| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
8812
|
Tue Jul 9 16:08:32 2013 |
Jenne | Update | ASC | POP QPD calibration attempt | [Jenne, Alex]
Calibration data for the POP QPD
has been taken, with the PRMI locked on sideband |
|
|
8840
|
Fri Jul 12 21:23:42 2013 |
Jenne | Update | ASC | POP QPD calibration attempt | These are the data, one plot for when the
vertical QPD position was changed, and one
for when the horizontal (yaw) QPD position |
|
|
8851
|
Mon Jul 15 17:16:59 2013 |
Jenne | Update | ASC | POP QPD calibration attempt | I tried to retake POP QPD calibration data
again today. The MC was mostly fine,
but whenever the PRMI unlocked, both ITM |
|
|
8854
|
Tue Jul 16 01:17:21 2013 |
Jenne | Update | ASC | POP QPD calibration attempt | [Rana, Jenne]
I took POP QPD calibration data with
a new method, on Rana's suggestion. |
|
|
8897
|
Tue Jul 23 01:30:27 2013 |
Jenne | Update | ASC | POP QPD analysis | I have some data for how much motion of
any PRMI-relevant optic affects the beam
seen by the POP QPD. |
9x |
|
8926
|
Fri Jul 26 13:39:30 2013 |
Koji | Update | ASC | POP QPD analysis | It was not actually easy to see from the
entry what signal was taken in what condition
but from the shape of the spectra |
|
|
8977
|
Wed Aug 7 15:32:37 2013 |
Koji | Update | ASC | ASS setting up accelerated (slightly) | I moved bunch of ezcawrite from the ASS
Dither On script to a snapshot file.
This accelerated a half of the "up" |
|
|
8980
|
Wed Aug 7 19:16:20 2013 |
Jenne | Update | ASC | ASS setting up accelerated more | I have furthered Koji's work, and moved
the filter on/off state for all the filter
banks also to the burt snapshot. |
|
|
8982
|
Wed Aug 7 22:18:43 2013 |
Koji | Update | ASC | ASS update | While Gautam is working on the Xarm green
ASS...
The EPICS monitor points for the |
|
|
8997
|
Mon Aug 12 14:05:34 2013 |
Jenne | Update | ASC | PRCL ASS software in place |
|
|
|
8998
|
Mon Aug 12 15:39:40 2013 |
Jenne | Update | ASC | PRCL ASS screens in place | I have added the PRCL ASS to the main ASS
screen, and created the servo and lockin
screens. The filters loaded are the |
|
|
8999
|
Mon Aug 12 17:30:03 2013 |
Koji | Update | ASC | PRCL ASS software in place | Why POPDC??? |
|
|
9001
|
Mon Aug 12 23:13:14 2013 |
Jenne | Update | ASC | PRCL ASS software in place |
|
|
|
9126
|
Thu Sep 12 01:06:09 2013 |
Jenne | Update | ASC | SRCL ASS implemented | I have modified the ASS model to also have
an ASS for SRCL. The input options
are POPDC, POP110, AS110. I suppose |
|
|
9207
|
Sun Oct 6 20:55:08 2013 |
rana | Summary | ASC | MC WFS Limits set based on 40 days of trends | MC3 watchdog gets tripped sometimes when
lock is lost. I noticed that there were no
limits set in the MC WFS drive. The attached |
|
|
9249
|
Thu Oct 17 13:26:13 2013 |
Jenne | Update | ASC | POP QPD realigned | I locked the PRMI, and tried to turn on
the ASS, but this caused PRMI to lose lock.
