| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
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 |
|
|
14701
|
Wed Jun 26 18:28:24 2019 |
rana | Update | IOO | PMC and IMC locked again, some MEDM maintenance | a
useful piece of code that we should ask one |
|
|
14700
|
Wed Jun 26 11:11:40 2019 |
Milind | Update | IOO | PMC and IMC locked again, some MEDM maintenance | After helping Aaron key the crate and do
a burt restore, I realized that it would
probably be best to record the steps that |
|
|
14699
|
Wed Jun 26 10:55:13 2019 |
aaron | Update | IOO | PMC and IMC locked again, some MEDM maintenance | The PMC was locking again after Gautam's
steps above. However, after I added the directional
coupler between the mixer I and the servo |
|
|
14698
|
Tue Jun 25 23:52:37 2019 |
Milind | Update | Cameras | Simulation enhancements | Yesterday,
Rana asked me to look at Hiro Yamamoto's |
|
|
14697
|
Tue Jun 25 22:14:10 2019 |
Milind | Update | Cameras | Convolutional neural networks for beam tracking | I discussed this with Gautam and he asked
me to come up with a list of signals that
I would need for my use and then design the |
|
|
14696
|
Tue Jun 25 15:32:16 2019 |
gautam | Update | IOO | PMC and IMC locked again, some MEDM maintenance | Aaron complained to me earlier that the
PMC could not be locked. Turned out to be
a classic sticky slider problem, I keyed |
|
|
14695
|
Tue Jun 25 11:54:47 2019 |
Kruthi | Update | Cameras | GigE | Turns out, focusing the GigE is actually
a bit tricky. With pylon, everytime I change
the exposure or the focus, I'm running |
|
|
14694
|
Tue Jun 25 00:25:47 2019 |
Milind | Update | Cameras | Convolutional neural networks for beam tracking | In the previous meeting, Koji pointed out
(once again) that I should determine if the
displacement values and frames are synchronized |
8x |
|
14693
|
Mon Jun 24 15:49:05 2019 |
aaron | Update | IOO | IMC diagnostics | aI went to repeat these measurements using
the mixer out channel from the servo box,
and with a slower sweep for the PDH calibration. |
|
|
14692
|
Mon Jun 24 13:48:36 2019 |
Kruthi | Configuration | CDS | Giada wireless connection | [Gautam, Kruthi]
This afternoon, Gautam helped me
setup Giada to access the GigE installed |
|
|
14691
|
Mon Jun 24 11:48:35 2019 |
gautam | Update | IOO | IMC in-loop error spectra and OLTF | Attachment
#1 - In loop |
|
|
14690
|
Mon Jun 24 08:12:10 2019 |
gautam | Update | IOO | IMC is locking normally again | Over the last 24 hours, the IMC autolocker
was able to keep the MC locked ~60% of the
time. This is not particularly good, but |
|
|
14689
|
Sun Jun 23 14:43:14 2019 |
Koji | Update | IOO | IMC is locking normally again | Note that I have removed an SR785, an oscilloscope,
some SRS instruments from the PSL and PMC
last night. |
|
|
14688
|
Sun Jun 23 09:36:32 2019 |
gautam | Update | IOO | IMC is locking normally again | After typing up the elog, I decided to
try locking the IMC again - now it locks
again with the "OLD" gain settings. |
|
|
14687
|
Sun Jun 23 08:09:53 2019 |
gautam | Update | IOO | NPRO diagnostics | Summary:
Over the last few days, I've
been doing some (complementary) measurements |
|
|
14686
|
Fri Jun 21 19:36:26 2019 |
Koji | Update | IOO | IMC diagnostics | The IMC REFL error signal was measured
to compare it with the other spectra (if
we have). |
|
|
14685
|
Fri Jun 21 19:22:40 2019 |
Koji | Configuration | BHD | Reviving the single OMC BHD design? | I think a Faraday rotator rotates the polarizations
in a same way for both forward and backward
beam, and it's not like in this figure. |
|
|
14683
|
Wed Jun 19 19:12:51 2019 |
aaron | Update | IOO | IMC diagnostics | Here are the results from the fit. Data
can be found on nodus in /users/aaron/40m/data/PMC/190617/.
I've put a jupyter notebook with |
|
|
14682
|
Tue Jun 18 22:54:59 2019 |
Milind | Update | Cameras | Convolutional neural networks for beam tracking | Worked further on this. I skimmed through
a few resources to look for details of what
pre-processing can be done. Here |
|
|
14681
|
Tue Jun 18 20:35:07 2019 |
aaron | Update | IOO | IMC diagnostics | I made a script (/users/aaron/40m/GPIB/tds_dump.py)
that grabs data from a Tektronix scope and
packages into a pickled dict with the following |
|
|
14680
|
Mon Jun 17 22:19:04 2019 |
Milind | Update | Computer Scripts / Programs | PMC autolocker | As Rana asked me to in the last meeting,
I dug through the elogs to determine what
had become of the previous autolockers. I |
|
|
14679
|
Mon Jun 17 16:02:17 2019 |
aaron | Update | Computers | keyed PSL crate | Milind pointed out that all boxes on the
medm screens were white. I didn't have
diagnostics from the medm screens, so I started |
|
|
14678
|
Mon Jun 17 14:36:13 2019 |
Milind | Update | Cameras | Convolutional neural networks for beam tracking | Begun setting up an environment (as mentioned
before, on my local machine) and scripts
to run experiments with Convolutional |
|
|
14677
|
Mon Jun 17 12:37:16 2019 |
aaron | Update | IOO | IMC diagnostics | Grabbed the PMC data
I went
to set up the spectrum analyzer measurements
through GPIB, but inadvertently deleted the |
|
|
14676
|
Sat Jun 15 00:03:26 2019 |
Kruthi | Update | Cameras | GigE setup | The analog camera is aligned and we are
able to see all the 4 OSEMs (pictures attached).
Due to secondary reflection from the |
|
|
14675
|
Fri Jun 14 13:10:00 2019 |
aaron | Update | IOO | IMC diagnostics | The circuit diagram for the PMC servo card
is D980352.
From this diagram, I see that I can send |
|
|
14674
|
Fri Jun 14 00:40:33 2019 |
Kruthi | Update | Cameras | GigE setup | Today, I tried aligning it further; I'm
attaching a picture of it. We are not able
to see all the 4 OSEMs yet. In the reference |
|