| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
11333
|
Thu May 28 17:12:32 2015 |
ericq | Update | IOO | FSS SLOW not engaged: is this intentional? | Yes, I had turned it off while looking
for the PSL/X AUX beat, and forgot to turn
it back on. |
|
|
17261
|
Fri Nov 11 20:01:56 2022 |
rana | Frogs | Computer Scripts / Programs | FSS SLOW servo not running | I was trying to debug why the NPRO PZT
is all over the place, and it turns out that
the new FSS SLOW script is not actually running. |
|
|
17262
|
Fri Nov 11 20:59:13 2022 |
Chris | Frogs | Computer Scripts / Programs | FSS SLOW servo not running | The problem with trends was due to the
epics data collection process (standalone_edc)
that runs on c1sus. When all the FEs were |
|
|
17263
|
Sat Nov 12 21:59:24 2022 |
Anchal | Frogs | Computer Scripts / Programs | FSS SLOW servo not running | I stopped the Docker PID script and started
the old python script on megatron. Instructions
on how to do this are here. |
|
|
17281
|
Thu Nov 17 16:48:07 2022 |
Anchal | Frogs | Computer Scripts / Programs | FSS SLOW servo running Now | I've moved the FSS Slow PID script
running to megatron through systemd daemons.
The script is working as expected right now. |
|
|
3109
|
Wed Jun 23 18:05:00 2010 |
Koji | Configuration | PSL | FSS SLOWDC should be ~-4.0 | FSS SLOWDC slider is at around 0.
Please someone relock this at ~-4.0 to exploit |
|
|
3110
|
Wed Jun 23 23:08:30 2010 |
rana | Configuration | PSL | FSS SLOWDC should be ~-4.0 |
|
|
|
7265
|
Thu Aug 23 22:44:32 2012 |
Koji | Update | PSL | FSS Slow DC servo is turned off (not temporary) | [Koji Rana]
The FSS Slow DC servo was turned
off. |
|
|
13249
|
Thu Aug 24 17:36:11 2017 |
gautam | Update | CDS | FSS Slow Python maintenance | A couple of weeks ago, I was trying to
modernize the python version of the FSS Slow
temperature control loops, when I accidentally |
|
|
12627
|
Fri Nov 18 17:52:42 2016 |
gautam | Update | PSL | FSS Slow control -> Python, WFS re-engaged | [yinzi, craig, gautam]
Yinzi had translated the Perl PID
script used to implement the discrete-time |
|
|
12628
|
Sun Nov 20 23:53:38 2016 |
awade | Update | PSL | FSS Slow control -> Python, WFS re-engaged | I made a very slighly updated version of
Yinzi's script that pulls the channel
names and actuator hardstop limits from |
|
|
14472
|
Sat Mar 2 14:19:35 2019 |
gautam | Update | CDS | FSS Slow servo gains not burt-ed | PSL NPRO PZT voltage showed large low frequency
(hour timescale) excursions on the control
room StripTool trace, leading me to suspect |
|
|
10820
|
Fri Dec 19 16:59:32 2014 |
ericq | Update | Computer Scripts / Programs | FSS Slow servo moved to megatron | Given that op340m showed some undesired
behavior, and that the FSS slow seems prone
to railing lately, I've moved the FSS slow |
|
|
10824
|
Fri Dec 19 20:44:23 2014 |
Jenne | Update | Computer Scripts / Programs | FSS Slow servo moved to megatron | Today Q moved the FSS slow servo over to
some init thing on megatron, and some time
ago he did the same thing to the MC auto |
|
|
10825
|
Sat Dec 20 00:00:03 2014 |
ericq | Update | Computer Scripts / Programs | FSS Slow servo moved to megatron | I ssh'd in, and was able to run each script
manually successfully. I ran the initctl
commands, and they started up fine too. |
|
|
10840
|
Tue Dec 23 18:43:33 2014 |
diego | Update | Computer Scripts / Programs | FSS Slow servo moved to megatron |
|
|
|
10844
|
Fri Dec 26 18:20:42 2014 |
rana | Update | Computer Scripts / Programs | FSS Slow servo thresh change |
|
|
|
1842
|
Thu Aug 6 09:33:08 2009 |
alberto | Update | Locking | FSS Transmitted and Reflected Power Trends | I've now also trended the MOPA output
power for the last 200 days to check a possible
correlation with the FSS reflected power. |
|
|
1079
|
Thu Oct 23 21:52:27 2008 |
Yoichi | Update | PSL | FSS UGF now 450kHz | I measured the open loop transfer function
of the FSS, for the first time after I mitigated
the oscillation.
