ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
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:
|
  |
11124
|
Mon Mar 9 16:50:35 2015 |
Champagne Duck | Frogs | Treasure | Celebrating Lock | |
|
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. |
|
11129
|
Tue Mar 10 19:59:13 2015 |
Koji | Frogs | Cameras | Message from the IFO | |
|
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 |
  |
11134
|
Wed Mar 11 19:15:03 2015 |
Koji | Summary | LSC | ROUGH calibration of the darm spectrum during the full PRFPMI lock | I made very rough calibration of
the DARM spectra before and after the transition
for the second lock on Mar 8. |
|
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 |
 |
11145
|
Thu Mar 19 14:37:17 2015 |
manasa | Configuration | IOO | IMC relocked | The autolocker was struggling to lock the
IMC. I disabled the autolocker and locked the
IMC manually. It seems happy right now. |
|
11147
|
Thu Mar 19 16:58:19 2015 |
Steve | Summary | IOO | MC alignment not drifting; PSL beam is drifting | Polaris mounts ordered.
|
|
11148
|
Thu Mar 19 17:11:32 2015 |
steve | Summary | SUS | oplev laser summary updated |
March 19, 2015 2
new JDSU 1103P, sn P919645 & P919639 |
|
11149
|
Fri Mar 20 10:51:09 2015 |
Steve | Summary | IOO | MC alignment not drifting; PSL beam is drifting | Are the two visible small srews holding
the adapter plate only?
If yes, it is the weakest point |
 |
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 |
|
11151
|
Fri Mar 20 13:29:33 2015 |
Koji | Update | IOO | Waking up the IFO | If the optics moved such amount, could
you check the PD alignment once the optics
are aligned? |
|
11152
|
Fri Mar 20 16:44:49 2015 |
ericq | Update | IOO | Waking up the IFO | X arm ASS is having some issues. ITMX
oplev was recentered with ITMX in a good
hand-aligned state. |
|
11153
|
Fri Mar 20 23:37:46 2015 |
Jenne | Update | SUS | Waking up the IFO | In addition to (and probably related to)
the XARM ASS not working today, the ITMX
has been jumping around kind of like ETMX |
|
11154
|
Sat Mar 21 05:19:49 2015 |
Jenne | Update | LSC | IFO awake | [Jenne, Den]
The problem with the ASS
turned out to be a mode that was rung up |
|
11155
|
Sun Mar 22 13:53:44 2015 |
rana | Update | SUS | ITMX alignment jumps | So, was there real shifting in the ITMX
alignment as seen in the DV trend or just
mis-diagnosis from the ETMX violin mode? |
|
11156
|
Sun Mar 22 18:42:40 2015 |
Steve | Update | VAC | vac pressure rose to 1.2mTorr |
|
 |
11158
|
Mon Mar 23 09:42:29 2015 |
Steve | Summary | IOO | 4" PSL beam path posts | To achive the same beam height each components
needs their specific post height.
|
  |
11159
|
Mon Mar 23 10:36:55 2015 |
ericq | Update | VAC | Pressure watch script | Based on Jenne's chiara disk usage
monitoring script, I made a script that checks
the N2 pressure, which will send an email |
|
11160
|
Mon Mar 23 13:27:33 2015 |
ericq | Update | SUS | ITMX oplev quadrant gains unbalanced | I've been poking around the oplev situation.
One thing I came across regarding ITMX was
that the gain on segment 4 seems to be about |
|
11161
|
Mon Mar 23 19:30:36 2015 |
rana | Update | Computer Scripts / Programs | rsync frames to LDAS cluster | The rsync job to sync our frames over to
the cluster has been on a 20 MB/s BW limit
for awhile now. |
|
11162
|
Mon Mar 23 22:56:54 2015 |
ericq | Update | Computer Scripts / Programs | Nodus web things | Back when Diego and I were getting all
of the web services running up on the new
nodus, we inexplicably were not able to get |
|
11163
|
Tue Mar 24 05:05:09 2015 |
ericq | Update | LSC | AO Path engaged | [J, Q]
Terse tonight, more verbose tomorrow.
We have succesfully achieved multiple |
 |
11164
|
Tue Mar 24 10:53:30 2015 |
manasa | Update | General | Scripts updated to the svn | I found that the scripts in FOL and PDFR
directories were not in the svn. These were
added to the svn. |
|
11166
|
Tue Mar 24 15:22:12 2015 |
manasa | Update | Computer Scripts / Programs | New slow channels for FOL | [Koji, Manasa]
I have created
new slow channels for FOL. |
|
11167
|
Tue Mar 24 18:22:11 2015 |
ericq | Update | LSC | AO Path engaged | For increased flatness of the AO response,
and thus less gain peaking in the CARM loop,
I reccomend turning down the MC servo VCO |
 |
11168
|
Tue Mar 24 18:47:10 2015 |
ericq | Update | LSC | AO Path engaged | Jenne has more detailed notes about how
things went down last night, but I figure
I should write about how we got the |
|
11169
|
Wed Mar 25 03:31:18 2015 |
Jenne | Update | LSC | Meh | [Jenne, Den]
Overall a "meh" night
for locking I think. The script to |
|
11170
|
Wed Mar 25 08:29:31 2015 |
Steve | Update | LSC | Meh | I turned on the HEPA at the south
end during the LSC. Sorry I ment to turn
it off. |
|
11171
|
Wed Mar 25 18:27:34 2015 |
Koji | Summary | General | Some maintainance | - I found that the cable for the AS55 LO
signal had the shielding 90% broken. It was
fixed. |
|