| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
8760
|
Wed Jun 26 23:32:15 2013 |
Manasa | Update | Green Locking | c1als model edited | I have modified the ALS model to now include
PHASE_OUT calibration for both X and Y. MEDM
screen has not been edited to include these |
|
|
8761
|
Thu Jun 27 02:44:33 2013 |
rana | Update | Green Locking | c1als model edited | Could be that this is OK, but it
doesn't yet make sense to me. Can you please
explain in words how this manages to apply |
|
|
8768
|
Thu Jun 27 17:41:08 2013 |
Annalisa | Update | Green Locking | ETMY -beat note found! |
Y |
|
|
8769
|
Thu Jun 27 17:49:17 2013 |
manasa | Update | Green Locking | c1als model edited |
|
|
|
8789
|
Tue Jul 2 00:25:14 2013 |
gautam | Update | Green Locking | Universal PDH box tuning | [Koji, Annalisa, Gautam]
Annalisa noticed that over the weekend
the Y-arm green PDH was locked to a sideband, |
|
|
8792
|
Wed Jul 3 01:49:46 2013 |
Annalisa | Update | Green Locking | ALS servo configuration | [Koji, Annalisa, Manasa]
Today we worked on the ALS servo
stabilization for the Y arm. |
|
|
8793
|
Wed Jul 3 03:06:29 2013 |
Annalisa | Update | Green Locking | ALS servo configuration |
I realized that I cannot open the
attached plots. I'll fix them tomorrow. |
|
|
8807
|
Mon Jul 8 21:46:31 2013 |
manasa | Update | Green Locking | Beatbox | [Koji, Manasa]
I wanted to investigate on the ALS
electronics(in particular the beatbox and |
|
|
8813
|
Tue Jul 9 17:03:06 2013 |
Steve | Update | Green Locking | fiber layed for Y arm | Alex, Gautam and Steve,
Single
mode fiber 50m long is layed out into |
|
|
8817
|
Wed Jul 10 01:27:44 2013 |
gautam | Update | Green Locking | Y-end Green PDH open-loop transfer function | [Annalisa, gautam]
Summary:
We have measured the open-loop transfer |
|
|
8818
|
Wed Jul 10 02:10:41 2013 |
manasa | Update | Green Locking | Beatbox gets a makeover |
|
|
|
8819
|
Wed Jul 10 02:28:04 2013 |
Annalisa | Update | Green Locking | Beat notes lost! | [Manasa, Jenne, Annalisa]
I was going to find the beat note
to start the cavity scan, but I couldn't. |
|
|
8820
|
Wed Jul 10 11:27:02 2013 |
manasa | Update | Green Locking | X arm beatnote found | I found the beat note for X arm. I did
not change anything this morning (to the
best of my knowledge). Hooking up the spectrum |
|
|
8821
|
Wed Jul 10 11:44:02 2013 |
Annalisa | Update | Green Locking | Y beat note found! | I found the beat note for the Y arm. Nothing
was changed with respect to yesterday night,
but the beat is back! |
|
|
8822
|
Wed Jul 10 14:49:00 2013 |
Steve | Update | Green Locking | more fiber protective tubing layed |
|
|
|
8824
|
Thu Jul 11 00:30:27 2013 |
manasa | Update | Green Locking | X arm ALS post-beatbox makeover | I ran a series of diagnostics on the X
arm ALS to look at how the beatbox behaves
after the makeover. |
|
|
8831
|
Thu Jul 11 14:38:38 2013 |
Annalisa | Update | Green Locking | Y arm cavity scan | Yesterday I did a cavity scan with IR while
holding the Yarm with green.
ALS |
|
|
8841
|
Fri Jul 12 23:13:32 2013 |
manasa | Update | Green Locking | ALS sensor noise | [Annalisa, Koji, Manasa]
In order to improve the ALS stability |
|
|
8842
|
Sat Jul 13 03:27:20 2013 |
Annalisa | Update | Green Locking | Y arm caity scan | I started doing a scan of the Y arm cavity
with IR with ALS enabled.
ALS |
|
|
8844
|
Sun Jul 14 18:19:00 2013 |
Annalisa | Update | Green Locking | Arm cavity scan | Yesterday evening Nic and me were in the
lab. The Mode Cleaner was unlocked, but after
many attempt we could fix it and we did many |
|
|
8864
|
Wed Jul 17 22:49:37 2013 |
Koji | Update | Green Locking | ALS Y whitening filter change | [Koji Annalisa]
We did the same mod of the beatbox
for the Y arm too. See |
|
|
8865
|
Wed Jul 17 22:51:50 2013 |
Koji | Update | Green Locking | ALS Y performance with the new whitening filter | [Manasa Koji]
Summary:
The new whitening filters improved |
|
|
8866
|
Thu Jul 18 01:10:00 2013 |
kiwamu | Update | Green Locking | ALS Y performance with the new whitening filter |
|
|
|
8878
|
Fri Jul 19 12:00:12 2013 |
manasa | Update | Green Locking | ALS Y performance with the new whitening filter |
|
|
|
8886
|
Mon Jul 22 03:09:51 2013 |
Annalisa | Update | Green Locking | Y Arm cavity scan | Yesterday and today I was in the lab doing
many cavity scan.
