| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
12816
|
Fri Feb 10 02:14:10 2017 |
gautam | Update | IMC | 29.5 MHz stabilizer box replacement | Lydia finished up installing the new RF
amplifier, and will elog the details of the
installation. |
|
|
12815
|
Thu Feb 9 23:35:34 2017 |
gautam | Update | IMC | MCL Feedback - TF measurements | Here are the details as promised.
Attachment #1: Updated
simulink model. Since I haven't actually |
|
|
12814
|
Thu Feb 9 11:22:56 2017 |
gautam | Update | General | Sorensens and DIN connections at 1X1 | I'd like to fix a few things at 1X1
when we plug in the new amplifier for the
29.5MHz modulation signal. |
|
|
12813
|
Thu Feb 9 08:03:08 2017 |
Steve | Update | General | USB microscope ordered | http://www.amscope.com/3-5x-180x-boom-stand-trinocular-zoom-stereo-microscope-with-144-led-ring-light-and-10mp-camera.html
will be ordered today. |
|
|
12812
|
Wed Feb 8 19:13:02 2017 |
gautam | Update | IMC | MCL Feedback - TF measurements | Quick summary elog, details to follow.
I did the following:
Updated the Simulink model |
|
|
12811
|
Wed Feb 8 10:16:39 2017 |
steve | Update | SUS | clipping ITMX oplev | The ITMX oplev beam is clipping. It will
be corected with locked arm
|
|
|
12810
|
Tue Feb 7 19:14:59 2017 |
Johannes | Update | CDS | vme crate backplane adapter board layout | After fighting with Altium for what seems
like an eternity I have finished putting
my vision of the vme crate backplane adapter |
|
|
12809
|
Tue Feb 7 17:00:55 2017 |
Lydia | Update | IMC | 29.5 MHz stabilizer box replacement | I set everything up and connected it as
shown on the block diagram attached to the
previous entry, with the exception |
|
|
12808
|
Tue Feb 7 16:23:49 2017 |
Steve | Update | General | power interruption tomorrow |
received this note: at 4:11pm Tuesday, Feb
7, 2017 |
|
|
12807
|
Tue Feb 7 12:01:10 2017 |
Lydia | Update | IMC | 29.5 MHz stabilizer box replacement | I tested the amplifier with the Agilent
network analyzer and measured 19.5 dB
of gain between 29 and 30 mHz. The phase |
|
|
12806
|
Tue Feb 7 10:18:58 2017 |
gautam | Update | IMC | MC REFL weirdness | A few minutes back, I glanced up at the
control room StripTool and noticed that the
MCREFL PD DC level had gone up from ~0 to |
|
|
12805
|
Mon Feb 6 18:20:08 2017 |
Koji | Update | IMC | MCL Feedback - simulink model updated | It is more accurate to model the physical
frequency noises at various places.
