| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
11084
|
Fri Feb 27 11:20:49 2015 |
ericq | Update | Computer Scripts / Programs | iPython Notebook for LSC Sensing Matrix |
|
|
|
11085
|
Fri Feb 27 14:17:51 2015 |
Steve | Update | safety | safety audit 2015 | Safety glasses were measured and they are
all good. I'd like to measure your personal
glass if it is not on this picture. |
|
|
11086
|
Fri Feb 27 21:16:10 2015 |
Jenne | Update | LSC | PRMI locked during CARM scan | Here are a bunch of PDFs of time series
from last night's CARM sweeps.
The y-axes are all calibrated (except for |
8x |
|
11087
|
Mon Mar 2 17:02:01 2015 |
ericq | Update | LSC | BS - PRM decoupling | Using PRX, I remeasured the relative actuation
strengths of the BS and PRM to see if the
PRM correction coefficient we're using |
|
|
11088
|
Mon Mar 2 18:34:12 2015 |
Jenne | Update | SUS | ETMX moving during single arm lock | This has been edited several times over
the last several hours, as I try to change
different parameters, to see if they affect |
|
|
11090
|
Tue Mar 3 04:41:45 2015 |
Jenne | Update | LSC | Transitioned DARM to AS55Q, some other work | Better elog tomorrow - notes for now:
REFL165 for PRMI has been "a
champ" (quote from Q). We're |
|
|
11092
|
Tue Mar 3 09:42:40 2015 |
Steve | Update | SUS | ETMX is drifting | The temperature of the east and south ends
are normal, they are about the same.
|
|
|
11093
|
Tue Mar 3 11:38:11 2015 |
Steve | Update | safety | professional crane inspection |
|
|
|
11094
|
Tue Mar 3 19:19:15 2015 |
ericq | Update | IOO | PC Drive / FSS Slow correlation | Jenne and I were musing the other night
that the PC drive RMS may have a "favorite"
laser temperature, as controlled by the FSS |
|
|
11095
|
Tue Mar 3 19:19:54 2015 |
Jenne | Update | LSC | Transitioned DARM to AS55Q, some other work | [Jenne, EricQ]
A slightly more coherent elog for
last night's work. |
|
|
11097
|
Wed Mar 4 03:42:14 2015 |
Jenne | Update | LSC | Tried a few CARM / ALS fool things, no success | Much of tonight was spent fighting with
ETMX. This time, ASC was definitely
off, there was nothing coming out of the |
|
|
11098
|
Wed Mar 4 19:03:19 2015 |
ericq | Update | LSC | Arm length remeasurement | As discussed at today's meeting, we
would like to (re)measure the Arm cavity
lengths to ~mm precision, and their g-factors. |
|
|
11099
|
Thu Mar 5 04:29:13 2015 |
ericq | Update | LSC | Locking work tonight | Brief elog of my activities tonight:
I was able to transition the digitial
CARM control to REFL11 through the common |
|
|
11100
|
Thu Mar 5 10:32:58 2015 |
Steve | Update | SUS | BS oplev servo turned off | The BS oplev servo was kicking up the BS.
It was turned off |
|
|
11101
|
Thu Mar 5 11:18:28 2015 |
manasa | Update | General | RF amplifier box | I pulled out the RF amplifier box from
the IOO rack and swapped the amplifiers
for FOL beat frequency amplification. The |
|
|
11102
|
Thu Mar 5 12:27:27 2015 |
manasa | Update | General | FOL fiber box on the PSL table | Working
around the PSL table
I have put the FOL |
|
|
11103
|
Thu Mar 5 19:13:17 2015 |
rana | Update | CDS | mxStream all restart at ~7:10 pm | |
|
|
11104
|
Thu Mar 5 20:44:30 2015 |
Jenne | Update | SUS | damprestore script updated | I just realized that the "damprestore"
script that can be called from the watchdog
screen did not have the new oplev names. |
|
|
11105
|
Thu Mar 5 21:42:05 2015 |
Jenne | Update | LSC | AS55Q flat at DARM zero crossing | I think we've seen this in simulations,
but it's a little disheartening to see
in real life. AS55Q looks like it flattens |
|
|
11107
|
Fri Mar 6 02:10:35 2015 |
rana | Update | LSC | Arm length remeasurement | This has been done before:
http://nodus.ligo.caltech.edu:8080/40m/6938
Arm length measurements and g-factor |
|
|
11108
|
Fri Mar 6 04:49:08 2015 |
Jenne | Update | LSC | AS55Q transition | [Jenne, Ranah]
We played around tonight with different
possible ways of transitioning DARM to normalized |
|
|
11110
|
Fri Mar 6 14:29:59 2015 |
manasa | Update | General | FOL troubleshooting | [EricQ, Manasa]
Domenica:
Since Domenica |
|
|
11111
|
Fri Mar 6 14:51:59 2015 |
ericq | Update | General | X arm linewidth, loss | The fit FWHM is 10.444kHz
+-55Hz. |
|
|
11113
|
Sat Mar 7 18:53:48 2015 |
Jenne | Update | LSC | DoF selector matrices replaced with filter banks | This is work that I did yesterday but didn't
have time to elog. Since it seems non-trivial
to give ourselves ramping matrices, but we |
|
|
11114
|
Sat Mar 7 19:15:17 2015 |
Jenne | Update | LSC | Modified zero crossing triggering | More work from yesterday.
Rana and I had discussed on Thursday
night that we probably want to be able to |
|
|
11115
|
Sat Mar 7 19:23:27 2015 |
Jenne | Update | LSC | Updated ALSwatch script | Last report on model change / screen work
from yesterday.
