| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
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, |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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, |
|
|
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 |
|
|
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 |
|
|
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: |
|
|
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 |
|
|
12798
|
Sat Feb 4 12:20:39 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. |
|
|
12800
|
Sat Feb 4 12:50:01 2017 |
jamie | Summary | CDS | /cvs/cds/caltech/chans back on svn1.6 |
|
|
|
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 |
|
|
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. |
|
|
12803
|
Mon Feb 6 15:18:08 2017 |
gautam | Update | CDS | slow machine bootfest | Had to reboot c1psl,
c1susaux, c1auxex, c1auxey |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
12808
|
Tue Feb 7 16:23:49 2017 |
Steve | Update | General | power interruption tomorrow |
received this note: at 4:11pm Tuesday, Feb
7, 2017 |
|
|
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 |
|
|
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 |
|
|
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
|
|
|
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 |
|
|
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. |
|
|
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. |
|
|
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 |
|
|
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. |
|
|
12817
|
Fri Feb 10 11:41:43 2017 |
Lydia | Update | IMC | 29.5 MHz stabilizer box replacement | To install the replacement amplifier, I
did the following:
Mounted the amplifier in |
|
|
12818
|
Fri Feb 10 13:04:32 2017 |
rana | Update | IOO | MC AutoLocker hung because c1iool0 asleep again | c1iool0 was down again. Rather than key
the crate, this time I just pushed the reset
button on the front and it came back. |
|
|
12819
|
Fri Feb 10 13:24:28 2017 |
rana | Update | IMC | 29.5 MHz stabilizer box replacement | To remind myself about how to put filter
caps on the mini-circuits RF Amps, I looked
at Koji's recent |
|
|
12820
|
Fri Feb 10 18:21:21 2017 |
gautam | Update | IMC | IMC Demod board | Rana and I spent some time looking at the
IMC demod board earlier today. I will post
the details shortly, but there was a label |
|
|
12821
|
Fri Feb 10 19:32:15 2017 |
Koji | Update | IMC | IMC Demod board | The input impedance of the mixer is not
constant. As the diode switches, it changes
dynamically. Because of this, the waveform |
|
|
12822
|
Sun Feb 12 01:16:57 2017 |
gautam | Update | IMC | IMC length loop - summary of changes | 29.5 MHz RF Modulation Source
|
|
|
12823
|
Mon Feb 13 11:55:14 2017 |
rana | Update | IMC | IMC length loop - summary of changes | I would think that we want to fix
the I/Q orthog inside the demod board by
trimming the splitter. Mixing |
|
|
12824
|
Mon Feb 13 13:34:44 2017 |
gautam | Update | IMC | IMC length loop - bad SMA cable replaced | I was a little confused why the In1 Gain
had to be as high as +10dB - before the changes
to the RF chain, we were using +27dB, and |
|
|
12825
|
Mon Feb 13 17:19:41 2017 |
yinzi | Configuration | | configuring ethernet for raspberry pi | Gautam and I were able to get the Raspberry
Pi up and running today, including being
able to ssh into it from the control room. |
|
|
12826
|
Mon Feb 13 17:39:45 2017 |
Ashley | Update | General | Preliminary Microphone Data Update |
Problems that have occurred since
my last post: All of the sudden, I was getting
very strange data that was very quiet and |
|
|
12827
|
Mon Feb 13 19:44:55 2017 |
Lydia | Update | IMC | Front panel for 29.5 MHz amplifier box | I made a tentative front panel design for
the newly installed amplifier box. I used
this chassis |
|
|
12828
|
Tue Feb 14 10:43:06 2017 |
gautam | Bureaucracy | Equipment loan | Equipment to Cryo Lab | PZT |
|
|
12829
|
Wed Feb 15 00:26:44 2017 |
Johannes | Update | DAQ | panels and pcbs | I finished designing the PCBs for the VME
crate back sides (see attached). The project
files live on the DCC now at https://dcc.ligo.org/LIGO-D1700058. |
|
|
12830
|
Wed Feb 15 09:06:13 2017 |
ericq | Update | DAQ | panels and pcbs | The amplifier unit should use the three
pin dsub connectors (3w3?) that we use on
many of the other units for DC power, and |
|
|
12831
|
Wed Feb 15 22:16:05 2017 |
Max Isi | Update | Summary Pages | New condor_q format | There has been a change in the default
format for the output of the condor_q command
at CIT clusters. This could be problematic |
|
|
12832
|
Wed Feb 15 22:21:12 2017 |
Lydia | Update | DAQ | panels and pcbs | This is already how it's hooked up.
The hole on the from that says +24 V is for
an indicator light. |
|
|
12833
|
Wed Feb 15 23:54:13 2017 |
gautam | Update | IMC | IMC saga continues... | Following
the discussion at the meeting today, I wanted
to finish up the WFS tuning and then hand |
|
|
12834
|
Thu Feb 16 13:29:38 2017 |
gautam | Summary | General | Alternative Calibration Scheme | Summary:
Craig and I have been trying to
put together a Simulink diagram of the proposed |
|
|
12835
|
Thu Feb 16 21:55:47 2017 |
rana | Summary | General | Alternative Calibration Scheme | Question for Craig: What does the SNR of
our lines have to be? IF we're only trying
to calibrate the actuator in the audio band |
|
|
12836
|
Fri Feb 17 10:56:12 2017 |
steve | Update | PEM | particle counter moved into PSL enclousure | The MET#1 particle counter was moved from
CES wall at ITMX to PSL enclousure south
west corner at 11am. |
|
|
12837
|
Fri Feb 17 20:04:43 2017 |
Koji | Update | General | Projector not functional / Zita partially working | Koji, Gautam, Johannes
We quickly checked the situation
of the projector in the control room. |
|