| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
16009
|
Fri Apr 9 13:13:00 2021 |
Anchal, Paco | Update | SUS | Faster coil balancing | We ran again this method but with the 'b'
parameter as a matrix instead. This provides
more gain on some off-diagonal terms than |
|
|
16010
|
Fri Apr 9 17:41:12 2021 |
rana | Update | SUS | Faster coil balancing | convergence is great.
Next we wanna get the F2A filters
made since most of the IMC control happens |
|
|
16014
|
Sat Apr 10 10:07:47 2021 |
rana | Update | SUS | Faster coil balancing | I think I mis-spoke about the balancing
channels before. The ~20 Hz balancing
could go into either the COIL banks or the |
|
|
10016
|
Mon Jun 9 22:40:36 2014 |
Jenne | Update | CDS | Fast front end computers up | Rana
and I now seem to have the fast front end
computers (c1lsc, c1sus, c1ioo, c1iscex and |
|
|
17018
|
Tue Jul 19 16:00:34 2022 |
yuta | Configuration | BHD | Fast channels for BHD DCPDs now available in c1lsc but not in c1hpc | [Paco, Anchal-remote-support, Yuta]
We added fast channels to BHD DC
PDs. |
|
|
14901
|
Thu Sep 19 21:23:51 2019 |
gautam | Update | CDS | Fast BIO splicing re-implemented at 1Y2 | [KA,
GV] |
|
|
14895
|
Wed Sep 18 12:40:09 2019 |
gautam | Update | CDS | Fast BIO Mapping at 1Y2 | INCORRECT
INFO IN THIS ELOG HAS BEEN REMOVED. SEE THIS |
|
|
11648
|
Tue Sep 29 16:52:49 2015 |
ericq | Update | LSC | Fast ALS troubles - unknown zero | Fast ALS control continues to elude me.
I fixed my LPF to take the input
impedance of the CM board input into account; |
|
|
11620
|
Fri Sep 18 13:33:17 2015 |
ericq | Update | LSC | Fast ALS troubles - Noise at 36kHz | To get around the problems between the
pomona LPF and low CM board input impedance,
I've placed the LPF at the CM board fast |
|
|
11621
|
Fri Sep 18 16:08:41 2015 |
ericq | Update | LSC | Fast ALS troubles - Noise at 36kHz | I looked at REFL11 and REFL55 during
PRMI lock - the line is there.
|
|
|
11622
|
Fri Sep 18 19:15:35 2015 |
rana | Update | LSC | Fast ALS troubles - Noise at 36kHz | One the Wiki (https://wiki-40m.ligo.caltech.edu/40mHomePage),
we have a Mech Resonance page for mechanical
frequencies and a PEM page where we want |
|
|
11658
|
Fri Oct 2 03:29:16 2015 |
ericq | Update | LSC | Fast ALS progress - AO path crossed over, but no high BW | I've been using an SR560 to experiment
with differnent pole frequencies, to try
and cancel the mystery zero. It's after |
|
|
11686
|
Tue Oct 13 16:28:21 2015 |
ericq | Update | LSC | Fast ALS pomona | I've made a cascaded passive 2-pole
pomona box for fast ALS use, using LISO to
check that it'll give the right shape |
|
|
15212
|
Fri Feb 14 00:53:50 2020 |
gautam | Update | ALS | Fast ALS - more setup | In the process of setting up some cabling
at 1Y2, I must've bumped a cable to the
c1lsc expansion chassis. Anyways, the c1lsc |
|
|
15209
|
Thu Feb 13 01:47:39 2020 |
gautam | Update | ALS | Fast ALS - delay line prep | A few years ago, Koji and I setup a delay
line phase shifter, which can be used to
impart a (switchable) delay to a signal path. |
|
|
3674
|
Thu Oct 7 17:53:07 2010 |
