ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
9691
|
Wed Mar 5 11:33:10 2014 |
Koji | Summary | LSC | 2 arm ALS->LSC transition - road map | Step by step description of transition
from 2arm ALS to Common/Differential LSC
for FPMI |
|
9690
|
Wed Mar 5 09:52:31 2014 |
Jenne | Update | SUS | Oplev Tuning - Cartoon cost function | Not a whiteboard, but here's a cartoon
of my oplev cost function cartoon.
For the "maximize this area" and |
|
9689
|
Tue Mar 4 17:07:27 2014 |
Steve | Update | PEM | floor cleaning under racks |
|
|
9688
|
Mon Mar 3 23:16:06 2014 |
rana | Update | LSC | Y Arm Loop Shape found to be weird: changed now | I was getting the Y Arm ready for
Eric Q's loss measurements and so I looked
at the noise and loop shape. The loop shape |
  |
9687
|
Mon Mar 3 22:21:43 2014 |
Koji | Summary | LSC | PRMIsb locked with REFL165I&Q | Successful
PRMIsb locking with REFL165I/Q
My |
|
9686
|
Mon Mar 3 21:50:35 2014 |
Jenne | Update | Computer Scripts / Programs | Dropbox installed on Workstations | I have installed Dropbox on the 40m workstations,
using the foteee account.
I put it in /users/Dropbox. |
|
9685
|
Mon Mar 3 17:35:10 2014 |
Koji | Update | LSC | Various demod phase measurement | I wanted to check how the refl signals
looked like.
I decided to measure the demod phase |
|
9684
|
Mon Mar 3 11:55:39 2014 |
Koji | Update | CDS | fb timing was off | We need to correctly setup crontab or rc.local
for the frontend machines. |
|
9683
|
Mon Mar 3 10:42:53 2014 |
Jenne | Update | CDS | fb timing was off | ...yet again.
lsc and sus needed mxstream restarts
after I restarted the ntp on fb. |
|
9682
|
Thu Feb 27 22:25:29 2014 |
rana | Update | SUS | Oplev Tuning Party - round 1 commentary | in order to Win in Loop Tuning,
you must draw a |
|
9681
|
Thu Feb 27 13:11:13 2014 |
steve | Update | safety | safety audit correction |
|
 |
9680
|
Thu Feb 27 01:02:57 2014 |
Jenne | Update | SUS | Oplev Tuning Party - round 1 | [Jenne, Vivien]
We
had an oplev tuning party this afternoon. |
|
9679
|
Wed Feb 26 23:14:07 2014 |
Jenne | Update | CDS | fb timing was off | ....fb timing issue happened again.
I thought that it was the thing that
Koji and I saw the other day, where it was |
|
9678
|
Wed Feb 26 10:08:14 2014 |
Steve | Update | IOO | IOO trend |
The MC is happy |
|
9677
|
Wed Feb 26 02:20:35 2014 |
Jenne | Update | IOO | MC unhappy | I've asked Manasa and Q to have a look
at the MC in the morning. Rana and
I have found it to be slightly uncooperative |
|
9676
|
Wed Feb 26 01:49:08 2014 |
Jenne | Update | LSC | Changing PRCL offset changes REFL 165 degeneracy | I have measured the sensing matrix at a
variety of PRCL offset values.
|
 |
9675
|
Tue Feb 25 23:38:05 2014 |
rana, jenne | Update | PEM | GUR1 Z channel excess noise: oscillating Z channel | Last night we noticed an excess in the
GUR1Z seis BLRMS on the StripTool. It was
in the 0.1 - 0.3 Hz band. The rumor in the |
|
9674
|
Tue Feb 25 18:16:22 2014 |
Jenne | Summary | LSC | Even more violin filters | A new violin mode at 1303 Hz was ringing
up this afternoon. Rana and I added
a notch for this. |
|
9673
|
Tue Feb 25 17:27:41 2014 |
Jenne | Update | LSC | REFL signals calibrated | I have recalibrated the REFL signals.
I first adjusted the demod phases
until the I-signals lined up with the I-phase |
 |
9672
|
Tue Feb 25 16:54:57 2014 |
steve | Update | safety | safety audit 2014 |
We had our annual safety inspection
today. |
|
9671
|
Tue Feb 25 16:07:33 2014 |
ericq | Update | LSC | Changing PRCL offset changes REFL 165 degeneracy | And glossing over the MICH offset,
here's the PRC offset plots in displacement,
rather than radians. |
 |
9670
|
Tue Feb 25 14:48:49 2014 |
ericq | Update | LSC | Changing PRCL offset changes REFL 165 degeneracy | After speaking with Jenne and Gabriele,
I did a little bit of simulating based on
my earlier code that looked at the angle |
 |
9669
|
Tue Feb 25 02:46:38 2014 |
rana, jenne | Update | LSC | Changing PRCL offset changes REFL 165 degeneracy | [Jenne, Rana]
We put offsets in the PRCL and MICH
loops, and measured sensing matrices for |
|
9668
|
Tue Feb 25 00:00:01 2014 |
rana, jenne | Update | LSC | reasons that the REFL signals may be degenerate now | We're exploring some effects which may
give some funny macroscopic detuning and
cause a near phase degeneracy in the REFL |
|
9667
|
Mon Feb 24 23:43:10 2014 |
rana | Summary | General | ToDo | 1) Fixup REFL165: remove ND filters, get
box for PD, dump diode reflections, put less
light on diode, change DC transimpedance |
|
9666
|
Mon Feb 24 17:59:31 2014 |
RANA | Update | Electronics | Measured REFL165 demod board |
Demod boards should be at 90
deg, not 82.7 or 12 or |
|
9665
|
Mon Feb 24 17:21:42 2014 |
Steve | Update | Green Locking | green fiber status today |
|
6x |
9664
|
Mon Feb 24 16:26:14 2014 |
Jenne | Update | CDS | NTP fell out of sync on front end machines - fixed | [Koji, Jenne]
Koji noticed that the time on the
front-end detail screens was not correct, |
|
9663
|
Mon Feb 24 15:25:29 2014 |
Jenne | Update | CDS | Computer weirdness with c1lsc machine | The LSC machine isn't any better, and now
c1sus is showing the same symptoms.