cf. See also 40m ALS paper or Shigeo |
|
|
12804
|
Mon Feb 6 17:03:41 2017 |
gautam | Update | IMC | MCL Feedback - simulink model updated | I've edited Rana's Simulink model
to reflect the current IMC servo topology
(to the best of my understanding). I've |
|
|
12803
|
Mon Feb 6 15:18:08 2017 |
gautam | Update | CDS | slow machine bootfest | Had to reboot c1psl,
c1susaux, c1auxex, c1auxey |
|
|
12802
|
Mon Feb 6 10:05:28 2017 |
Steve | Update | SUS | clamped cables | The bottom 5 cable connections from Sat-Amp
to Whittering Filter at 1X5 were clamped
today. |
|
|
12801
|
Sun Feb 5 21:56:50 2017 |
Lydia | Update | IMC | 29.5 MHz stabilizer box replacement | Since the "stablizer box" doesn't
really need to stabilize, it just needs to
amplify, I decided to replace it with an |
|
|
12800
|
Sat Feb 4 12:50:01 2017 |
jamie | Summary | CDS | /cvs/cds/caltech/chans back on svn1.6 |
|
|
|
12799
|
Sat Feb 4 12:29:20 2017 |
jamie | Summary | CDS | /cvs/cds/caltech/chans back on svn1.6 | No, not confused on that point. We just
will not be testing OS versions at the 40m
or running multiple OS's on our workstations. |
|
|
12798
|
Sat Feb 4 12:20:39 2017 |
jamie | Summary | CDS | /cvs/cds/caltech/chans back on svn1.6 |
|
|
|
12797
|
Sat Feb 4 12:00:59 2017 |
rana | Summary | CDS | /cvs/cds/caltech/chans back on svn1.6 | True - its an issue. Koji and I are updating
zita into Ubuntu16 LTS. If it looks like
its OK with various tools we'll swap |
|
|
12796
|
Fri Feb 3 11:40:34 2017 |
ericq | Summary | CDS | /cvs/cds/caltech/chans back on svn1.6 | I was able to bring back svn 1.6 formatting
to /cvs/cds/caltech/chans by doing the following
on nodus: |
|
|
12795
|
Fri Feb 3 11:40:09 2017 |
rana | Update | IMC | MCL Feedback - framing the problem | In working on automatic DARM loop design,
we have this code:
https://git.ligo.org/rana-adhikari/ModernControls/tree/master/OptimalFeedback/GlobalCost |
|
|
12794
|
Fri Feb 3 11:03:06 2017 |
jamie | Update | CDS | more testing fb1; DAQ DOWN DURING TEST | More testing of fb1 today. DAQ DOWN
UNTIL FURTHER NOTICE.
Testing Wednesday did not resolve |
|
|
12793
|
Fri Feb 3 00:36:52 2017 |
gautam | Update | IMC | MCL Feedback - framing the problem | Rana
motivated me to take a step back and reframe
the objectives and approach for this project, |
|
|
12792
|
Thu Feb 2 18:32:51 2017 |
rana | Summary | PSL | PMC alignment | Re-aligned the beam going into the PMC
today around 5 PM. I noticed that its all
in pitch and since I moved both of the mirrors |
|
|
12791
|
Thu Feb 2 18:28:29 2017 |
rana | Summary | CDS | Minute Trend Koan | and the song remains the same...
the version of SVN on these workstations
is ahead of the one on the other workstations |
|
|
12790
|
Thu Feb 2 17:43:20 2017 |
gautam | Update | PEM | EM172 mic is hooked up in the PSL | I had noticed something wonky with the
microphone, but neglected to elog it. I had
tested it after installation by playing a |
|
|
12789
|
Thu Feb 2 17:34:25 2017 |
rana | Update | PEM | EM172 mic is hooked up in the PSL | I don't know if anyone looked at the
time series (not trend) or spectrum of the
Microphone after installation, but it looks |
|
|
12788
|
Thu Feb 2 12:17:48 2017 |
Steve | Update | General | USB microscope | This
AmScope microscope would have 3.5x-180x
magnification, calibratable measurement function, |
|
|
12787
|
Thu Feb 2 11:25:45 2017 |
Max Isi | Update | Summary Pages | Cluster maintenance | FYI this issue has still not been solved,
but the pages are working because I got the
software running on an
|
|
|
12786
|
Wed Feb 1 23:13:30 2017 |
Lydia | Update | IMC | RF AM stabilizer box Modification Plan | I made some of the changes. Gautam and
I will finish tomorrow.
