| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
13505
|
Fri Jan 5 19:19:25 2018 |
rana | Configuration | SEI | Barry Controls 'air puck' instead of 'VOPO style' breadboard | We've been thinking about putting in
a blade spring / wire based aluminum breadboard
on top of the ETM & ITM stacks to get |
|
|
13506
|
Fri Jan 5 21:54:28 2018 |
rana | Update | General | power outage - timing error | Rolf came here in the morning, but not
sure what he did or if Jamie remotely did
something. But the screen is green. |
|
|
13509
|
Sat Jan 6 13:47:32 2018 |
rana | Update | PonderSqueeze | Displacement requirements for short-term squeezing |
ought to tune for 210 Hz (in-between
powerlines) since 100 Hz is tough to work
due to scattering, etc.
rename |
|
|
13516
|
Mon Jan 8 20:50:01 2018 |
rana | Summary | Electronics | SR560: reworking | I replaced the NPD5565 with a LSK389 (SOIC-8
with DIP adapter). There was a noise reduction
of ~30%, but not nearly as much as I expected. |
|
|
13528
|
Wed Jan 10 22:19:44 2018 |
rana | Update | SUS | ETMX DC alignment | Best to just calibrate the ETM OL in the
usual way. I bet the OSEM outputs have a
cal uncertainty of ~50% since the input matrix |
|
|
13545
|
Sat Jan 13 02:36:51 2018 |
rana | Configuration | Computers | sendmail troubles on nodus | I think sendmail is required on nodus since
that's how the dokuwiki works. That's
why the dokuwiki was trying to send an email |
|
|
13564
|
Sat Jan 20 15:57:11 2018 |
rana | Update | Electronics | Whitening filter D990694 | this
is the note from Hartmut Grote on this
topic from 2004 |
|
|
13619
|
Wed Feb 7 19:14:19 2018 |
rana | Update | PEM | PID test plan |
The heater circuit should get its
own dedicated supply.
We do not
want to ever use the old Ref Cav heater for |
|
|
13657
|
Mon Feb 26 20:55:56 2018 |
rana | Update | ALS | Daughter board prototyping | Looks good.
* for bypass type applications,
you don't have to use Wima caps (which |
|
|
13700
|
Fri Mar 23 12:00:20 2018 |
rana | Update | PEM | test setup | we don't ever want to use our 16 kHz
real time system for such low frequency action;
its main purpose is for real-time controls, |
|
|
13705
|
Mon Mar 26 21:25:55 2018 |
rana | Summary | IOO | MC2 Trans table has issues | Gautam, Rana
While at the MC2 table, we noticed
that it has some optical problems: |
|
|
13721
|
Fri Mar 30 06:14:31 2018 |
rana | Update | IOO | MCREFL_PD Optical response measurement | the noise eater on/off measurements should
be done for 0-100 kHz and from the demod
board output monitor |
|
|
13722
|
Fri Mar 30 06:16:45 2018 |
rana | Update | PEM | PID test | Can't really figure out what this plot
means. We need to see the sensor (in units
of deg C) and the control signal (in heating |
|
|
13736
|
Fri Apr 6 18:28:57 2018 |
rana | Update | PEM | PID tuning | Made some changes:
Set P and D gains to zero.
We only need slow drift control.
Changed |
|
|
13743
|
Mon Apr 9 23:49:50 2018 |
rana | Update | PSL | PSL chans | I think we can scrap the 126MOPA channels
since they're associated with the Lightwave
NPRO and MOPA. We should add the channels |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
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. |
|
|
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 |
|
|
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 |
|
|
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 |
|
|
13869
|
Sun May 20 17:43:01 2018 |
rana | Update | Electronics | How to choose resistors | Article
from EE Times, describing why metal foil
(NOT metal film) resistors are really better |
|
|
13897
|
Wed May 30 12:13:13 2018 |
rana | Update | Computers | NODUS: rsyncd + frames | To get our rsync back to LDAS back up,
I followed instructions from Dan Kozak:
|
|
|
13917
|
Tue Jun 5 20:31:42 2018 |
rana | Update | Cameras | Update on GigE Cameras | Aha! Video is back!