Lame. |
|
9662
|
Mon Feb 24 13:40:13 2014 |
Jenne | Update | CDS | Computer weirdness with c1lsc machine | I noticed that the fb lights on all of
the models on the c1lsc machine are red,
and that even though the MC was locked, there |
|
9661
|
Mon Feb 24 13:21:00 2014 |
Jenne | Update | Electronics | Measured REFL165 demod board | I measured the REFL 165 demod board's
I/Q separation.
Our 11MHz signal is currently 11.066092 |
|
9660
|
Fri Feb 21 12:45:57 2014 |
ericq | Update | LSC | Equivalent Displacement Noise from QPD Dark Noise in SQRTINV | EQ UPDATE: Measured it wrong the first
time, fixed now.
I measured the spectra of the SQRTINV |
 |
9659
|
Wed Feb 19 22:47:26 2014 |
Jenne | Update | LSC | ALS locked using LSC model, Common & Diff transitioned to IR transmission signals | [Jenne, Koji, Manasa, EricQ]
Today
we successfully locked the ALS using the |
 |
9658
|
Wed Feb 19 18:21:33 2014 |
manasa | Update | LSC | Scripts for ALS modified |
|
|
9657
|
Wed Feb 19 16:42:08 2014 |
ericq | Update | LSC | Some Simulation Efforts | Disregard previous
ELOGs, I had the PRC locked on carrier |
 |
9656
|
Wed Feb 19 14:14:46 2014 |
ericq | Update | LSC | Some Simulation Efforts | Q EDIT: THIS
IS WRONG. I LOCKED PRC ON THE CARRIER
Koji
noted oddities in the sensing matrix results |
  |
9655
|
Wed Feb 19 11:45:12 2014 |
Jenne | Update | LSC | Scripts for ALS being modified | We
need to change several scripts for use with
the new ALS-in-the-LSC paradigm: |
|
9654
|
Wed Feb 19 11:00:16 2014 |
ericq | Update | LSC | Some Simulation Efforts | Q EDIT: THIS
IS WRONG. I LOCKED PRC ON THE CARRIER
As
Koji measured the other day: MICH and |
   |
9653
|
Wed Feb 19 08:07:01 2014 |
steve | Update | safety | annual laser safety glasses check |
All 40m laser safety glasses
are cleaned and measured this morning. |
 |
9652
|
Wed Feb 19 03:07:22 2014 |
Jenne | Update | LSC | ALS locked with LSC! | No more progress tonight.
I am still unable to lock the ALS using the
regular LSC filters. I went back to |
|
9651
|
Wed Feb 19 01:33:03 2014 |
Jenne | Update | LSC | ALS locked with LSC! | I am also not able to lock the ALS using
the 'regular' LSC filters. To figure
out what filters were doing what, I made |
  |
9650
|
Wed Feb 19 00:35:23 2014 |
Koji | Update | LSC | ALS locked with LSC! | Great. I indeed disabled all of the triggers
and the normalization during my trial but
in vain. |
|
9649
|
Tue Feb 18 23:55:33 2014 |
Jenne | Update | LSC | ALS locked with LSC! | I'm really excited, so I'm posting this,
even though I'm still working:
|
|
9648
|
Tue Feb 18 23:27:14 2014 |
Jenne | Update | LSC | ALS not locking with LSC | It looks like its somehow a discrepancy
between the TFs of each error signal, because
features are similar, and present, in both |
|
9647
|
Tue Feb 18 20:31:29 2014 |
Koji | Update | LSC | ALS not locking with LSC | Hmm. Wierd. Can you look at the TFs between
ETMX-EXC and the error signals so that we
can identify which one has these structures. |
|
9646
|
Tue Feb 18 18:52:08 2014 |
Jenne | Update | LSC | ALS not locking with LSC | Koji mentioned to me (and elogged) that
he was unsuccessful locking the ALS using
the LSC servos. He suggested I look |
   |
9645
|
Tue Feb 18 14:28:15 2014 |
Jenne | Update | IOO | MC unstable - centering spots helped | As we've been seeing a bit lately, the
MC will be locked happily for several hours,
but then it will start misbehaving. |
|
9644
|
Tue Feb 18 10:38:55 2014 |
Steve | Update | VAC | RGA scan at day 13 | All normal.
|
 |
9643
|
Tue Feb 18 10:10:07 2014 |
Steve | Update | PEM | floor cleaning under racks |
|
|
9642
|
Mon Feb 17 20:35:19 2014 |
ericq | Update | Electronics | Transmon QPD whitening | My apologies for all of that crap I left
at the Y-end... I cleaned the rest of it
up today. |
 |