| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
10682
|
Thu Nov 6 14:41:49 2014 |
Koij | Update | LSC | 3F RFPD RF spectra | That's not what I'm asking.
Also
additional cables are left connected to the |
|
|
10681
|
Thu Nov 6 12:58:28 2014 |
Koji | Update | IOO | WFS offset was reset | IMC WFS operating point seemed to get degraded.
- IMC WFS feedback was relieved.
- WFS servo was turned off. |
|
|
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 |
|
|
10679
|
Thu Nov 6 11:49:58 2014 |
ericq | Update | LSC | 3F RFPD RF spectra |
|
|
|
10678
|
Thu Nov 6 11:40:58 2014 |
Steve | Update | General | He/Ne telescope | Liyuan is measuring the He/Ne telescopes
in the Y arm between the tube and CES wall.
He'll be here till 1pm |
|
|
10677
|
Thu Nov 6 10:18:12 2014 |
Steve | Update | General | fiber insulation in cable tray |
|
|
|
10676
|
Thu Nov 6 03:29:00 2014 |
diego | Update | LSC | IR Resonance Script Status | EDIT on X arm: I found different settings
in C1SUS_ITMX, with respect to ETMX, ITMY
and ETMY (namely LSC/DAMP is OFF and LSC/BIAS |
|
|
10675
|
Thu Nov 6 01:58:55 2014 |
Koji | Update | LSC | 3F RFPD RF spectra | Where is the PD out spectrum measured with
the coupler??? |
|
|
10674
|
Thu Nov 6 01:48:30 2014 |
diego | Update | LSC | IR Resonance Script Status | Tonight I tried some more tests on
the script; it seems to work better, with
both performance and robustness improved, |
|
|
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 |
|
|
10672
|
Wed Nov 5 18:08:00 2014 |
ericq | Update | LSC | PSL and AUXY beatnote in IR found | Green beatnotes |
|
|
10671
|
Wed Nov 5 17:50:29 2014 |
manasa | Update | General | PSL and AUXY beatnote in IR found | Found
the IR beatnote between PSL and Y end laser. |
|
|
10670
|
Wed Nov 5 11:37:29 2014 |
manasa | Update | General | Light from Y end reaches PSL table | [Steve, Diego, Manasa]
Since the beatnotes have disappeared,
I am taking this as a chance to put the FOL |
|
|
10669
|
Wed Nov 5 11:09:44 2014 |
Koji | Update | LSC | 3F RFPD RF spectra | If you look at the intermodulation at 14
(4+10) and 16 (6+10), 15 (5+10) would make
any problem, thanks to the notch at 1f and |
|
|
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, |
|
|
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 |
|
|
10666
|
Tue Nov 4 14:46:00 2014 |
manasa | Update | Green Locking | Missing beatnotes | Summary: Cannot find beatnotes
between the arms and PSL.
I wanted to measure the ALS out of |
|
|
10665
|
Tue Nov 4 10:40:46 2014 |
steve | Update | PEM | lab temperatures and particle counts |
|
|
|
10664
|
Mon Nov 3 17:56:57 2014 |
Koji | Update | LSC | SRM calibration | SRM
Calibration
After the DRMI measurements on Friday, |
|
|
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. |
|
|
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. |
|
|
10661
|
Sat Nov 1 16:06:32 2014 |
Koji | Configuration | LSC | DRMI locked | Continued from ELOG
10659
|
6x |
|
10660
|
Sat Nov 1 02:13:11 2014 |
Koji | Configuration | LSC | LSC settings | I'm leaving the iFO now. It is left with
the IR arm mode.
