| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
10812
|
Wed Dec 17 19:04:12 2014 |
jenne | Update | ASC | ASS retuned | I made the Xarm follow the new (old) topology
of Length -> test masses, and Trans ->
input pointing. |
|
|
10813
|
Wed Dec 17 19:31:55 2014 |
Koji | Update | ASC | ASS retuned | I wonder what to do with the X arm.
The primary purpose of the
ASS is to align the arm (=transmission), |
|
|
10886
|
Mon Jan 12 18:11:25 2015 |
ericq | Update | ASC | Test Mass -> Transmon QPD TFs measured | We want to have some angular control of
the arms during lock acquistion.
In single arm lock, Diego |
|
|
10908
|
Thu Jan 15 18:57:41 2015 |
ericq | Update | ASC | Transmon QPD loops live | I've measured the sensing for each
of the arms, by using our calibrated oplevs,
in terms of QPD counts per micron. It is: |
|
|
10920
|
Mon Jan 19 18:27:16 2015 |
ericq | Update | ASC | QPD ASC saga continues. | Herein,
I will try
to paint a more thorough picture of this |
|
|
10921
|
Tue Jan 20 02:39:49 2015 |
ericq | Update | ASC | QPD ASC saga continues. | Although the QPD loops are less than
ideal right now, I made changes to the ASC
model to trigger the QPD loops on and off |
|
|
10946
|
Tue Jan 27 21:33:39 2015 |
Koji | Update | ASC | ASS retuned | I checked the situation of ASS. I wanted
to know how much we are away from the maximum
transmittion. |
|
|
10952
|
Wed Jan 28 23:53:24 2015 |
Koji | Summary | ASC | Xarm ASS fix | X-Arm
ASS was fixed.
ASS_DITHER_ON.snap was updated so |
|
|
10963
|
Mon Feb 2 12:24:27 2015 |
Jenne | Update | ASC | POP QPD centered | After aligning the PRC, I centered the
POP QPD. |
|
|
10974
|
Wed Feb 4 18:27:55 2015 |
Koji | Summary | ASC | Xarm ASS fix | Please remember
that Xarm ASS needs FM6 (Bounce filters) |
|
|
10975
|
Wed Feb 4 19:21:37 2015 |
Koji | Update | ASC | Arm ASS servos now have triggered gain with arm lock status | We had persistent frustration by occasional
unlock during ASSing.
Today, I added triggers to the servo |
|
|
10997
|
Tue Feb 10 18:37:17 2015 |
ericq | Update | ASC | QPD ASC ready to go | I've remeasured the QPD ASC sensing
coefficients, and figured out what I did
weird with the actuation coefficients. I've |
|
|
11056
|
Fri Feb 20 19:09:48 2015 |
ericq | Update | ASC | QPD frontend code unified | I have changed all of the oplevs and transmon
QPDs to use the common ISC QPD library block,
which differs mainly in its divide by zero |
|
|
11057
|
Mon Feb 23 08:06:59 2015 |
rana | Update | ASC | QPD frontend code unified | Might have to also get the OL screens that
go with this new code to see, but the calibrations
don't go into the matrix, but rather |
|
|
11061
|
Tue Feb 24 18:54:26 2015 |
ericq | Update | ASC | Single arm QPD ASC stability | I've lowered the UGFs for the transmission
QPD servos to ~1-2Hz, and made it just an
integrator. I left the arms locked with the |
|
|
11125
|
Mon Mar 9 18:10:59 2015 |
Jenne | Update | ASC | Oplev filters re-copied | Back on Feb 20th (elog
11056) Q replaced all of our oplev parts
with the aLIGO version. |
|
|
11206
|
Tue Apr 7 04:21:45 2015 |
ericq | Update | ASC | Angular Control during Locking | [J, Q]
Alignment is making it tough for
locks to last more than 10 minutes. Many |
|
|
11242
|
Fri Apr 24 01:16:30 2015 |
Jenne | Update | ASC | Broken Xass? | I ran the "off" script for the
Xarm ASS, followed by the "on"
script, and now the Xarm ASS doesn't |
|
|
11248
|
Sat Apr 25 03:32:45 2015 |
Koji | Update | ASC | Broken Xass? | I spent a day to fix the XARM ASS, but
no real result. If the input of the 6th DOF
servo is turned off, the other error signals |
|
|
11253
|
Sun Apr 26 01:10:18 2015 |
rana | Update | ASC | unBroken Xass? | Today I tried some things, but basically,
lowering the input gain by 10 made the thing
stable. In the attached screenshotstrip, |
|
|
11255
|
Sun Apr 26 15:05:35 2015 |
Jenne | Update | ASC | unBroken Xass? | Thank you both.
I have updated the .snap file,
so that it'll use these parameters, as |
|
|
11269
|
Sun May 3 19:40:51 2015 |
rana | Update | ASC | Sunday maintenance: alignment, OL center, seismo, temp sensors | X
arm was far out in yaw, so I reran the ASS
for Y and then X. Ran OK; the offload from |
|
|
11296
|
Sun May 17 23:46:25 2015 |
rana | Update | ASC | IOO / Arm trends | Looking
at the summary
page trends from today, you can see that |
|
|
11482
|
Thu Aug 6 04:36:41 2015 |
ericq | Update | ASC | Reviving PRC angular feedforward | Tonight, I've taken a bunch of data
where the PRC is carrier locked and the ITM
oplevs have the DC coupling FM turned on, |
|
|
11489
|
Tue Aug 11 02:26:46 2015 |
ericq | Update | ASC | PRC Angular FF Lives! | PRC
Angular FF is back in action!
