ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
2422
|
Wed Dec 16 11:46:25 2009 |
Alberto | Update | ABSL | Absl PLL Open Loop Gain | Yesterday I measured the Open Loop Gain
of the PLL in the absolute length experiment.
The servo I used was that of the old Universal |
|
|
2423
|
Wed Dec 16 11:55:47 2009 |
rana | Update | ABSL | Universal PDH Box Servo Filters |
To me, they both look stable.
I guess that the phase has to go to -180 |
|
|
2424
|
Wed Dec 16 20:29:08 2009 |
rana | Update | COC | ETM Coating study | This plot shows the Transmission for 532
and 1064 nm as a function of the thickness
of the SiO2 layer. |
|
|
2425
|
Thu Dec 17 02:57:08 2009 |
Jenne | Update | WienerFiltering | L1 DARM Static Wiener Filtered data | This is perhaps best put in the LLO elog,
but I'm not yet a 'person' there, so I can't
write to their elog (yet another thing for |
|
|
2426
|
Thu Dec 17 07:47:29 2009 |
Jenne | Update | WienerFiltering | L1 DARM Static Wiener Filtered data | This surface plot is the same as the previous
one, with a little more data than I had previously.
|
|
|
2427
|
Thu Dec 17 09:30:08 2009 |
Alberto | HowTo | Computers | Nodus sluggish | The elog has been quite slow for the last
two days. The cause is nodus, that has been
slowing down the access to it. |
|
|
2428
|
Thu Dec 17 17:13:50 2009 |
Alberto | Omnistructure | Environment | STACIS stuff | One of the electronics benches is currently
occupied by the STACIS equipment.
We
need that table If no one is working on the |
|
|
2429
|
Thu Dec 17 19:03:14 2009 |
Alberto | HowTo | Computers | Nodus sluggish |
|
|
|
2430
|
Thu Dec 17 23:27:23 2009 |
rana | Update | PEM | Ranger Noise: sim w. Rai FET box as readout | I have started measuring the low frequency
noise of the FET front end + LT1128 low noise
preamp from Rai Weiss. It has a very low |
|
|
2431
|
Fri Dec 18 15:40:33 2009 |
Koji | Update | IOO | MC2 spot centered / MCT QPD issue | This afternoon I felt like saying hello
to the input mode cleaner. So I decided to
center the spot on MC2. |
|
|
2432
|
Sat Dec 19 14:33:25 2009 |
Koji | Configuration | Computers | PDFlib lite / gnuplot 4.2.6 on Rosalba/Allegra | In order to enable 'set terminal pdf' in
gnuplot on Rosalba/Allegra, I installed PDFlib
lite and gnuplot v4.2.6. to them. |
|
|
2433
|
Sun Dec 20 14:34:24 2009 |
Koji | Update | SUS | ETMY watchdog tripped Sunday 5:00AM local | It seemed that the ETMY watchdog tripped
early Sunday morning.
The reason is not known. I just looked |
|
|
2434
|
Sun Dec 20 21:39:40 2009 |
rana, jenne, kiwamu | Update | ASS | OAF Model update and build instructions | After a lot of headache, I
got the OAF working again - read on for details.....................
