| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
13537
|
Fri Jan 12 10:02:05 2018 |
johannes | Update | DAQ | etmx slow daq chassis |
Quote:
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|
|
13536
|
Thu Jan 11 21:09:33 2018 |
gautam | Update | CDS | revisiting Acromag | We'd like to setup the recording of
the PSL diagnostic connector Acromag channels
in a more robust way - the objective is to |
|
|
13535
|
Thu Jan 11 20:59:41 2018 |
gautam | Update | DAQ | etmx slow daq chassis | Some suggestions of checks to
run, based on the rightmost colum in the
wiring diagram here |
|
|
13534
|
Thu Jan 11 20:51:20 2018 |
gautam | Update | ALS | Fiber ALS assay | After labeling cables I would disconnect,
I pulled the box out of the LSC rack. Attachment
#1 is a picture of the insides of the box |
|
|
13533
|
Thu Jan 11 18:50:31 2018 |
gautam | Update | IOO | MCautolocker getting stuck | I've noticed this a couple of times
today - when the autolocker runs the |
|
|
13532
|
Thu Jan 11 14:47:11 2018 |
Steve | Update | PSL | shelf work for tomorrow | I have just received the scheduling of
the PSL self work for tomorrow. Gautam and
I agreed that if it is needed I will shut |
|
|
13531
|
Thu Jan 11 14:22:40 2018 |
gautam | Update | ALS | Fiber ALS assay | I did a cursory check of the ALS signal
chain in preparation for commissioning the
IR ALS system. The main elements of this |
|
|
13530
|
Thu Jan 11 09:57:17 2018 |
Steve | Update | DAQ | acromag at ETMX | Good going Johannes!
|
|
|
13529
|
Wed Jan 10 22:24:28 2018 |
johannes | Update | DAQ | etmx slow daq chassis | This evening I transitioned the slow controls
to c1auxex2.
Disconnected satellite |
|
|
13528
|
Wed Jan 10 22:19:44 2018 |
rana | Update | SUS | ETMX DC alignment | Best to just calibrate the ETM OL in the
usual way. I bet the OSEM outputs have a
cal uncertainty of ~50% since the input matrix |
|
|
13527
|
Wed Jan 10 18:53:31 2018 |
gautam | Update | SUS | ETMX DC alignment | I should've put in the SUSPIT and SUSYAW
channels in the previous screenshot. I re-aligned
ETMX till I could see IR flashes in the arm, |
|
|
13526
|
Wed Jan 10 16:27:02 2018 |
Steve | Configuration | SEI | load cell for weight measurement | We could use similar
load cells to make the actual
weight measurement on the Stacis legs. This |
|
|
13525
|
Wed Jan 10 15:25:43 2018 |
johannes | Configuration | Computer Scripts / Programs | autoburt making backups again |
Quote:
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|
|
13524
|
Wed Jan 10 14:17:57 2018 |
johannes | Configuration | Computer Scripts / Programs | autoburt no longer making backups | I was looking into setting up autoburt
for the new c1auxex2 and found that it stopped
making automatic backups for all machines |
|
|
13523
|
Wed Jan 10 12:42:27 2018 |
gautam | Update | SUS | ETMX DC alignment | I've been observing this for a few
days: ETMX's DC alignment seems to drift
by so much that the previously |
|
|
13522
|
Wed Jan 10 12:24:52 2018 |
gautam | Update | CDS | slow machine bootfest | MC autolocker got stuck (judging by wall
StripTool traces, it has been this way for
~7 hours) because |
|
|
13521
|
Wed Jan 10 09:49:28 2018 |
Steve | Update | PEM | the rat is back | Five mechcanical traps set inside of boxes.
Red-white warning tape on top of each.
|
|
|
13520
|
Tue Jan 9 21:57:29 2018 |
gautam | Update | Optimal Control | Oplev loop tuning | After some more tweaking, I feel like I
may be getting closer to a cost-function
definition that works. |
|
|
13519
|
Tue Jan 9 21:38:00 2018 |
gautam | Update | ALS | ALS recovery |
Aligned IFO to IR.
Ran
dither alignment to maximize arm transmission.
Centered
Oplev reflections onto their respective QPDs |
|
|
13518
|
Tue Jan 9 11:52:29 2018 |
gautam | Update | CDS | slow machine bootfest | Eurocrate key turning reboots today morning
for and |
|
|
13517
|
Tue Jan 9 00:07:03 2018 |
johannes | Update | DAQ | etmx slow daq chassis | All parts received and assembly near complete,
small problem detected because the two DSub
connectors are too close together for two |
|
|
13516
|
Mon Jan 8 20:50:01 2018 |
rana | Summary | Electronics | SR560: reworking | I replaced the NPD5565 with a LSK389 (SOIC-8
with DIP adapter). There was a noise reduction
of ~30%, but not nearly as much as I expected. |
|
|
13515
|
Sun Jan 7 20:11:54 2018 |
Koji | Update | PonderSqueeze | Displacement requirements for short-term squeezing | In fact, that is my point. If we use signal
recycling instead of resonant sideband extraction,
the "tuning" of the SRC is opposite |
|
|
13514
|
Sun Jan 7 17:27:13 2018 |
gautam | Update | PonderSqueeze | Displacement requirements for short-term squeezing | Maybe you've accounted for this already
in the Optickle simulations - but in Finesse
(software), the "tuning" corresponds |
|
|
13513
|
Sun Jan 7 11:40:58 2018 |
Kevin | Update | PonderSqueeze | Displacement requirements for short-term squeezing | Yes, this SRC detuning is very close to
extreme signal recycling (0° in this
convention), and the homodyne angle is close |
|
|
13512
|
Sun Jan 7 03:22:24 2018 |
Koji | Update | PonderSqueeze | Displacement requirements for short-term squeezing | Interesting. My understanding is that this
is close to signal recycling, rather than
resonant sideband extraction. Is that correct? |
|
|
13511
|
Sat Jan 6 23:25:18 2018 |
Kevin | Update | PonderSqueeze | Displacement requirements for short-term squeezing |
|
|
|
13510
|
Sat Jan 6 18:27:37 2018 |
gautam | Update | General | power outage - IFO recovery | Mostly back to nominal operating conditions
now.