While I was soldering the sharpest |
|
|
12785
|
Wed Feb 1 20:49:34 2017 |
rana | Update | IMC | RF AM stabilizer box Modification Plan | I suggest:
Disable the path which
goes to the two spare outputs. Replace the |
|
|
12784
|
Wed Feb 1 16:45:56 2017 |
Lydia | Update | IMC | RF AM stabilizer box Modification Plan | Here's what I'm planning to do
to the RF AM stabilizer box. I'm
going to take out several of the components |
|
|
12783
|
Wed Feb 1 11:51:19 2017 |
Koji | Update | IMC | RF AM stabilization box pulled out | For a comparison: OMC
ELOG 238 |
|
|
12782
|
Tue Jan 31 22:28:39 2017 |
Lydia | Update | IMC | RF AM stabilization box pulled out | [rana, gautam, lydia]
Today we looked at the schematics
for the RF AM stabilizer box and decided |
|
|
12781
|
Tue Jan 31 22:15:02 2017 |
Johannes | Update | CDS | vme crate backplane adapter boards | I made a crude sketch for how Lydia and
I envision the connector situation on the
back of the vme crates to be solved. Essentially |
|
|
12780
|
Tue Jan 31 22:07:13 2017 |
gautam | Update | IMC | RF AM stabilization box revamp | I've added the schematic of the RF
AM stabilization board to the 40m
PSL document tree, after having created |
|
|
12779
|
Tue Jan 31 20:25:26 2017 |
ericq | Summary | CDS | Minute Trend Koan |
|
|
|
12778
|
Tue Jan 31 18:51:07 2017 |
gautam | Update | SEI | Seismic Rainbow Strip - myths debunked | I've been suggesting that there may
be something wonky with the Seismic Rainbow
Striptool on the wall for the last couple |
|
|
12777
|
Tue Jan 31 17:28:36 2017 |
rana | Summary | CDS | Minute Trend Koan | Someone installed "Debian" on
allegra. Why? Dataviewer doesn't work
on there. Is there some advantage to making |
|
|
12776
|
Tue Jan 31 15:08:13 2017 |
ericq | Metaphysics | CDS | Minute Trend Koan | A novice was learning at the feet of Master
Daqd. At the end of the lesson he looked
through his notes and said, “Master, |
|
|
12775
|
Tue Jan 31 14:17:48 2017 |
gautam | Update | IMC | RF AM stabilization box pulled out | > What
is the probe situation? Ought to use a high
impedance FET probe to measure this or else |
|
|
12774
|
Tue Jan 31 14:14:29 2017 |
rana | Update | VAC | Pressure watch script | I think this cron job is running on NODUS
(our gateway) instead of our scripts machine:
p.p1 {margin: |
|
|
12773
|
Tue Jan 31 13:46:34 2017 |
rana | Update | IMC | RF AM stabilization box pulled out |
What is the probe situation? Ought
to use a high impedance FET probe to measure
this or else the scope would load the circuit.
The |
|
|
12772
|
Tue Jan 31 01:07:20 2017 |
Lydia | Update | IMC | RF AM stabilization box pulled out | [gautam, Lydia]
We looked at the RF AM stabilizer
box to see if we could find out 1) Why the |
|
|
12771
|
Mon Jan 30 19:07:48 2017 |
gautam | Update | IMC | RF AM stabilization box pulled out | [johannes, gautam]
We pulled out the RF AM stabilization
box from the 1X2 rack. PSL shutter was closed, |
|
|
12770
|
Mon Jan 30 18:41:41 2017 |
jamie | Update | CDS | TEST ABORTED of new daqd code on fb1 | I just aborted the fb1 test and reverted
everything to the nominal configuration.
Everything looks to be operating nominally. |
|
|
12769
|
Sat Jan 28 12:05:57 2017 |
jamie | Update | CDS | test of new daqd code on fb1 |
|
|
|
12768
|
Sat Jan 28 01:25:51 2017 |
gautam | Update | IMC | 29.5 MHz modulation depth | Some more details of our investigation:
Here is a spectrum of the
signal to the power combiner on the PSL table, |
|
|
12767
|
Fri Jan 27 21:25:11 2017 |
Lydia | Update | IMC | 29.5 MHz modulation depth | [gautam, Lydia]
We set out to measure the 29.5
MHz power going to the EOM today but decided |
|