|
|
|
2435
|
Sun Dec 20 23:42:44 2009 |
Jenne | Update | IOO | New Input Mode Matching Telescope | I've got most of the new Mode Matching
Telescope figured out. The scripts
and an example result are at: MMT09 |
|
|
2436
|
Mon Dec 21 01:14:08 2009 |
rana | Summary | Electronics | Noise measurement of the Rai Weiss FET preamp box | I shorted the input to the box and
then put its output into the SR560 (low noise,
G = 100, AC). I put the output of the SR560 |
|
|
2437
|
Mon Dec 21 02:22:31 2009 |
rana, jenne, kiwamu | Update | ASS | OAF Model update and build instructions | This allowed measuring the MC1 -> MCL
TF finally. Its mostly flat. Data saved as
Templates/OAF/OAF-MCLTF.xml |
|
|
2438
|
Mon Dec 21 07:30:58 2009 |
??? | Update | ASS | OAF Model update and build instructions | What does OAF stand for? The entry
doesn't say that. Also the acronym is not
in the abbreviation page of the wiki. |
|
|
2439
|
Mon Dec 21 08:16:54 2009 |
steve | Metaphysics | PEM | jackhammering next door | At ITMX, on the CES side, 5 Ft from
the wall the jackhammer is on. The susses
are holding well. |
|
|
2440
|
Mon Dec 21 10:09:06 2009 |
jenne | Update | ASS | OAF Model update and build instructions | OAF stands for Online Adaptive Filtering.
We use the same computer which was once
the ASS. One of these days, we'd like to |
|
|
2441
|
Mon Dec 21 19:24:29 2009 |
rana | Update | ASS | OAF Model update and build instructions | I fit the MC1 -> MCL TF using vectfit4.m
(from mDV). The wrapper file is mDV/extra/C1/
fitMC12MCL.m. |
|
|
2442
|
Tue Dec 22 02:50:09 2009 |
rana, kiwamu, jenne | Update | ASS | OAF Feedaround ON and doing something good | Kiwamu made the OAF screen functional today
- screenshot attached.
After this, I used the measured TF |
|
|
2443
|
Tue Dec 22 10:04:41 2009 |
steve | Omnistructure | PEM | miracle in the 40m | We have been waiting for this for 20 some
years. Arrowhead water with cooler. AWESOME
THANKS Alan |
|
|
2444
|
Tue Dec 22 11:23:51 2009 |
kiwamu, Steve | Update | IOO | MC relocked | In this morning I found MC unlocked.
Steve restored the watchdogs before
I found that. |
|
|
2445
|
Tue Dec 22 13:14:37 2009 |
Alan | Omnistructure | PEM | miracle in the 40m |
|
|
|
2446
|
Tue Dec 22 15:49:31 2009 |
kiwamu | Update | General | e-log restarted | I found the e-log has been down around
3:40pm, then I restarted the e-log. Now it's
working. |
|
|
2447
|
Tue Dec 22 18:42:40 2009 |
Sanjit, Koji | Configuration | Adaptive Filtering | Readded DAQ channels to active list | Sometimes back we modified /cvs/cds/caltech/chans/daq/C1ASS.ini
to save some of the channels. The file was
reverted to default after the recent changes |
|
|
2448
|
Wed Dec 23 16:34:25 2009 |
Koji | Update | IOO | MCT QPD/MC REFL QPD disabled | For a certain investigation of the sum/diff
module for MCT QPD/MC REFL QPD, I removed
it from the system. |
|
|
2449
|
Wed Dec 23 17:33:14 2009 |
rana | Update | ASS | OAF Feedaround ON and doing something good | The Rai box ran out of batteries a couple
of days ago and so the data is no good. I've
put the Ranger back on the SR560 for now |
|
|
2450
|
Thu Dec 24 01:25:29 2009 |
kiwamu | Update | Electronics | impedance analyzing | The
validation for high impedance measurement
has been well done. |
|
|
2451
|
Thu Dec 24 19:13:29 2009 |
Koji | Update | IOO | MCT QPD investigation | I found that MCT QPD has a dependence of
the total output on the position of the spot.