EX TransMon QPD is not |
|
|
13509
|
Sat Jan 6 13:47:32 2018 |
rana | Update | PonderSqueeze | Displacement requirements for short-term squeezing |
ought to tune for 210 Hz (in-between
powerlines) since 100 Hz is tough to work
due to scattering, etc.
rename |
|
|
13508
|
Sat Jan 6 05:18:12 2018 |
Kevin | Update | PonderSqueeze | Displacement requirements for short-term squeezing | I have been looking into whether we can
observe squeezing on a short timescale. The
simulations I show here say that we can get |
|
|
13507
|
Fri Jan 5 22:19:53 2018 |
gautam | Update | General | power outage - timing error | Just putting the relevant line from email
from Rolf which at least identifies the problem
here: |
|
|
13506
|
Fri Jan 5 21:54:28 2018 |
rana | Update | General | power outage - timing error | Rolf came here in the morning, but not
sure what he did or if Jamie remotely did
something. But the screen is green. |
|
|
13505
|
Fri Jan 5 19:19:25 2018 |
rana | Configuration | SEI | Barry Controls 'air puck' instead of 'VOPO style' breadboard | We've been thinking about putting in
a blade spring / wire based aluminum breadboard
on top of the ETM & ITM stacks to get |
|
|
13504
|
Fri Jan 5 17:50:47 2018 |
rana | Configuration | Computers | motif on nodus | I had to do 'sudo yum install motif'
on nodus so that we could get libXm.so.4
so that we could run MEDM. Works now. |
|
|
13503
|
Thu Jan 4 14:39:50 2018 |
gautam | Update | General | power outage - timing error | As mentioned in my previous elog, the CDS
overview screen "DC" indicators
are all RED (everything else is green). Opening |
|
|
13502
|
Thu Jan 4 12:46:27 2018 |
gautam | Update | ALS | Fiber ALS assay | Attachment
#1 is the updated |
|
|
13501
|
Wed Jan 3 18:00:46 2018 |
gautam | Update | PonderSqueeze | plan of action | Notes
of stuff we discussed @ today's meeting,
and afterwards, towards measuring ponderomotive |
|
|
13500
|
Wed Jan 3 16:25:32 2018 |
awade | Update | Optimal Control | Oplev loop tuning | Another cool feature
is client side pre-commit hooks. |
|
|
13499
|
Wed Jan 3 15:13:55 2018 |
Steve | Update | General | projector light bulb replaced | Bulb
is replaced.
|
|
|
13498
|
Wed Jan 3 12:33:16 2018 |
rana | Update | Optimal Control | Oplev loop tuning | When putting code into git.ligo.org, one
way to have automated testing is to use the
Gitlab CI. This is an automated 'checker', |
|
|
13497
|
Tue Jan 2 16:37:26 2018 |
gautam | Update | Optimal Control | Oplev loop tuning | I've made various changes to the optimal
loop design approach, but am still not having
much success. A summary of changes made: |
|
|
13496
|
Tue Jan 2 16:24:29 2018 |
gautam | Update | safety | Projector periodically shuts itself off | I noticed this behaviour since ~Dec 20th,
before the power failure. The bulb itself
seems to work fine, but the projector turns |
|
|
13495
|
Tue Jan 2 15:43:35 2018 |
Steve | Update | VAC | pumpdown after power outage |
|
|
|
13494
|
Sun Dec 31 12:43:50 2017 |
rana | Summary | Electronics | SR560: reworking | I have
ordered some LSK389A (in both the SOIC-8
and TO-71 packages) to replace the SR560's |
|
|
13493
|
Thu Dec 28 17:22:02 2017 |
gautam | Update | General | power outage - CDS recovery |
I had to manually reboot c1lsc,
c1sus and c1ioo.
I edited the
line in /etc/rt.sh (specifically, on FB /diskless/root.jessie/etc/rt.sh) |
|
|
13492
|
Tue Dec 26 17:24:24 2017 |
Steve | Update | General | power outage | There was a power outage.
The IFO pressure is 12.8 mTorr-it
and it is not pumped. V1 is still closed. |
|
|
13491
|
Fri Dec 22 09:40:19 2017 |
rana | Summary | General | DAC noise contribution to squeezing noise budget |
Should not count the ITMs. On those
we can use big resistors / filters to cut
out the noise.
For the initial |
|
|
13490
|
Thu Dec 21 19:25:48 2017 |
Kevin | Summary | General | DAC noise contribution to squeezing noise budget | Gautam and I redid our calculations, and
the updated plot of squeezing as a function
of DAC current noise per coil is shown in |
|
|
13489
|
Wed Dec 20 00:43:58 2017 |
Kevin | Summary | General | DAC noise contribution to squeezing noise budget | Gautam and I looked into the DAC noise
contribution to the noise budget for homodyne
detection at the 40m. DAC noise is currently |
|
|
13488
|
Mon Dec 18 20:37:18 2017 |
gautam | Update | PSL | PMC MEDM cleanup | There are fewer lies on this screen now.
For reference, the details of the electronics
modifications made are in this |
|