yuta | Update | Computers | Farfalla with Firefox, fixed | (Kiwamu, Yuta)
Symptom: |
|
|
9302
|
Mon Oct 28 12:53:23 2013 |
Jenne | Update | CDS | Farfalla and Asia added to Host Table in Wiki |
|
|
|
2918
|
Wed May 12 03:56:54 2010 |
Koji | Update | IOO | Faraday aligned | Zach and Koji
The old small MMT was removed and
wrapped by Al foils. |
|
|
17440
|
Wed Feb 1 14:43:21 2023 |
JC | Update | VAC | False Nitrogen Leakage | Chub mentioned to Paco and I that the Nitrogen
seemed to be losing pressure quicker than
usual. After looking over the previous 4 |
|
|
5601
|
Mon Oct 3 14:05:41 2011 |
Jenne | Update | SUS | Failing to set SUS summary screen values | I assume it's because the burt restore
didn't work for the SUS summary screen, but
all of the values for the ifo suspensions |
|
|
5604
|
Mon Oct 3 17:27:23 2011 |
Jenne | Update | SUS | Failing to set SUS summary screen values |
|
|
|
5674
|
Sun Oct 16 05:35:18 2011 |
rana | Update | Computer Scripts / Programs | Failing to set SUS summary screen values |
|
|
|
17172
|
Tue Oct 4 21:00:49 2022 |
Chris | Update | Computers | Failed takeover attempt with the new front ends | [Jamie, JC, Chris]
Today we made a failed attempt
to take over the 40m hardware with the new |
|
|
6772
|
Wed Jun 6 22:04:19 2012 |
Jamie | Update | Computers | Failed attempt to get pianosa to support dual monitors | I've spent an inordinate amount of time
trying to figure out how to get pianosa to
support dual monitors. It apparently |
|
|
6773
|
Wed Jun 6 22:23:53 2012 |
Jamie | Update | Computers | Failed attempt to get pianosa to support dual monitors | I managed to get pianosa working again
with just a single monitor. I'm done
trying to configure it for dual, though. |
|
|
8012
|
Wed Feb 6 15:20:55 2013 |
yuta | Summary | General | FWHM was wrong | I have to blame Jamie for putting extra
2 randomly.
Measured PRM-PR2 cavity |
|
|
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 |
|
|
12992
|
Mon May 15 19:21:04 2017 |
Koji | Update | Computer Scripts / Programs | FSSslow / MCautolocker restarted | It seems that FSS slow servo stopped working.
I found that megatron was restarted
( |
|
|
633
|
Thu Jul 3 16:57:23 2008 |
John | Summary | General | FSS_RMTEMP | The FSS room temp alarm has been beeping a
lot recently. I altered the FSS_RMTEMP alarm
levels using the
|
|
|
10315
|
Fri Aug 1 00:51:07 2014 |
Koji | Update | PSL | FSSSlowServo update | FSS Slow set point to be zero
op340m:FSS>cat FSSSlowServo
#!/usr/bin/perl -w |
|
|
17047
|
Fri Jul 29 20:21:11 2022 |
Koji | Update | PSL | FSSSlow/MCAutolocker issue (docker) | MCAutolocker/FSSSlow are not properly documented
and not properly working.
Tidy up the script and documentation, |
|
|
17049
|
Sat Jul 30 10:38:12 2022 |
Anchal | Update | PSL | FSSSlow/MCAutolocker issue (docker) | The FSSSlow script was not properly documented
and it was not working, so I had to use one
that I knew worked from CTN. This scripts |
|
|
17050
|
Sat Jul 30 12:48:18 2022 |
Koji | Update | PSL | FSSSlow/MCAutolocker issue (docker) | > it only starts working when C1:IOO-MC_LOCK
is 1 and C1:PSL-FSS_SLOWLOOP is 1.