Since the QPD needs the supply and bias voltages |
|
|
2452
|
Sat Dec 26 19:22:13 2009 |
Koji | Summary | General | Mode coupling of two astigmatic beams | In this note, amplitude and power couplings
of two astigmatic (0,0)-th order gaussian
modes are calculated. |
|
|
2453
|
Sun Dec 27 20:05:28 2009 |
kiwamu | Update | Computers | can not communicate with front-ends | In this evening I found that fb40m has
been down, then I restarted fm40m successfully.
|
|
|
2454
|
Sun Dec 27 23:44:59 2009 |
rana | Update | Electronics | MCT QPD investigation |
|
|
|
2455
|
Mon Dec 28 01:17:01 2009 |
Koji | Update | Electronics | MCT QPD investigation | Unfortunately, the signals for individual
segments also suffer from the voltage drop
as all of the low impedance amplifiers are |
|
|
2456
|
Mon Dec 28 10:29:31 2009 |
Jenne | Update | Computers | Monday Morning Bootfest | Nothing like a good ol' Bootfest to get
back into the swing of things after vacation....
It was a regular bootfest, keying |
|
|
2457
|
Mon Dec 28 12:35:57 2009 |
Jenne | Update | SUS | MC2 is having a bad day | MC2 is having a bad day, and I'm not yet
sure why. It's to do with the damping
though. When the damping is off, after |
|
|
2458
|
Mon Dec 28 12:45:55 2009 |
Koji | Update | SUS | MC2 is having a bad day | The MCL path of MC2 was in a strange state
as the filters were activated as if it is
in lock even though we had no lock. So I |
|
|
2459
|
Mon Dec 28 15:19:19 2009 |
Alberto | Update | Computers | Burtrestored to Dec 26 at 20:00 | Since it wasn't sure whether all the front-ends
had been restored after the bootfest, I burtrestored
everything to Dec 26 at 20:00. |
|
|
2460
|
Mon Dec 28 15:34:14 2009 |
Alberto | Update | ABSL | Working on the AP table | I opened the auxiliary laser's shutter.
I'm currently working on the AP table. |
|
|
2461
|
Mon Dec 28 18:35:27 2009 |
Alberto | Update | ABSL | Working on the AP table |
|
|
|
2462
|
Mon Dec 28 23:56:44 2009 |
kiwamu, rana | Update | Computers | add the HILO drift channels to the burt | The HIGH and LOW channels are added into
the burt request file "/target/c1losepics/autoBurt.req".
These values are used to colorize |
|
|
2464
|
Tue Dec 29 04:28:27 2009 |
kiwamu, rana, haixing | Update | Cameras | New Video Switch Installed | We have installed the new |
|
|
2465
|
Tue Dec 29 13:57:20 2009 |
Rana, Kiwamu, and Haixing | Update | Photos | Photos of video switch box | Before we installed the video switch box,
we also took some photos of it. We uploaded
them onto the 40m Picasa. |
|
|
2466
|
Wed Dec 30 09:57:53 2009 |
steve | Update | PSL | thirsty water chiller | I added 600 cc of Arrowhead Distilled Water
to the chiller.
60 days plot shows that about every |
|
|
2467
|
Wed Dec 30 10:58:48 2009 |
Alberto | Update | General | All watchdogs tripped this morning | This morning I found all the watchdogs
had tripped during the night.
I restored them all. |
|
|
2468
|
Wed Dec 30 18:01:03 2009 |
Alberto, Rana | Update | General | All watchdogs tripped this morning |
|
|
|
2469
|
Wed Dec 30 20:33:36 2009 |
rana, alberto | Configuration | Cameras | ITMY & MC2 Camera work | We
restored the good state of the ITMY camera |
|
|
2470
|
Wed Dec 30 22:17:07 2009 |
kiwamu | Update | General | Camera input and monitor output | The input channels of the cameras and
the output channels for the monitors are
summarized on the |
|
|
2471
|
Sun Jan 3 08:23:39 2010 |
rana | Configuration | CDS | autoburt.pl 'fixed' for post 2009 years | Tobin & Keith pointed out in the
LLO
ilog that there was a code bug |
|
|
2472
|
Mon Jan 4 09:52:40 2010 |
rana | Configuration | Cameras | ITMX camera and PSL channels | I
fixed up the ITMX camera like we did for
ITMY recently (removed T's and added strain |
|