ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
14019
|
Tue Jun 26 16:28:00 2018 |
gautam | Update | SUS | Coil driver protoboard characterization | I wanted to investigate my coil driver
noise measurement technique under more controlled
circumstances, so I spent yesterday setting |
   |
14018
|
Tue Jun 26 10:50:14 2018 |
pooja | Update | Cameras | Beam spot tracking using OpenCV | Aim: To track the motion of beam spot in
simulated video.
I simulated a video that moves |
|
14017
|
Tue Jun 26 10:06:39 2018 |
keerthana | Update | AUX | First Coherent AUX Scan of PRC Using AM Sidebands | (Jon, Keerthana, Sandrine)
I am attaching the plots of the
Reflected and transmitted AUX beam. In the |
 |
14016
|
Mon Jun 25 22:27:57 2018 |
shruti | Update | PEM | Seismometer temp control - heater circuit | After removing all the clamping screws
from the heater circuit board, I soldered
the wire connecting IRF630 to the output |
|
14015
|
Mon Jun 25 21:14:08 2018 |
Koji | Summary | General | Re: A summary of the Tip-TIlt Mirror Holder design changes | 3.
- Do we need this much of extended
range of the clamp location? How much range |
|
14014
|
Mon Jun 25 19:14:02 2018 |
Udit | Summary | General | Re: A summary of the Tip-TIlt Mirror Holder design changes | 2. Weighted screw rod at the bottom
for tilting the mirror-holder:
The screw length selected here |
 |
14013
|
Sun Jun 24 23:13:46 2018 |
johannes | Update | General | AUX beam alignment issues | At some point we want to change the AUX
injection on the AS table to interfere less
with the normal interferometer path, and |
|
14012
|
Sun Jun 24 20:02:07 2018 |
gautam | Update | SUS | Some notes about coil driver noise | Summary:
For a series resistance of 4.5
kohm, we are suffering from the noise-gain |
  |
14011
|
Sat Jun 23 20:54:35 2018 |
Koji | Update | AUX | First Coherent AUX Scan of PRC Using AM Sidebands | How much was the osc freq of the marconi?
And then how much was the resulting freq
offset between PSL and AUX? |
|
14010
|
Sat Jun 23 13:08:41 2018 |
Jon | Update | AUX | First Coherent AUX Scan of PRC Using AM Sidebands | [Jon, Keerthana, Sandrine]
Thu.-Fri. we continued with PRC
scans using the AUX laser, but now the "scanned" |
  |
14009
|
Fri Jun 22 18:30:21 2018 |
gautam | Update | SUS | ITMY_UL sensor | I think if the magnet fell off, we would
see high DC signal, and not 0 as we do now.
I suspect satellite box or PD readout board/cabling. |
|
14008
|
Fri Jun 22 15:22:39 2018 |
sudo | Update | CDS | DTT working |
Quote:
|
|
14007
|
Fri Jun 22 15:13:47 2018 |
gautam | Update | CDS | DTT working | Seems like DTT also works now. The trick
seems to be to run |
|
14006
|
Fri Jun 22 14:18:04 2018 |
Steve | Update | PSL | Optics on AS table |
|
|
14005
|
Fri Jun 22 10:42:52 2018 |
pooja | Update | | Developing neural networks | Aim: To find a model that trains the simulated
data of Gaussian beam spot moving in a vertical
direction by the application of a sinusoidal |
|
14004
|
Fri Jun 22 08:50:33 2018 |
Steve | Update | SUS | ITMY_UL sensor | We may lost the UL magnet or LED |
|
14003
|
Fri Jun 22 00:59:43 2018 |
gautam | Update | CDS | pianosa functional, but NO DTT | MEDM, EPICS and dataviewer seem to work,
but diaggui still doesn't work (it doesn't
work on Rossa either, same problem as reported |
|
14002
|
Fri Jun 22 00:06:13 2018 |
shruti | Update | General | over-head fluorescent lights down | Two out of the four over-head fluorescent
lights in the X end of the interferometer
were flickering today. |
|
14001
|
Thu Jun 21 23:59:12 2018 |
shruti | Update | PEM | Seismometer temp control | We (Rana and I) are re-assembling the temperature
controls on the seismometer to attempt PID
control and then improve it using reinforcement |
|
14000
|
Thu Jun 21 22:13:12 2018 |
gautam | Update | CDS | pianosa upgrade | pianosa |
|
13999
|
Thu Jun 21 18:25:57 2018 |
gautam | Update | SUS | ETMX coil driver re-installed | Initial tests look promising. Local damping
works and I
even locked the X arm using POX, |
|
13998
|
Thu Jun 21 15:32:05 2018 |
gautam | Update | Electronics | EX AA filter range change | [steve, gautam]
I took this opportunity of EX downtime
to change the supply voltage for the AA unit |
|
13997
|
Thu Jun 21 14:57:59 2018 |
Koji | Summary | General | A summary of the Tip-TIlt Mirror Holder design changes | > 2. Weighted screw rod at the
bottom for tilting the mirror-holder:
Too long. The design of the holder |
|
13996
|
Thu Jun 21 14:23:22 2018 |
Udit Khandelwal | Summary | General | A summary of the Tip-TIlt Mirror Holder design changes | Here’s a quick summary of the Tip-Tilt
Design updates (all files are in the dropbox
in [TipTiltSus>TT_New]) that I have been |
    |
13995
|
Thu Jun 21 13:24:00 2018 |
keerthana | Update | elog | The cavity scan data of June 20 | (Jon, Keerthana, Sandrine)
We tried to align the AUX and PSL
laser yesterday. We collected the data from |
 |
13994
|
Thu Jun 21 09:33:02 2018 |
Jon | Update | | AUX Mode Scans of YARM, PRC cavities | [Jon, Keerthana, Sandrina]
Yesterday we carried out preliminary
proof-of-concept measurements using |
 |
13993
|
Thu Jun 21 03:13:37 2018 |
gautam | Update | SUS | ETMX coil driver noise | I decided to take a quick look at the data.
