| ID |
Date |
Author |
Type |
Category |
Subject |
Text |
 |
|
8807
|
Mon Jul 8 21:46:31 2013 |
manasa | Update | Green Locking | Beatbox | [Koji, Manasa]
I wanted to investigate on the ALS
electronics(in particular the beatbox and |
|
|
14502
|
Fri Mar 29 21:00:06 2019 |
gautam | Update | ALS | BeatMouth with NF1611s installed |
Newfocus 15V current limited supply
was taken from bottom NE corner of the ITMY
Oplev table to power the BeatMouth on the |
|
|
14498
|
Thu Mar 28 19:40:02 2019 |
gautam | Update | ALS | BeatMouth with NF1611s assembled | Summary:
The parts I was waiting for arrived.
I finished the beat mouth assembly, and did |
|
|
13957
|
Wed Jun 13 22:07:31 2018 |
gautam | Update | ALS | BeatMouth PDFR measurement | Summary:
Neither |
|
|
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 |
|
|
11361
|
Mon Jun 15 22:36:40 2015 |
rana, koji | Update | Green Locking | BeatBox Assay: not looking good | Because the ALS beatbox schematic is out-of-date
and misleading, we pulled the box to photograph
the current implementation and figure out |
|
|
11363
|
Fri Jun 19 01:24:26 2015 |
rana, koji | Update | Green Locking | BeatBox Assay: not looking good | We had decided a few days ago, to bypass
the IF part of the BeatBox board and put
some of the Haixing Maglev generic filter |
|
|
11364
|
Fri Jun 19 01:55:35 2015 |
ericq | Update | Green Locking | BeatBox Assay: not looking good |
|
|
|
5860
|
Thu Nov 10 05:54:23 2011 |
kiwamu | Update | Green Locking | Beat-note detected : PSL vs Y arm | [Katrin / Kiwamu]
The beat-note |
|
|
13566
|
Mon Jan 22 12:48:48 2018 |
Koji | Summary | General | Beat setup for aLIGO EOM test | I'm planning to construct a beat setup
between the PSL and AUX beams. I am going
to make it in the area shown in a blue square |
|
|
8819
|
Wed Jul 10 02:28:04 2013 |
Annalisa | Update | Green Locking | Beat notes lost! | [Manasa, Jenne, Annalisa]
I was going to find the beat note
to start the cavity scan, but I couldn't. |
|
|
8333
|
Fri Mar 22 23:23:38 2013 |
Annalisa | Update | Locking | Beat note still missing | [Annalisa, Manasa, Koji]
I updated the setup for the beat
note. The main reason is that I needed to |
|
|
8369
|
Thu Mar 28 23:00:30 2013 |
Annalisa | Update | ABSL | Beat note of ATF auxiliary laser found |
The beat note for the ATF lab laser
has been found. |
|
|
8361
|
Wed Mar 27 21:53:21 2013 |
Annalisa | Update | ABSL | Beat note of ATF auxiliary laser | After measuring the beat note, the "Alberto"
NPRO auxiliary laser has been moved from
the PSL table to the POY table. Its beam |
|
|
10918
|
Sat Jan 17 15:07:28 2015 |
manasa | Update | General | Beat note frequency discrepancy | I
was around the PSL table and the X end table
today. |
|
|
10956
|
Thu Jan 29 11:59:48 2015 |
manasa | Update | General | Beat note frequency discrepancy | Below is the set of plots comparing measurements
for the green and IR beat notes frequencies.
The measurements were made on the spectrum |
|
|
8345
|
Mon Mar 25 23:20:57 2013 |
Annalisa | Summary | Auxiliary locking | Beat note found! | [Annalisa, Manasa]
The beat note between the main PSL
and the auxiliarly NPRO has been found! |
|
|
8368
|
Thu Mar 28 19:32:22 2013 |
Annalisa | Summary | Auxiliary locking | Beat note found! |
I plot the variation of the
beat note frequency as a function of "Alberto" |
|
|
8386
|
Mon Apr 1 23:22:17 2013 |
Annalisa | Update | Auxiliary locking | Beat note between "Alberto" NPRO laser and PSL laser | I measured the beat note between the "Alberto"
NPRO laser and the PSL varying the PSL temperature
and find the matching NPRO temperature that |
|
|
8396
|
Tue Apr 2 22:39:17 2013 |
Annalisa | Update | Auxiliary locking | Beat note between "Alberto" NPRO laser and PSL laser |
The beat note between the PSL
laser and the "Alberto" NPRO laser |
|
|
4534
|
Fri Apr 15 22:54:20 2011 |
Aidan, Bryan | Update | Green Locking | Beat note amplitude on Vertex PD | I was investigating the beat note amplitude
on the vertex PD again yesterday. The incident
power on the PD was 150uW in the PSL green |
|
|
4502
|
Thu Apr 7 21:58:57 2011 |
Aidan | Summary | Green Locking | Beat note amplitude | Having convinced myself that the green
Hartmut PD is giving an acceptable response
at RF frequencies I decided to double-check |
|
|
11470
|
Thu Jul 30 15:58:00 2015 |
ericq | Update | LSC | Beat note Alignment fluctuation effects measured |
|
|
|
11478
|
Tue Aug 4 03:02:30 2015 |
ericq | Update | LSC | Beat note Alignment fluctuation effects measured | Notes from tonight's work:
PMC alignment tweaked.
