| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
12743
|
Fri Jan 20 14:42:12 2017 |
Steve | Update | PEM | Caltech weather station | We should be able to connect to this station |
|
|
12744
|
Fri Jan 20 17:12:37 2017 |
Steve | Update | PEM | EM172 mic is hooked up in the PSL | Gautam and Steve,
It is hanging in the midle of the
PSL enclosure. Wired to 1X1 to get plus and |
|
|
12745
|
Mon Jan 23 10:24:01 2017 |
Steve | Update | SUS | MC1 SUS electronics investigation | Two day plot of glitching suspentions:
MC3, ITMY and ETMX |
|
|
12746
|
Mon Jan 23 15:16:52 2017 |
gautam | Update | Optical Levers | ETMY Oplev HeNe needs to be replaced | On the control room monitors, I noticed
that the IR TEM00 spot was moving around
rather a lot in the Y arm. The |
|
|
12747
|
Mon Jan 23 17:24:26 2017 |
Steve | Update | Optical Levers | ETMY Oplev HeNe is running hot | ETMY He/Ne 1103P body temp is
~45 C The laser was seated loosely
in the V-mount with black rubber padding. |
|
|
12749
|
Tue Jan 24 07:36:56 2017 |
Max Isi | Update | Summary Pages | Cluster maintenance | System-wide CIT LDAS cluster maintenance may
cause disruptions to summary pages today.
|
|
|
12750
|
Tue Jan 24 17:52:15 2017 |
Craig | Update | Optical Levers | ETMY Oplev HeNe is replaced | Steve, Craig, Gautam
Today Steve replaced the ETMY He/Ne
sr P919645 OpLev laser with sr P947049 and |
6x |
|
12751
|
Wed Jan 25 01:27:45 2017 |
gautam | Update | IMC | IMC feedforward checkup | This is probably just a confirmation of
something we discussed a couple of weeks
back, but I wanted to get more familiar with |
|
|
12752
|
Wed Jan 25 09:00:39 2017 |
Max Isi | Update | Summary Pages | Cluster maintenance | LDAS has not recovered from maintenance causing
the pages to remain unavailable until further
notice.
|
|
|
12754
|
Wed Jan 25 14:30:20 2017 |
gautam | Update | CDS | slow machine bootfest | [gautam, lydia]
We rebooted c1psl, |
|
|
12755
|
Wed Jan 25 15:41:29 2017 |
Lydia | Update | IMC | 29.5 MHz modulation depth measurement plan | [Lydia, gautam]
To measure the modulation depth
of the 29.5 MHz sideband, we plan to connect |
|
|
12756
|
Wed Jan 25 17:30:03 2017 |
Koji | Update | IMC | 29.5 MHz modulation depth measurement plan | I'm afraid that the bidirectional coupler,
designed to be 50ohm in/out, disturbs the
resonant circuit designed for the EOM which |
|
|
12758
|
Wed Jan 25 19:39:07 2017 |
gautam | Update | IMC | 29.5 MHz modulation depth measurement plan | Just collecting some links from my elog
searching today here for easy reference later.
EOM datasheet: Newfocus |
|
|
12760
|
Fri Jan 27 14:50:04 2017 |
Steve | Update | SUS | wire standoffs update | The 3 pieces of Sapphire
v-groove test cuts are back. They look
good. The suspension wire 0.0017" ( |
|
|
12761
|
Fri Jan 27 15:36:17 2017 |
Koji | Update | SUS | wire standoffs update | Very nice! I got excited.
Don't you ask Calum
and co to check the groove size with their |
|
|
12762
|
Fri Jan 27 17:07:52 2017 |
Lydia | Update | CDS | slow machine bootfest | Rebooted c1iscaux,
c1auxex and c1auxey which were all
not reponding to telnet. The watchdogs for |
|
|
12763
|
Fri Jan 27 17:49:41 2017 |
jamie | Update | CDS | test of new daqd code on fb1 | Just FYI I'm running a test of updated
daqd code on fb1.
fb1 has it's own fiber to the |
|
|
12765
|
Fri Jan 27 20:52:36 2017 |
gautam | Update | CDS | test of new daqd code on fb1 | I'm not sure if this is related, but
since today morning, I've noticed that
the data concentrator errors have returned. |
|
|
12766
|
Fri Jan 27 21:21:35 2017 |
gautam | Update | CDS | c1pem revamped | The coil and PD BLRMS are useful tools
in identifying when glitches occur in the
PD readout, I thought it would be good |
|
|
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 |
|
|
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, |
|
|
12769
|
Sat Jan 28 12:05:57 2017 |
jamie | Update | CDS | test of new daqd code on fb1 |
|
|
|
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. |
|
|
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, |
|
|
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 |
|
|
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 |
|
|
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: |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
12783
|
Wed Feb 1 11:51:19 2017 |
Koji | Update | IMC | RF AM stabilization box pulled out | For a comparison: OMC
ELOG 238 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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
|
|
|
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 |
|
|
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 |
|
|
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 |
|