| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
14754
|
Thu Jul 11 18:15:22 2019 |
gautam | Summary | Electronics | PSL/IOO rack checkout | I looked at the PSL/IOO racks to check
for which boards, if any, require an additional
P2 interface, so that we can try and design |
|
|
14753
|
Thu Jul 11 17:58:38 2019 |
gautam | Update | Equipment loan | TT suspension --> Downs | Arnaud has taken 1 TT suspension from the
40m clean lab to Downs for modal testing.
Estimated time of return is tomorrow evening. |
|
|
14752
|
Thu Jul 11 16:22:54 2019 |
Kruthi | Update | General | Projector lightbulb blown out | I heard a popping sound in the control
room; the projector lightbulb has blown out. |
|
|
14750
|
Thu Jul 11 13:09:22 2019 |
gautam | Summary | CDS | P2 interface board | it will connect to a 15 pin breakout board
in the Acromag chassis
|
|
|
14749
|
Thu Jul 11 13:08:36 2019 |
Chub | Summary | CDS | P2 interface board | It's nice and compact, and the cost
of new 15-pin DSUB cables shouldn't be
a factor here. What does the 15p cable |
|
|
14747
|
Thu Jul 11 12:42:35 2019 |
gautam | Summary | CDS | P2 interface board | I looked into the design of the P2 interface
board. The main difficulty here is geometric
- we have to somehow accommodate sufficient |
|
|
14746
|
Wed Jul 10 22:32:38 2019 |
Milind | Update | Cameras | Convolutional neural networks for beam tracking | I trained a bunch (around 25 or so - to
tune hyperparameters) of networks today.
They were all CNNs. They all produced garbage. |
|
|
14745
|
Wed Jul 10 16:53:22 2019 |
gautam | Update | SUS | PRM watchdog condition modified | [koji, gautam]
We noticed that the PRM watchdog
was tripping frequently. This is a period |
|
|
14744
|
Wed Jul 10 14:57:01 2019 |
Koji | Summary | CDS | Channel recipe for iscaux upgrade | The list of the iscaux channels
and pin assignments were posted to google
drive. |
|
|
14743
|
Wed Jul 10 14:55:32 2019 |
Koji | Update | General | Projector lightbulb blown out | In fact the projector is still working.
The lamp timer showed ~8200hrs. I just reset
the timer, but not sure it was the cause |
|
|
14742
|
Wed Jul 10 10:04:09 2019 |
gautam | Update | SUS | Tip-Tilt moved from South clean cabinet to bake lab cleanroom | Arnaud and I moved one of the two spare
TT suspensions from the south clean cabinet
to the bake lab clean room. The main purpose |
|
|
14741
|
Tue Jul 9 22:13:26 2019 |
Milind | Update | Cameras | Convolutional neural networks for beam tracking | I received access today. After some incredible
hassle, I was able to set up my repository
and code on the remote system. Following |
|
|
14740
|
Tue Jul 9 18:42:15 2019 |
gautam | Update | ALS | EX green doubling oven temperature controller power was disconnected | There was no green light even though the
EX NPRO was on. I checked the doubling oven
temperature controller and found that its |
|
|
14739
|
Tue Jul 9 18:17:48 2019 |
gautam | Update | General | Projector lightbulb blown out | Last documented
replacement in Nov 2018, so ~7 months, which
I believe is par for the course. I am disconnecting |
|
|
14738
|
Tue Jul 9 18:06:05 2019 |
gautam | Update | LSC | Y-arm ASS in a workable state | The Y-arm ASS was tuned to be in a workable
state. Basically, I followed Koji's recipe. |
|
|
14737
|
Tue Jul 9 10:37:42 2019 |
Milind | Update | IOO | keyed psl crate, unstick.py, pmc autolocker code- working | Today, Gautam keyed the C1PSL crate and
we got to test my unstick.py code. It seems
to be working fine. Remarks: |
|
|
14736
|
Tue Jul 9 08:33:31 2019 |
gautam | Summary | SUS | ETMX PIT bias voltage changed by ~1V | After this activity, the DC bias voltage
required on ETMX to restore good X arm cavity
alignment has changed by ~1.3 V. Assuming |
|
|
14735
|
Mon Jul 8 21:42:39 2019 |
