| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
10551
|
Mon Sep 29 18:12:24 2014 |
ericq | Update | General | Vent update | I closed the PSL shutter as we didn't want
to burn the mirror surface when we are not
working. |
|
|
10552
|
Tue Sep 30 11:53:29 2014 |
ericq | Update | General | Vent update |
Photos have been taken of the ITMY
chamber, and uploaded to picasa. Here's a |
|
|
10554
|
Tue Sep 30 17:26:18 2014 |
ericq | Update | LSC | New AO cable in place | I've installed a new 2pin lemo cable going
from the CM servo out to in2 of the MC servo
board, and removed the temporary BNC. I used |
|
|
10558
|
Wed Oct 1 19:40:46 2014 |
ericq | Update | LSC | Arms IR aligned | Summary:
Beamsplitter
was put into MC refl path.
HWP
was rotated to maximize power into PMC.
|
|
|
10562
|
Fri Oct 3 03:02:17 2014 |
ericq | Update | LSC | No luck locking DRMI | I haven't been able to lock the DRMI tonight,
neither with 1F and no arms nor 3F and arms
held off with ALS... I tried previous recipes, |
|
|
10564
|
Fri Oct 3 13:03:05 2014 |
ericq | Update | IOO | IMC WFS measurements | Yesterday, Koji and I measured the transfer
function of pitch and yaw excitations of
each MC mirror, directly to each quadrant |
|
|
10571
|
Mon Oct 6 17:04:51 2014 |
ericq | Update | General | Unexpected power shutdown | I brought back the PMC, MC and Arms.
PMC:
Same as when we replaced |
|
|
10572
|
Mon Oct 6 17:36:17 2014 |
ericq | Update | General | Unexpected power shutdown | The autolocker is now working, but I didn't
change anything to make it so. I was just
putting in some echo statements, to see where |
|
|
10577
|
Tue Oct 7 16:19:50 2014 |
ericq | Update | General | Chiara not responding | We're back! It |
|
|
10580
|
Tue Oct 7 19:40:58 2014 |
ericq | Update | LSC | CM, REFL11 Wiring | I've changed the LSC rack wiring a little
bit, to give us some flexibility when it
comes to REFL11. |
|
|
10582
|
Wed Oct 8 03:37:44 2014 |
ericq | Update | LSC | PRFPMI, other sign of CARM offset | [ericq, Jenne]
We attempted some of the same old
CARM offset reduction tonight, but from the |
|
|
10589
|
Thu Oct 9 16:31:53 2014 |
ericq | Update | LSC | CARM W/N TFs | In my previous simulation results, I've
always plotted W/m, which isn't exactly straightforward.
We often think about the displacement that |
|
|
10592
|
Thu Oct 9 19:14:04 2014 |
ericq | Update | General | Power outage II & recovery | I touched up the PMC alignment.
While bringing back the MC, I realized
IOO got a really old BURT restore again... |
|
|
10594
|
Fri Oct 10 03:05:09 2014 |
ericq | Update | LSC | Which side of optical spring are we on? | I made some measurements to try and
see if any difference could be seen with
different CARM offset signs. |
|
|
10598
|
Mon Oct 13 12:01:28 2014 |
ericq | Update | LSC | Which side of optical spring are we on? | I went back into the DQ channels
to look at the TF from AO injection to REFLDC
(which is easy to do with this kind of noise |
|
|
10602
|
Mon Oct 13 17:09:38 2014 |
ericq | Update | CDS | Frame builder is mad |
This CPU load may have been me deleting
some old frame files, to see if that would |
|
|
10605
|
Tue Oct 14 17:38:31 2014 |
ericq | Update | Computer Scripts / Programs | Rossa and Allegra wiped, Ubuntu 12.04 installed | When I came in, Rossa was booted to Ubuntu
10. I tried rebooting to select 12, but couldn't
ever successfully boot again. Since Diego |
|
|
10613
|
Wed Oct 15 20:10:29 2014 |
ericq | Update | LSC | Interim DARM Signal | I've done
some preliminary modeling to see if there
is a good candidate for an |
7x |
|
10617
|
Thu Oct 16 12:22:43 2014 |
ericq | Update | CDS | Daqd segfaulting again | I've been trying to figure out why daqd
keeps crashing, but nothing is fixed yet.
