| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
9586
|
Wed Jan 29 21:01:03 2014 |
Gabriele | Summary | LSC | PRC length measurement analysis | [Manasa,
EricQ, Gabriele]
We |
|
|
8562
|
Sat May 11 01:11:52 2013 |
Koji | Update | ASC | PRC mode stabilization with a shadow sensor at POP | Ah, AWESOME.
Indefinite PRMI lock was finally achieved. |
|
|
13974
|
Sat Jun 16 00:26:48 2018 |
gautam | Update | General | PRC modescan attempt | [Jon, Gautam, Johannes]
We did the following today:
Dither align arms such |
|
|
13975
|
Sat Jun 16 01:25:29 2018 |
Koji | Update | General | PRC modescan attempt | The PRC FSR is, of course, very close to
twice of our f1 moudlation frequency (11MHz
x 2 = 22MHz) . |
|
|
13976
|
Sat Jun 16 20:57:59 2018 |
Jon | Update | General | PRC modescan attempt | Here's a Finesse modeling of what
we're expecting to observe with this
test. It uses Gautam's base |
|
|
7533
|
Thu Oct 11 21:26:40 2012 |
janosch | Update | General | PRC phase maps | Just some plots. There is nothing new here
except for the fact that I learned how to analyze
phase maps myself and how to prepare them |
7x |
|
2493
|
Sat Jan 9 15:02:01 2010 |
Alberto | Update | ABSL | PRC scanning | I scanned the PRC in the frequency range
of 30-60 MHz, untill the PLL lost lock. But
everything is working fine.
The |
|
|
7357
|
Fri Sep 7 01:25:53 2012 |
Jenne | Update | General | PRC, SRC flashing | [Koji, Jenne]
* Found that IPANG was no longer
centered, so we used PZT2's sliders to get |
|
|
8022
|
Thu Feb 7 12:56:18 2013 |
Jamie | Summary | General | PRC/arm mode matching calculations | NOTE:
There was a small bug in my initial calculation.
The plots and numbers have been updated with |
8x |
|
8025
|
Thu Feb 7 17:10:11 2013 |
Koji | Summary | General | PRC/arm mode matching calculations |
|
|
|
8029
|
Fri Feb 8 00:23:33 2013 |
rana | Summary | General | PRC/arm mode matching calculations |
I would guess that either flipping
PR2 or PR3 would give nearly the same effect |
|
|
8033
|
Fri Feb 8 11:07:07 2013 |
Jamie | Summary | General | PRC/arm mode matching calculations |
|
|
|
8035
|
Fri Feb 8 12:42:45 2013 |
nicolas | Summary | General | PRC/arm mode matching calculations |
|
|
|
8019
|
Wed Feb 6 22:39:23 2013 |
Jamie | Update | General | PRC/arm mode matching with flipped PR2/PR3: coming soon | I intended to post a long analysis of the
PRC/arm mode matching for the various TT
situations using Nic's a |
|
|
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 |
|
|
8997
|
Mon Aug 12 14:05:34 2013 |
Jenne | Update | ASC | PRCL ASS software in place |
|
|
|
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 |
|
|
|
8516
|
Tue Apr 30 23:17:25 2013 |
Jenne | Update | LSC | PRCL LSC filters copied to CARM bank temporarily | Koji is working on PRMI locking with different
photodiodes, and rather than typing different
numbers into the input matrix, it is more |
|
|
11258
|
Mon Apr 27 01:13:08 2015 |
Jenne | Update | LSC | PRCL angular FF not working, no locking :( | I'm sad. And frustrated.
The PRCL angular feed forward is
not working, and without it I am having a |
|
|
8730
|
Wed Jun 19 23:50:44 2013 |
Jenne | Update | LSC | PRCL locking again | This is a mid-evening update, so I don't
forget all the stuff I've already done.
Aligned PRMI, no nice flashes on |
|
|
8753
|
Wed Jun 26 04:38:02 2013 |
Jenne | Update | LSC | PRCL locking again - ASC success | With Rana's help/supervision/suggestions,
I have closed the loop on the PRMI ASC servo
with the new QPD. I think I've |
|
|
8780
|
Fri Jun 28 02:12:41 2013 |
Jenne | Update | LSC | PRCL locking again - ASC work | Rana had the epiphany that I didn't have
any antiwhitening for my POP QPD. Ooops.
