ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
15314
|
Thu Apr 30 07:29:01 2020 |
Chub | Update | VAC | N2 delivered. | Hi All,
The new nitrogen cylinders were
delivered to the rack at the west entrance. |
|
15416
|
Fri Jun 19 11:02:10 2020 |
Chub | Update | General | custom feedthrough flanges are here! | The four 4x25DSUB and single 8x25DSUB feedthrough
flanges have arrived and will be picked up
from the dock and brought to the 40M lab. |
|
15680
|
Tue Nov 17 13:24:40 2020 |
Chub | Update | General | big UPS on the way | Ordered 11/16 from CDW, on PO# S492940, the
high voltage Tripp Lite SMART5000XFMRXL |
|
15722
|
Thu Dec 10 11:07:24 2020 |
Chub | Update | VAC | UPS fault | Is that a fault code that you can decipher
in the manual, or just a light telling you
nothing but your UPS is dead? |
|
15723
|
Thu Dec 10 11:17:50 2020 |
Chub | Update | VAC | UPS fault | I can't find anything in the manual
that describes the nature of the FAULT message.
In fact, it's not mentioned at all. |
|
16058
|
Wed Apr 21 05:48:47 2021 |
Chub | Update | General | PSL HEPA Maintenance | Yikes! That's ONE filter.
I'll get another from storage. |
|
16074
|
Thu Apr 22 14:41:55 2021 |
Chub | Update | PSL | New HEPA speed control | When adjusting the blower speed, give the
blower at least 30 seconds to speed up or
slow down to the set speed. The flywheel |
|
16121
|
Wed May 5 13:05:07 2021 |
Chub | Update | General | chassis delivery from De Leone | Assembled chassis from De Leone placed
in the 40 Meter Lab, along the west wall
and under the display pedestal table. |
|
16155
|
Mon May 24 08:38:26 2021 |
Chub | Update | Electronics | 18-bit AI, 16-bit AI and 16-bit AA | - High priority units: 2x 18AI / 1x 16AI
/ 3x 16AA
All six are reworked and on the |
|
16160
|
Tue May 25 17:08:17 2021 |
Chub | Update | Electronics | chassis rework complete! | All remaining chasses have been reworked
and placed on the floor along the west wall
in Room 104. |
|
16472
|
Wed Nov 17 07:32:48 2021 |
Chub | Update | General | wire clamp plate mod | This will be difficult to modify with the
magnets and dumbells in place. Even
if someone CAN clamp this piece into an endmill |
|
16513
|
Thu Dec 16 15:04:12 2021 |
Chub | Update | Electronics | ITMX feedthroughs and in-vac cables installed | The ITMX 10" flange with four DSUB-25
feedthroughs has been install with the cables
connected at the in-vac side. See photo; |
|
16644
|
Thu Feb 3 14:47:12 2022 |
Chub | Update | Electronics | new UPS in place | Received the new 1100VA APC UPS today and
placed it at the bottom of the valve rack.