I commented out the line in /etc/inittab |
|
|
10618
|
Thu Oct 16 16:21:42 2014 |
ericq | Update | LSC | Interim DARM Signal | I've added
(TRX-TRY)/(TRX+TRY) to the DC DARM sweep
plots, and it looks like an even better candidate. |
|
|
10621
|
Fri Oct 17 03:05:00 2014 |
ericq | Update | LSC | DARM locked on DC Transmission difference | I've
been able to repeatedly get off of ALS and
onto (TRY-TRX)/(TRY+TRX). Nevertheless, lock |
|
|
10627
|
Tue Oct 21 00:38:40 2014 |
ericq | Update | LSC | sweep + RMS as uncertainty |
|
|
|
10635
|
Thu Oct 23 13:08:55 2014 |
ericq | Update | General | Gap in local Chiara backups | After the second of the two recent power
outages, the outlet powering Chiara's external
drive for local backups didn't come back. |
|
|
10641
|
Mon Oct 27 19:15:54 2014 |
ericq | Update | LSC | Trying to PRMI on 165 | I spent some time trying to debug our inability
to get MICH onto REFL165Q while the arms
are held off with ALS, to no real success. |
|
|
10647
|
Tue Oct 28 15:27:25 2014 |
ericq | Update | IOO | IMC WFS sensing matrix measurement | I took some spectra of the error
signals and MC2 Trans RIN with the loops
off |
|
|
10649
|
Wed Oct 29 03:33:38 2014 |
ericq | Update | LSC | Trying to PRMI on 165 |
Short report: Further frustrated
by 165 tonight. The weird thing is, the procedure |
|
|
10655
|
Thu Oct 30 16:25:22 2014 |
ericq | Omnistructure | Computer Scripts / Programs | new version of cdsutils (361) installed |
|
|
|
10656
|
Fri Oct 31 02:19:37 2014 |
ericq | Update | LSC | Some SRMI progress | Earlier today, I did some simulations that
suggested that PRC lengths on the order of
a cm from our current estimated one could |
|
|
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. |
|
|
10667
|
Tue Nov 4 19:17:53 2014 |
ericq | Update | Computer Scripts / Programs | Anaconda + CDSutils | I've fallen down the rabbit hole of trying
to reconcile our desire for newer versions
of the Numpy and Scipy python packages with |
|
|
10668
|
Wed Nov 5 01:58:54 2014 |
ericq | Update | LSC | 3F RFPD RF spectra | Given the checkout of the aLIGO BBPDs happening
(aLOG
link), wherein the PDs were acting funny, |
|
|
10672
|
Wed Nov 5 18:08:00 2014 |
ericq | Update | LSC | PSL and AUXY beatnote in IR found | Green beatnotes |
|
|
10673
|
Wed Nov 5 22:25:42 2014 |
ericq | Update | LSC | 3F RFPD RF spectra |
Now that I have followed the chain,
the PD signal is indeed being amplified at |
|
|
10679
|
Thu Nov 6 11:49:58 2014 |
ericq | Update | LSC | 3F RFPD RF spectra |
|
|
|
10683
|
Fri Nov 7 02:21:12 2014 |
ericq | Update | LSC | 3F RFPD RF spectra |
After some enlightening conversation
with Koji, we figured that the RF amplifier |
|
|
10685
|
Fri Nov 7 14:41:18 2014 |
ericq | Update | LSC | 3F RFPD RF spectra |
|
|
|
10690
|
Sat Nov 8 16:01:32 2014 |
ericq | Configuration | LSC | DRMI sensing | Here are some preliminary results from
the sensing sweeps I did the other night.
Notes: |
6x |
|
10692
|
Mon Nov 10 18:11:57 2014 |
ericq | Update | LSC | 3F RFPD RF spectra | Jenne and I measured the situation
using a SHP-150 directly attached to the
REFL165 RF output, and at first glance, the |
|
|
10693
|
Mon Nov 10 18:23:10 2014 |
ericq | Configuration | LSC | DRMI sensing | ARG, I accidentally permuted the digital
demod angles. This significantly weakens
the argument for believing AS55I is broken... |
|
|
10699
|
Wed Nov 12 00:55:56 2014 |
ericq | Update | LSC | Notch at 110MHz |
|
|
|
10700
|
Wed Nov 12 01:30:39 2014 |
ericq | Update | LSC | DRFPMI, PRFPMI HOM resonances | I did some simulations to see if we are
susceptible to HOM resonances as we reduce
the CARM offset. I restricted my search to |
|
|
10705
|
Wed Nov 12 21:18:32 2014 |
ericq | Update | LSC | DRFPMI, PRFPMI HOM resonances | So, with my last entry, I was guilty of
just throwing stuff into the simulation and
not thinking about physics... so I retreated |
|
|
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. |
|
|
10720
|
Fri Nov 14 20:31:13 2014 |
ericq | Update | LSC | RIN in transmission a problem? | I took a quick look at single arm RIN.
Actuating on MC2 vs. the ETM, or using AS55
instead of POY11 made no noticeable difference |
|
|
10729
|
Fri Nov 21 02:22:25 2014 |
ericq | Update | LSC | More ALS PRFPMI exploration | Similar to what Jenne did the other
night, I kept the PRFPMI arm DoFs locked
on ALS, in hopes to check out the RF error |
|
|
10731
|
Fri Nov 21 13:58:51 2014 |
ericq | Update | Optical Levers | HeNe RIN test | Steve had me measure the RIN of a
JDSU HeNe laser. I used a PDA520, and measured
the RIN after the laser had been running |
|
|
10735
|
Tue Nov 25 14:52:14 2014 |
ericq | Update | Optical Levers | OpLev RINs | At Rana's request, I've made an in-situ
measurement of the RIN of all of our OpLevs.
PSL shutter closed, 10mHz BW. The OpLevs |
|
|
10744
|
Mon Dec 1 20:12:52 2014 |
ericq | Update | Modern Control | Rebirth of CESAR / ESCOBAR | I've uploaded a note at T1400735 about |
|
|
10754
|
Thu Dec 4 02:59:05 2014 |
ericq | Update | LSC | Bump in Darm Plant | [J,Q]
After some housekeeping (ASS is wonky,
alignment of X green beat was bad, tuning |
|
|
10783
|
Thu Dec 11 17:45:54 2014 |
ericq | Update | Computer Scripts / Programs | Lockloss plotting | With some advice from Jamie, I've
gotten the lock loss plotting script that
is used at LHO working on our machines. The |
|