The ALSwatch script has always |
|
|
11119
|
Sun Mar 8 03:27:48 2015 |
Jenne | Update | LSC | Error signal blending for CARM/DARM transitions | This elog will be about work that happened
yesterday. I will write a reply to
this with work from this evening's success. |
|
|
11120
|
Sun Mar 8 04:04:19 2015 |
Jenne | Update | LSC | Error signal blending for CARM/DARM transitions | As I (very excitedly) reported in elog
11116, I was able to follow the error
signal blending procedure from last night, |
|
|
11121
|
Sun Mar 8 13:51:41 2015 |
rana | Update | LSC | Error signal blending for CARM/DARM transitions | According
to the official rules, we only need 8 seconds |
|
|
11122
|
Mon Mar 9 14:14:32 2015 |
Jenne | Update | LSC | Error signal blending for CARM/DARM transitions | Here is a longer stretch of data, from
the first RF-only lock on Saturday night.
Unfortunately daqd had died about 400 |
|
|
11123
|
Mon Mar 9 14:43:31 2015 |
manasa | Update | General | FOL troubleshooting | Figuring out the problem with
frequency counter readouts:
|
|
|
11125
|
Mon Mar 9 18:10:59 2015 |
Jenne | Update | ASC | Oplev filters re-copied | Back on Feb 20th (elog
11056) Q replaced all of our oplev parts
with the aLIGO version. |
|
|
11126
|
Tue Mar 10 03:37:03 2015 |
ericq | Update | LSC | Locking efforts | [Q,
J]
Not |
|
|
11127
|
Tue Mar 10 14:47:05 2015 |
manasa | Update | PSL | PMC relocked | PMC was locked in a bad state. FSS slow
actuator adjust was at ~ -0.7 and PZT voltage
at ~45. |
|
|
11128
|
Tue Mar 10 17:48:07 2015 |
manasa | Update | General | FOL troubleshooting | [Koji, Manasa]
This problem was solved by changing
the Frequency Counter range settings. |
|
|
11130
|
Tue Mar 10 20:08:23 2015 |
ericq | Update | CDS | cdsRampMuxMatrix Backported to 40m RCG | I have successfully backported the cdsRampMuxMatrix
part for use in our RCG v2.5 system.
This involved grabbing new files, merging |
|
|
11131
|
Wed Mar 11 13:54:18 2015 |
Steve | Update | General | temporaly storage in the east arm | Green glass for aLIGO OMC shield is temporarly
stored in the inside of the Y-arm. |
|
|
11132
|
Wed Mar 11 15:35:38 2015 |
manasa | Update | General | Waking up the PDFR measurement system | I was around the 1Y1 rack today. Trials
were done to get the PDFR of AS55.
|
|
|
11133
|
Wed Mar 11 18:02:02 2015 |
Jenne | Update | LSC | CARM and DARM loops marginal | I have looked at the CARM and DARM RF loops,
assuming the loop shapes that we've been
using, and it pretty much looks like a miracle |
|
|
11135
|
Wed Mar 11 19:48:25 2015 |
Koji | Update | General | FOL troubleshooting | There is a frequency counter code written
by the summer student.
The code needed some cleaning up. |
|
|
11136
|
Thu Mar 12 03:47:56 2015 |
Jenne | Update | LSC | CARM and DARM loop adjustments | No wins tonight.
I've tried playing with the
shapes of the loops a little bit (mostly |
|
|
11137
|
Thu Mar 12 11:57:38 2015 |
Koji | Update | General | FOL troubleshooting | BTW, during this trouble shoot, we looked
at the IR beatnote spectrum between the Xend
and the PSL. |
|
|
11138
|
Thu Mar 12 19:54:31 2015 |
Q | Update | LSC | How to: PRY | Q doesn't like elogging, but he sent
me this nice detailed email, so I'm copying
it into the log: |
|
|
11139
|
Fri Mar 13 03:10:35 2015 |
Jenne | Update | LSC | 6+ CARM->REFL transitions, 1 DARM->AS transition | Much more success tonight.
I only started my tally after I got the CARM |
|
|
11140
|
Fri Mar 13 14:11:59 2015 |
rana | Update | LSC | 6+ CARM->REFL transitions, 1 DARM->AS transition | Since the DARM_OUT signal is only 500 counts_peak,
I don't see why AS55 whitening needs
to be switched on. |
|
|
11141
|
Fri Mar 13 23:49:28 2015 |
rana | Update | PSL | Relaxation Osc and the NPRO Noise eater | Another thought about the mystery PCDRIVE
noise: we've been thinking that it could
be some slow death inside the NPRO, but it |
|
|
11142
|
Sat Mar 14 00:12:18 2015 |
rana | Update | SUS | Oplevs huh? | The oplev situation still seems unresolved
- notice this DTT. I guess there are still
inconsistencies in the screens / models etc. |
|
|
11143
|
Sat Mar 14 01:14:09 2015 |
Jenne | Update | LSC | More stable DARM transitions | [Jenne, Koji, Rana]
Thanks to turning off the AS55
analog whitening as well as the 1k:6k lead |
|
|
11144
|
Sun Mar 15 18:49:57 2015 |
Jenne | Update | LSC | More stable DARM transitions | I have modified the DARM model from elog
11133, to include the fact that these |
|
|
11150
|
Fri Mar 20 12:42:01 2015 |
Jenne | Update | IOO | Waking up the IFO | I've done a few things to start waking
up the IFO after it's week of conference-vacation.
PMC trans was at 0.679, aligned |
|