| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
7
|
Mon Oct 22 12:02:59 2007 |
ajw | Routine | General | STACIS as microseismic shaker | In case we ever want to use our Stacis systems
as shakers, check this:
[URL=http://www.techmfg.com/appnotes/Stacis_microseismic_shaker_appnote.htm]link[/URL] |
|
|
30
|
Tue Oct 30 13:58:07 2007 |
ajw | Configuration | IOO | MC Ringdowns | Here's a quick fit-by-eye to the latter part
of the data from tek00000.xls.
|
|
|
77
|
Wed Nov 7 10:55:21 2007 |
ajw | Configuration | Computers | backup script restarted | Following the reboot of computers on 10/31/07,
the backup script required restart (which
unfortunately "can't" be automated because |
|
|
144
|
Fri Nov 30 11:22:22 2007 |
ajw | Summary | CDS | GEO DV => LIGO DV | [quote][URL=http://www.aei.mpg.de/~hewitson/]Martin
Hewitson[/URL] of [B]GEO600[/B] fame has
modified the cool GEO DV
|
|
|
453
|
Sat Apr 26 11:21:15 2008 |
ajw | Omnistructure | Computers | backup of /cvs/cds restarted | The backup of /cvs/cds (which runs as a cron
job on fb40m; see /cvs/cds/caltech/scripts/backup/000README.txt)
|
|
|
457
|
Sun Apr 27 22:57:15 2008 |
ajw | DAQ | Computers | br40m? | [quote]
The testpoint manager (which runs on fb40m)
crashed this afternoon. Upon re-starting |
|
|
1854
|
Fri Aug 7 13:42:12 2009 |
ajw | Omnistructure | Computers | backup of frames restored | Ever since July 22, the backup script that
runs on fb40m has failed to ssh to ldas-cit.ligo.caltech.edu |
|
|
532
|
Thu Jun 12 15:09:33 2008 |
alan | Update | Locking | report | Rob: Awesome figure. As you can imagine, I
have lots of questions, and hope that you
will consider this figure to be the beginning, |
|
|
661
|
Fri Jul 11 23:55:25 2008 |
alan | Update | Locking | RF common mode at zero offset | [quote][I]rob, john, yoichi[/I]
[SIZE=3][FONT=Comic Sans MS]Last night we |
|
|
138
|
Thu Nov 29 10:36:47 2007 |
alberto | Configuration | Computer Scripts / Programs | Agilent 82357B GPIB to USB Interface Installation Procedeure | To run the Agilent Automation-Ready CD provided
with the interface is only the first step
of the installation. Apparently there should |
|
|
164
|
Wed Dec 5 10:57:08 2007 |
alberto | HowTo | Computers | Connecting the GPIBto USB interface to the Dell laptop | The interface works only on one of the USB
ports of the laptop (the one on the right,
looking at the computer from the back). |
|
|
165
|
Wed Dec 5 13:49:08 2007 |
alberto | Update | Electronics | RF AM PD lines monitor | In the last weeks I’ve been working on the
design of an electronic board to measure
directly the power of the main spectral lines |
|
|
173
|
Thu Dec 6 15:21:59 2007 |
alberto | Frogs | Electronics | RF Transfer Function of Stiff Aluminum Wires | Transfer function of 3cm long Aluminum wires
and of 3cm stranded wires |
|
|
188
|
Wed Dec 12 16:22:22 2007 |
alberto | Omnistructure | Electronics | LC filter for the RF-AM monitor circuit | In the LC configuration (see attached schematic)
the resonant frequency is tuned to one of
the peak of our RF-AM monitor and it is amplified |
|
|
190
|
Thu Dec 13 12:05:36 2007 |
alberto | Omnistructure | Electronics | The new Butterworth seems to work quite well | It works better probably because of the small
inductors I'm using this time.
The peak is at 30 MHz because I didn't have |
|
|
193
|
Mon Dec 17 11:47:13 2007 |
alberto | Update | Electronics | an alternative design for the RFAM monitor's filter at 33Mhz | Since the Butterworth turned out o be rather
wide-band, I tried an other configuration
for the 33 MHz filter. Attached are the simulated |
|
|
650
|
Tue Jul 8 21:58:22 2008 |
alberto | Update | General | Secondaty beam aligned to the IFO beam again | Yesterday the alignment of the secondary beam
to the IFO was completely lost and today
I had to realign all the optics before I |
|
|
943
|
Thu Sep 11 23:28:35 2008 |
alberto | Update | General | abs cavity length experiment | The MC lost lock for some reason not related
to either the FSS or the PMC I'm done with
my measurement for tonight. I've shut the |
|
|
1108
|
Mon Nov 3 19:12:27 2008 |
alberto | Update | General | Transverse mode spacing measurement for the X arm | I know a lot of expectations have been building
up on these days in the scientific community
at the 40m towards a conclusive elog entry |
|
|
1830
|
Tue Aug 4 23:03:56 2009 |
alberto | Update | Locking | IFO Alignment | After the mini boot fest that Jenne did
today, I checked whether that fixed the overflow
issues we yesterday prevented the alignemnt |
|
|
1833
|
Wed Aug 5 09:48:05 2009 |
alberto | Update | Locking | IFO Alignment |
|
|
|
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. |
|
|
2876
|
Tue May 4 06:32:58 2010 |
alberto | Configuration | PSL | RC Temperature Servo Turned OFF temporarily |
|
|
|
3075
|
Mon Jun 14 07:57:07 2010 |
alberto | Update | Locking | 40m Upgrade Optickle Model |
|
|
|
3079
|
Tue Jun 15 21:28:44 2010 |
alberto | Update | Locking | 40m Upgrade Optickle Model |
|
|
|
3009
|
Fri May 28 13:32:01 2010 |
alberto, kiwamu | Update | VAC | vacuum work | We started
a vacuum work in this morning. And still |
|
|
1843
|
Thu Aug 6 10:32:45 2009 |
alberto, rob | Update | Locking | More PSL trends: NPRO, MOPA, FSS, PMC and MZ | Here we trended also the PMC and
the MZ. The drop in the PMC happens at the
same rate as the MOPA's. |
|
|
425
|
Fri Apr 18 16:02:58 2008 |
alex | Update | SUS | end station sus front-end bug fix | installed and started new susEtmx.o and susEtmy.o
to fix a problem with ETMY optical lever
variables. |
|
|
17224
|
Thu Nov 3 16:00:58 2022 |
alex | Summary | General | Sensoray updates | I am currently working on getting the driver
reinstalled on Donatella for the sensoray.
