| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
14133
|
Sun Aug 5 13:28:43 2018 |
gautam | Update | CDS | c1lsc flaky | Since the lab-wide
computer shutdown last Wednesday, all
the realtime models running on c1lsc have |
|
|
14134
|
Sun Aug 5 13:45:00 2018 |
gautam | Update | SUS | ETMX tripped | Independent from the problems the vertex
machine has been having (I think, unless
it's something happening over the shared |
|
|
14135
|
Sun Aug 5 15:43:50 2018 |
gautam | Update | SUS | Another low noise bias path idea | OK, how about this:
Attachment |
|
|
14136
|
Mon Aug 6 00:26:21 2018 |
gautam | Update | CDS | More CDS woes | I spent most of today fighting various
CDS errors.
I rebooted c1lsc around |
|
|
14137
|
Mon Aug 6 09:34:02 2018 |
Steve | Update | VAC | RGA scan at day 20 |
|
|
|
14139
|
Mon Aug 6 14:38:38 2018 |
gautam | Update | CDS | More CDS woes | Stability was short-lived it seems. When
I came in this morning, all models on c1lsc
were dead already, and now c1sus is also |
|
|
14140
|
Mon Aug 6 19:49:09 2018 |
gautam | Update | CDS | More CDS woes | I've left
the c1lsc frontend shutdown for now, |
|
|
14141
|
Mon Aug 6 20:41:10 2018 |
aaron | Update | DAQ | New DAC for the OMC | Gautam and I tested out the DAC that he
installed in the latter half of last week.
We confirmed that at least one of the channels |
|
|
14142
|
Tue Aug 7 11:30:46 2018 |
gautam | Update | CDS | More CDS woes | Overnight, all models on c1sus and c1ioo
seem to have had no stability issues, supporting
the hypothesis that timing issues stem from |
|
|
14143
|
Tue Aug 7 22:28:23 2018 |
gautam | Update | CDS | More CDS woes | I am starting the c1x04 model (IOP) on
c1lsc to see how it behaves overnight.
Well, there was apparently an immediate |
|
|
14144
|
Tue Aug 7 23:06:30 2018 |
Koji | Update | PSL | EOM measuement preparation | I was preparing for the aLIGO EOM measuement
to be carried out tomorrow afternoon.
I did a few modifications to the |
|
|
14145
|
Wed Aug 8 20:56:11 2018 |
Koji | Update | PSL | EOM measuement preparation | Rich and I worked on the EOM measurement.
After the measurement, the setup was reverted
to the nominal state |
|
|
14146
|
Wed Aug 8 23:03:42 2018 |
gautam | Update | CDS | c1lsc model started | As part of this slow but systematic debugging,
I am turning on the c1lsc model overnight
to see if the model crashes return. |
|
|
14147
|
Wed Aug 8 23:06:59 2018 |
gautam | Update | SUS | Another low noise bias path idea | Today while Rich Abbott was here, Koji
and I had a brief discussion with him about
the HV amplifier idea for the coil driver |
|
|
14148
|
Thu Aug 9 02:12:13 2018 |
gautam | Update | COC | South East or West? | Summary:
For operating the SRC in the "Signal-Recycled"
tuning, the SRC macroscopic length needs |
|
|
14149
|
Thu Aug 9 12:31:13 2018 |
gautam | Update | CDS | CDS status update | The model seems to have run without issues
overnight. Not completely related, but the
MC1 shadow sensor signals also don't |
|
|
14150
|
Thu Aug 9 12:40:14 2018 |
gautam | Update | SUS | ETMX trip follow-up | A brief follow-up on this since we discussed
this at the meeting yesterday: the attached
DV screenshot shows the full 2k data for |
|
|
14151
|
Thu Aug 9 22:50:13 2018 |
gautam | Update | CDS | AlignSoft script modified | After this
work of increasing the series resistance
on ETMX, there have been numerous occassions |
|
|
14152
|
Fri Aug 10 01:10:56 2018 |
gautam | Update | LSC | Some vertex locking restored | For
the first time after the whirlwind vent, |
|
|
14156
|
Mon Aug 13 09:56:23 2018 |
Steve | Update | SUS | ETMX trip follow-up | Here is an other big one
|
|
|
14157
|
Mon Aug 13 11:44:32 2018 |
gautam | Update | Computer Scripts / Programs | Patch updates on nodus | Larry W said that some security issues
were flagged on nodus. So I ran
|
|
|
14159
|
Mon Aug 13 20:21:10 2018 |
aaron | Update | OMC | New DAC for the OMC | [aaron, gautam]
We finished up making the new c1omc
model (screenshot attached). |
|
|
14160
|
Tue Aug 14 00:27:55 2018 |
gautam | Update | LSC | Locking prep | In preparation for attempting some DRMI
locking, I did the following:
Slow machine reboots for |
|
|
14161
|
Tue Aug 14 00:50:32 2018 |
gautam | Update | ASS | X arm ASS still not quite right? | While working on the single arm alignment,
I noticed that today, i was able to get the
X arm transmission back to ~1.22, and the |
|
|
14162
|
Tue Aug 14 02:01:12 2018 |
gautam | Update | LSC | DRMI locking - partial success | After tweaking the AS55 demod phase, SRM
alignment, triggering settings, I got a few
brief |
|
|
14163
|
Tue Aug 14 23:14:24 2018 |
aaron | Update | OMC | OMC scanning/aligning script | I made a script to scan the OMC length
at each setpoint for the two TTs steering
into the OMC. It is currently located on |
|
|
14164
|
Wed Aug 15 12:15:24 2018 |
gautam | Update | COC | Macroscopic SRC length for SR tuning | Summary:
It |
|
|
14165
|
Wed Aug 15 19:18:07 2018 |
gautam | Update | SUS | Another low noise bias path idea | I took another pass at this. Here is what
I have now:
Attachment |
|
|
14166
|
Wed Aug 15 21:27:47 2018 |
gautam | Update | CDS | CDS status update | Starting c1cal
now, let's see if the other c1lsc FE
models are affected at all... Moreover, since |
|
|
14167
|
Thu Aug 16 07:50:28 2018 |
Steve | Update | VAC | pumpdown 81 at day 30 |
|
|
|
14168
|
Thu Aug 16 14:48:14 2018 |
Steve | Update | VAC | why do we need a root pump? |
Basic Pump Throughput Concepts
What
is Pump Throughput?
