ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
814
|
Fri Aug 8 11:04:34 2008 |
Sharon | Update | | MCL Wiener filter | I took some old data from Rana and converted
the units of the Weiner filter to m/m so
to make the effect of the seismometer and |
|
11424
|
Fri Jul 17 04:56:37 2015 |
Ignacio | Update | General | MCL Wiener filtering + FIR to IIR conversion using vectfit |
We took data for the mode cleaner
a while ago, June 30th I believe. This data |
9x |
11425
|
Sat Jul 18 06:12:07 2015 |
Ignacio | Update | General | MCL Wiener filtering + FIR to IIR conversion using vectfit (Update) | (updateAfter Eric gave me feedback on my
previous elog post, I went back and fixed
some of the silly stuff I stated. |
15x |
7737
|
Wed Nov 21 01:36:36 2012 |
Koji | Update | IOO | MCL disabled / WFS clear history restored | As MCL is disturbing arm locking by injecting
a lot of noise, I have modified 'mcup'
to disable MCL |
|
8440
|
Thu Apr 11 03:23:12 2013 |
Den | Update | General | MCL threshold | MC down script is too slow to block MC_L
when the cavity goes out of lock. As a result
the loop strongly kicks MC2. We decided to |
|
7263
|
Thu Aug 23 22:21:13 2012 |
rana | Configuration | IOO | MCL turned back on | I turned on some filters and gain in the
SUS-MC2_MCL filter bank tonight so as suppress
the seismic noise influence on MC_F. This |
 |
6996
|
Fri Jul 20 14:18:15 2012 |
Den | Update | PEM | MCL, GUR calibration | I did a raw calibration of MCL and GUR.
Accuracy is a factor of 2.
GUR path : 800 V/m/s => readout |
|
7522
|
Wed Oct 10 20:27:40 2012 |
Den | Update | IOO | MCL, WFS triggers | I've added MCL and WFS stop triggers into
C1MCS/SUS model. Threshold value of MC_TRANS
can be changed in the text entry located |
 |
7572
|
Thu Oct 18 03:45:56 2012 |
Jenne | Update | IOO | MCL, WFS triggers |
|
|
7575
|
Thu Oct 18 12:02:32 2012 |
Den | Update | IOO | MCL, WFS triggers |
|
|
7578
|
Fri Oct 19 01:11:18 2012 |
Jenne | Update | IOO | MCL, WFS triggers |
|
|
10406
|
Mon Aug 18 09:42:50 2014 |
Koji | Summary | IOO | MCREFL PD charcterization | Riju did the
measurement of the MCREFL PD.
I found data files in her directory |
 |
12860
|
Wed Mar 1 17:25:28 2017 |
Steve | Update | LSC | MCREFL condition pictures | Gautam and Steve,
Our MCREFL rfpd |
   |
12891
|
Fri Mar 17 14:49:09 2017 |
gautam | Update | LSC | MCREFL condition pictures | I did a quick measurement of the beam size
on the MC REFL PD today morning. I disabled
the MC autolocker while this measurement |
  |
13716
|
Wed Mar 28 21:47:37 2018 |
arijit | Update | IOO | MCREFL_PD Optical response measurement | Kevin, Gautam and Arijit
We did a optical measurement of
the MCREFL_PD transimpedance using the Jenny |
 |
13719
|
Thu Mar 29 17:57:36 2018 |
arijit | Update | IOO | MCREFL_PD Optical response measurement | Kevin, Gautam and Arijit
Today we performed the in-loop
noise measurements of the MCREFL-PD using |
|
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 |
|
13724
|
Fri Mar 30 22:37:36 2018 |
Kevin | Update | IOO | MCREFL_PD Optical response measurement | [Gautam, Kevin]
We redid the measurement measuring
the voltage noise from the REFL PD demod |
|
2451
|
Thu Dec 24 19:13:29 2009 |
Koji | Update | IOO | MCT QPD investigation | I found that MCT QPD has a dependence of
the total output on the position of the spot.
Since the QPD needs the supply and bias voltages |
|
2454
|
Sun Dec 27 23:44:59 2009 |
rana | Update | Electronics | MCT QPD investigation |
|
|
2455
|
Mon Dec 28 01:17:01 2009 |
Koji | Update | Electronics | MCT QPD investigation | Unfortunately, the signals for individual
segments also suffer from the voltage drop
as all of the low impedance amplifiers are |
|
2448
|
Wed Dec 23 16:34:25 2009 |
Koji | Update | IOO | MCT QPD/MC REFL QPD disabled | For a certain investigation of the sum/diff
module for MCT QPD/MC REFL QPD, I removed
it from the system. |
|
4107
|
Tue Jan 4 18:37:18 2011 |
Jenne | Update | IOO | MCWFS aligned | I undid Yuta's
temporary setup, and put beam back on both |
|
1405
|
Mon Mar 16 01:20:40 2009 |
rana | Configuration | IOO | MCWFS noise filtered on the SUS-MC | [SIZE=4][COLOR=darkgreen]Recently[/COLOR][/SIZE],
we noticed that the IOO-WFS system runs at
2048 Hz and sends its signals to the MC SUS
|
|
5869
|
Fri Nov 11 00:55:53 2011 |
Den | Update | Adaptive Filtering | MC_F | [Mirko, Den]
Not satisfactory work of adaptive
filtering make us to think about the signals |
 |
5871
|
Fri Nov 11 10:30:27 2011 |
rana | Update | Adaptive Filtering | MC_F |
There should be a whitening
filter in the Pentek Generic DAQ board (Eurocard |
|
15857
|
Wed Mar 3 12:00:58 2021 |
Paco, Anchal | HowTo | IMC | MC_F ASD | [Paco, Anchal]
- Saved BURT backup in /users/anchal/BURTsnaps/
- Copied existing code for mode cleaner |
 |
553
|
Mon Jun 23 19:33:01 2008 |
rana, jenne | Update | IOO | MC_F Noise check | We looked at the MC_F spectrum because Rob
and Yoichi said that it had gone 'all crazy'.
