| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
13830
|
Thu May 10 11:38:19 2018 |
gautam | Update | General | ITMY UL | Looking at Steve's plot, I was reminded
of the ITMY UL OSEM issue. The numbers don't
make sense to me though - 300um of DC shift |
|
|
13829
|
Thu May 10 08:45:16 2018 |
Steve | Update | General | 4.5M eq. Cabazon, CA | 20180508 4:49am Cabazon earth quake 4.5M
at 79 miles away. ETMX is in load cell
measurment condition. |
|
|
13828
|
Wed May 9 19:51:07 2018 |
gautam | Update | General | Input beam misaligned | As
suspected - the problem was with the TTs. |
|
|
13827
|
Wed May 9 17:30:04 2018 |
gautam | Update | General | Input beam misaligned | There is
no beam going into the IFO at the moment. |
|
|
13826
|
Tue May 8 11:41:16 2018 |
gautam | Update | General | IFO maintenance | There was an earthquake, all watchdogs
were tripped, ITMX was stuck, and c1psl was
dead so MCautolocker was stuck. |
|
|
13825
|
Tue May 8 10:24:10 2018 |
Kira | Summary | PEM | plan for this week | Here are a few things I will be working
on:
Design PCB boards for the |
|
|
13824
|
Tue May 8 00:40:51 2018 |
gautam | Configuration | ALS | BeathMouth pulled out of PSL table | Summary:
I did some more BeatMouth characterization.
My primary objective was to do a power budget. |
|
|
13823
|
Mon May 7 20:01:14 2018 |
Rorpheus | Update | General | Use anti-dewhitening + show CARMA/DARMA | |
|
|
13822
|
Mon May 7 16:23:06 2018 |
gautam | Update | General | DARM actuation estimate | Summary:
Using the Wiener Filter estimate
of the DARM disturbance we will have to cancel, |
|
|
13821
|
Mon May 7 15:27:28 2018 |
gautam | Update | SUS | Stack measurement expectation | [steve,gautam]
We tried to estimate what the load
cell measurement should yield. Here is the |
|
|
13820
|
Mon May 7 11:46:07 2018 |
gautam | Update | PEM | FW parameter update | As part of investigation into this issue,
Jonathan Hanks pointed out that the "minute
trends" being recorded by our system |
|
|
13819
|
Sat May 5 22:32:07 2018 |
Koji | Update | PSL | Modulation depth measurement for the 3IFO aLIGO EOM | The 3IFO EOM was formerly tuned as the
H2 EOM, so the resonant frequencies are different
from the nominal aLIGO ones. |
|
|
13818
|
Sat May 5 20:30:21 2018 |
Koji | Update | PSL | Modulation depth measurement for the 3IFO aLIGO EOM and aftermath | Caution:
Because of this work and my negligence, the
RF output of the main Marconi for the IFO |
|
|
13817
|
Fri May 4 21:17:57 2018 |
gautam | Configuration | ALS | BeathMouth pulled out of PSL table | I have been puzzled about the beat note
level we get out of the BeatMouth for some
time. |
|
|
13816
|
Fri May 4 19:06:28 2018 |
rana | Configuration | Electronics | AUX-PSL PLL Implementation & Characterization | this doesn't make much sense to me;
the phase to frequency conversion (mixer-demod
to PZT ) should give us a 1/f loop as Johannes |
|
|
13815
|
Fri May 4 18:59:39 2018 |
gautam | Update | SUS | Stack measurement ongoing | [SV,KA,RXA,GV]
The |
|
|
13814
|
Fri May 4 13:24:56 2018 |
Jon Richardson | Configuration | Electronics | AUX-PSL PLL Implementation & Characterization | Attached are final details of the phase-locked
loop (PLL) implementation we'll
use for slaving the AUX 700 mW NPRO laser |
|
|
13813
|
Thu May 3 20:29:39 2018 |
gautam | Configuration | Electronics | PSL-Aux. Laser Phase-Locked Loop | Some notes about the setup and work at
the PSL table today, Jon can add to / correct
me. |
|
|
13812
|
Thu May 3 12:19:13 2018 |
gautam | Update | CDS | slow machine bootfest | Reboot for c1susaux
and |
|
|
13811
|
Thu May 3 12:10:12 2018 |
gautam | Configuration | General | AS port laser injection | I think we need AS55 for locking the configuration
Jon suggested - AS55 I and Q were used to
lock the SRMI previously, and so I'd |
|
|
13810
|
Thu May 3 10:40:43 2018 |
johannes | Configuration | General | AS port laser injection | Instead of trying to couple the fiber output
into the interferometer, I'm doing the
reverse and maximize the amount of interferometer |
|
|
13809
|
Thu May 3 09:56:42 2018 |
Steve | HowTo | SEI | preparation of load cell measurement at ETMX | [ Dennis Coyne' precision answer
]
|
|
|
13808
|
Thu May 3 00:42:38 2018 |
Kevin | Update | PonderSqueeze | Coil driver contribution to squeezing noise budget | In light of the discussion at today's
meeting, Guantanamo and I looked at how the
series resistance for the test mass coil |
|
|
13807
|
Wed May 2 21:39:33 2018 |
gautam | Configuration | ALS | IR ALS for EY | The new K6XS mounts I ordered have arrived.
I want to install one of them at the Y-end.