rana | Update | Cameras | Ghost image due to beamsplitter | you have to use a BS with a larger
wedge angle (5 arcmin ~ 1 mrad) so that
the beams don't overlap on the camera |
|
|
14734
|
Mon Jul 8 17:52:30 2019 |
Milind | Update | Cameras | Convolutional neural networks for beam tracking | After the two earthquakes, I collected
some data by dithering the optic and recording
the QPD readings. Today, I set up scripts |
|
|
14733
|
Mon Jul 8 17:33:10 2019 |
Kruthi | Update | Loss Measurement | Optical scattering measurements | I came across a paper (see reference) where
they have used DAOPHOT, an astronomical software
tool developed by NOAO, to study the point |
|
|
14732
|
Sun Jul 7 21:59:28 2019 |
Kruthi | Update | Cameras | Ghost image due to beamsplitter | The beam splitter (BS1-1064-33-2037-45S) that
is currently being used has an antireflection
coating on the second surface and a wedge |
|
|
14731
|
Sun Jul 7 17:54:34 2019 |
Milind | Update | Computer Scripts / Programs | PMC autolocker | I modified the autolocker code I wrote
to read from a .yaml configuration file instead
of commandline arguements (that option still |
|
|
14730
|
Fri Jul 5 23:28:52 2019 |
rana, kruthi | Summary | SUS | ETMX unstuck by shaking the stack | We unstuck ETMX by shaking the stack. Most
effective was to apply large periodic human
sized force to the north STACIS mounts. |
|
|
14729
|
Fri Jul 5 22:21:13 2019 |
Koji | Update | SUS | Another M7.1 EQ | In fact, ETMX was not stuck until the M7.1
EQ today. After that it got stuck, but during
the after shocks, all the OSEMs occasionally |
|
|
14728
|
Fri Jul 5 21:53:10 2019 |
Koji | Update | SUS | Another M7.1 EQ | - ITM
unstuck now
- IMC briefly locked at TEM00 |
|
|
14727
|
Fri Jul 5 20:57:04 2019 |
Koji | Update | SUS | Another M7.1 EQ | [Kruthi, Koji]
Koji came to the lab to align the
IMC/IFO, but found the mirrors are dancing |
|
|
14726
|
Thu Jul 4 18:19:08 2019 |
Milind | Update | Cameras | Convolutional neural networks for beam tracking | The quoted elog has figures which indicate
that the network did not learn (train or
generalize) on the used data. This is a scary |
|
|
14725
|
Thu Jul 4 10:54:21 2019 |
Koji | Summary | SUS | Suspension damping recovered, ITMX stuck | So Cal Earthquake. All suspension
watchdogs tripped.
Tried to recover the OSEM damping. |
|
|
14724
|
Thu Jul 4 10:47:37 2019 |
Milind | Update | General | Earthquake now | There was a magnitude 6.6 earthquake just
a few minutes ago. I am attaching photographs
of the monitor feeds for reference here. |
|
|
14723
|
Wed Jul 3 23:53:38 2019 |
Milind | Update | Cameras | data for nns | Tried collecting data today. Was unable
to keep the camera_server code running for
any length of time as it threw segfaults. |
|
|
14722
|
Wed Jul 3 11:47:36 2019 |
gautam | Update | BHD | PRC filtering | A question was raised as to how much passive
filtering we benefit from if we pick off
the local oscillator beam for BHD from the |
|
|
14721
|
Tue Jul 2 19:36:18 2019 |
aaron | Update | IOO | IMC diagnostics | The latest in my fling with the PMC. Though
PMC trans is back to nominal levels (~0.713
V), we'd still like to understand the |
|
|
14720
|
Tue Jul 2 17:34:54 2019 |
gautam | Update | LSC | Irides opened up on EY table | In preparation for the ASS debugging, I decided |
|
|
14719
|
Tue Jul 2 16:57:09 2019 |
gautam | Update | CDS | c1sus is flaky | Since the work earlier this morning, the
fast c1sus model has crashed ~5 times. Tried
rebooting vertex FEs using the reboot script |
|
|
14718
|
Tue Jul 2 12:30:53 2019 |
gautam | Update | Electronics | Acromag crate switched to Sorensens | [chub, gautam]
We crossed off another couple of |
|
|
14717
|
Tue Jul 2 12:30:44 2019 |
Milind | Update | Computer Scripts / Programs | PMC autolocker | Just finished a raw version of the autolocker!!