Not much gained
WFS/MC2 offsets |
|
|
8721
|
Wed Jun 19 01:45:49 2013 |
Manasa | Update | Green Locking | Beat frequency sweep for 3FSR | Measurements:
1. Calibrating offset : |
|
|
10333
|
Tue Aug 5 19:05:41 2014 |
Akhil | Update | General | Beat Note Testing on EPICS Channels | |
|
|
14058
|
Thu Jul 12 15:15:47 2018 |
Sandrine | Update | | Beat Note Measurements for Cavity Scans | (Gautam, Sandrine)
We calculated the expected power
of the beat note for Annalisa's Y arm |
|
|
3864
|
Thu Nov 4 17:57:27 2010 |
steve | Update | General | BeamScanner is working again | Koji, Suresh and Steve,
The beam scanner is back from repair.
Koji and Suresh helped to move the I/O address |
|
|
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 |
|
|
7367
|
Sat Sep 8 00:04:53 2012 |
Jenne | Update | General | Beam scan measurement plan - to do Monday morning. | [MikeJ, Jenne]
We have a plan for how we're going
to measure the beam after PR3. Mike |
|
|
7369
|
Mon Sep 10 08:50:35 2012 |
Steve | Update | General | Beam scan measurement plan - to do Monday morning. |
I misaligned ITMX pitch on
Friday and brought out the beam at 44" |
|
|
511
|
Mon Jun 2 12:20:35 2008 |
josephb | Bureaucracy | Cameras | Beam scan has moved | The beamscan has been moved from the Rana
lab back over to the 40m, to be used to calibrate
the Prosilica cameras. |
|
|
12081
|
Mon Apr 18 00:29:00 2016 |
gautam | Update | General | Beam profiling + injection current scan | Summary
I've finished up the remaining
characterization of the repaired 1W Innolight |
6x |
|
8331
|
Fri Mar 22 01:28:56 2013 |
Manasa | Update | Lasers | Beam profile of NPRO from ATF | The NPRO from ATF has been installed on
the POY table.
I have been making measurements to |
|
|
11839
|
Wed Dec 2 17:14:33 2015 |
yutaro | Update | LSC | Beam on POX11 is possibly not centered well | I checked how POXDC level changes when
the angle of ITMX is varied. ETMX was misaligned.
Then I found that in YAW direction |
|
|
11847
|
Fri Dec 4 12:33:52 2015 |
yutaro | Update | LSC | Beam on POX11 is possibly not centered well | To focus POX beam on POX11 PD, I added
an iris and a lens before POX11 PD as you
can see in Attachment 1. |
|
|
11850
|
Fri Dec 4 23:02:13 2015 |
yutaro | Update | LSC | Beam on POX11 is possibly not centered well | [yutaro, Koji]
Now, the beam on POX11 PD is well
centered and well focused. |
|
|
17559
|
Mon Apr 24 18:33:22 2023 |
Alex | Update | IMC | Beam offset movement for MC1,2,3 in PIT and YAW from dither results | Mayank and I worked on finalizing the plots
for the beam offset from the dithering test
done in 17552. |
|
|
17516
|
Wed Mar 22 15:51:44 2023 |
Alex | Update | IMC | Beam offset calculation for MC1,2,3 from dither results | I have organized the resulting data from
running dither lines on MC1,2,3. The data
has been collected from diaggui as shown |
|
|
17519
|
Thu Mar 23 16:21:10 2023 |
rana | Update | IMC | Beam offset calculation for MC1,2,3 from dither results | I have changed the MC SUS output matrices
by a few % for some A2L decoupling - if it
causes trouble, please feel free to revert. |
|
|
17552
|
Wed Apr 19 17:32:11 2023 |
Alex | Update | IMC | Beam offset calculation for MC1,2,3 from dither results | Today, we ran dither lines on the MC1,2,3
mirrors in YAW from 136598007
to 1365981967 and similarly |
|
|
10325
|
Fri Aug 1 22:56:27 2014 |
Koji | Update | General | Beam lost in the chamber??? | I was investigating several issues on the
IFO. As many of you noticed and not elogged,
ITMX had frequent kicking without its oplev |
|
|
4222
|
Fri Jan 28 13:07:31 2011 |
Jenne | Update | IOO | Beam is back on the WFS | The MC WFS have had beam dumps in front
of them for the past ~2 weeks, until I could
find the appropriate optic to put in the |
|
|
12066
|
Thu Apr 7 12:51:24 2016 |
gautam | Update | endtable upgrade | Beam height differences | Steve has finished installing the enclosure
on the new endtable. So Eric and I decided
to try and lock the X arm and measure the |
|
|
7837
|
Mon Dec 17 11:20:58 2012 |
Jenne | Update | SUS | Beam dumps on vertex oplevs removed | I'm not sure when this was done, but there
were beam dumps in front of the lasers for
BS/PRM oplevs as well as ITMY/SRM oplevs. |
|
|
8279
|
Tue Mar 12 14:02:22 2013 |
Jenne | Update | Alignment | Beam drift - mystery partially solved? | Steve just told those of us in the control
room that the custodian who goes into the
IFO room regularly steps on the blue support |
|
|
11805
|
Tue Nov 24 11:18:47 2015 |
yutaro | Update | Optical Levers | Beam centering for the oplev of ITMY | I made the beam spot |
|
|
11783
|
Wed Nov 18 17:32:36 2015 |
yutaro | Update | Optical Levers | Beam centering for the oplev of ITMY | [yutaro, Koji]
|
|
|
11766
|
Mon Nov 16 11:48:34 2015 |
yutaro | Update | Optical Levers | Beam centering for the oplev of ETMY | [yutaro, ericq]
We made the beam spot on QPD for |
|
|
14919
|
Tue Oct 1 18:35:12 2019 |
gautam | Update | General | Beam centering campaign |
With TRX and TRY maximized using
ASS, I centered the Oplev spots on the respective
QPDs for the four test masses and the BS. |
|