Changes made to the ETMX coil driver board:
Fast path series resistances: |
  |
13992
|
Thu Jun 21 00:14:01 2018 |
gautam | Update | SUS | ETMX coil driver out | I finished the re-soldering work today,
and have measured the coil driver noise pre-Mods
and post-Mods. Analysis tomorrow. I am holding |
|
13991
|
Wed Jun 20 20:39:36 2018 |
pooja | Update | Cameras | CCD calibration using LED1050E |
|
|
13990
|
Wed Jun 20 09:16:56 2018 |
Steve | Update | PEM | dusty lab | You should wipe off the table cover before
you take it off next time.
It is important to turn up the |
   |
13989
|
Wed Jun 20 00:57:04 2018 |
johannes | Update | General | AUX beam alignment issues | We did swap a lens as discussed in elog 13968,
but they both had f=100mm specified, the
difference being one was AR-coated for 1064 |
 |
13988
|
Tue Jun 19 23:27:27 2018 |
gautam | Update | SUS | ETMX coil driver work in AM tomorrow | Per discussion today eve, barring objections, |
|
13987
|
Tue Jun 19 18:56:55 2018 |
Jon | Update | General | AUX beam alignment issues | Not much progress today with the AUX cavity
scans. I've determined there still are
some alignment issues. |
|
13986
|
Tue Jun 19 14:08:37 2018 |
pooja | Update | Cameras | CCD calibration using LED1050E | Aim: To measure the optical power from
led using a powermeter.
Yesterday Gautam drilled a larger |
|
13985
|
Tue Jun 19 00:19:00 2018 |
gautam | Update | ASC | POP status check | Motivation:
I want to use the QPD at
POP, calibrate it into physical units, and |
|
13984
|
Mon Jun 18 19:47:02 2018 |
gautam | Update | General | MICH actuator calibration | Summary:
The actuator (pendulum) gains for
the Beam Splitter and the two ITMs were measured |
  |
13983
|
Mon Jun 18 16:57:54 2018 |
Koji | Update | PSL | Optics on AS table | Of course, many (but no all) of the optics
were custom-ordered back in ~2000. |
|
13982
|
Mon Jun 18 15:59:17 2018 |
johannes | Update | PSL | Optics on AS table |
Quote:
|
|
13981
|
Mon Jun 18 14:32:42 2018 |
gautam | Update | PSL | Optics on AS table | Yesterday, I moved the following optics:
Lens in front of AS110
PD.
BS splitting light between |
|
13980
|
Mon Jun 18 12:07:03 2018 |
Koji | Update | General | Chiara new USB 4TB DIsk | The initial local backup with rsync was
done. Now
the new 4TB disk is (supposed to be) automatically |
|
13979
|
Mon Jun 18 11:12:23 2018 |
Kira | Summary | PEM | finishing up work at the lab | Since I am finishing my job at the lab,
I have stored all my electronics in a box
(attachment 1) and placed it under the table |
  |
13978
|
Mon Jun 18 10:34:45 2018 |
johannes | Update | Computer Scripts / Programs | running comsol job on optimus | I'm running a comsol job on optimus
in a tmux session named cryocavs. Should
be done in less than 24 hours, judging by |
|
13977
|
Sun Jun 17 14:20:35 2018 |
Koji | Update | General | Chiara new USB 4TB DIsk | I have connected a 4TB disk to chiara via
a USB-SATA adapter. This disk has been recognized
as /dev/sde. A GUID Partition Table (GPT), |
|
13976
|
Sat Jun 16 20:57:59 2018 |
Jon | Update | General | PRC modescan attempt | Here's a Finesse modeling of what
we're expecting to observe with this
test. It uses Gautam's base |
 |
13975
|
Sat Jun 16 01:25:29 2018 |
Koji | Update | General | PRC modescan attempt | The PRC FSR is, of course, very close to
twice of our f1 moudlation frequency (11MHz
x 2 = 22MHz) . |
|
13974
|
Sat Jun 16 00:26:48 2018 |
gautam | Update | General | PRC modescan attempt | [Jon, Gautam, Johannes]
We did the following today:
Dither align arms such |
|
13973
|
Fri Jun 15 14:22:05 2018 |
gautam | Update | ALS | BeatMouth PDFR measurement | I did the measurement with the BeatMouth
open today. Main changes:
Directly pipe the RF output |
 |
13972
|
Fri Jun 15 09:51:55 2018 |
pooja | Update | Cameras | Developing neural network | Aim : To develop a neural network on simulated
data.
I developed a python code that |
 |
13971
|
Fri Jun 15 09:14:42 2018 |
Steve | Update | General | Oplev sums | Oplev sums of 240 days.
|
|
13970
|
Fri Jun 15 08:09:15 2018 |
Steve | Bureaucracy | General | cleaning up at the PSL enclousure | The cabeling was cleaned up a little bit
yesterday morning. The upper back side is
still massy. |
  |