Short
and sweet of it: |
|
|
11562
|
Thu Sep 3 00:29:45 2015 |
rana | Update | ASC | ASS X not working | ran the ON script several times and it
kept pulling it away from good alignment,
even when TRX was > 0.9. |
|
|
11721
|
Wed Oct 28 17:06:30 2015 |
ericq | Update | ASC | New PRC Angular FF filters installed | I've installed new filters for the
T240 -> PRM static online angular feedforward
that were trained after some of the recent |
|
|
11776
|
Tue Nov 17 20:40:08 2015 |
yutaro | Summary | ASC | Loss maps of arm cavities | In preparation for the measurement of loss
maps of arm cavities, I measured the relationship
between: |
|
|
11779
|
Wed Nov 18 11:22:13 2015 |
yutaro | Update | ASC | Loss maps of arm cavities | I got linear relation between these. The
results and method are below.
|
|
|
12175
|
Tue Jun 14 11:29:25 2016 |
Johannes | Summary | ASC | YArm OpLev Calibration | In preparation for the armloss map I checked
the calibration of the Y-Arm ITM and ETM
OpLevs with the method originally described |
|
|
12591
|
Wed Nov 2 12:05:00 2016 |
ericq | Update | ASC | Quick WFS thoughts | I poked around a bit thinking about what
we need for a single AS WFS.
New things that we would need: |
|
|
13985
|
Tue Jun 19 00:19:00 2018 |
gautam | Update | ASC | POP status check | Motivation:
I want to use the QPD at
POP, calibrate it into physical units, and |
|
|
14205
|
Fri Sep 21 09:59:09 2018 |
yuki | Configuration | ASC | Y end table upgrade plan | [Yuki, Gautam]
Attachments #1 is the current setup
of AUX Y Green locking and it has |
|
|
14211
|
Sun Sep 23 17:38:48 2018 |
yuki | Update | ASC | Alignment of AUX Y end green beam was recovered | [ Yuki, Koji, Gautam ]
An alignment of AUX Y end green
beam was bad. With Koji and Gautam's |
|
|
14212
|
Sun Sep 23 19:32:23 2018 |
yuki | Configuration | ASC | Y end table upgrade plan | [ Yuki, Gautam ]
The setup I designed before has
abrupt gouy phase shift between two steering |
|
|
14214
|
Mon Sep 24 11:09:05 2018 |
yuki | Configuration | ASC | Y end table upgrade plan | [ Yuki, Steve ]
With Steve's help, we checked
a new lens can be set soon after dichroic |
|
|
14216
|
Tue Sep 25 18:08:50 2018 |
yuki | Configuration | ASC | Y end table upgrade plan | [ Yuki, Gautam ]
We want to remotely control steeing
PZT mirrors so its driver is needed. |
|
|
14218
|
Thu Sep 27 14:02:55 2018 |
yuki | Configuration | ASC | PZT driver board verification | [ Yuki, Gautam ]
I fixed the input terminal that
had been off, and made sure PZT driver |
|
|
14219
|
Sun Sep 30 20:14:51 2018 |
yuki | Configuration | ASC | QPD calibration | [ Yuki, Gautam, Steve ]
Results:
I calibrated a QPD (D1600079, V1009) |
|
|
14220
|
Mon Oct 1 12:03:41 2018 |
not yuki | Configuration | ASC | PZT driver board verification | I assume this QPD set is a D1600079/D1600273
combo.
How much was the SUM output during |
|
|
14221
|
Mon Oct 1 13:33:55 2018 |
yuki | Configuration | ASC | QPD calibration |
Quote:
|
|
|
14222
|
Mon Oct 1 20:39:09 2018 |
gautam | Configuration | ASC | c1asy | We need to set up a copy of the c1asx |
|
|
14224
|
Tue Oct 2 18:50:53 2018 |
yuki | Configuration | ASC | PZT mirror calibration | [ Yuki, Gautam ]
I calibrated PZT mirrors. The ROUGH
result was attached. (Note that some errors and |
|
|
14226
|
Wed Oct 3 14:24:40 2018 |
yuki | Configuration | ASC | Y end table upgrade plan | Interim Procedure Report:
Purpose
The current setup of AUX Y-arm |
|
|
14227
|
Wed Oct 3 18:15:34 2018 |
yuki | Configuration | ASC | AI board improvement | [ Yuki, Gautam ]
I improved Anti-Imaging board (D000186-Rev.D),
which will be put between DAC port and |
|
|
14228
|
Thu Oct 4 00:44:50 2018 |
yuki | Configuration | ASC | AI board improvement | [ Yuki, Gautam ]
I made a cable which connects DAC
port (40 pins) and AI board (25 pins). I |
|
|
14230
|
Thu Oct 4 22:15:30 2018 |
yuki | Configuration | ASC | Y-end table upgrade | Before changing setup at Y-end table, I
measured the status value of the former setup
as follows. These values will be compared |
|
|
14231
|
Fri Oct 5 00:46:17 2018 |
Koji | Configuration | ASC | Y-end table upgrade | ???
The SHG crystal has the conversion
efficiency of ~2%W (i.e. if you have 1W input |
|
|
14232
|
Fri Oct 5 17:32:38 2018 |
yuki | Configuration | ASC | Y-end table upgrade | I measured it with the wrong setting of
a powermeter. The correct ones are here:
beam power going into doubling |
|
|
14233
|
Fri Oct 5 17:47:55 2018 |
gautam | Configuration | ASC | Y-end table upgrade | What
about just copying the Xend |
|