We looked at the schematic for the |
|
|
8767
|
Thu Jun 27 17:09:41 2013 |
Jenne | Update | LSC | PRCL locking again - POP PIT work | Last night before dinner, I copied over
the ASC yaw servo filters to the ASC pitch
filter bank. Using ASC gain of +0.001, |
|
|
8731
|
Thu Jun 20 01:13:18 2013 |
Jenne | Update | LSC | PRCL locking again - no ASC success | I didn't have any success with the ASC
tonight. I copied over the filters
that Koji had used in elog |
|
|
13953
|
Wed Jun 13 11:17:40 2018 |
gautam | Update | LSC | PRCL loop shape anomaly | Attachment
#1 shows the measured |
|
|
13959
|
Thu Jun 14 00:40:42 2018 |
gautam | Update | LSC | PRCL loop shape anomaly | don't use IN_1/IN_2: recall pizza meeting
from a few weeks back: use IN1/EXC + Al-Gebra
|
|
|
8439
|
Thu Apr 11 02:49:18 2013 |
Den | Update | Locking | PRCL on carrier | Jenne, Den
We suspect PRM shows significant
length to angle coupling due to large oplev |
|
|
9523
|
Mon Jan 6 22:11:46 2014 |
Jenne | Update | LSC | PRCL sideband locking still not so happy |
The PRCL once again doesn't
want to lock on sidebands for me. I |
|
|
9859
|
Sun Apr 27 19:53:54 2014 |
ericq | Update | LSC | PRFP YArm Locking | Inspired by a comment by Koji the other
day, I spent some time yesterday and today
working on locking a (very lossy) power recycled |
|
|
15822
|
Fri Feb 19 13:38:26 2021 |
gautam | Update | LSC | PRFPMI | I forgot that I had already done some investigation
into recovering the PRFPMI lock after my
work on the RF source. I don't really |
|
|
10713
|
Fri Nov 14 02:43:05 2014 |
ericq | Update | LSC | PRFPMI HOM resonances | I've extended my analysis to the PRFPMI
case, with the current working knowledge
of radii of curvature and cavity lengths. |
|
|
11536
|
Fri Aug 28 02:20:35 2015 |
Ignacio | Update | LSC | PRFPMI and MCL FF | A day late
but here it is.
Eric |
|
|
9439
|
Wed Dec 4 14:16:42 2013 |
Jenne | Update | LSC | PRFPMI flashes on transmission QPDs | 2 weeks ago I took some data, and remembered
today at the 40m meeting that I hadn't posted
it. Bad grad student. |
|
|
11518
|
Thu Aug 20 02:31:09 2015 |
ericq | Update | LSC | PRFPMI is back | PRFPMI
locking has been revived.
I've
had 6 5min+ locks so far; arm powers usually |
|
|
11528
|
Tue Aug 25 04:15:51 2015 |
ericq | Update | LSC | PRFPMI is back | More PRFPMI locks tonight. Right now, it's
been locked for 22+ minutes, though with
the PRMI still on 3F signals. I think the |
|
|
11534
|
Thu Aug 27 04:23:04 2015 |
ericq | Update | LSC | PRFPMI is back | Got to a 40 minute lock tonight. All other
locks broke because of me poking something.
I redid some sensing excitations, |
|
|
11599
|
Tue Sep 15 15:10:48 2015 |
gautam, ericq, rana | Summary | LSC | PRFPMI lock & various to-do's | [SIZE=3]I was observing Eric while he was
attempting to lock the PRFPMI last night.
The handoff from ALS to LSC was not very |
|
|
12579
|
Tue Oct 25 15:56:11 2016 |
gautam | Update | General | PRFPMI locked, arms loss improved | [ericq,gautam]
Given that most of the post vent
recovery tasks were done, and that the ALS |
|
|
12580
|
Tue Oct 25 18:07:28 2016 |
Koji | Update | General | PRFPMI locked, arms loss improved | Great to hear that we have the PRG of ~16
now!
Is this 150ppm an avg loss per |
|
|
12583
|
Thu Oct 27 12:06:39 2016 |
gautam | Update | General | PRFPMI locked, arms loss improved |
|
|
|
12584
|
Thu Oct 27 13:48:20 2016 |
Koji | Update | General | PRFPMI locked, arms loss improved | It is also difficult to have a high arm
transmission without having high PRG.
What about to plot the arm trans |
|
|
12585
|
Thu Oct 27 23:29:47 2016 |
ericq | Update | General | PRFPMI locked, arms loss improved | As Gautam mentioned, we had some success
locking the PRFPMI last
night. (SRM satellite box is still in surgery...) |
|
|
16251
|
Mon Jul 19 22:16:08 2021 |
paco | Update | LSC | PRFPMI locking | [gautam, paco]
Gautam managed to lock PRFPMI a
little before ~ 22:00 local time. The ALS |
|
|
16241
|
Thu Jul 8 11:20:38 2021 |
Anchal, Paco, Gautam | Summary | LSC | PRFPMI locking attempts | Last night Gautam walked us through the
algorithm used to lock PRFPMI. We tried it
several times with the PSL HEPA filter off |
|
|
15994
|
Sat Apr 3 00:42:40 2021 |
gautam | Update | LSC | PRFPMI locking with half input power | Summary:
I wanted to put my optomechanical
instability hypothesis to the test. So |
|
|
12586
|
Fri Oct 28 01:44:48 2016 |
gautam | Update | General | PRFPMI model vs data studies | Following Koji's suggestion, I decided
to investigate the relation between my Finesse
model and the measured data. |
6x |
|
15827
|
Fri Feb 19 18:22:42 2021 |
rana | Update | LSC | PRFPMI sensiing matrix woes | I would:
look at the free swingin
michelson. Should be able tu null that siggnal |
|
|
15352
|
Tue May 26 03:06:59 2020 |
gautam | Update | LSC | PRFPMI sensing matrix | Summary:
The response of the PRFPMI length
degrees of freedom as measured in the LSC |
|
|
10856
|
Tue Jan 6 03:09:17 2015 |
diego | Update | LSC | PRFPMI status & IFO status | [Jenne, Rana, EricQ, Diego]
Tonight we worked on getting the
IFO back in a working status after the break, |
|