|
|
|
2720
|
Sun Mar 28 20:05:33 2010 |
rana | Summary | PSL | FSS Work from Sunday: AOM/VCO level set wrong | Just before working on the FSS today, I
noticed that the VCO RF output level was
set incorrectly. |
|
|
2721
|
Sun Mar 28 20:51:31 2010 |
rana | Summary | PSL | FSS Work from Sunday: Cavity Suspension is Ridiculously Undamped! | What
is the Transfer Function of the suspension |
|
|
2723
|
Sun Mar 28 23:47:47 2010 |
rana | Summary | PSL | FSS Work from Sunday: Open Loop Gain | I measured the open loop gain of the FSS
(as usual, I have multiplied the whole OLG
by 10dB to account for the forward loop gain |
|
|
2726
|
Mon Mar 29 02:07:50 2010 |
Koji | Summary | PSL | FSS Work from Sunday: Open Loop Gain |
|
|
|
2724
|
Mon Mar 29 01:11:33 2010 |
rana | Summary | PSL | FSS Work from Sunday: RF Out Spectrum | I measured the RF spectrum coming out
the FSS RFPD to look for saturations - its
close to the hairy edge. This is with |
|
|
2722
|
Sun Mar 28 23:17:46 2010 |
rana | Summary | PSL | FSS Work from Sunday: noise spec | This is the error point spectrum - it is
filled with huge multiples of ~75 kHz as
Yoichi noticed a couple years ago. |
|
|
134
|
Wed Nov 28 17:41:34 2007 |
rob | Update | PSL | FSS again | I investigated the FSS a bit more today.
I looked at the signals coming out of the
FSS frequency reference, and saw that both |
|
|
1061
|
Mon Oct 20 20:50:09 2008 |
Yoichi | Configuration | PSL | FSS board chip replacement | A quick update.
I changed two AD797s on the FSS board to |
|
|
10370
|
Tue Aug 12 18:20:13 2014 |
ericq | Update | IOO | FSS box TFs | I made some measurements of the FSS box
today, to have TFs for a loop model, but
also to see what the difference between the |
|
|
10380
|
Wed Aug 13 23:08:17 2014 |
rana | Update | IOO | FSS box TFs | As EQ pointed out recently, we're injecting
into the FSS error point just after an RF
pi filter, but before the VGA. We wondered |
|
|
15230
|
Thu Feb 27 15:50:37 2020 |
gautam | Update | Electronics | FSS box power cable removed | In 1X1, there is a box labelled "FSS
REF" below a KEPCO HV supply. This box
had a power cable that wasn't actually |
|
|
3573
|
Wed Sep 15 01:27:52 2010 |
rana, steve, valera | Update | PSL | FSS cables connected | - connected the TTFSS cables (FSS fast
goes directly to NPRO PZT for now)
- measured the reference cavity 21.5 |
|
|
958
|
Wed Sep 17 17:31:24 2008 |
Yoichi | Update | PSL | FSS calibration | I calibrated the reference cavity error signal
with the following procedure.
|
|
|
991
|
Thu Sep 25 10:48:29 2008 |
Yoichi | Update | PSL | FSS calibration again | I did a calibration of the FSS error signal
again with a different method.
