| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
13780
|
Mon Apr 23 20:06:35 2018 |
rana | Update | PEM | PID tune | This shows a step response of the EX seis
temp control with K_I = -1 and K_P = -0.1.
The time constants for both heatup |
|
|
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. |
|
|
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 |
|
|
13785
|
Tue Apr 24 15:59:23 2018 |
Steve | Update | Wiki | AP table layout 20180328 |
Quote:
|
|
|
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. |
|
|
13788
|
Wed Apr 25 17:44:39 2018 |
Arnold | Update | PEM | PEM Anti-Alias wiring |
|
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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. |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
13812
|
Thu May 3 12:19:13 2018 |
gautam | Update | CDS | slow machine bootfest | Reboot for c1susaux
and |
|
|
13815
|
Fri May 4 18:59:39 2018 |
gautam | Update | SUS | Stack measurement ongoing | [SV,KA,RXA,GV]
The |
|
|
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 |
|
|
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. |
|
|
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 |
|
|
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 |
|
|
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, |
|
|
13823
|
Mon May 7 20:01:14 2018 |
Rorpheus | Update | General | Use anti-dewhitening + show CARMA/DARMA | |
|
|
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. |
|
|
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. |
|
|
13828
|
Wed May 9 19:51:07 2018 |
gautam | Update | General | Input beam misaligned | As
suspected - the problem was with the TTs. |
|
|
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. |
|
|
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 |
|
|
13831
|
Thu May 10 14:13:22 2018 |
gautam | Update | General | More refinement of DARM control signal projection | Summary:
It
seems that after a x10 increase in the coil |
|
|
13833
|
Fri May 11 13:58:42 2018 |
rana | Update | General | More refinement of DARM control signal projection | I think "OLG" trace is not labeled
right; it would be good to see the actual
OLG in addition to whatever that trace actually |
|
|
13834
|
Fri May 11 18:17:07 2018 |
gautam | Update | DetChar | AUX laser PLL setup | [koji,
gautam]
As discussed at the meeting earlier |
|
|
13835
|
Fri May 11 19:02:52 2018 |
gautam | Update | General | More refinement of DARM control signal projection | I was a bit hasty in posting the earlier
plots. In the earlier plot, the "OLG"
trace was OLG * anti dewhitening as Rana |
|
|
13836
|
Sat May 12 10:02:03 2018 |
rana | Update | General | More refinement of DARM control signal projection | Good question! I've never calculated
what the resonance frequency would be if
had an inductive resistor with our cable |
|
|
13837
|
Sun May 13 15:15:18 2018 |
gautam | Update | General | CDS crash | I found the c1lsc
machine to be completely unresponsive today. |
|
|
13838
|
Sun May 13 17:31:51 2018 |
gautam | Update | General | CDS crash | As suspected, this was indeed a path problem.
Johannes will elog about it later, but in
short, it is related to some path variables |
|
|
13839
|
Sun May 13 20:48:38 2018 |
johannes | Update | General | CDS crash | I think the root of the problem is that
the /opt/rtapps/ |
|
|
13841
|
Mon May 14 18:58:32 2018 |
Kevin | Update | PonderSqueeze | Squeezing with no SRM |
Quote:
|
|
|
13842
|
Tue May 15 10:42:14 2018 |
Koji | Update | PSL | Modulation depth measurement for the 3IFO aLIGO EOM and aftermath | The marconi RF output was turned on and
thus the RF generator condition was restored
to the nominal state on Friday 11th. |
|
|
13843
|
Tue May 15 13:34:30 2018 |
Steve | Update | safety | surf safety training | Pooja and Keirthana received 40m specific
basic safety training. |
|
|
13846
|
Tue May 15 21:56:57 2018 |
gautam | Update | General | Stack measurement setup decommissioned | [steve,koji,gautam]
Since we think we already know |
|
|
13847
|
Tue May 15 22:11:38 2018 |
gautam | Update | General | IFO maintenance | Since there have been various software/hardware
activity going on (stack weighing, AUX laser
PLL, computing timing errors etc etc), I |
|
|
13849
|
Wed May 16 21:02:22 2018 |
Kevin | Update | PEM | ADC common mode rejection with new seismometer connections | As described in this
elog, the ADC for the seismometers now
has the signals wired directly to the ADC |
|
|
13850
|
Wed May 16 21:47:17 2018 |
Kevin | Update | PEM | Seismometer Noise Spectra | Earlier today Kira and I reconnected the
EX seismometer. I just took some spectra
of all three seismometers, shown in the attachments, |
|
|
13851
|
Thu May 17 09:14:38 2018 |
Steve | Update | General | Stack measurement setup decommissioned | The final set-up of stack measurment with
3 load
cells and 4 leveling |
|
|
13852
|
Thu May 17 11:56:37 2018 |
gautam | Update | General | EPICS process died on c1ioo | The EPICS process on the c1ioo front
end had died mysteriously. As a result, MC |
|
|
13859
|
Thu May 17 15:38:19 2018 |
Kira | Update | PEM | test setup with seismometer | I've moved my setup to the actual seismometer.
I attached the temperature sensor to the
seismometer (attachment 1) with duct tape, |
|