It
|
|
993
|
Thu Sep 25 15:24:05 2008 |
Yoichi | Update | IOO | MC_F VCO calibration | I calibrated the VCO driving the AOM for the
AO path of the MC feedback.
|
|
1032
|
Tue Oct 7 21:19:40 2008 |
Yoichi | Update | IOO | MC_F calibrated spectrum | [COLOR=darkred]I updated the plots because
I did not take into account the double path
AOM effect, which doubles the frequency actuation |
  |
11281
|
Mon May 11 13:26:02 2015 |
manasa | Update | IMC | MC_F calibration | The last MC_F calibration was done by Ayaka
: Elog
7823 |
|
11284
|
Mon May 11 18:14:52 2015 |
rana | Update | IMC | MC_F calibration | I saw that entry, but it doesn't state
what the calibration is in units of Hz/counts.
It just gives the final calibrated spectrum. |
|
1747
|
Wed Jul 15 11:38:31 2009 |
rob | Update | Locking | MC_F channel dead | It's railed. This is what halted
locking progess on Monday night, as this
channel is used for the offloadMCF script, |
|
1758
|
Thu Jul 16 14:41:38 2009 |
rob | Update | Locking | MC_F channel dead |
|
 |
1759
|
Thu Jul 16 14:54:05 2009 |
rob | Update | Locking | MC_F channel dead |
|
|
3231
|
Thu Jul 15 19:13:03 2010 |
rana | Update | IOO | MC_F check | Sometimes I like to plot the spectrum of
MC_F. Its a good diagnosis of whether something
is wrong. |
|
6689
|
Sat May 26 00:08:41 2012 |
Den | Update | IOO | MC_F low frequency noise | MC_F low frequency noise might be
due to local damping electronics. I did not
measure OSEM noise, but even without it electronics |
    |
7003
|
Mon Jul 23 17:39:34 2012 |
Jenne | Update | IOO | MC_F vs. MC_L | [Rana, Jenne]
We looked at the different outputs
of the MC servo board to make sure they make |
|
968
|
Fri Sep 19 00:06:54 2008 |
rana | Update | IOO | MC_F: Too much frequency noise around 100 Hz | WE noticed this excess again in MC_F. We tried
recentering the WFS, but no effect.
|
|
1393
|
Thu Mar 12 02:18:42 2009 |
Yoichi | Update | Locking | MC_I spectra (RF_AM) | I took several spectra of MC_I signal (see
attm1).
|
 |
999
|
Fri Sep 26 16:13:57 2008 |
rana | Update | IOO | MC_L / MC_F crossover | We were trying to understand why the FAST_F
signal had such large excursions (~1V ~ 5
MHz).
|
|
7750
|
Tue Nov 27 00:45:20 2012 |
jamie | Update | IOO | MC_L and laser frequency noise spectra | I grabbed the a plot of the iLIGO PSL frequency
noise spectrum from the Rana manifesto:
|
 |
2062
|
Wed Oct 7 06:26:09 2009 |
rana | HowTo | IOO | MC_L calibration + some DTT lore | I drove MC2 in POS and used the
resulting response in MC_F to calibrate the
IOO-MC_L channel. |
 |
1768
|
Tue Jul 21 15:32:47 2009 |
Jenne | Update | IOO | MC_L flatlined | [Clara, Jenne]
While Clara was working on her Wiener
filtering and optimizing the locations of |
|
1770
|
Tue Jul 21 17:52:12 2009 |
Jenne | Update | IOO | MC_L flatlined |
|
|
1236
|
Fri Jan 16 18:45:20 2009 |
Yoichi | Configuration | IOO | MC_L gain increased by a factor of 2 | Rana, Yoichi
Since we fixed the FSS AOM double-pass, which |
 |
7252
|
Wed Aug 22 20:33:51 2012 |
Den | Update | Adaptive Filtering | MC_L in ARMS | Jenne and I did adaptive filtering of MC_L
and measured how X and Y ARM control signals
change compared to non-filtered MC_L. We |
|
7430
|
Sun Sep 23 22:40:48 2012 |
Den | Update | Modern Control | MC_L locking | I've applied LQR approach to MC_L locking.
Results show that LQR does not make MC_F
signal smaller below 0.3 Hz in contrast with |
|
14276
|
Tue Nov 6 15:32:24 2018 |
Steve | Update | PSL | MC_Transmitted | I tried to plot a long trend MC Transmitted
today. I could not get farther than
2017 |
|
5958
|
Sat Nov 19 06:04:43 2011 |
Suresh | Update | IOO | MC_WFS Servo: The MC2_TRANS_PIT and YAW loops switched ON | Without adding significant amounts of noise
to other WFS loops I have engaged the MC2_TRANS_PIT
and YAW loops. |
  |