I'd connected the battery and plugged |
|
16646
|
Fri Feb 4 10:04:47 2022 |
Chub | Update | General | dish soap and clean scrub sponges! | Bought dish soap and scrub sponges today
and placed them under the sink with the other
dish supplies. |
|
16921
|
Wed Jun 15 17:12:39 2022 |
Cici | Summary | General | Preparation for AUX Loop Characterization | [Deeksha, Cici]
We went to the end Xarm station
and looked at the green laser setup and electronics. |
|
16926
|
Thu Jun 16 19:49:48 2022 |
Cici | Update | General | Using the SR785 | [Deeksha, Cici]
We used a python script to collect
data from the SR785 remotely. The SR785 is |
|
16933
|
Tue Jun 21 14:59:22 2022 |
Cici | Summary | General | AUX Transfer Function Loop Exploration | [Deeksha, Cici]
We learned about the auxillary
laser control loop, and then went into the |
|
16950
|
Mon Jun 27 13:25:50 2022 |
Cici | Update | General | Characterizing the Transfer Loop | [Deeksha, Cici]
We first took data of a simple
low pass filter, and attempted to perform |
   |
16955
|
Tue Jun 28 16:26:58 2022 |
Cici | Summary | General | Vector fitting open loop transfer function/Audio cancellation of optical table enclosure | [Deeksha, Cici]
We attempted to use vectfit to
fit our earlier transfer function data, and |
   |
17051
|
Mon Aug 1 17:19:39 2022 |
Cici | Summary | General | RPitaya Data on Jupyter Notebook | Have successfully plotted data from the
Red Pitaya on Jupyter Notebook! Have
lost years of my life fighting with PyQt. |
|
17070
|
Wed Aug 10 15:33:59 2022 |
Cici | Update | General | Working Red Pitaya VNA | TL;DR: I am now able to inject a swept
sine and measure a transfer function with
python on my Red Pitaya! Attached is |
|
17076
|
Thu Aug 11 17:15:33 2022 |
Cici | Update | General | Measuring AUX Laser UGF with Red Pitaya | TL;DR: Have successfully measured the UGF
of the AUX laser on my Red Pitaya! Attached
is one of my data runs (pdf + txt file). |
 |
17087
|
Wed Aug 17 10:27:49 2022 |
Cici | Update | General | Locking X-arm AUX laser | TL;DR: Got the x-arm aux laser locked again
and took more data - my fit on my transfer
functions need improvement and my new method |
 |
17090
|
Thu Aug 18 16:35:29 2022 |
Cici | Update | General | UGF linked to optical gain! | TL;DR: When the laser has good lock, the
OLTF moves up and the UGF moves over!
----------------------------------------------------------- |
 |
17101
|
Wed Aug 24 10:49:43 2022 |
Cici | Update | General | Measuring DFD output/X-arm laser PZT TF with Moku | We measured the TF of the X-arm laser PZT
using the Moku so we can begin fitting to
that data and hopefully creating a digital |
|
17103
|
Wed Aug 24 16:37:52 2022 |
Cici | Update | General | More DFD/AUX PZT resonance measurements | Some more measurements of the PZT resonances
(now zoomed in!) I'm adjusting parameters
on our model to try and fit to it by hand |
|
17106
|
Thu Aug 25 16:39:31 2022 |
Cici | Update | General | I have learned the absolute basics of github | I have now added code/data to my github
repository. (it's the little victories) |
|
17107
|
Fri Aug 26 12:46:07 2022 |
Cici | Update | General | Progress on fitting PZT resonances | Here is an update of how fitting the resonances
is going - I've been modifying parameters
by hand and seeing the effect on the fit. |
 |
17112
|
Mon Aug 29 18:25:12 2022 |
Cici | Update | General | Taking finer measurements of the actuator transfer function | Took finer measurements of the x-arm aux
laser actuator tranfer function (10 kHz -
1 MHz, 1024 pts/decade) using the Moku. |
  |
16993
|
Tue Jul 12 18:35:31 2022 |
Cici Hanna | Summary | General | Finding Zeros/Poles With Vectfit | Am still working on using vectfit to find
my zeros/poles of a transfer function - now
have a more specific project in mind, which |
|
17006
|
Fri Jul 15 16:20:16 2022 |
Cici Hanna | Update | General | Finding UGF | I have temporarily abandoned vectfit and
aaa since I've been pretty unsuccessful
with them and I don't need poles/zeroes |
   |
1692
|
Tue Jun 23 23:14:36 2009 |
Clara | Configuration | PEM | Accelerometers relocated | Both accelerometers have been moved in
an attempt to optimize their positions. The