The manufacturer |
6x |
|
14169
|
Thu Aug 16 23:06:50 2018 |
gautam | Update | SUS | Another low noise bias path idea | I had a very fruitful discussion with Rich
about this circuit today. He agreed
with the overall architecture, but made the |
|
|
14171
|
Mon Aug 20 15:16:39 2018 |
Jon | Update | CDS | Rebooted c1lsc, slow machines | When I came in this morning no light was
reaching the MC. One fast machine was
dead, c1lsc, and a number of the slow machines: |
|
|
14173
|
Tue Aug 21 09:16:23 2018 |
Steve | Update | Wiki | AP table layout 20180821 |
|
|
|
14176
|
Wed Aug 22 08:44:09 2018 |
Steve | Update | General | earth quake | 6.2M Bandon, OR did not trip any sus
|
|
|
14178
|
Thu Aug 23 08:24:38 2018 |
Steve | Update | SUS | ETMX trip follow-up | Glitch, small amplitude, 350 counts
& no trip.
|
|
|
14179
|
Thu Aug 23 15:26:54 2018 |
Jon | Update | IMC | MC/PMC trouble | I tried unsuccessfully to relock the MC
this afternoon.
I came in to find it in a trouble |
|
|
14180
|
Thu Aug 23 16:05:24 2018 |
Koji | Update | IMC | MC/PMC trouble | I don't know what had been wrong, but
I could lock the PMC as usual.
The IMC got relocked by AutoLocker. |
|
|
14181
|
Thu Aug 23 16:10:13 2018 |
not Koji | Update | IMC | MC/PMC trouble | Great, thanks!
|
|
|
14182
|
Fri Aug 24 08:04:37 2018 |
Steve | Update | General | small earth quake |
|
|
|
14183
|
Fri Aug 24 10:51:23 2018 |
Steve | Update | VAC | pumpdown 81 at day 38 |
|
|
|
14184
|
Fri Aug 24 14:58:30 2018 |
Steve | Update | SUS | ETMX trips again | The second big glich trips ETMX sus. There
were small earth quakes around the glitches.
It's damping recovered. |
|
|
14185
|
Mon Aug 27 09:14:45 2018 |
Steve | Update | PEM | small earth quakes | Small earth quakes and suspensions. Which
one is the most free and most sensitive:
ITMX |
|
|
14187
|
Tue Aug 28 18:39:41 2018 |
Jon | Update | CDS | C1LSC, C1AUX reboots | I found c1lsc unresponsive again today.
Following the procedure in elog
#13935, I ran the rebootC1LSC.sh |
|
|
14188
|
Wed Aug 29 09:20:27 2018 |
Steve | Update | SUS | local 4.4M earth quake | All suspension tripped. Their damping restored.
The MC is locked.
ITMX-UL & side magnets are |
|
|
14189
|
Wed Aug 29 09:56:00 2018 |
Steve | Update | VAC | Maglev controller needs service | TP-1 Osaka maglev controller [
model TCO10M, ser V3F04J07 ]
needs maintenance. Alarm led on indicating |
|
|
14190
|
Wed Aug 29 11:46:27 2018 |
Jon | Update | SUS | local 4.4M earth quake | I freed ITMX and coarsely realigned the
IFO using the OPLEVs. All the alignments
were a bit off from overnight. |
|
|
14191
|
Wed Aug 29 14:51:05 2018 |
Steve | Update | General | tomorrow morning | Electrician is coming to fix one of the
fluorenent light fixture holder in the east
arm tomorrow morning at 8am. He will be out |
|
|
14192
|
Tue Sep 4 10:14:11 2018 |
gautam | Update | CDS | CDS status update | c1lsc crashed again. I've contacted
Rolf/JHanks for help since I'm out of
ideas on what can be done to fix this |
|
|
14193
|
Wed Sep 5 10:59:23 2018 |
wgautam | Update | CDS | CDS status update | Rolf came by today morning. For now, we've
restarted the FE machine and the expansion
chassis (note that the correct order in which |
|