- OK. Your new MCAutolocker does |
|
|
17057
|
Thu Aug 4 11:28:22 2022 |
Anchal | Update | PSL | FSSSlow/MCAutolocker issue (docker) | Added C1:IOO-MC_LOCK
to ALConfigMC.yml which solved the isse
with FSS Slow. We should tune the FSS Slow |
|
|
17065
|
Mon Aug 8 14:47:10 2022 |
rana | Update | PSL | FSSSlow/MCAutolocker issue (docker) | can't we just go back to the old python
script that was working for many years, and
tested? I imagine that as soon as someone |
|
|
17834
|
Fri Sep 8 17:11:53 2023 |
Koji | Update | CDS | FSSSlow restoration | I came to the lab to see the recovery work
from the power glitch this morning 8:15AM.
All CDS seems up. The suspensions are somewhat |
|
|
3346
|
Sun Aug 1 21:40:27 2010 |
rana | Summary | PSL | FSS: SLOWDC response | I bet you thought that the NPRO slow actuator
response could be well represented by a pole
at ~0.1 Hz? Well, that's just what they want |
|
|
751
|
Mon Jul 28 23:41:07 2008 |
rob | Configuration | PSL | FSS/MC gains twiddled |
I found the FSS and MC gain settings in a
weird state. The FSS was showing excess |
|
|
121
|
Wed Nov 21 14:31:41 2007 |
rob | Update | PSL | FSS twiddle |
I `tweaked' the FSS path today. Here's what
I did:
|
|
|
8460
|
Thu Apr 18 02:51:52 2013 |
Den | Update | PSL | FSS slow servo | Today Rana pointed out that our FSS slow
servo is malfunctioning. It has been for
a while that our laser temperature control |
|
|
1050
|
Wed Oct 15 22:07:52 2008 |
pete | Configuration | PSL | FSS ref phase measurements | Optimizing the FSS LO/RF phase at 500 kHz,
above the servo band, proved to be noisy
and those measurements were useless. Today |
|
|
1052
|
Thu Oct 16 09:47:49 2008 |
Yoichi | Configuration | PSL | FSS ref phase measurements | [quote] I fit the bottom (quadratic) portion
of this curve, and found an optimum delay
of 25.8 ns, which can be implemented as 25.81 |
|
|
1046
|
Tue Oct 14 14:19:36 2008 |
pete | Configuration | PSL | FSS ref phase | Today I made several measurements which should
yield the optimized phase for the FSS 21.5
MHz reference. I made two sets of measurements, |
|
|
1054
|
Thu Oct 16 16:26:26 2008 |
pete | Configuration | PSL | FSS phase matching cable installed | RG 405 cable has a solid teflon dielectric,
and a velocity factor of 0.69. To get the
8.2 degrees of additional phase on the LO |
|
|
2343
|
Sat Nov 28 20:27:12 2009 |
Koji | Update | PSL | FSS oscillation: Total gain reduced | I stopped by the 40m for some reason and
found that the MC trans was 7.5.
This was caused by an oscillation |
|
|
711
|
Tue Jul 22 03:03:22 2008 |
John, Rob | Update | PSL | FSS open loop transfer function | With the common gain slider maxed out the
unity gain frequency is 58kHz.
|
|
|
715
|
Tue Jul 22 13:16:09 2008 |
John, Rob | Update | PSL | FSS open loop transfer function | [quote]With the common gain slider maxed out
the unity gain frequency is 58kHz.
|
|
|
927
|
Thu Sep 4 17:12:57 2008 |
Yoichi | Update | PSL | FSS open loop TF | I changed the gain settings of the FSS servo.
Now the Common Gain is 5dB (the last night
it was 2dB) and the Fast Gain is 12dB (formerly |
|
|
908
|
Mon Sep 1 19:23:17 2008 |
Yoichi | Configuration | PSL | FSS on an auxiliary loop | Summary: The FSS is now temporarily disabled.
Naturally, the MC won't lock. I will fix
it tomorrow morning.
|
|
|
910
|
Tue Sep 2 09:58:42 2008 |
Yoichi | Configuration | PSL | FSS on an auxiliary loop | [quote]Summary: The FSS is now temporarily
disabled. Naturally, the MC won't lock. I
will fix it tomorrow morning.
|
|