb 18 20:06:59 2011 |
kiwamu | Summary | SUS | check f2p function on ETMX | The
plot below shows how the f2p filters work.
|
|
|
4328
|
Fri Feb 18 20:17:07 2011 |
Joonho | Summary | Electronics | Isolation of Voltage regulator | Today I was working on RF distribution
box.
So far I almost finished to electronically |
|
|
4329
|
Sat Feb 19 01:58:20 2011 |
rana | Summary | Electronics | Low Noise BJT Pre-Amp | Frank put his low noise preamp info here.
I suggest that we build these (using |
|
|
4333
|
Mon Feb 21 17:29:57 2011 |
rana | Summary | IOO | Myterious data loss: FB needs investigation | Looks like there was a mysterious loss
of data overnight; since there's nothing
in the elog I assume that its some kind of |
|
|
4334
|
Mon Feb 21 23:00:06 2011 |
Zach | Summary | elog | restarted | again |
|
|
4343
|
Wed Feb 23 10:37:02 2011 |
josephb | Summary | IOO | Myterious data loss: FB needs investigation | Friday:
In addition to the other fixes, Alex
rebuilt the daqd process. I failed to |
|
|
4357
|
Fri Feb 25 13:28:14 2011 |
kiwamu | Summary | General | to do list | Because it maybe useful to share
this kind of information among us, I just |
|
|
4359
|
Fri Feb 25 14:50:16 2011 |
Koji | Summary | General | to do list | - Put priority on the list
- Put names on the items
- Where is the CDS TO DO ==> Joe |
|
|
4364
|
Mon Feb 28 11:22:40 2011 |
josephb | Summary | General | to do list |
|
|
|
4371
|
Wed Mar 2 22:57:57 2011 |
suresh | Summary | General | Stuff from LLO | Here is a partial list of stuff which is
being packed at LLO to be shipped to CIT.
The electronics ckt boards are yet to be |
|
|
4375
|
Thu Mar 3 20:30:03 2011 |
rana | Summary | PSL | PMC Sweeps @ different input power levels to measure the Finesse | Its been well
noted in the past that sweeping the PMC
at high power leads to a distortion of the |
|
|
4381
|
Mon Mar 7 17:58:14 2011 |
suresh | Summary | General | Stuff from LLO |
Here is the updated list. These lists were
used as packing lists and therefore are organised |
|
|
4382
|
Mon Mar 7 18:20:01 2011 |
kiwamu | Summary | Green Locking | plans |
This
week's goal is to investigate the source
of the differential noise and to lower it. |
|
|
4387
|
Tue Mar 8 15:33:09 2011 |
kiwamu | Summary | Green Locking | plan on Mar.8th |
|
|
|
4391
|
Wed Mar 9 17:29:11 2011 |
steve | Summary | VAC | single O-ring protection | We have one single O-ring on the 40m vacuum
envelope. It is on the OOC west side, facing
the AP table. This O-ring has to be protected |
|
|
4394
|
Thu Mar 10 01:28:47 2011 |
joe, jamie, rana, chris | Summary | CDS | SimSuspension ! | Today was a banner day for |
|
|
4412
|
Fri Mar 18 14:18:00 2011 |
kiwamu | Summary | General | new laser pointers | Just for a record. We got 4 new laser
pointers (2 greens, 1 blue, and 1 green and |
|
|
4419
|
Mon Mar 21 16:49:11 2011 |
kiwamu | Summary | Green Locking | plan for this week | - Plan for this
week |
|
|
4421
|
Tue Mar 22 00:01:25 2011 |
kiwamu | Summary | Green Locking | plan for daytime tasks | Some
tasks for the daytime tomorrow.
* Beam profile measurements |
|
|
4433
|
Wed Mar 23 14:19:35 2011 |
Koji | Summary | General | Grand Plan | This is the grand plan we talked about
in the beginning of the meeting.
(Kiwamu) X-end Green cleaning |
|
|
4435
|
Wed Mar 23 19:16:17 2011 |
Aidan | Summary | Green Locking | Y-END green equipment is all available | With the exception of a 2" mirror
mount, I've confirmed that we have everything
for the Y-end green production and mode-matching. |
|
|
4436
|
Thu Mar 24 01:16:19 2011 |
Suresh | Summary | Green Locking | Y-END green equipment is all available | There was a 2" mirror mount among the spares
on the PSL table. It has a window LW-3-2050
UV mounted in it. I
|
|
|
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. |
|
|
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, |
|
|
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
|
|
|
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. |
|
|
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. |
|
|
4488
|
Tue Apr 5 17:31:59 2011 |
steve | Summary | General | new laser pointers |
|
|
|
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 |
|
|
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. |
|
|
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 |
|
|
4497
|
Thu Apr 7 11:51:13 2011 |
steve | Summary | SAFETY | new crane operator inaugurated |
|
|
|
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 |
|
|
4501
|
Thu Apr 7 19:28:02 2011 |
Koji | Summary | Green Locking | (In)sanity check of Green PD - some inconsistencies | Responsivity of SGD-444A
|
|
|
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 |
|
|
4504
|
Fri Apr 8 19:43:03 2011 |
kiwamu | Summary | IOO | RF combiner eases impedance mismatching | An RF combiner should |
|
|
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. |
|
|
4517
|
Tue Apr 12 18:15:07 2011 |
kiwamu | Summary | IOO | RF combiner is more like attenuator |
I realized |
|
|
4538
|
Mon Apr 18 13:05:57 2011 |
kiwamu | Summary | LSC | demod board modification | Here
is the idea how we upgrade the demodulation
boards. |
|
|
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. |
|