| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
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 |
|
|
10753
|
Thu Dec 4 01:24:47 2014 |
Jenne | Update | SUS | PRM volin 3rd harmonic | Earlier this afternoon, while locking PRMI,
I saw a big peak at 1883.48 Hz. This
comes closest to the PRM's 627.75 Hz *3, |
|
|
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 |
|
|
10751
|
Wed Dec 3 21:41:12 2014 |
Jenne | Update | Computer Scripts / Programs | Matlab license updated | It seems that the old Matlab servers went
down a week or so early, so I have updated
the Matlab license information in |
|
|
10750
|
Wed Dec 3 08:36:49 2014 |
Steve | Update | LSC | good IFO status | |
|
|
10749
|
Wed Dec 3 02:01:57 2014 |
Koji | Update | LSC | IR Resonance Script Status | The other night (before the holidays),
I tried ALS offset tuning with IR POX/POY
signals and it worked pretty good. |
|
|
10748
|
Wed Dec 3 01:46:12 2014 |
Koji | Update | LSC | Tried cav pole compensation trick - fail | Where did these 200Hz, 6kHz come from?
I wonder what are the correct
filters to be incorporated in the filter |
|
|
10747
|
Wed Dec 3 01:18:15 2014 |
diego | Update | LSC | IR Resonance Script Status | Tonight I started testing a new method
for the fine scan:
the idea is to use the |
|
|
10746
|
Tue Dec 2 02:44:45 2014 |
Jenne | Update | LSC | Tried cav pole compensation trick - fail | [Jenne, Diego]
First, random notes:
saw a violin peak in CARM |
|
|
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 |
|
|
10744
|
Mon Dec 1 20:12:52 2014 |
ericq | Update | Modern Control | Rebirth of CESAR / ESCOBAR | I've uploaded a note at T1400735 about |
|
|
10743
|
Mon Dec 1 17:43:22 2014 |
Jenne | Update | LSC | Reset Yarm trans normalization | After Koji and I reset the transmission
normalizations last Friday, he did some alignment
work that increased the Yarm power. |
|
|
10742
|
Mon Dec 1 17:19:22 2014 |
Jenne | Update | General | PMC align | [Diego, Jenne]
Tweaked up the input alignment to
the PMC. Now we're at 0.785. |
|
|
10741
|
Mon Dec 1 17:13:57 2014 |
Steve | Update | VAC | RGA scan pd78 -day 63 |
|
|
|
10740
|
Mon Dec 1 16:34:20 2014 |
Jenne | Update | General | IFO wake-up |
After its' several days of
rest, it is time to wake up the IFO. |
|
|
10739
|
Mon Dec 1 15:41:38 2014 |
Steve | Update | General | X end fiber insulated and on cable tray |
|
|
|
10738
|
Mon Dec 1 07:30:29 2014 |
Steve | Update | SUS | ETMX damping restored | ETMX sus damping restored and PMC locked
manually. |
|
|
10737
|
Wed Nov 26 22:24:28 2014 |
Jenne | Update | LSC | DARM loop improved, other work | [Jenne, Koji]
We have done several things this
evening, which have incrementally helped |
8x |
|
10736
|
Wed Nov 26 05:15:48 2014 |
Jenne | Update | LSC | PRFPMI tonight PRMI 100Hz osc? | [Jenne, EricQ]
Just to get our day started right,
we tweaked up the alignment of the Ygreen |
|
|
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 |
|
|
10734
|
Tue Nov 25 02:04:19 2014 |
Jenne | Update | LSC | PRFPMI tonight - need some PRCL and MICH tuning at high arm powers | Take-away for the night: We need
to do some more fine-tuning of the PRCL and
MICH loops when we have arm resonance. |
|
|
10733
|
Mon Nov 24 20:24:29 2014 |
diego | Update | SUS | Anti-Jitter Telescope for OpLevs | I stared a bit longer at the plots and
thanks to Eric's feedback I noticed I payed
too much attention to the comparison between |
6x |
|
10732
|
Fri Nov 21 18:23:01 2014 |
diego | Update | SUS | Anti-Jitter Telescope for OpLevs | EDIT: some images look
bad on the elog, and the notebook is parsed, |
14x |
|
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 |
|
|
10730
|
Fri Nov 21 11:41:24 2014 |
manasa | Update | General | X end fiber insulated and on cable tray |
|
|
|
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 |
|
|
10728
|
Thu Nov 20 22:43:15 2014 |
Koji | Update | IOO | IMC WFS damping gain adjustment | From the measured OLTF, the dynamics of
the damped suspension was inferred by calculating
H_damped = H_pend / (1+OLTF). |
|
|
10727
|
Tue Nov 18 22:34:28 2014 |
Jenne | Update | LSC | Some other plots from PRFPMI |
|
|
|
10726
|
Tue Nov 18 17:11:30 2014 |
Jenne | Update | LSC | Some lockloss plots from PRFPMI | I am still staring at / trying to figure
out the latter 4 locklosses posted earlier.