I think it would be good to add
a flag whereby the video can be saved to |
|
|
13960
|
Thu Jun 14 00:46:09 2018 |
rana | Update | IOO | WFS HEAD SW confusion | its painful, but you and I should probably
take these out, bypass the switches
and use them with fixed gain; |
|
|
14023
|
Tue Jun 26 22:06:33 2018 |
rana | Update | Computers | rossa: SL7.3 upgrade continues: DTT is back | I used the following commands to
get diaggui to run on rossa/SL7:
controls@rossa|lib64> |
|
|
14025
|
Wed Jun 27 19:05:20 2018 |
rana | Update | Computers | rossa: SL7.3 upgrade continues: DTT is back | UNELOGGED: someone has changed
Pianosa from Ubuntu/Dumbian into SL7. Might
be hackers. |
|
|
14029
|
Thu Jun 28 10:28:27 2018 |
rana | Update | CDS | vacuum pneumatic N2 pressure | we disabled logging the N2 Pressure to
a text file, since it was filling up disk
space. Now it just sends an email to our |
|
|
14076
|
Tue Jul 17 12:46:28 2018 |
rana | Update | General | some notes from yesterday | For the EY, instead of balancing the table,
I just moved the weight approximately so
that the ETMY OSEMS were at half light, but |
|
|
14100
|
Tue Jul 24 06:11:50 2018 |
rana | Update | Cameras | Developing neural networks on simulated video | This looks like good progress. Instead
of fixed sines or random noise, you should
generate now a time series for the motion |
|
|
14113
|
Sun Jul 29 20:03:02 2018 |
rana | Update | PEM | Seismometer temp control | While Shruti is re-building Kira's
heater circuit, I looked up how to do one
of these (i.e. what does a real EE say about |
|
|
14127
|
Thu Aug 2 23:09:25 2018 |
rana | Summary | Computers | X Green "Mystery" solved | I'm going to guess that this was me:
I was disconnecting some octopus power strip
nonsense down there (in particular illuminators |
|
|
14130
|
Fri Aug 3 16:27:40 2018 |
rana | Update | SUS | Low noise bias path idea | Bah! Too complex. |
|
|
14177
|
Wed Aug 22 12:22:27 2018 |
rana | Summary | Electronics | Inspection of the possible dual backplane interfaces for Acromag DAQ | I think we don't need to keep Crystal
Ref: we can change this into a regular Wenzel
box with no outside control or monitoring. |
|
|
14267
|
Fri Nov 2 12:07:16 2018 |
rana | Update | CDS | NDScope | https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=44971
Let's install Jamie's new
Data Viewer |
|
|
14290
|
Mon Nov 12 13:53:20 2018 |
rana | Update | IOO | loss measurement: oscope vs CDS DAQ | sstop using the ssscope, and just put the
ssssignal into the DAQ with sssssome whitening.
You'll get 16 bitsśšß. |
|
|
14311
|
Tue Nov 20 17:38:13 2018 |
rana | Update | Upgrade | New Coffee Machine | Rana, Aaron, Gautam
The |
|
|
14329
|
Sun Dec 2 19:32:35 2018 |
rana | Update | IOO | fit times | need to vary start/stop times in fit to
test for systematics |
|
|
14336
|
Fri Dec 7 19:42:47 2018 |
rana | Frogs | elog | can't upgrade DokuWiki because of PHP / SL7 | All of our wikis (except the 40m one which
unfortunately got turned into ligo.org mess)
use DokuWiki. This now has an auto-upgrade |
|
|
14382
|
Thu Jan 3 21:17:49 2019 |
rana | Configuration | Computers | Workstation Upgrade: Donatella -> Scientific Linux 7.2 | donatella was one of our last workstations
running ubuntu12. we installed SL7 on there
today |
|
|
14458
|
Fri Feb 15 18:41:18 2019 |
rana | Update | VAC | Vac system is back up | If the acromags lock up whenever there
is an electrical spike, shouldn't we
have them on UPS to smooth out these ripples? |
|
|
14460
|
Fri Feb 15 19:50:09 2019 |
rana | Update | VAC | Vac system is back up | The acromags are on the UPS. I suspect
the transient came in on one of the signal
lines. Chub tells me he unplugged one of |
|
|
14464
|
Mon Feb 18 19:16:55 2019 |
rana | Summary | Computers | new laptop setup: ASIA | The old IBM laptop (Asia) has died from
a fan error after 7 years. WE have a new
Lenovo 330 IdeaPad to replace it: |
|
|
14465
|
Tue Feb 19 19:03:18 2019 |
rana | Update | Computers | Martian router -> WPA2 | I have swapped our martian router's
WiFi security over to WPA2 (AES) from the
previous, less-secure, system. Creds are |
|
|
14494
|
Thu Mar 21 21:50:31 2019 |
rana | Update | VAC | Protection against AC power loss | agreed - we need all pumps on UPS for their
safety and also so that we can spin them
down safely. Can you and Chub please find |
|