I pretty much messed up LSC configurations |
|
|
10659
|
Fri Oct 31 19:59:26 2014 |
Koji | Update | General | Some locking work / PRMI analysis | Preparations
- According to Diego's report, the
MC WFS gains were too high. We'll fix this |
|
|
10658
|
Fri Oct 31 15:34:47 2014 |
Steve | Update | PSL | PSL HEPAs are running again |
|
|
|
10657
|
Fri Oct 31 11:46:15 2014 |
manasa | Update | | Rattling HEPA : Eventually stops | The PSL HEPA stopped
working while it was running |
|
|
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 |
|
|
10655
|
Thu Oct 30 16:25:22 2014 |
ericq | Omnistructure | Computer Scripts / Programs | new version of cdsutils (361) installed |
|
|
|
10654
|
Thu Oct 30 02:54:38 2014 |
diego | Update | LSC | IR Resonance Script Status | [Diego, Jenne]
The script is moving forward and
we feel we are close, however we still have |
|
|
10653
|
Thu Oct 30 02:12:59 2014 |
diego | Update | IOO | IMC WFS sensing matrix measurement | [Diego,Koji]
Today we took some measurements of
transfer functions and power spectra of suspensions |
12x |
|
10652
|
Thu Oct 30 01:21:37 2014 |
Jenne | Update | LSC | No MICH in REFL165 | [Koji, Jenne, Diego]
Summary: |
|
|
10651
|
Wed Oct 29 18:07:28 2014 |
manasa | Update | General | Diode laser test preparation | I ran 3 BNC cables from the SP table to
1X7 rack so that we can have 16 bit channels
for the Ontrak PD that will be used to test |
|
|
10650
|
Wed Oct 29 11:45:11 2014 |
manasa | Update | General | Y AUX laser - fiber coupled (52%) |
|
|
|
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 |
|
|
10648
|
Tue Oct 28 20:47:08 2014 |
diego | Update | IOO | IMC WFS sensing matrix measurement | Today I started looking into the WFS problem
and improvement, after being briefed by Koji
and Nicholas. I started taking some measurements |
6x |
|
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 |
|
|
10646
|
Tue Oct 28 14:07:28 2014 |
Koji | Update | IOO | IMC WFS sensing matrix measurement | Last night the sensing matrix for IMC WFS&QPD
were measured.
C1:IOO-MC(1, 2, 3)_(ASCPIT, ASCYAW)_EXC |
|
|
10645
|
Tue Oct 28 11:45:21 2014 |
manasa | Update | SUS | ETMX - observation | I looked at what are the situations that
make ETMX lose alignment.
This is not occur all that often |
|
|
10644
|
Tue Oct 28 02:44:08 2014 |
Jenne | Update | SUS | ETMX bad :( | Okay, now ETMX's badness is a show-stopper.
I'm not sure why, but after this last lockloss,
ETMX won't stay put. Right now (as |
|
|
10643
|
Tue Oct 28 01:12:57 2014 |
Jenne | Update | SUS | ETMX bad :( | ETMX is misbehaving again. I went
to go squish his cable at the rack and at
the satellite box, but it still happened |
|
|
10642
|
Mon Oct 27 22:19:17 2014 |
Jenne | Update | CDS | c1iscex restarted | I'm not sure why, but c1iscex did not want
to do an mxstream restart. It would
complain at me that "* ERROR: |
|
|
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. |
|
|
10640
|
Mon Oct 27 12:17:46 2014 |
manasa | Update | General | Y AUX laser coupling telescope design | Since I obtained a poor coupling efficiency
from the earlier setup, I went back to calculate
the coupling efficiency of the current setup. |
|
|
10639
|
Fri Oct 24 18:53:23 2014 |
rana | Update | General | Y AUX laser - fiber coupled | 10% seems like a pretty bad coupling
efficiency, even for a single lens. I know
that the NPRO itself isn't so elliptical |
|
|
10638
|
Fri Oct 24 10:08:24 2014 |
manasa | Update | General | Y AUX laser - fiber coupled | The Y end aux laser light
leaking after the doubling crystal has been |
|
|
10637
|
Fri Oct 24 02:14:05 2014 |
Jenne | Update | LSC | Increased DARM gain even more | [Jenne, Diego]
We spent the afternoon working on
the new scan for IR resonance script. |
|
|
10636
|
Thu Oct 23 17:45:54 2014 |
Jenne | Update | General | Pianosa frozen | Not sure why, but Pianosa was frozen.
Also couldn't ssh or ping. So, I hard
power cycled it. |
|
|
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. |
|
|
10634
|
Thu Oct 23 02:08:40 2014 |
Jenne | Update | LSC | Increased DARM gain | I changed the carm_cm_up.sh script so
that it requires fewer human interventions.
Rather than stopping and asking for things |
6x |
|
10633
|
Thu Oct 23 01:39:34 2014 |
Jenne | Update | CDS | Daqd "fixed"? | Merging of threads.
ChrisW figured out that it looks
like the problem with the frame builder is |
|