First I did many measurement with |
|
|
8931
|
Sun Jul 28 20:13:41 2013 |
Annalisa | Update | Green Locking | Y Phase tracker calibration | I did a calibration measurement for the
Y part of the BeatBox using a Marconi. This
is in order to get a more accurate calibration |
|
|
9008
|
Tue Aug 13 21:09:03 2013 |
manasa | Update | Green Locking | Arms ready for ALS | I aligned
both the X and Y end green to the arms.
The transmitted green were aligned |
|
|
9014
|
Thu Aug 15 12:30:17 2013 |
manasa | Update | Green Locking | Lost beat notes | [Koji, Nic, Manasa]
Update from last night.
Koji and I realigned the green optics |
|
|
9015
|
Thu Aug 15 19:05:07 2013 |
manasa | Update | Green Locking | ALS out of loop noise | Beat notes were recovered for both the
arms.
I locked the arms to IR using PDH |
|
|
9025
|
Mon Aug 19 09:36:32 2013 |
Koji | Update | Green Locking | Xend green aligned | [Rana Koji]
This is an elog about the activity
on Friday night. |
|
|
9031
|
Mon Aug 19 14:22:36 2013 |
rana | Update | Green Locking | Xend green aligned | |
|
|
9033
|
Mon Aug 19 16:18:56 2013 |
manasa | Update | Green Locking | Xend green aligned | ASX scripts for PZT dither have been fixed
appropriately. Script resides in |
|
|
9034
|
Mon Aug 19 17:40:32 2013 |
Steve | Update | Green Locking | Xend green layout corrections | Shutter moved, no more clipping.
Pick-off mirror 2" replaced
by 1" one. Laseroptik HR 532nm, incident |
|
|
9035
|
Mon Aug 19 19:08:35 2013 |
Koji | Update | Green Locking | Xend green layout corrections | - An Aluminum mirror instead of 2"
unknown mirror for the pick-off for the rejected
beam from the green faraday isolator (Steve) |
|
|
9039
|
Tue Aug 20 10:59:15 2013 |
Steve | Update | Green Locking | Xend green layout corrections |
|
|
|
9044
|
Wed Aug 21 00:18:03 2013 |
Masayuki | Summary | Green Locking | X-arm PDH OLTF measurement | [Manasa Masayuki]
Today we measured the openloop transfer
function of the PDH green lock of the x-arm. |
|
|
9047
|
Wed Aug 21 19:37:25 2013 |
Masayuki | Summary | Green Locking | X-arm PDH OLTF measurement | [Manasa, Masyauki]
Today we measured OLTF of PDH green |
|
|
9054
|
Thu Aug 22 20:25:28 2013 |
Masayuki | Summary | Green Locking | Y-arm PDH OLTF measurement | [Manasa, Masayuki]
We measured the the openloop transfer
function of the PDH green lock of the y-arm.The |
|
|
9055
|
Thu Aug 22 21:16:47 2013 |
Manasa | Update | Green Locking | GTRY normalized | The Y arm green transmission has been measuring
in counts all along. I modified the gain
in the ALS-TRY filter module to normalise |
|
|
9056
|
Thu Aug 22 22:05:36 2013 |
rana | Update | Green Locking | GTRY normalized | Meh.
600 counts is too weak. You should
fix the electronics so that the maximized |
|
|
9083
|
Wed Aug 28 11:15:02 2013 |
Steve | Update | Green Locking | Xend green layout corrections |
|
|
|
9123
|
Wed Sep 11 23:34:37 2013 |
Masayuki | Summary | Green Locking | ALS locking in both arms | [manasa, masayuki]
We locked the XARM and YARM with
using ALS control loop and |
|
|
9124
|
Wed Sep 11 23:43:10 2013 |
Koji | Summary | Green Locking | ALS locking in both arms | What was the beat freq for each arm?
The HF noise level depends on the
frequency of the beat note. |
|
|
9125
|
Thu Sep 12 00:07:26 2013 |
Masayuki | Summary | Green Locking | ALS locking in both arms |
|
|
|
9161
|
Wed Sep 25 23:15:11 2013 |
Masayuki | Summary | Green Locking | FPMI noise caused by ARM locking | I measured some error signal, OLTFs and
responses for FPMI noise estimation. Especially
we are interested in the noise from in-loop |
|
|
9162
|
Wed Sep 25 23:59:29 2013 |
Masayuki | Summary | Green Locking | FPMI noise caused by ARM locking |
Measurement |
|
|
9163
|
Thu Sep 26 01:49:28 2013 |
Masayuki | Summary | Green Locking | FPMI noise caused by ARM locking |
Measurement |
|
|
9170
|
Fri Sep 27 16:02:23 2013 |
manasa | Update | Green Locking | Y arm ALS phase tracking loop gain changed | [Masayuki, Manasa]
While trying to lock the arms using
ALS we found that the locks were not very |
|
|
9171
|
Fri Sep 27 20:28:10 2013 |
manasa | Update | Green Locking | ALS servo | [Masayuki, Manasa]
I. ALS servo loops
After fixing things with the phase |
|
|
9176
|
Mon Sep 30 17:55:45 2013 |
manasa | Update | Green Locking | X and Y arm transmission needs to be decoupled | [Masayuki, Manasa]
Problem
We wanted to lock both the arms using |
|