ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
13747
|
Wed Apr 11 10:47:26 2018 |
Steve | Update | SUS | satellite amps labeled | Satellite amplifiers labeled with date.
Old labels left on. |
|
|
13748
|
Thu Apr 12 10:15:33 2018 |
Kira | Update | PEM | MEDM setup | Another update. I've changed the on/off
button so that it's visible which state
it's in. I did that by changing the type |
|
|
13749
|
Thu Apr 12 18:12:49 2018 |
gautam | Update | ALS | NPRO channels hijacked | Summary:
Today,
the measured IR ALS noise for the X arm was
dramatically improved. The main change was |
|
|
13750
|
Fri Apr 13 00:20:46 2018 |
rana | Update | PEM | MEDM setup | changed the setpoint of the EX Seismomter
T ctrl servo from 35 to 39 C to see if this
helps the stability by decreasing the cooldown |
|
|
13751
|
Fri Apr 13 11:02:41 2018 |
gautam | Update | ALS | EX fiber polarization drift | Attachment #1 |
|
|
13752
|
Fri Apr 13 16:59:12 2018 |
gautam | Update | ALS | EX green mode-matching | THIS CALCULATION |
|
|
13753
|
Fri Apr 13 17:56:26 2018 |
gautam | Update | ALS | Fibers switched out | I swapped the EX fiber for the PSL fiber
in the polarization monitoring setup. There
is a lot more power in this fiber, and one |
|
|
13754
|
Sat Apr 14 14:42:09 2018 |
gautam | Update | ALS | Fibers switched out | It looks like the drift in polarization
content in the PSL pickoff is actually much
higher than that in the EX pickoff. Note |
|
|
13755
|
Mon Apr 16 22:09:53 2018 |
Kevin | Update | General | power outage - BLRM recovery | I've been looking into recovering the
seismic BLRMs for the BS Trillium seismometer.
It looks like the problem is probably |
|
|
13756
|
Tue Apr 17 09:57:09 2018 |
Steve | Update | General | seismometer interfaces |
|
|
|
13757
|
Tue Apr 17 14:08:29 2018 |
gautam | Update | ALS | Fibers switched out | A follow-up on the discussion from today's
lunch meeting - Rana pointed out that rotation
of the fiber in the mount by ~5degrees cannot |
|
|
13758
|
Wed Apr 18 10:44:45 2018 |
gautam | Update | CDS | slow machine bootfest | All slow machines (except c1auxex)
were dead today, so I had to key them all. |
|
|
13759
|
Wed Apr 18 12:18:39 2018 |
Kira | Update | PEM | final setup sketch | I've updated the sketches and added
in front panels for the seismometer block
and the 1U panel (attachments 3 and 4). There |
7x |
|
13760
|
Wed Apr 18 16:59:35 2018 |
rana | Update | PEM | final setup sketch: EX Seis | Can you please add dimensions to the drawing,
so we can see if things fit and what the
cable lenghts need to be? |
|
|
13761
|
Wed Apr 18 17:15:35 2018 |
rana | Configuration | Computers | NODUS: no xmgrace for dataviewer | Turns
out, there is no RPM for XmGrace on Scientific
Linux 7. Since this is the graphic output |
|
|
13762
|
Wed Apr 18 19:02:15 2018 |
gautam | Update | IOO | MC spot centering scripts | I'm working on fixing these (and the
associated MEDM scripts) up so that we can
get some reliable readback on how well centered |
|
|
13763
|
Wed Apr 18 20:33:19 2018 |
Kevin | Update | General | seismometer interfaces | Steve, the pictures you posted are not
the AA board I was referring to. The attached
pictures show the board which is sitting |
|
|
13764
|
Wed Apr 18 22:46:23 2018 |
johannes | Configuration | General | AS port laser injection | Using Gautam's Finesse file and the
cad files for the 40m optical setup I propagated
the arm mode out of the AS port. For the |
|
|
13765
|
Thu Apr 19 00:03:51 2018 |
gautam | Update | IOO | More IMC NBing | Summary:
As shown in the Attachments, |
|
|
13766
|
Thu Apr 19 01:04:00 2018 |
gautam | Configuration | General | AS port laser injection | For the arm cavity ringdowns, I guess we
don't need AS55/AS110 (although I think
the camera will still be useful for alignment). |
|
|
13767
|
Thu Apr 19 09:57:03 2018 |
gautam | Update | Wiki | AP and ETMX tables uploaded to wiki | The most up to date pictures of the AP
table and ETMX table that Steve took have
been uploaded to the relevant |
|
|
13768
|
Thu Apr 19 11:29:11 2018 |
rana | Update | PEM | PID tune | Yesterday, I changed the P gain of the
PID loop from zero to +0.1. Seems good
so far; will monitor for a couple days to |
|
|
13769
|
Thu Apr 19 12:23:30 2018 |
Kira | Update | PEM | final setup sketch update | I've added in the dimensions to my
sketch.
It seems like placing the two connectors |
|
|
13770
|
Thu Apr 19 17:15:35 2018 |
gautam | Update | IOO | More IMC NBing | Summary:
Today, I repeated the coil driver
noise measurement. Now, the coil driver noise |
|
|
13771
|
Thu Apr 19 18:23:51 2018 |
Kira | Update | PEM | final setup sketch update | since we're just going from the short
rack (not the tall rack) to the seismometer,
can't we use a cable shorter than 45' |
|
|
13772
|
Thu Apr 19 20:41:09 2018 |
Koji | Configuration | General | Aux Laser LD dying? (AS port laser injection) | I suspect
that the LD of the aux laser is dying.
- The max power we obtain from this |
|
|
13773
|
Fri Apr 20 00:26:34 2018 |
gautam | Update | ALS | Fibers switched out | Summary:
|
|
|
13774
|
Fri Apr 20 15:07:45 2018 |
Kira | Update | PEM | final setup sketch update | If we lay the cable along the floor then
it should be around 6' to the current
setup and about 20' to the actual |
|
|
13775
|
Fri Apr 20 16:22:32 2018 |
gautam | Update | General | Nodus hard-rebooted | Aidan called saying nodus was down at ~345pm.
I was able to access it at ~330pm. I couldn't
ssh in from my machine or the control room |
|
|
13776
|
Fri Apr 20 16:25:08 2018 |
Steve | Update | Wiki | ETMX table layout uploaded to wiki | ETMX
table layout uploaded with beam paths
to the wiki. |
|
|
13777
|
Fri Apr 20 23:36:28 2018 |
Kevin | Update | PEM | Seismometer BLRMs | Steve secured the GPS time server in the
rack above the AA board and removed the wooden
block that it was resting on. The new rack |
|
|
13778
|
Sat Apr 21 20:19:05 2018 |
gautam | Update | General | Megatron hard-rebooted | I found megatron in a similar state to
that which nodus was in yesterday. Clued
by the fact that MCautolocker wasn't |
|
|
13779
|
Sat Apr 21 20:25:12 2018 |
gautam | Update | ALS | PSL fiber pickoff status | Seems like there is still a bit of variation
in the power in the two polarizations, though
it is much smaller now, at the ~5% level |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
13785
|
Tue Apr 24 15:59:23 2018 |
Steve | Update | Wiki | AP table layout 20180328 |
Quote:
|
|
|
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 |
|
|
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 |
|
|
|
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. |
|
|
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 |
|
|
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 |
|
|
13792
|
Thu Apr 26 18:58:21 2018 |
Bruce | Configuration | ALS | New look EX Fiber coupling - pol stability | |
|
|
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 |
|
|
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. |
|