An issue keeps arising that will not allow |
|
|
17239
|
Mon Nov 7 21:57:42 2022 |
alex | Update | General | Sensoray | I have made little progress in getting
the sensoray driver installed on Donatella.
I have confirmed that it is indeed the reason |
|
|
17247
|
Tue Nov 8 21:39:12 2022 |
alex | Summary | General | Sensoray & SDI Video Encoder selection | I have been looking at various replacements
for the sensoray, and have found that the
majority of new usb video encoders don't |
|
|
17267
|
Tue Nov 15 16:34:55 2022 |
alex | Update | General | Debian with Sensoray | I have confirmed the ability to install
the sensoray drivers on Debian 11 in a virtual
machine environment. I will |
|
|
3629
|
Thu Sep 30 17:11:01 2010 |
alex i | Update | CDS | DAQ system update | The frame builder is timed from the Symmetricom
GPS card now, which is getting the IRIGB
timecode from the freq. distribution amplifier |
|
|
15482
|
Wed Jul 15 17:46:05 2020 |
anchal | Summary | ALS | Noise budget for ALS | I started my attempt on noise budgeting
of ALS by going back to how Kiwamu did it
and adding as many sources as I could find |
|
|
15496
|
Mon Jul 20 19:21:16 2020 |
anchal | Summary | ALS | Few proposals for Voyager ALS | I've added 4
proposed schemes for implementing ALS
in voyager. Major thing to figure out is |
|
|
15587
|
Sat Sep 19 23:59:22 2020 |
anchal | Summary | ALS | ALS noise budget update | Setting the record straight
I
found out an error I did in copying some
control model values from Kiwamu's matlab |
|
|
15593
|
Tue Sep 22 00:14:43 2020 |
anchal | Summary | ALS | ALS noise budget update | This is not a reply to comments
given to the last post; Still working on
incorporating those suggestions. |
|
|
15601
|
Wed Sep 23 11:13:49 2020 |
anchal | Summary | ALS | ALS noise budget update | Yes, that loop was unstable. I started
using the time domain response to check for
the stability of loops now. I have been able |
|
|
15622
|
Fri Oct 9 18:32:14 2020 |
anchal | Summary | ALS | ALS noise budget update - Updated AUX PDH Loop values | The only two PZT Phase modulation transfer
function measurements I could find are 40m/15206 |
|
|
15626
|
Wed Oct 14 17:03:55 2020 |
anchal | Summary | ALS | ALS noise budget update - Added whitening filter for ADC | Koji recommended that I can add whitening
filters to suppress ADC noise easily. I added
a filter before ADC in ALS loop with 4 zeros |
|
|
15629
|
Thu Oct 15 13:48:58 2020 |
anchal | Summary | General | Lab Entry Notification | I entered 40m today at around 1:20 pm and
left by 1:45 pm. I entered 104 through the
machine shop entry. I did the following: |
|
|
15632
|
Fri Oct 16 19:44:41 2020 |
anchal | Summary | General | Lab Entry Notification | I entered 40m today at around 1:10 pm and
left by 1:50 pm. I entered 104 through the
machine shop entry. I took top view single |
|
|
15640
|
Fri Oct 23 09:03:43 2020 |
anchal | Update | Electronics | HV coil driver packaged into 2U chassis | Andrew made a battery-powered 0.7 nVrtHz
input-referred noise pre-amplifier for gain
of 200. That might help you. |
|
|
15650
|
Thu Oct 29 09:50:12 2020 |
anchal | Summary | Calibration | Preliminary calibration measurement taken | I went to 40m yesterday at around 2:30
pm and Koji showed me how to acquire lock
in different arms and for different lasers. |
|
|
15760
|
Tue Jan 12 08:21:47 2021 |
anchal | HowTo | CDS | Acromag wiring investigation | I used an Acromag XT1221 in CTN to play
around with different wiring and see what
works. Following are my findings: |
|
|
17674
|
Fri Jul 7 21:54:44 2023 |
andrei | Update | PEM | Foam setup | [andrei, advait]
We wrapped the puck in foam. We
also performed a calibration on the AD590 |
|
|
17687
|
Sat Jul 15 13:27:39 2023 |
andrei | Update | PEM | Foam setup | Update: we have a working "I"
controller for the puck. Here is the data:
|
|
|
17695
|
Tue Jul 18 16:01:01 2023 |
andrei | Update | PEM | Foam setup | We decided to verify the PWM accuracy by
adjusting the oscilloscope to fit a hundred
cycles of the signal and measuring the mean |
|
|
17726
|
Thu Jul 27 12:11:57 2023 |
andrei | Update | PEM | RL for nonlinear controllers | Here is a rundown of my work so far on
RL controllers for the puck:
Environment: I implemented |
|
|
17740
|
Tue Aug 1 14:26:11 2023 |
andrei | Update | PEM | RL for nonlinear controllers | Update
I have finished setting
up Neptune for easy access |
|