MC1 accelerometer was moved from one green |
|
1696
|
Wed Jun 24 12:04:00 2009 |
Clara | Update | PEM | accelerometer clarification | When I said "MC1/MC2 accelerometers,"
I meant the entire three-axis accelerometer
set at each point. |
|
1698
|
Wed Jun 24 12:09:24 2009 |
Clara | Update | PEM | Week 1(ish) | I spent the week reading up on filter algorithm
theory, particularly Wiener filtering. I
have also learned how to get data from specific |
|
1703
|
Thu Jun 25 21:00:30 2009 |
Clara | Update | PEM | MC1 Accelerator set moved again; new XLR cables | I moved the MC1 set of accelerators. Might
have bumped things. If things aren't working,
look around the MC1 chamber. |
|
1704
|
Fri Jun 26 15:22:28 2009 |
Clara | Update | PEM | XLR cables tested and labeled | We now have two 80-foot, female-to-female
XLR cables for our pretty new microphones,
one yellow and one purple. They have been |
 |
1707
|
Sat Jun 27 02:48:09 2009 |
Clara | Update | PEM | I moved accelerometers and made some pretty pictures | I have been working on finding the best
spots to put the accelerometer sets in order
to best subtract out noise (seismometers |
6x |
1708
|
Sat Jun 27 03:16:16 2009 |
Clara | Update | PEM | Exciting microphone things! | So, I'm double-posting, but I figured the
last post was long enough as it was, and
this is about something different. After |
  |
1713
|
Thu Jul 2 05:27:12 2009 |
Clara | Update | PEM | Voltage Divider Oops | I tested the voltage dividers and was getting
up to about 3V. I retested the mic w/o the
voltage divider in place, and, lo and behold, |
|
1714
|
Thu Jul 2 06:31:35 2009 |
Clara | Update | PEM | First mic in place and connected | I clamped Bonnie (microphone) to the top
of a chamber near the vertex of the arms
and placed Clyde (pre-amp) on the table right |
|
1715
|
Thu Jul 2 16:45:06 2009 |
Clara | Update | PEM | Bonnie and Clyde are officially in operation! (Butch Cassidy and the Sundance Kid are in temp position) | I hooked up Bonnie and Clyde last night
and tested it today. First I tried some loud
noises to make sure I could identify them |
  |
1718
|
Tue Jul 7 16:06:59 2009 |
Clara | Update | Computer Scripts / Programs | DTT synchronization errors, help would be appreciated | I am attempting to use the DTT program
to look at the coherence of the individual
accelerometer signals with the MC_L signal. |
|
1723
|
Wed Jul 8 12:36:15 2009 |
Clara | Update | PEM | Coherences and things | After setting up the microphones last week,
I modified the Wiener filtering programs
so as to include the microphone signals. |
7x |
1726
|
Wed Jul 8 19:42:37 2009 |
Clara | Update | PEM | Bonnie moved to PSL, getting some coherence with the PMC_ERR channel | In her position overlooking whichever table
it is that is next to the PSL, Bonnie drummed
up some decent coherence with the PSL-PMC_ERR |
  |
1728
|
Thu Jul 9 19:05:32 2009 |
Clara | Update | PEM | more mic position changes; mics not picking up high frequencies | Bonnie has been strung up on bungees in
the PSL so that her position/orientation
can be adjusted however we like. She is now |
6x |
1744
|
Tue Jul 14 16:31:46 2009 |
Clara | Update | PEM | Frequency Response of Microphone (Bonnie) | So, I actually took these measurements
last week, but I didn't get around to making
nice plots and things until now. I figured |
 |
1757
|
Thu Jul 16 10:52:58 2009 |
Clara | Update | PEM | Single Channel TRS-RNC Cable | I made and tested a female-to-female TRS(audio)-RNC
cable. It only has a single channel, so it
won't work for stereo speakers or anything, |
|
1760
|
Fri Jul 17 18:04:54 2009 |
Clara | Update | PEM | Guralp Box Fail | I've been trying for most of the week to
get noise measurements on the output of the
Guralp box as well as scross the AD640 chip. |
  |
1767
|
Tue Jul 21 13:55:08 2009 |
Clara | Update | PEM | Guralp Box Success! | There managed to be just enough 100 kOhm
resistors to stuff all the "2"
channels (VERT2, N/S2, E/W2) with the fancy |
|
1800
|
Tue Jul 28 16:03:14 2009 |
Clara | Update | PEM | Guralp Seismometer cable pin diagram | I mapped out the corresponding pins on
both ends of the Guralp seismometer cable.
Here is the diagram: |
|