ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
4385
|
Tue Mar 8 15:20:31 2011 |
kiwamu | Update | Green Locking | differential noise on Mar.8th | |
|
|
4386
|
Tue Mar 8 15:23:16 2011 |
steve | Update | PEM | clean room gloves | Ansell
AccuTech
91-300 clean |
|
|
4387
|
Tue Mar 8 15:33:09 2011 |
kiwamu | Summary | Green Locking | plan on Mar.8th |
|
|
|
4388
|
Tue Mar 8 16:59:47 2011 |
josephb | Update | CDS | Simulated Plant Work | The screens for the simplified c1spx model
have been updated. I re-introduced
the suspension point information into the |
|
|
4389
|
Wed Mar 9 04:46:13 2011 |
kiwamu | Update | Green Locking | more intensity noise measurement |
Here is a diagram for our intensity
noise coupling measurement. |
|
|
4390
|
Wed Mar 9 16:07:42 2011 |
kiwamu | Update | VIDEO | cable session | [Koji, Steve, Suresh, Kiwamu]
The following video cables have been
newly laid down : |
|
|
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 |
|
|
4392
|
Wed Mar 9 18:17:11 2011 |
kiwamu | Update | Green Locking | Intensity noise coupling | Here
is a new plot for the differential noise
measurement. I plot a noise contribution |
|
|
4393
|
Wed Mar 9 23:19:04 2011 |
kiwamu | Update | CDS | rebooted c1ioo | For
some reason the c1ioo machine suddenly died
just 30 miteus before. |
|
|
4394
|
Thu Mar 10 01:28:47 2011 |
joe, jamie, rana, chris | Summary | CDS | SimSuspension ! | Today was a banner day for |
|
|
4395
|
Thu Mar 10 01:31:37 2011 |
Kevin | Update | Electronics | AS55 Characterizations | I measured the transfer function, shot
noise, and dark spectrum of AS55.
From the shot noise measurement, |
|
|
4396
|
Thu Mar 10 13:44:56 2011 |
josephb | Update | CDS | Added digitization noise to the c1spy model for simulated ADCs/DACs | To simulate digitization noise, the easiest
way I found was to use the MathFunction block,
found in the CDS_PARTS model, under simLinkParts. |
|
|
4397
|
Thu Mar 10 14:06:54 2011 |
kiwamu | Update | Green Locking | Intensity noise limits the beatnote sensitivity | We are limited
by the intensity noise of the X arm transmitted |
|
|
4398
|
Thu Mar 10 14:22:58 2011 |
kiwamu | Update | Green Locking | Intensity noise limits the beatnote sensitivity | The next steps we should do are :
- to investigate
a cause of the intensity fluctuation
|
|
|
4399
|
Thu Mar 10 14:29:05 2011 |
Koji | Update | Green Locking | Intensity noise limits the beatnote sensitivity | We can modify the freq divider circuit
to make it a comparator.
|
|
|
4400
|
Thu Mar 10 14:30:53 2011 |
rana | Update | Green Locking | Intensity noise limits the beatnote sensitivity | There are 3 standard techniques to
reduce this effect:
1) Stabilize the end laser by sensing |
|
|
4401
|
Thu Mar 10 16:00:53 2011 |
Aidan, Joe | Update | Green Locking | Intensity stabilization loop using beatnote DC. | Aidan: Joe and I have added a channel that
takes the DC output from the vertex beatnote
PD and sends it, via RFM, to a DAC at the |
|
|
4402
|
Thu Mar 10 17:03:48 2011 |
Larisa Thorne | Configuration | Electronics | calculations for passive low pass filter on X arm | [Kiwamu, Larisa]
We want to increase gain in the lower |
|
|
4403
|
Thu Mar 10 21:45:34 2011 |
rana | Update | Green Locking | Intensity stabilization loop using beatnote DC. | Ridiculous
and hacky. Digital stabilization removed
as well as the old "leave a pile of |
|
|
4404
|
Fri Mar 11 11:33:24 2011 |
josephb | Update | CDS | Fixed mistake in Matrix of Filter banks naming convention | While fixing up some medm screens and getting
spectra of the simulated plant, I realized
that the naming convention for the Matrices |
|
|
4405
|
Fri Mar 11 16:30:42 2011 |
steve | Update | General | high speed servo unit is here | New
Focus Servo Controller has just arrived.
We have 25 days to evaluate this product. |
|
|
4406
|
Fri Mar 11 18:32:45 2011 |
josephb, Chris, Jamie | Update | CDS | Debugging simplant damping | The FM1 filter module change for XXSEN
was propagated to the ETMX suspension.
This was a change from a 30,100:3 with a |
|
|
4407
|
Sun Mar 13 00:00:58 2011 |
jzweizig, rana | Configuration | DAQ | NDS2 code change and restart | John has changed the NDS2 code and
restarted it on Mafalda. The issue is that
it goes off the rails everytime the DAQD |
|
|
4408
|
Sun Mar 13 04:00:53 2011 |
rana | Update | CDS | ETMY Sim work | I did some work on the ETMY |
|
|
4409
|
Sun Mar 13 16:46:48 2011 |
josephb | Update | CDS | ETMY Sim work | 4. The blue Output Filters section
has been changed to agree with the new filter
of matrices row, column labeling. My |
|
|
4410
|
Fri Mar 18 11:29:36 2011 |
josephb | Update | CDS | Minute trend issues | [Joe, Alex]
Steve pointed out to me today he
couldn't get trends for his PEM slow channels |
|
|
4411
|
Fri Mar 18 12:22:04 2011 |
kiwamu | Update | Green Locking | Y arm plan for today | Prior
to the works on the Y end setup I propose
to perform the temperature scan business |
|
|
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 |
|
|
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 |
|
|
4416
|
Fri Mar 18 17:55:58 2011 |
Suresh | Configuration | Green Locking | Work Plan for Y-end Aux laser installation | A rough
time-table and the various tasks are given
below: |
|
|
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. |
|
|
4419
|
Mon Mar 21 16:49:11 2011 |
kiwamu | Summary | Green Locking | plan for this week | - Plan for this
week |
|
|
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. |
|
|
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 |
|
|
4422
|
Tue Mar 22 00:03:29 2011 |
Bryan | Configuration | Green Locking | PSL vs Y arm laser temperature pairing | OK. Today we did the same type of
measurement for the Y arm laser as was done
for the X arm laser here: |
|
|
4423
|
Tue Mar 22 00:23:20 2011 |
Jenne | Configuration | Green Locking | PSL vs Y arm laser temperature pairing |
|
|
|
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) |
|
|
4425
|
Tue Mar 22 19:03:45 2011 |
Bryan | Configuration | Green Locking | PSL vs Y arm laser temperature pairing |
|
|
|
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. |
|
|
4430
|
Wed Mar 23 09:54:46 2011 |
steve | Omnistructure | Photos | LSC visitors | The 40m lab was visited by ~ 30 LSC
members the end of last week. |
|
|
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 |
|
|
4432
|
Wed Mar 23 12:40:22 2011 |
Chief Recycling Officer | HowTo | Environment | Recycle stuff! | The following is a message from the LIGO
40m Chief Recycling Officer:
|
|
|
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 |
|
|
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, |
|