Tested it once and was able to achieve lock!
This is a python version of the code at /opt/rtcds/caltech/c1/scripts/PSL/PMC/AutoLock.sh. |
|
|
14716
|
Mon Jul 1 20:27:44 2019 |
gautam | Update | ASC | ASX tuning | Summary:
To practise the dither alignment
servo tuning, I decided to make the ASX system |
|
|
14715
|
Mon Jul 1 20:18:01 2019 |
Milind | Update | Computer Scripts / Programs | PMC autolocker | I've begun working on this. Steps to
complete:
Convert the autolocker |
|
|
14714
|
Mon Jul 1 20:11:34 2019 |
Milind | Update | Cameras | Simulation enhancements | Today, I read a lot more about BRDF and
modelling but could not make much headway
regarding the implementation in the simulation. |
|
|
14713
|
Mon Jul 1 11:02:05 2019 |
Milind | Update | IOO | PMC and IMC locked again, some MEDM maintenance | Made changes as discussed in this
issue. Further, I need to add signal handling
capabilities to the code. I belive Jon has |
|
|
14712
|
Sun Jun 30 23:52:09 2019 |
Koji | Update | IOO | PMC and IMC locked again, some MEDM maintenance | > For channels corresponding
to continuous values (such as say exposure
time or the like) changes to abs(1+current_value) |
|
|
14711
|
Sun Jun 30 22:21:07 2019 |
Milind | Update | IOO | PMC and IMC locked again, some MEDM maintenance | Wrote the script. It currently lives at
/users/milind/NonlinearControl/milind/unstick/unstick.py.
Also pushed it to the repo here. |
|
|
14710
|
Sun Jun 30 22:02:26 2019 |
Milind | Update | Cameras | Keyed c1aux crate | I wanted to try out the unstick.py script
on c1aux but kept running into timeout errors.
I was also confronted by a blank GigE screen. |
|
|
14709
|
Sun Jun 30 19:47:09 2019 |
rana | Update | IOO | IMC WFS agenda | we are thinking of doing a sprucing up
of the input mode cleaner WFS (sensors +
electronics + feedback loops) |
|
|
14708
|
Sat Jun 29 03:11:18 2019 |
Kruthi | Update | Cameras | CCD Calibration | Finding the gain of the Photodiode:
The three-position rotary switch of the photodiode
being used (PDA520) wasn't working, so |
|
|
14706
|
Thu Jun 27 20:48:22 2019 |
Milind | Update | Cameras | Convolutional neural networks for beam tracking | And
finally, a network is trained!
Result summary (TLDR :-P) |
|
|
14705
|
Thu Jun 27 14:28:12 2019 |
gautam | Update | LSC | POX and POY locking | After a more systematic alignment effort,
I was able to get the spots better centered
on the optics (judged by eye from the analog |
|
|
14704
|
Wed Jun 26 21:01:26 2019 |
gautam | Update | LSC | POX and POY locking | Now that the IMC is remaining locked for
extended periods of time, the next problem
to attack is the ASS dither alignment system. |
|
|
14703
|
Wed Jun 26 20:45:03 2019 |
gautam | Update | Cameras | Field of view options | For the beam spot position tracking, I
am wondering if there is any benefit to going
for a wider field of view and getting the |
|
|
14702
|
Wed Jun 26 19:12:00 2019 |
Kruthi | Update | Cameras | GigE | The GigE is focused now (judged by eye)
and I have closed the lid. I'm attaching
a picture of the MC2 beam spot, captured |
|