Since this is similar to what happened |
|
|
9460
|
Thu Dec 12 21:30:52 2013 |
Jenne | Update | ASC | PRMI-relevant oplevs centered | The ITM oplevs were pretty close to the
edge of their ranges, and none of the oplevs
have been centered in a while, so I centered |
|
|
9469
|
Fri Dec 13 19:33:56 2013 |
Den | Update | ASC | ETM X,Y QPDs | I have modified/compiled/installed/restarted
c1scx and c1scy models to include arm transmission
QPDs in angular controls. |
|
|
9558
|
Wed Jan 15 18:42:57 2014 |
Jenne | Update | ASC | POP ASC QPD offline for a few hours this afternoon | I was in the lab, near the south end of
the ITMX oplev table, looking for something,
and I bumped the POP ASC QPD's power supply. |
|
|
9619
|
Mon Feb 10 18:59:25 2014 |
Jenne | Update | ASC | PRM ASC better, but not great yet | I have turned off the 3.2Hz res gains in
the PRC ASC loops, since those seem to make
the loops unstable. |
|
|
9620
|
Mon Feb 10 19:56:10 2014 |
rana | Update | ASC | PRM ASC better, but not great yet | Ignoring the OSEM damping loops, the oplev
servo loops make it so that the POP ASC loops
do not see a simple pendulum plant, but instead |
|
|
9769
|
Mon Mar 31 23:57:22 2014 |
Koji | Summary | ASC | PRM ASC characterization / design | A
series of measurements / calculations for
the PRM ASC characterization and servo design |
7x |
|
9773
|
Tue Apr 1 22:03:44 2014 |
Koji | Summary | ASC | New PRM ASC is running | [Koji Jenne]
New PRM ASC was implemented. [to
be cnt'd] |
|
|
9777
|
Wed Apr 2 19:50:12 2014 |
Koji | Summary | ASC | New PRM ASC is running | As the designed ASC filters in this
entry had too little phase margins (~10deg),
I had to compromise the servo design. |
|
|
9779
|
Wed Apr 2 23:08:51 2014 |
Koji | Summary | ASC | New PRM ASC is running | The new PRM ASC design
Pitch
FM1: zero at 0Hz, pole at 2000Hz, |
|
|
9930
|
Thu May 8 14:37:02 2014 |
Jenne | Update | ASC | POP ASC QPD power | I was thinking about POP today, and wanted
to know if there was something to be done
to allow us to use the PRCL ASC for at least |
|
|
10114
|
Mon Jun 30 22:06:55 2014 |
Jenne | Update | ASC | IFO (mostly) aligned - ASS working | [Koji, Jenne]
The Yarm ASS is now working (as is
the Xarm ASS). Both of the TT's pitch |
|
|
10124
|
Wed Jul 2 16:18:32 2014 |
Jenne | Update | ASC | IFO aligned, PRMI + 2 arms achieved | After the meeting, I aligned the IFO to
the IR, and then I aligned the Ygreen to
the Yarm. I then found the beatnotes |
|
|
10278
|
Sat Jul 26 14:45:33 2014 |
Gabriele | Metaphysics | ASC | Response of POP QPD | Koji asked me to perform a simulation
of the response of POP QPD DC signal to mirror
motions, as a function of the CARM offset. |
|
|
10337
|
Wed Aug 6 10:45:56 2014 |
Gabriele | Update | ASC | POP QPD signals | In addition to the simulation described
in my
previous elog, I simulated the signal |
|
|
10338
|
Wed Aug 6 12:44:52 2014 |
Koji | Update | ASC | POP QPD signals | This is nice. Can we test this idea with
POP22 + a razor blade?
Just to take transfer functions in |
|
|
10398
|
Fri Aug 15 01:31:44 2014 |
Jenne | Update | ASC | POP QPD to ETMs model wiring complete | I have added a few things to the ASS model,
and the ASC sub-block, so that we can send
POP QPD information down to the ETMs for |
|
|
10454
|
Thu Sep 4 18:30:13 2014 |
Gabriele | Summary | ASC | Optimal Gouy phase for POP QPD | Jenne asked me to simulate the signals
on POP QPD when moving different mirrors,
as a function of the Gouy phase where the |
|
|
10503
|
Fri Sep 12 15:10:09 2014 |
Jenne | Update | ASC | MICH ASS | During the Sim meeting today, I added parts
to the ASS model so that we can also dither
the BS and minimize the power at AS. |
|
|
10662
|
Mon Nov 3 17:14:00 2014 |
ericq | Update | ASC | IMC to IFO angular motion | Something to note, as we have the IMC angular
controls under consideration:
Jenne has the DRMI locked right now. |
|
|
10663
|
Mon Nov 3 17:43:14 2014 |
Koji | Update | ASC | IMC to IFO angular motion | I wonder if this is the coherence caused
by the beam itself, or caused by the same
ground motion. |
|
|
10680
|
Thu Nov 6 12:53:09 2014 |
diego | Update | ASC | X arm restored | [Diego, Koji]
X arm has been restored, after modifying
the two parameters mentioned in http://nodus.ligo.caltech.edu:8080/40m/10676 |
|
|
10745
|
Tue Dec 2 01:27:22 2014 |
diego | Update | ASC | ASS Scripts for arms | I updated the medm C1ASS page for the Arm
scripts:
ON : same as before |
|
|
10752
|
Thu Dec 4 00:26:07 2014 |
Jenne | Update | ASC | POP yaw razor blade installed | We would like the option of feeding
back the POP beam position fluctuations to
the PRM to help stabilize the PRC since we |
|
|
10768
|
Tue Dec 9 03:34:52 2014 |
Jenne | Update | ASC | POP yaw razor tuning | With the re-do of the IFO alignment last
week, I think that the beam was no longer
about halfway on the POP22 razor blade. |
|
|
10789
|
Fri Dec 12 04:33:49 2014 |
Jenne | Update | ASC | ASS retuned | [Rana, Jenne]
We decided that tonight was the night
for ASS tuning. |
|
|
10807
|
Wed Dec 17 01:51:44 2014 |
rana, jenne | Update | ASC | ASS retuned | Did a big reconfig to make the Y-arm work
again since it was bad again.
Undid Koji's topology |
|
|
10811
|
Wed Dec 17 18:14:36 2014 |
ericq | Update | ASC | Transmon QPD -> ASC servos ready for comissioning | I have completed all of the model
modifications and medm screen updates to
allow for feedback from the transmon QPD |
|
|
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. |
|