| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
2178
|
Thu Nov 5 05:07:22 2009 |
rana | Update | LSC | X Arm Cavity transfer Function | I would have guessed that you have to calibrate
the detectors relative to each other before
trying this. Its also going to be tricky |
|
|
2206
|
Mon Nov 9 01:52:56 2009 |
rana | Update | PEM | coherence v. time for 2 accelerometers | I used the coh_carpet.m function from
the mDV to calculate this plot:
|
|
|
2231
|
Tue Nov 10 21:46:31 2009 |
rana | Summary | Computers | Test Point Number Mapping |
|
|
|
2247
|
Thu Nov 12 02:02:18 2009 |
rana | Summary | LSC | Arm Locking with no feedback to the ETM or ITM | Steps:
1) Turn off feedback to ETMY (the
ETMY button on the LSC screen). |
|
|
2283
|
Tue Nov 17 15:54:34 2009 |
rana | Summary | PEM | 40 days of weather | the inside temperature is alarming at the
red level today - should check if the HIHI
value is set correctly |
|
|
2286
|
Tue Nov 17 21:10:35 2009 |
rana | Summary | Electronics | Busby Low Noise Box: Photos and Upgrades | |
|
|
2288
|
Wed Nov 18 00:38:33 2009 |
rana | Summary | Electronics | Voltage Noise of the SR560's OUTPUTs (the back panel) | I've
measured the voltage noise of the SR560's
lead acid battery outputs; they're not so |
|
|
2289
|
Wed Nov 18 01:12:15 2009 |
rana | Update | PEM | seismometers were not saturating during Halloween weekend | |
|
|
2304
|
Fri Nov 20 00:18:45 2009 |
rana | Summary | Cameras | Video MUX Selection Wiki page | Steve is summarizing the Video Matrix
choices into this Wiki page:
http://lhocds.ligo-wa.caltech.edu:8000/40m/Electronics/VideoMUX |
|
|
2319
|
Tue Nov 24 08:00:16 2009 |
rana | Update | LSC | Measured MC length | I propose that from now on, we indicate
in the elog what frequencies we're referring
to. In this case, I guess its the front panel |
|
|
2335
|
Wed Nov 25 16:13:27 2009 |
rana | Update | PSL | Measured MC length--FSS trend | but the increase in both the RCtrans and
the RCrefl is consistent with my theory that
the power going to the RC has increased ; |
|
|
2342
|
Fri Nov 27 02:25:26 2009 |
rana | Update | ABSL | PLL Open Loop Gain Measured |
|
|
|
2398
|
Fri Dec 11 14:12:32 2009 |
rana | Configuration | LSC | 166 LO Disconnected |
Seems like very strange cable
loss numbers. The Heliax is lossier than |
|
|
2403
|
Sat Dec 12 07:36:56 2009 |
rana | HowTo | Electronics | How to Measure the Length of a Cable: Interferometry | Need to measure the length |
|
|
2406
|
Sun Dec 13 20:50:45 2009 |
rana | Summary | IOO | Mach Zender Calibration | I ramped the MZ PZT (with the loop disabled
on the input switch) to calibrate it. Since
the transmission has been blocked, I used |
|
|
2407
|
Sun Dec 13 23:18:09 2009 |
rana | Summary | IOO | Displacement noise on the PSL table | For the Laser Gyro, I wondered how much
mechanical noise we might get with a non-suspended
cavity. My guess is that the PMC is better |
|
|
2417
|
Tue Dec 15 00:02:10 2009 |
rana | Update | PEM | Noise of the Ranger SS-1 Seismometer | I wanted to see what the noise of the Ranger
seismometer should be. I used LISO and file
ranger.fil (in our LISO SVN) to calculate |
|
|
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. |
|
|
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 |
|
|
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 |
|
|
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. |
|
|
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 |
|
|
2454
|
Sun Dec 27 23:44:59 2009 |
rana | Update | Electronics | MCT QPD investigation |
|
|
|
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 |
|
|
2478
|
Tue Jan 5 11:00:04 2010 |
rana | Omnistructure | Environment | Added new wall cable-racks |
|
|
|
2518
|
Sun Jan 17 05:22:42 2010 |
rana | Configuration | Computers | ELOG script change | With Dave Barker's help, I changed the
elog startup script. Instead of running as
a Daemon with the -D option, |
|
|
2524
|
Tue Jan 19 00:10:44 2010 |
rana | Update | Electronics | triple resonant circuit for EOM | Very cool. |
|
|
2547
|
Tue Jan 26 03:28:56 2010 |
rana | Update | ABSL | 166 MHz sideband turned off |
You can turn the 166 off if
you want. MZ is unhappy after its turned |
|
|
2549
|
Tue Jan 26 20:18:32 2010 |
rana | Configuration | ALARM | op540m: alarms and BLRMS and StripTool restored | I turned the StripTool and ALARMS and BLRMS
back on on op540m. Looks like it has been
rebooted 5 days ago and no one turned these |
|
|
2569
|
Thu Feb 4 00:59:52 2010 |
rana | Update | elog | elog restarted | I restarted the ELOG on NODUS just
now. Our attempt to set up error logging
worked - it turns out ELOG was choking |
|
|
2593
|
Thu Feb 11 19:20:44 2010 |
rana | Update | Computers | Status of the IP change over | After Joe left:
Turned on op440m and returned him
his keyboard and mouse.