I can't find a picture of the current |
|
|
13806
|
Wed May 2 10:03:58 2018 |
Steve | HowTo | SEI | preparation of load cell measurement at ETMX | Gautam and Steve,
We have calibrated the load
cells. The support beams height monitoring |
6x |
|
13805
|
Tue May 1 19:37:50 2018 |
gautam | Update | General | DARM actuation estimate | Here is an updated plot - the main difference
is that I have added a trace that is the
frequency domain wiener filter subtraction |
|
|
13804
|
Tue May 1 15:23:18 2018 |
Kira | Update | PEM | new ADC channel setup issue | [Kira, Johannes]
I connected up the channels for
the ADC Acromag a while back and we were |
|
|
13803
|
Tue May 1 11:15:19 2018 |
Kira | Update | PEM | PID Quixote | I added an out of loop sensor to the can
by placing the lab temperature sensor inside
the can. I'm not sure which channel is |
|
|
13802
|
Tue May 1 08:04:13 2018 |
Jon Richardson | Configuration | Electronics | PSL-Aux. Laser Phase-Locked Loop | [Jon, Gautam, Johannes]
Summary: In
support of making a proof-of-concept RF measurement |
|
|
13801
|
Mon Apr 30 23:13:12 2018 |
Kevin | Update | Computer Scripts / Programs | DataViewer leapseconds | I was trying to plot trends (min, 10 min,
and hour) in DataViewer and got the following
error message |
|
|
13800
|
Mon Apr 30 15:36:18 2018 |
Kira | Update | PEM | final setup sketch | I've attached a sketch of how the panel
will be mounted. We should make a small rectangular
box that would raise the panel from the block |
|
|
13799
|
Sun Apr 29 22:53:06 2018 |
gautam | Update | General | DARM actuation estimate | Motivation:
We'd like to know how much
actuation is required on the ETMs to lock |
|
|
13798
|
Fri Apr 27 18:42:02 2018 |
rana | Update | PEM | new Seis temp chans | for whatever reason, I am unable to get
minute or second trends from nodus for any
channels (IMC, PEM, etc) since the reboot. |
|
|
13797
|
Fri Apr 27 16:55:31 2018 |
gautam | Update | General | EY area access blocked | Steve was calibrating the load cells at
the EY table with the crane - we didn't
get through the full procedure today, so |
|
|
13796
|
Fri Apr 27 01:36:02 2018 |
gautam | Configuration | ALS | IR ALS noise performance | Summary:
My goal was to do some further
characterization of the IR ALS system tonight. |
|
|
13795
|
Thu Apr 26 23:00:42 2018 |
rana | Update | PEM | new Seis temp chans | After fixing the spelling of the EX temperature
readback, I also added all of the MEDM sliders
to the C0EDCU.ini file (making sure to add |
|
|
13794
|
Thu Apr 26 20:22:21 2018 |
Kevin | Update | PEM | ADC common mode rejection with new seismometer connections | Yesterday I wired the outputs from the
seismometers directly to the ADC input bypassing
the old AA board circuit as is described |
|
|
13793
|
Thu Apr 26 19:46:26 2018 |
rana | Update | PEM | PID Quixote | Increased
the Integral gain (from -1 to -4) on the
EX temperature controller. This didn't |
|
|
13792
|
Thu Apr 26 18:58:21 2018 |
Bruce | Configuration | ALS | New look EX Fiber coupling - pol stability | |
|
|
13791
|
Thu Apr 26 11:24:50 2018 |
gautam | Configuration | ALS | New look EX Fiber coupling - pol stability | Here is a first look at the overnight stability.
For the temperature, I used the calibration
I found in the old psl database file, seems |
|
|
13790
|
Thu Apr 26 09:35:49 2018 |
Kevin | Update | PEM | PEM Anti-Alias wiring | I wired all 32 channels going to the AA
board directly to the ADC as described in
the previous |
|
|
13789
|
Wed Apr 25 19:09:37 2018 |
gautam | Configuration | ALS | New look EX Fiber coupling | Summary:
I implemented most of the things
outlined in my previous elog. |
|
|
13788
|
Wed Apr 25 17:44:39 2018 |
Arnold | Update | PEM | PEM Anti-Alias wiring |
|
|
|
13787
|
Tue Apr 24 21:19:08 2018 |
Kevin | Update | PEM | Seismometer BLRMs | In the ongoing attempt to recover the seismometer
BLRMS, I removed the AA board from the rack
and modified the BS seismometer Z channel. |
|
|
13786
|
Tue Apr 24 18:54:15 2018 |
gautam | Configuration | ALS | Proposed changes to EX fiber coupling | I started working on the EX table. Work
is ongoing so I will finish this up later
in the evening, but in case anyone is wondering |
|
|
13785
|
Tue Apr 24 15:59:23 2018 |
Steve | Update | Wiki | AP table layout 20180328 |
Quote:
|
|
|
13784
|
Tue Apr 24 11:31:59 2018 |
gautam | Configuration | ALS | Proposed changes to EX fiber coupling | Motivation:
I want to make another measurement of the |
|
|
13783
|
Tue Apr 24 10:10:43 2018 |
gautam | Update | Computer Scripts / Programs | Particle swarm hyper parameter optimization | I'm copying and pasting Nikhil's
email here as he was unable to login to the
elog (but should now be able to in order |
|
|
13782
|
Tue Apr 24 09:10:20 2018 |
Kira | Update | PEM | final setup sketch | I've attached the final sketch for
the panel on the granite block. |
|
|
13781
|
Tue Apr 24 08:36:47 2018 |
johannes | Configuration | General | Aux Laser LD dying? (AS port laser injection) | In September
2017 I measured ~150mW output power,
which was already kind of low. What are the |
|