But, I have just included the transmission |
|
|
10725
|
Tue Nov 18 15:20:58 2014 |
Jenne | Update | LSC | Some lockloss plots from PRFPMI | Elog from ~5am last night:
Tonight was just several trials
of PRFPMI locking, while trying to pay more |
8x |
|
10724
|
Mon Nov 17 23:04:51 2014 |
Jenne | Update | PSL | Aligned PMC | I aligned the beam into the PMC, mostly
in yaw. Don't know why it drifted,
but it was annoying me, so I fixed it. |
|
|
10723
|
Mon Nov 17 20:40:29 2014 |
rana, diego | Update | IOO | Investigating the IMC WFS situation | We've known for years that the IMC WFS
sensing chain is pointlessly bad, but until
recently, we haven't thought it was worth |
|
|
10722
|
Mon Nov 17 20:28:17 2014 |
rana | Summary | IOO | MC servo summing amp | I modified the /cvs/cds/caltech/target/c1psl/psl.db
file to adjust the records for the FSS-FAST
signal (to make it go yellow / red at the |
|
|
10721
|
Sat Nov 15 21:51:09 2014 |
rana | Update | PEM | Seismometers set up for huddle test | In order to do high quality
huddle subtraction, we need to align the
seismometer axes to high precision. We would |
|
|
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 |
|
|
10719
|
Fri Nov 14 19:28:33 2014 |
Jenne | Update | SUS | ASS gain reduced for Yarm | [Koji, Jenne]
We noticed last night that the yarm
couldn't handle the old nominal gain for |
|
|
10718
|
Fri Nov 14 17:08:17 2014 |
Jenne | Update | LSC | RIN vs. Seismic | T-240 has a different convention than we
use. It assumes that North is aligned
with the Y-axis. Since this is the |
|
|
10717
|
Fri Nov 14 15:45:34 2014 |
Jenne | Update | CDS | Computers back up after reboot | [Jenne, Q]
Everything |
|
|
10716
|
Fri Nov 14 15:26:45 2014 |
Steve | Update | safety | Diego gets safety traning | Diego Bersanetti received 40m specific
safety training today. |
|
|
10715
|
Fri Nov 14 11:07:59 2014 |
manasa | Update | CDS | Not able to run models on FE machines |
|
|
|
10714
|
Fri Nov 14 08:25:29 2014 |
Steve | Update | SUS | morning issues | PRM, SRM and the ENDs are kicking up.
Computers are down. PMC slider is stuck
at low voltage. |
|
|
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. |
|
|
10712
|
Thu Nov 13 23:42:01 2014 |
Jenne | Update | LSC | RIN vs. Seismic | After Kate, Diego and I moved the seismometers
to the corner for a huddle test (see elog
10711), I wanted to check the coherence |
|
|
10711
|
Thu Nov 13 22:52:48 2014 |
kate | Update | PEM | Seismometers set up for huddle test | Jenne, Diego, Kate
We want to conduct a huddle test
with the three 40m seismometers (2 Guralps |
|
|
10709
|
Thu Nov 13 04:28:28 2014 |
Jenne | Update | LSC | RIN in transmission a problem? | [Jenne, Rana, Koji]
We
did some thinking on what could be causing |
|
|
10708
|
Thu Nov 13 01:03:28 2014 |
rana, jenne | Update | SUS | OL updates on ITMs and ETMs | We copied the new SRM filters over
onto the OL banks for the ITMs and ETMs.
We then adjusted the gain to be 3x lower |
|
|
10707
|
Thu Nov 13 01:00:37 2014 |
rana | Update | LSC | RIN in transmission a problem? |
I modified the MC2 trans optical
setup a little bit: the reflection from the |
|
|
10706
|
Wed Nov 12 22:22:11 2014 |
Koji | Summary | IOO | Estimation of the angular jitter imposed by the TTs | [Koji, Rana, Jenne]
One coil of the TT produce 36nrad/rtHz
at DC. |
|
|
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 |
|
|
10704
|
Wed Nov 12 20:11:41 2014 |
Koji | Update | IOO | MC WFS gain reduced again | MC WFS was oscillative at 1Hz. I've reduced
the servo gain further (x1, x1, x10, x1,
x1, and x10). |
|