Damped |
|
|
2620
|
Sun Feb 21 17:44:35 2010 |
rana | Update | General | Prep for Power Supply Stop | [LIST]
[*] Turned on the RAID attached to linux1
(its our /cvs/cds disk)
|
|
|
2621
|
Mon Feb 22 07:25:58 2010 |
rana | Update | General | Prep for Power Supply Stop | Autoburts have not been |
|
|
2634
|
Tue Feb 23 16:42:02 2010 |
rana | Configuration | Computer Scripts / Programs | SVN restarted on NODUS | I ran the start Apache script as described
by Yoichi in the WIki. SVN back up. |
|
|
2645
|
Sun Feb 28 16:45:05 2010 |
rana | Summary | General | Power ON Recovery |
Turned ON the RAID above linux1.
Hooked up a monitor and keyboard and
then turned ON linux1.
After |
|
|
2646
|
Sun Feb 28 23:47:52 2010 |
rana | Update | Computers | rosalba | Since Rosalba wanted to update ~500
packages, I let it do it. This, of course,
stopped the X server from running. I downloaded |
|
|
2649
|
Mon Mar 1 22:38:12 2010 |
rana | Update | Computers | RC sensitivity to RIN | The overnight triangle wave I ran on the
AOM drive turns out to have produced no signal
in the FAST feedback to the PZT. |
|
|
2657
|
Thu Mar 4 22:07:21 2010 |
rana | Update | 40m Upgrading | 11MHz PD not yet designed | Use 10 Ohms for the resistance - I have
never seen a diode with 25 Ohms.
p.s. PDFs can be joined together |
|
|
2659
|
Fri Mar 5 18:04:56 2010 |
rana | Update | SUS | used OSEMs are magnetic | The OSEM LEDs and PDs from Honeywell have
always had some ferromagnetic material in
them. These are the same OSEMs we had since |
|
|
2660
|
Sun Mar 7 07:01:21 2010 |
rana | Update | WienerFiltering | Guralp Huddle Test software | We need to do a new huddle test of the
Guralps for the Wiener filtering paper. The
last test had miserable results. |
|
|
2661
|
Sun Mar 7 23:05:39 2010 |
rana | Update | PEM | Seismic witnesses near MC1 tank moved |
|
|
|
2662
|
Mon Mar 8 18:15:27 2010 |
rana | Update | PEM | Styrofoam Cooler on the Seismos | I put Jenne's
cooler over the seismometers |
|
|
2666
|
Wed Mar 10 15:02:58 2010 |
rana | Update | PEM | Styrofoam Cooler on the Seismos | This is the spectra and coherence from
a quiet time last night. I've lowered the
Guralp cal by a factor of 2 to account for |
|
|
2671
|
Sat Mar 13 21:30:22 2010 |
rana | Update | PEM | Styrofoam Cooler on the Seismos | |
|
|
2672
|
Sat Mar 13 22:16:03 2010 |
rana | Update | WienerFiltering | Guralp Huddle Test software | I used some recent better data to try for
better Z subtraction.
Dmass helped me understand that sqrt(1-Coherence) |
|
|
2686
|
Fri Mar 19 21:15:33 2010 |
rana | Update | PEM | Guralp2 centered again | This trend of the last 200 days shows that
GUR2 has been bad forever...until now anyways.
|
|
|
2687
|
Fri Mar 19 23:03:41 2010 |
rana | Update | PEM | Guralp2 centered again | I went and double-checked and aligned the
styrofoam cooler at ~5:00 UTC. It was fine,
but we really need a better huddling box. |
|
|
2689
|
Sun Mar 21 19:25:29 2010 |
rana | Update | PEM | Guralp2 centered again | From this morning, now in calibrated units,
and with the Güralp self noise spec
from the Güralp manual. |
|