This time, I swept the laser frequency with |
|
|
15310
|
Wed Apr 22 17:29:14 2020 |
gautam | Update | PSL | FSS debugging attempts | Summary:
On Monday, I hooked up an AG4395
to the PMC error point (using the active |
|
|
15312
|
Thu Apr 23 10:42:02 2020 |
rana | Update | PSL | FSS debugging attempts | I had set up the 4395 to do this automatically
a few years ago, but it looked
at the FSS/IMC instead. When the PCDRIVE |
|
|
929
|
Thu Sep 4 17:44:27 2008 |
Yoichi | Update | PSL | FSS error signal spectrum | Attached is a spectrum of the FSS error signal.
There are a lot of sharp peaks above 100kHz
(the UGF of the servo is about 200kHz).
|
|
|
8587
|
Thu May 16 01:41:31 2013 |
Jenne | Summary | IOO | FSS gain settings set |
|
|
|
684
|
Wed Jul 16 17:36:51 2008 |
John | DAQ | PSL | FSS input offset | I changed the nominal FSS input offset to
0 from 0.3. Tolerance remains unchanged at
+/-0.05. |
|
|
10928
|
Thu Jan 22 02:56:07 2015 |
ericq | Update | IOO | FSS input offset adjusted | Since Rana's overhaul of the IMC, the
FSS input offset had been sitting at zero.
Over the last day or so, I had |
|
|
575
|
Thu Jun 26 18:24:28 2008 |
Yoichi | Update | PSL | FSS input ofset slider problem - fixed | I checked the FSS servo interface board and
found that a LT1125CSW used to differentialize
offset channel was broken (no virtual short).
|
|
|
1048
|
Tue Oct 14 19:24:34 2008 |
Yoichi | Configuration | PSL | FSS light power reduced | Rana, Yoichi
To change the gain distribution in the FSS, |
|
|
3574
|
Wed Sep 15 01:58:28 2010 |
valera | Update | PSL | FSS locking | The RefCav is locked and aligned. I changed
the fast gain sign by changing the jumper
setting on the TTFSS board. The RefCav visibility |
|
|
3575
|
Wed Sep 15 03:08:26 2010 |
Koji | Update | PSL | FSS locking | Brilliant! This is the VERY way
how the things are to be conquered!
|
|
|
124
|
Tue Nov 27 15:45:08 2007 |
rob | Configuration | PSL | FSS loop |
It's unclear (to me, at least) what was the
end result of the FSS path tweaking before |
|
|
791
|
Mon Aug 4 13:43:02 2008 |
Yoichi | Summary | PSL | FSS loop calibration | As a part of the effort to repair the FSS
loop bandwidth, I tried to calibrate the
FSS loop.
|
|
|
758
|
Tue Jul 29 19:41:38 2008 |
Yoichi | Update | PSL | FSS loop transfer functions | Last night I measured a bunch of transfer
functions on the FSS loop.
All the loop gains were measured with the |
7x |
|
761
|
Tue Jul 29 23:04:34 2008 |
Yoichi | Update | PSL | FSS loop transfer functions | [quote]
The measurement of the PZT open loop TF is
very suspicious. According to this, the PC |
|
|
905
|
Fri Aug 29 22:57:48 2008 |
Yoichi | Update | PSL | FSS loop transfer functions | I've been measuring a bunch of transfer functions
of the FSS related stuffs.
There are a lot to be analyzed yet, but here |
|
|
907
|
Mon Sep 1 04:34:00 2008 |
rana | Update | PSL | FSS loop transfer functions | I started from 6th item in Yoichi's todo list.
1) Increased the setpoint of the thermostat |
|
|
3561
|
Sun Sep 12 23:16:52 2010 |
valera | Update | | FSS mode matching | The attached plot shows the beam scans
of the beam leaking from the back mirror
of the PMC to the BS cube that first turns |
|